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openspec/changes/implement-wchnet-port-layer/.openspec.yaml

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+schema: spec-driven
+created: 2026-03-14

openspec/changes/implement-wchnet-port-layer/design.md

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+## Context
+
+当前 TCPClient 工程运行在裸机模式下，主循环直接轮询 WCHNET 和 DVP 任务。QDX 网络栈的 `qdx_tcp_logic` 被设计为多线程架构（3 个后台线程：1 个连接管理 + 2 个接收线程），依赖 `qdx_port.h` 定义的 11 个 HAL 函数（线程、互斥锁、延时、TCP socket），但这些函数在 `qdx_port_template.c` 中全部为空 stub。
+
+关键约束：
+- CH32V307 拥有 64KB SRAM，FreeRTOS 堆配置为 12KB
+- WCHNET 是 WCH 私有 TCP/IP 协议栈，**非 BSD socket 模型**——采用中断回调通知 + 同步轮询接收的混合模式
+- WCHNET 必须周期性调用 `WCHNET_MainTask()` 和全局中断处理才能驱动协议栈运转
+- 当前 `net_config.h` 中 `WCHNET_NUM_TCP = 1`，但双流架构（5511 控制流 + 5512 数据流）需要 2 个 TCP socket
+- FreeRTOS 的 RISC-V 移植已存在于 `prj/FreeRTOS_Core/FreeRTOS/portable/GCC/RISC-V/`
+
+## Goals / Non-Goals
+
+**Goals:**
+- 实现 `qdx_port.c` 全部 11 个 HAL 函数，使 `qdx_tcp_logic` 三线程架构实际运行
+- 将裸机主循环迁移为 FreeRTOS 多任务模型
+- 桥接 WCHNET 回调模型与 `qdx_port_tcp_recv` 的阻塞/半阻塞语义
+- 补全 `OnConfigUpdate` 和 `OnDetectionResult` 回调逻辑
+
+**Non-Goals:**
+- 不修改 `qdx_tcp_logic.c`、`qdx_protocol.c`、`qdx_preprocess.c` 的内部逻辑
+- 不实现外部硬件 DI 触发模式和连拍功能（属于后续 change）
+- 不移植到 LwIP 或其他 TCP/IP 协议栈
+
+## Decisions
+
+### Decision 1：FreeRTOS 任务划分
+
+将系统拆分为 4+3 个 FreeRTOS 任务：
+
+| 任务 | 优先级 | 栈大小 | 职责 |
+|------|--------|--------|------|
+| `task_wchnet` | 6 (高) | 1024 words | 周期调用 `WCHNET_MainTask()` + 全局中断处理 |
+| `task_business` | 5 | 1024 words | DVP 采集轮询 + 触发判定 + 预处理 + 封包发送 |
+| `tcp_mgr` | 3 | 512 words | 由 `TcpLogic_Start()` 创建，连接管理与心跳 |
+| `tcp_rx_c` | 4 | 512 words | 由 `TcpLogic_Start()` 创建，控制流接收 |
+| `tcp_rx_d` | 4 | 512 words | 由 `TcpLogic_Start()` 创建，数据流接收 |
+
+**理由**：`task_wchnet` 优先级最高，因为 WCHNET 协议栈需要及时处理底层以太网帧和 TCP 状态机；`task_business` 次之，确保 DVP 帧不丢失；TCP 后台线程优先级最低，属于非实时任务。
+
+**备选方案**：将 WCHNET 轮询放在定时器回调中而非独立任务——但 `WCHNET_MainTask()` 执行时间不确定，不适合放在中断上下文。
+
+### Decision 2：WCHNET 接收桥接方案——信号量 + 环形缓冲
+
+WCHNET 通过 `SINT_STAT_RECV` 中断通知数据到达，而 `qdx_port_tcp_recv` 被调用方期望为可阻塞/超时返回。桥接方案：
+
+1. 为每个 socket 维护一个**接收环形缓冲区**（`RxRingBuf`，2920 字节）和一个**二值信号量**（`xSemaphoreRx`）
+2. 在 `WCHNET_HandleSockInt` 的 `SINT_STAT_RECV` 分支中：调用 `WCHNET_SocketRecv()` 将数据读入 `RxRingBuf`，然后 `xSemaphoreGiveFromISR(xSemaphoreRx)`
+3. `qdx_port_tcp_recv()` 实现：先检查 `RxRingBuf` 是否有数据，有则直接拷贝返回；无则 `xSemaphoreTake(xSemaphoreRx, pdMS_TO_TICKS(100))` 阻塞等待最多 100ms，超时返回 0
+
+**理由**：这种方式让 recv 线程在无数据时让出 CPU（通过信号量阻塞），同时避免了忙等 10ms 轮询的 CPU 浪费。环形缓冲解耦了中断上下文读取和应用层消费的速率差异。
+
+**备选方案**：FreeRTOS Stream Buffer——语义更匹配但引入额外依赖，且 WCHNET 的 `SocketRecv` 已提供了长度信息，环形缓冲更简单可控。
+
+### Decision 3：Socket 映射管理
+
+WCHNET 使用 `uint8_t socketid`（0~30）标识 socket，而 `qdx_port.h` 使用 `void* qdx_socket_t` 不透明句柄。映射方案：
+
+- 维护一个静态数组 `SocketCtx_t g_sock_ctx[MAX_SOCKETS]`（MAX_SOCKETS = 2），每个元素包含：
+  - `uint8_t wchnet_sock_id` — WCHNET socket ID
+  - `uint8_t connected` — 是否已连接
+  - `RxRingBuf_t rx_ring` — 接收环形缓冲
+  - `SemaphoreHandle_t rx_sem` — 接收通知信号量
+- `qdx_port_tcp_connect()` 分配空闲的 `SocketCtx_t`，调用 `WCHNET_SocketCreat` + `WCHNET_SocketConnect`，返回 `&g_sock_ctx[i]` 作为句柄
+- `qdx_port_tcp_send/recv/close()` 从句柄中提取 `wchnet_sock_id` 操作 WCHNET API
+
+**Config 变更**：`WCHNET_NUM_TCP` 从 1 改为 2，`WCHNET_MAX_SOCKET_NUM` 相应变为 2。
+
+### Decision 4：TIM2 共享——FreeRTOS Tick + WCHNET Timer
+
+当前 TIM2 以 10ms 周期驱动 `WCHNET_TimeIsr()`。FreeRTOS 需要 2ms tick（`configTICK_RATE_HZ = 500`）。方案：
+
+- 将 TIM2 周期改为 **2ms**（匹配 FreeRTOS tick）
+- TIM2 ISR 中每次调用 `xPortSysTickHandler()`（FreeRTOS tick）
+- 设软件计数器，每累计 5 次（= 10ms）调用一次 `WCHNET_TimeIsr(WCHNETTIMERPERIOD)`
+
+**理由**：共用一个硬件定时器节省外设资源，软件分频几乎无开销。
+
+### Decision 5：`qdx_port_tcp_connect` 中的连接等待
+
+WCHNET 的 `WCHNET_SocketConnect()` 是异步的——它发起三次握手后立即返回，连接完成通过 `SINT_STAT_CONNECT` 中断通知。但 `qdx_port_tcp_connect` 语义是阻塞直到连接建立。
+
+方案：在 `SocketCtx_t` 中增加 `SemaphoreHandle_t connect_sem`。调用 `WCHNET_SocketConnect` 后 `xSemaphoreTake(connect_sem, pdMS_TO_TICKS(5000))` 阻塞。在 `SINT_STAT_CONNECT` 回调中 `xSemaphoreGive(connect_sem)`。超时返回 NULL。
+
+## Risks / Trade-offs
+
+**[RAM 占用偏紧]** → FreeRTOS 堆 12KB + 5 个任务栈约 9KB + WCHNET 内部约 10KB + 2×2920 socket 缓冲 + 2×2920 环形缓冲 + 2×10KB 发送缓冲区 ≈ 52KB / 64KB。**缓解**：严格控制任务栈大小，使用 `uxTaskGetStackHighWaterMark` 运行时监测；发送缓冲保持 10KB 不变（已经预分配）。如仍紧张可将 FreeRTOS 堆缩减至 8KB。
+
+**[WCHNET 非线程安全]** → WCHNET API 未声明线程安全性，多个 FreeRTOS 任务可能并发调用 send/recv。**缓解**：所有 WCHNET API 调用（send、recv、socket 操作）统一通过 `task_wchnet` 任务的消息队列委托执行，或者使用全局互斥锁保护。初期采用互斥锁方案，复杂度更低。
+
+**[中断上下文限制]** → `WCHNET_HandleSockInt` 在中断上下文被调用（通过 `WCHNET_HandleGlobalInt` → TIM2/ETH ISR 链），其中调用 `WCHNET_SocketRecv` 和 `xSemaphoreGiveFromISR` 必须确保安全。**缓解**：将 `WCHNET_HandleGlobalInt` 移出 ISR，改为在 `task_wchnet` 中轮询调用 `WCHNET_QueryGlobalInt`，这样 recv 回调运行在任务上下文，可安全使用 FreeRTOS API。
+
+**[双 Socket 内存增长]** → `WCHNET_NUM_TCP` 从 1 变为 2，`WCHNET_MEM_HEAP_SIZE` 和 `WCHNET_NUM_POOL_BUF` 相应增加约 3KB。**缓解**：CH32V307 有 64KB SRAM，增量可接受。

openspec/changes/implement-wchnet-port-layer/proposal.md

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+## Why
+
+当前 QDX 网络栈的硬件抽象层 (`qdx_port_template.c`) 全部 11 个函数均为空 stub，导致 `qdx_tcp_logic` 的双流管理、心跳重连以及 `qdx_preprocess` 的并发互斥等核心功能无法真正运行。该 port 层需要对接 CH32V307 平台的 WCHNET 协议栈和 FreeRTOS 操作系统原语，使整条"采集→预处理→TCP 封包发送"的业务流水线实际贯通。
+
+## What Changes
+
+- 将 FreeRTOS 内核合入 TCPClient 工程（源码已存在于 `prj/FreeRTOS_Core/`），完成编译链接集成。
+- 新增 `qdx_port.c`（基于 `qdx_port_template.c`），使用 FreeRTOS + WCHNET API 实现全部 port 函数：
+  - 时间与延时：`qdx_port_get_tick_ms` / `qdx_port_delay_ms` → `xTaskGetTickCount` / `vTaskDelay`。
+  - 互斥锁：`qdx_port_mutex_*` → `xSemaphoreCreateMutex` / `xSemaphoreTake` / `xSemaphoreGive`。
+  - 线程：`qdx_port_thread_create` → `xTaskCreate`。
+  - TCP Socket：`qdx_port_tcp_connect` / `send` / `recv` / `close` → 封装 WCHNET 的 socket 创建、`WCHNET_SocketSend`、接收回调缓冲与 `WCHNET_SocketClose`。
+- **BREAKING**：`main.c` 主循环重构为 FreeRTOS 任务调度模型，`main()` 末尾调用 `vTaskStartScheduler()` 替代裸机 `while(1)` 轮询。
+- 补全 `OnConfigUpdate` 回调，联级调用 `Preprocess_Settings_Change` 使上位机参数热更新生效。
+- 补全 `OnDetectionResult` 回调，实现 NG 剔除 GPIO DO 输出及定时器延时复位。
+
+## Capabilities
+
+### New Capabilities
+- `freertos-wchnet-port`: 基于 FreeRTOS 和 WCHNET 实现 `qdx_port.h` 定义的全部硬件/OS 抽象接口（时间、延时、互斥锁、线程、TCP socket），使 QDX 网络栈在 CH32V307 上实际运行。
+
+### Modified Capabilities
+- `tcp-stream-logic`: 回调实现补全——`ConfigUpdateCallback_t` 内联级调用 `Preprocess_Settings_Change`；`DetectionResultCallback_t` 内驱动 DO GPIO 执行 NG 剔除动作及定时复位。
+
+## Impact
+
+- **构建系统**：TCPClient 工程需链接 FreeRTOS 源文件（tasks.c、queue.c、list.c、timers.c、port.c、heap_4.c）和对应的 include 路径。
+- **main.c**：从裸机 `while(1)` 重构为 RTOS 多任务——主业务任务（DVP 采集 + 预处理 + 发送）、WCHNET 轮询任务、以及 `qdx_tcp_logic` 创建的 3 个后台线程。
+- **内存**：FreeRTOS 内核 + 任务栈额外占用约 8-12 KB RAM，需确认 CH32V307 64KB SRAM 余量充足。
+- **中断**：TIM2 中断需同时服务 FreeRTOS tick 和 WCHNET 定时器。
+- **依赖**：`FreeRTOSConfig.h` 需要适配 CH32V307 时钟频率与中断优先级。

openspec/changes/implement-wchnet-port-layer/specs/freertos-wchnet-port/spec.md

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+## ADDED Requirements
+
+### Requirement: 系统时间获取
+`qdx_port_get_tick_ms()` 必须返回自系统启动以来的毫秒级单调递增时间戳，精度不低于 FreeRTOS tick 周期（2ms）。
+
+#### Scenario: 获取系统运行时间
+- **WHEN** 任意任务或模块调用 `qdx_port_get_tick_ms()`
+- **THEN** 返回值为基于 `xTaskGetTickCount()` 转换的毫秒数，且数值不会回绕至 0（在 uint32_t 溢回之前）
+
+### Requirement: 任务级阻塞延时
+`qdx_port_delay_ms()` 必须让当前 FreeRTOS 任务挂起指定毫秒数，期间让出 CPU 给其他任务。
+
+#### Scenario: 延时期间 CPU 让出
+- **WHEN** 后台线程调用 `qdx_port_delay_ms(100)`
+- **THEN** 该任务进入阻塞态约 100ms，其余就绪任务在此期间获得调度
+
+### Requirement: 互斥锁创建与操作
+`qdx_port_mutex_create/lock/unlock/delete` 必须基于 FreeRTOS 互斥信号量实现，支持跨任务的临界区保护和优先级继承。
+
+#### Scenario: 并发访问配置结构体
+- **WHEN** `tcp_rx_c` 线程正在更新 `ConfigCommon_t` 且 `task_business` 同时读取该结构体
+- **THEN** 互斥锁确保同一时刻仅一个任务可访问，防止数据撕裂
+
+#### Scenario: 互斥锁删除
+- **WHEN** 调用 `qdx_port_mutex_delete` 并传入有效句柄
+- **THEN** FreeRTOS 信号量资源被释放，句柄失效
+
+### Requirement: 线程（任务）创建
+`qdx_port_thread_create` 必须通过 `xTaskCreate` 创建 FreeRTOS 任务，并正确映射名称、入口函数、栈大小和优先级参数。
+
+#### Scenario: TcpLogic_Start 创建三个后台任务
+- **WHEN** `TcpLogic_Start()` 依次调用 `qdx_port_thread_create` 创建 `tcp_mgr`、`tcp_rx_c`、`tcp_rx_d`
+- **THEN** 三个 FreeRTOS 任务被成功创建并开始调度执行
+
+### Requirement: TCP Socket 连接建立
+`qdx_port_tcp_connect` 必须创建 WCHNET TCP socket、配置目标 IP/端口，发起连接并阻塞等待三次握手完成（或超时 5 秒返回 NULL）。
+
+#### Scenario: 成功连接至上位机
+- **WHEN** 调用 `qdx_port_tcp_connect("192.168.1.50", 5511)` 且上位机正在监听
+- **THEN** WCHNET 完成 TCP 三次握手后，`SINT_STAT_CONNECT` 中断释放连接信号量，函数返回有效的 `qdx_socket_t` 句柄
+
+#### Scenario: 连接超时
+- **WHEN** 调用 `qdx_port_tcp_connect` 但目标主机不可达
+- **THEN** 阻塞等待 5 秒后超时，释放已分配的 WCHNET socket 资源，返回 NULL
+
+### Requirement: TCP 数据发送
+`qdx_port_tcp_send` 必须将指定缓冲区数据通过 `WCHNET_SocketSend` 写入 TCP 发送队列，并返回实际发送的字节数。
+
+#### Scenario: 发送温度帧数据
+- **WHEN** `TcpLogic_BuildAndSendTemperatureFrame` 组装完成后调用 `qdx_port_tcp_send` 发送到数据流 socket
+- **THEN** 数据被提交至 WCHNET 发送缓冲，函数返回已发送的字节数
+
+#### Scenario: 连接已断开时发送
+- **WHEN** 对一个已断开的 socket 调用 `qdx_port_tcp_send`
+- **THEN** 函数返回 < 0 表示错误
+
+### Requirement: TCP 数据接收（信号量阻塞模式）
+`qdx_port_tcp_recv` 必须从 socket 关联的接收环形缓冲中读取数据。若缓冲为空，则阻塞等待信号量通知（最长 100ms 超时），超时返回 0。
+
+#### Scenario: 接收上位机配置指令
+- **WHEN** 上位机通过 5511 端口发送配置报文，WCHNET 中断触发将数据写入环形缓冲并释放信号量
+- **THEN** `tcp_rx_c` 线程从阻塞中唤醒，`qdx_port_tcp_recv` 返回实际读取的字节数和数据
+
+#### Scenario: 无数据超时
+- **WHEN** 100ms 内未收到任何数据
+- **THEN** 函数返回 0，调用方继续执行心跳或重连检查逻辑
+
+#### Scenario: 对端关闭连接
+- **WHEN** WCHNET 检测到对端断开（`SINT_STAT_DISCONNECT`）
+- **THEN** 函数返回 < 0，通知调用方连接已失效
+
+### Requirement: TCP Socket 关闭
+`qdx_port_tcp_close` 必须调用 `WCHNET_SocketClose` 释放 WCHNET socket 资源，清空关联的环形缓冲，并将 `SocketCtx_t` 标记为空闲。
+
+#### Scenario: 正常关闭
+- **WHEN** 连接管理线程检测到超时并调用 `qdx_port_tcp_close`
+- **THEN** WCHNET socket 被关闭，环形缓冲清零，`SocketCtx_t.connected = 0`，该槽位可被后续连接复用
+
+### Requirement: WCHNET 协议栈周期驱动
+系统必须在独立的高优先级 FreeRTOS 任务 `task_wchnet` 中周期调用 `WCHNET_MainTask()` 和 `WCHNET_HandleGlobalInt()`，确保以太网帧收发和 TCP 状态机正常运转。
+
+#### Scenario: 协议栈持续驱动
+- **WHEN** FreeRTOS 调度器启动后
+- **THEN** `task_wchnet` 以约 5~10ms 周期持续驱动 WCHNET 协议栈，socket 中断事件被及时处理
+
+### Requirement: Socket 映射与上下文管理
+系统必须维护静态 `SocketCtx_t` 数组（容量 = 2），管理 WCHNET socket ID 到 `qdx_socket_t` 不透明句柄的映射，以及每个 socket 关联的环形接收缓冲和信号量。
+
+#### Scenario: 双流同时活跃
+- **WHEN** 控制流 (5511) 和数据流 (5512) 同时建立连接
+- **THEN** 两个 `SocketCtx_t` 槽位被分别占用，各自拥有独立的 WCHNET socket ID、接收缓冲和信号量
+
+### Requirement: net_config.h 双 Socket 配置
+`WCHNET_NUM_TCP` 必须从 1 修改为 2，以支持控制流和数据流两个并发 TCP 连接，相关宏（`WCHNET_MAX_SOCKET_NUM`、`WCHNET_NUM_POOL_BUF`、`WCHNET_MEM_HEAP_SIZE` 等）随之联动更新。
+
+#### Scenario: 两个 TCP socket 可同时创建
+- **WHEN** 系统初始化后依次创建控制流和数据流 socket
+- **THEN** 两个 `WCHNET_SocketCreat` 调用均成功返回不同的 socket ID
+
+### Requirement: TIM2 共享 FreeRTOS Tick 与 WCHNET Timer
+TIM2 必须配置为 2ms 周期，ISR 中每次调用 FreeRTOS tick handler，并以软件计数器每 5 次（10ms）调用一次 `WCHNET_TimeIsr()`。
+
+#### Scenario: 双定时源正常工作
+- **WHEN** 系统运行中
+- **THEN** FreeRTOS 以 500Hz 频率获得 tick 中断，WCHNET 以 100Hz 频率获得定时服务，两者互不干扰
+
+### Requirement: main 函数重构为 RTOS 启动模型
+`main()` 在完成硬件初始化和 WCHNET 初始化后，必须创建 `task_wchnet` 和 `task_business` 两个初始任务，然后调用 `vTaskStartScheduler()` 启动调度器，不再使用裸机 `while(1)` 主循环。
+
+#### Scenario: 调度器启动
+- **WHEN** `main()` 完成 ETH_LibInit、DVP_Init、Preprocess_Init、TcpLogic_Init 后
+- **THEN** 调用 `vTaskStartScheduler()` 进入 RTOS 调度，所有业务逻辑在任务上下文中执行
+
+### Requirement: FreeRTOS 内核集成
+TCPClient 工程必须链接 FreeRTOS 内核源文件（tasks.c、queue.c、list.c、timers.c、port.c、heap_4.c）和 RISC-V 移植文件，并配置 `FreeRTOSConfig.h` 适配 CH32V307 时钟和中断。
+
+#### Scenario: 工程编译通过
+- **WHEN** 将 FreeRTOS 源文件和 include 路径加入 TCPClient 构建配置
+- **THEN** 工程编译无错误，FreeRTOS API 可正常调用

openspec/changes/implement-wchnet-port-layer/specs/tcp-stream-logic/spec.md

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+## MODIFIED Requirements
+
+### Requirement: Remote Parameters updating via callbacks
+必须注册实现监听由上位机下发的配置动作以及废料剔除等行为（基于 `ConfigUpdateCallback_t` 和 `DetectionResultCallback_t` 句柄），让这批回调充当系统动态控制信号输入源。回调函数体必须包含完整的业务逻辑实现。
+
+#### Scenario: Update Triggering config on the fly
+- **WHEN** 通过 5511 端口收到控制主机的有效组包设置参数报文时
+- **THEN** `OnConfigUpdate` 回调被触发，内部必须调用 `Preprocess_Settings_Change(cfg2d, cfg1d, common)` 将新参数同步至预处理模块，使后续帧立即使用更新后的阈值与裁剪尺寸
+
+#### Scenario: NG defect removal trigger by Host
+- **WHEN** 上位机判别系统对某帧评估失败（NG）并发回 `DetectionResult_t` 报文（`resultStatus != 0`）时
+- **THEN** `OnDetectionResult` 回调被触发，必须拉高预设 DO GPIO 引脚（驱动剔除气缸/报警灯），启动软件定时器维持高电平 `NGioDelay` 毫秒后自动拉低复位

openspec/changes/implement-wchnet-port-layer/tasks.md

@@ -0,0 +1,62 @@
+## 1. 构建系统与 FreeRTOS 集成
+
+- [x] 1.1 将 FreeRTOS 内核源文件（tasks.c、queue.c、list.c、timers.c）和内存管理（MemMang/heap_4.c）复制或链接到 TCPClient 工程目录
+- [x] 1.2 将 RISC-V 移植文件（portable/GCC/RISC-V/port.c、portASM.S、portmacro.h）加入工程
+- [x] 1.3 将 `FreeRTOSConfig.h` 从 `prj/FreeRTOS_Core/User/` 复制到 `prj/TCPClient/User/` 并适配：确认 `configTICK_RATE_HZ=500`、`configTOTAL_HEAP_SIZE=12288`、`configCPU_CLOCK_HZ=SystemCoreClock`
+- [x] 1.4 更新 TCPClient 工程 makefile/构建配置，添加 FreeRTOS 源文件和 include 路径，确保编译通过
+
+## 2. net_config.h 双 Socket 配置
+
+- [x] 2.1 修改 `net_config.h` 中 `WCHNET_NUM_TCP` 从 1 改为 2
+- [x] 2.2 验证 `WCHNET_MAX_SOCKET_NUM`、`WCHNET_NUM_POOL_BUF`、`WCHNET_NUM_TCP_SEG`、`WCHNET_MEM_HEAP_SIZE` 等联动宏自动调整正确
+- [x] 2.3 扩展 `main.c` 中 `SocketRecvBuf` 数组尺寸为 `[2][RECE_BUF_LEN]`，`socket` 数组为 `[2]`
+
+## 3. TIM2 重构——共享 FreeRTOS Tick 与 WCHNET Timer
+
+- [x] 3.1 修改 `TIM2_Init` 将定时周期从 10ms 改为 2ms（`TIM_Period = 2000 - 1`）
+- [x] 3.2 修改 `TIM2_IRQHandler`：每次调用 `xPortSysTickHandler()` 驱动 FreeRTOS tick，并用静态计数器每 5 次调用一次 `WCHNET_TimeIsr(WCHNETTIMERPERIOD)`
+- [x] 3.3 维护 `sys_tick_ms` 每次 +2 替代原来 +10
+
+## 4. qdx_port.c 核心实现——时间、延时、互斥、线程
+
+- [x] 4.1 新建 `prj/TCPClient/Middle/QDXnetworkStack/qdx_port.c`（基于 template），include FreeRTOS headers
+- [x] 4.2 实现 `qdx_port_get_tick_ms()`：返回 `xTaskGetTickCount() * portTICK_PERIOD_MS`
+- [x] 4.3 实现 `qdx_port_delay_ms()`：调用 `vTaskDelay(pdMS_TO_TICKS(ms))`
+- [x] 4.4 实现 `qdx_port_mutex_create/lock/unlock/delete`：封装 `xSemaphoreCreateMutex`、`xSemaphoreTake(portMAX_DELAY)`、`xSemaphoreGive`、`vSemaphoreDelete`
+- [x] 4.5 实现 `qdx_port_thread_create`：调用 `xTaskCreate` 映射 name、entry、arg、stack_size、priority
+
+## 5. qdx_port.c Socket 层实现——映射与桥接
+
+- [x] 5.1 定义 `SocketCtx_t` 结构体（wchnet_sock_id、connected、rx_ring、rx_sem、connect_sem）和静态数组 `g_sock_ctx[2]`
+- [x] 5.2 实现环形缓冲 `RxRingBuf_t` 的 init/write/read/available 操作（容量 2920 字节）
+- [x] 5.3 实现 `qdx_port_tcp_connect`：分配空闲 SocketCtx → 填充 SOCK_INF（PROTO_TYPE_TCP、目标 IP/Port）→ `WCHNET_SocketCreat` → `WCHNET_SocketConnect` → `xSemaphoreTake(connect_sem, 5000ms)` 阻塞等待连接完成
+- [x] 5.4 实现 `qdx_port_tcp_send`：校验句柄有效性 → 互斥锁保护 → `WCHNET_SocketSend(ctx->wchnet_sock_id, data, &len)`
+- [x] 5.5 实现 `qdx_port_tcp_recv`：检查 rx_ring 有数据直接读取返回；否则 `xSemaphoreTake(rx_sem, 100ms)` 阻塞 → 唤醒后再次检查 rx_ring → 返回数据或 0（超时）或 <0（连接断开）
+- [x] 5.6 实现 `qdx_port_tcp_close`：`WCHNET_SocketClose(ctx->wchnet_sock_id, 0)` → 清空 rx_ring → 标记 ctx 为空闲
+
+## 6. WCHNET 中断回调改造
+
+- [x] 6.1 修改 `WCHNET_HandleSockInt` 的 `SINT_STAT_RECV` 分支：通过 wchnet_sock_id 查找对应 SocketCtx → `WCHNET_SocketRecv` 读数据写入 rx_ring → `xSemaphoreGive(rx_sem)` 通知接收线程
+- [x] 6.2 修改 `SINT_STAT_CONNECT` 分支：查找对应 SocketCtx → 标记 `connected = 1` → `xSemaphoreGive(connect_sem)` 唤醒等待线程
+- [x] 6.3 修改 `SINT_STAT_DISCONNECT` 和 `SINT_STAT_TIM_OUT` 分支：标记 `connected = 0` → `xSemaphoreGive(rx_sem)` 确保阻塞中的 recv 能被唤醒退出
+
+## 7. main.c 重构为 RTOS 多任务
+
+- [x] 7.1 新增 `task_wchnet_entry` 函数：循环调用 `WCHNET_MainTask()` + `WCHNET_QueryGlobalInt` / `WCHNET_HandleGlobalInt`，周期约 5ms
+- [x] 7.2 新增 `task_business_entry` 函数：将原 `while(1)` 中的 DVP_Task + Frame 触发判定 + 预处理 + 封包发送逻辑迁入
+- [x] 7.3 修改 `main()` 函数：保留硬件初始化（SystemCoreClockUpdate、USART、DVP_Init、TIM2_Init、ETH_LibInit）→ Preprocess_Init → TcpLogic_Init → TcpLogic_RegisterCallbacks → `xTaskCreate(task_wchnet)` → `xTaskCreate(task_business)` → `vTaskStartScheduler()`
+- [x] 7.4 删除 `main()` 中的 `while(1)` 裸机主循环
+
+## 8. 回调逻辑补全
+
+- [x] 8.1 补全 `OnConfigUpdate`：内部调用 `Preprocess_Settings_Change(cfg2d, cfg1d, common)` 将新参数同步至预处理模块
+- [x] 8.2 补全 `OnDetectionResult`：当 `isOK == 0` 时拉高 NG DO GPIO 引脚，启动 FreeRTOS 软件定时器（`xTimerCreate`）延时 `NGioDelay` ms 后在回调中拉低复位
+- [x] 8.3 初始化 NG DO GPIO 引脚为推挽输出（在 main 硬件初始化阶段添加）
+
+## 9. 验证与调试
+
+- [ ] 9.1 编译整个 TCPClient 工程，修复链接错误
+- [ ] 9.2 使用 `uxTaskGetStackHighWaterMark` 验证各任务栈余量，防止溢出
+- [ ] 9.3 连接上位机测试控制流(5511)与数据流(5512)双连接建立、心跳和重连
+- [ ] 9.4 触发一帧图像，验证完整链路：DVP 采集 → 触发判定 → 预处理提取 → TCP 封包发送 → 上位机收到数据
+- [ ] 9.5 测试上位机下发参数更新，验证 Preprocess 参数热更新生效

prj/TCPClient/FreeRTOS/event_groups.c

@@ -0,0 +1,777 @@
+/*
+ * FreeRTOS Kernel V10.4.6
+ * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * https://www.FreeRTOS.org
+ * https://github.com/FreeRTOS
+ *
+ */
+
+/* Standard includes. */
+#include <stdlib.h>
+
+/* Defining MPU_WRAPPERS_INCLUDED_FROM_API_FILE prevents task.h from redefining
+ * all the API functions to use the MPU wrappers.  That should only be done when
+ * task.h is included from an application file. */
+#define MPU_WRAPPERS_INCLUDED_FROM_API_FILE
+
+/* FreeRTOS includes. */
+#include "FreeRTOS.h"
+#include "task.h"
+#include "timers.h"
+#include "event_groups.h"
+
+/* Lint e961, e750 and e9021 are suppressed as a MISRA exception justified
+ * because the MPU ports require MPU_WRAPPERS_INCLUDED_FROM_API_FILE to be defined
+ * for the header files above, but not in this file, in order to generate the
+ * correct privileged Vs unprivileged linkage and placement. */
+#undef MPU_WRAPPERS_INCLUDED_FROM_API_FILE /*lint !e961 !e750 !e9021 See comment above. */
+
+/* The following bit fields convey control information in a task's event list
+ * item value.  It is important they don't clash with the
+ * taskEVENT_LIST_ITEM_VALUE_IN_USE definition. */
+#if configUSE_16_BIT_TICKS == 1
+    #define eventCLEAR_EVENTS_ON_EXIT_BIT    0x0100U
+    #define eventUNBLOCKED_DUE_TO_BIT_SET    0x0200U
+    #define eventWAIT_FOR_ALL_BITS           0x0400U
+    #define eventEVENT_BITS_CONTROL_BYTES    0xff00U
+#else
+    #define eventCLEAR_EVENTS_ON_EXIT_BIT    0x01000000UL
+    #define eventUNBLOCKED_DUE_TO_BIT_SET    0x02000000UL
+    #define eventWAIT_FOR_ALL_BITS           0x04000000UL
+    #define eventEVENT_BITS_CONTROL_BYTES    0xff000000UL
+#endif
+
+typedef struct EventGroupDef_t
+{
+    EventBits_t uxEventBits;
+    List_t xTasksWaitingForBits; /*< List of tasks waiting for a bit to be set. */
+
+    #if ( configUSE_TRACE_FACILITY == 1 )
+        UBaseType_t uxEventGroupNumber;
+    #endif
+
+    #if ( ( configSUPPORT_STATIC_ALLOCATION == 1 ) && ( configSUPPORT_DYNAMIC_ALLOCATION == 1 ) )
+        uint8_t ucStaticallyAllocated; /*< Set to pdTRUE if the event group is statically allocated to ensure no attempt is made to free the memory. */
+    #endif
+} EventGroup_t;
+
+/*-----------------------------------------------------------*/
+
+/*
+ * Test the bits set in uxCurrentEventBits to see if the wait condition is met.
+ * The wait condition is defined by xWaitForAllBits.  If xWaitForAllBits is
+ * pdTRUE then the wait condition is met if all the bits set in uxBitsToWaitFor
+ * are also set in uxCurrentEventBits.  If xWaitForAllBits is pdFALSE then the
+ * wait condition is met if any of the bits set in uxBitsToWait for are also set
+ * in uxCurrentEventBits.
+ */
+static BaseType_t prvTestWaitCondition( const EventBits_t uxCurrentEventBits,
+                                        const EventBits_t uxBitsToWaitFor,
+                                        const BaseType_t xWaitForAllBits ) PRIVILEGED_FUNCTION;
+
+/*-----------------------------------------------------------*/
+
+#if ( configSUPPORT_STATIC_ALLOCATION == 1 )
+
+    EventGroupHandle_t xEventGroupCreateStatic( StaticEventGroup_t * pxEventGroupBuffer )
+    {
+        EventGroup_t * pxEventBits;
+
+        /* A StaticEventGroup_t object must be provided. */
+        configASSERT( pxEventGroupBuffer );
+
+        #if ( configASSERT_DEFINED == 1 )
+            {
+                /* Sanity check that the size of the structure used to declare a
+                 * variable of type StaticEventGroup_t equals the size of the real
+                 * event group structure. */
+                volatile size_t xSize = sizeof( StaticEventGroup_t );
+                configASSERT( xSize == sizeof( EventGroup_t ) );
+            } /*lint !e529 xSize is referenced if configASSERT() is defined. */
+        #endif /* configASSERT_DEFINED */
+
+        /* The user has provided a statically allocated event group - use it. */
+        pxEventBits = ( EventGroup_t * ) pxEventGroupBuffer; /*lint !e740 !e9087 EventGroup_t and StaticEventGroup_t are deliberately aliased for data hiding purposes and guaranteed to have the same size and alignment requirement - checked by configASSERT(). */
+
+        if( pxEventBits != NULL )
+        {
+            pxEventBits->uxEventBits = 0;
+            vListInitialise( &( pxEventBits->xTasksWaitingForBits ) );
+
+            #if ( configSUPPORT_DYNAMIC_ALLOCATION == 1 )
+                {
+                    /* Both static and dynamic allocation can be used, so note that
+                     * this event group was created statically in case the event group
+                     * is later deleted. */
+                    pxEventBits->ucStaticallyAllocated = pdTRUE;
+                }
+            #endif /* configSUPPORT_DYNAMIC_ALLOCATION */
+
+            traceEVENT_GROUP_CREATE( pxEventBits );
+        }
+        else
+        {
+            /* xEventGroupCreateStatic should only ever be called with
+             * pxEventGroupBuffer pointing to a pre-allocated (compile time
+             * allocated) StaticEventGroup_t variable. */
+            traceEVENT_GROUP_CREATE_FAILED();
+        }
+
+        return pxEventBits;
+    }
+
+#endif /* configSUPPORT_STATIC_ALLOCATION */
+/*-----------------------------------------------------------*/
+
+#if ( configSUPPORT_DYNAMIC_ALLOCATION == 1 )
+
+    EventGroupHandle_t xEventGroupCreate( void )
+    {
+        EventGroup_t * pxEventBits;
+
+        /* Allocate the event group.  Justification for MISRA deviation as
+         * follows:  pvPortMalloc() always ensures returned memory blocks are
+         * aligned per the requirements of the MCU stack.  In this case
+         * pvPortMalloc() must return a pointer that is guaranteed to meet the
+         * alignment requirements of the EventGroup_t structure - which (if you
+         * follow it through) is the alignment requirements of the TickType_t type
+         * (EventBits_t being of TickType_t itself).  Therefore, whenever the
+         * stack alignment requirements are greater than or equal to the
+         * TickType_t alignment requirements the cast is safe.  In other cases,
+         * where the natural word size of the architecture is less than
+         * sizeof( TickType_t ), the TickType_t variables will be accessed in two
+         * or more reads operations, and the alignment requirements is only that
+         * of each individual read. */
+        pxEventBits = ( EventGroup_t * ) pvPortMalloc( sizeof( EventGroup_t ) ); /*lint !e9087 !e9079 see comment above. */
+
+        if( pxEventBits != NULL )
+        {
+            pxEventBits->uxEventBits = 0;
+            vListInitialise( &( pxEventBits->xTasksWaitingForBits ) );
+
+            #if ( configSUPPORT_STATIC_ALLOCATION == 1 )
+                {
+                    /* Both static and dynamic allocation can be used, so note this
+                     * event group was allocated statically in case the event group is
+                     * later deleted. */
+                    pxEventBits->ucStaticallyAllocated = pdFALSE;
+                }
+            #endif /* configSUPPORT_STATIC_ALLOCATION */
+
+            traceEVENT_GROUP_CREATE( pxEventBits );
+        }
+        else
+        {
+            traceEVENT_GROUP_CREATE_FAILED(); /*lint !e9063 Else branch only exists to allow tracing and does not generate code if trace macros are not defined. */
+        }
+
+        return pxEventBits;
+    }
+
+#endif /* configSUPPORT_DYNAMIC_ALLOCATION */
+/*-----------------------------------------------------------*/
+
+EventBits_t xEventGroupSync( EventGroupHandle_t xEventGroup,
+                             const EventBits_t uxBitsToSet,
+                             const EventBits_t uxBitsToWaitFor,
+                             TickType_t xTicksToWait )
+{
+    EventBits_t uxOriginalBitValue, uxReturn;
+    EventGroup_t * pxEventBits = xEventGroup;
+    BaseType_t xAlreadyYielded;
+    BaseType_t xTimeoutOccurred = pdFALSE;
+
+    configASSERT( ( uxBitsToWaitFor & eventEVENT_BITS_CONTROL_BYTES ) == 0 );
+    configASSERT( uxBitsToWaitFor != 0 );
+    #if ( ( INCLUDE_xTaskGetSchedulerState == 1 ) || ( configUSE_TIMERS == 1 ) )
+        {
+            configASSERT( !( ( xTaskGetSchedulerState() == taskSCHEDULER_SUSPENDED ) && ( xTicksToWait != 0 ) ) );
+        }
+    #endif
+
+    vTaskSuspendAll();
+    {
+        uxOriginalBitValue = pxEventBits->uxEventBits;
+
+        ( void ) xEventGroupSetBits( xEventGroup, uxBitsToSet );
+
+        if( ( ( uxOriginalBitValue | uxBitsToSet ) & uxBitsToWaitFor ) == uxBitsToWaitFor )
+        {
+            /* All the rendezvous bits are now set - no need to block. */
+            uxReturn = ( uxOriginalBitValue | uxBitsToSet );
+
+            /* Rendezvous always clear the bits.  They will have been cleared
+             * already unless this is the only task in the rendezvous. */
+            pxEventBits->uxEventBits &= ~uxBitsToWaitFor;
+
+            xTicksToWait = 0;
+        }
+        else
+        {
+            if( xTicksToWait != ( TickType_t ) 0 )
+            {
+                traceEVENT_GROUP_SYNC_BLOCK( xEventGroup, uxBitsToSet, uxBitsToWaitFor );
+
+                /* Store the bits that the calling task is waiting for in the
+                 * task's event list item so the kernel knows when a match is
+                 * found.  Then enter the blocked state. */
+                vTaskPlaceOnUnorderedEventList( &( pxEventBits->xTasksWaitingForBits ), ( uxBitsToWaitFor | eventCLEAR_EVENTS_ON_EXIT_BIT | eventWAIT_FOR_ALL_BITS ), xTicksToWait );
+
+                /* This assignment is obsolete as uxReturn will get set after
+                 * the task unblocks, but some compilers mistakenly generate a
+                 * warning about uxReturn being returned without being set if the
+                 * assignment is omitted. */
+                uxReturn = 0;
+            }
+            else
+            {
+                /* The rendezvous bits were not set, but no block time was
+                 * specified - just return the current event bit value. */
+                uxReturn = pxEventBits->uxEventBits;
+                xTimeoutOccurred = pdTRUE;
+            }
+        }
+    }
+    xAlreadyYielded = xTaskResumeAll();
+
+    if( xTicksToWait != ( TickType_t ) 0 )
+    {
+        if( xAlreadyYielded == pdFALSE )
+        {
+            portYIELD_WITHIN_API();
+        }
+        else
+        {
+            mtCOVERAGE_TEST_MARKER();
+        }
+
+        /* The task blocked to wait for its required bits to be set - at this
+         * point either the required bits were set or the block time expired.  If
+         * the required bits were set they will have been stored in the task's
+         * event list item, and they should now be retrieved then cleared. */
+        uxReturn = uxTaskResetEventItemValue();
+
+        if( ( uxReturn & eventUNBLOCKED_DUE_TO_BIT_SET ) == ( EventBits_t ) 0 )
+        {
+            /* The task timed out, just return the current event bit value. */
+            taskENTER_CRITICAL();
+            {
+                uxReturn = pxEventBits->uxEventBits;
+
+                /* Although the task got here because it timed out before the
+                 * bits it was waiting for were set, it is possible that since it
+                 * unblocked another task has set the bits.  If this is the case
+                 * then it needs to clear the bits before exiting. */
+                if( ( uxReturn & uxBitsToWaitFor ) == uxBitsToWaitFor )
+                {
+                    pxEventBits->uxEventBits &= ~uxBitsToWaitFor;
+                }
+                else
+                {
+                    mtCOVERAGE_TEST_MARKER();
+                }
+            }
+            taskEXIT_CRITICAL();
+
+            xTimeoutOccurred = pdTRUE;
+        }
+        else
+        {
+            /* The task unblocked because the bits were set. */
+        }
+
+        /* Control bits might be set as the task had blocked should not be
+         * returned. */
+        uxReturn &= ~eventEVENT_BITS_CONTROL_BYTES;
+    }
+
+    traceEVENT_GROUP_SYNC_END( xEventGroup, uxBitsToSet, uxBitsToWaitFor, xTimeoutOccurred );
+
+    /* Prevent compiler warnings when trace macros are not used. */
+    ( void ) xTimeoutOccurred;
+
+    return uxReturn;
+}
+/*-----------------------------------------------------------*/
+
+EventBits_t xEventGroupWaitBits( EventGroupHandle_t xEventGroup,
+                                 const EventBits_t uxBitsToWaitFor,
+                                 const BaseType_t xClearOnExit,
+                                 const BaseType_t xWaitForAllBits,
+                                 TickType_t xTicksToWait )
+{
+    EventGroup_t * pxEventBits = xEventGroup;
+    EventBits_t uxReturn, uxControlBits = 0;
+    BaseType_t xWaitConditionMet, xAlreadyYielded;
+    BaseType_t xTimeoutOccurred = pdFALSE;
+
+    /* Check the user is not attempting to wait on the bits used by the kernel
+     * itself, and that at least one bit is being requested. */
+    configASSERT( xEventGroup );
+    configASSERT( ( uxBitsToWaitFor & eventEVENT_BITS_CONTROL_BYTES ) == 0 );
+    configASSERT( uxBitsToWaitFor != 0 );
+    #if ( ( INCLUDE_xTaskGetSchedulerState == 1 ) || ( configUSE_TIMERS == 1 ) )
+        {
+            configASSERT( !( ( xTaskGetSchedulerState() == taskSCHEDULER_SUSPENDED ) && ( xTicksToWait != 0 ) ) );
+        }
+    #endif
+
+    vTaskSuspendAll();
+    {
+        const EventBits_t uxCurrentEventBits = pxEventBits->uxEventBits;
+
+        /* Check to see if the wait condition is already met or not. */
+        xWaitConditionMet = prvTestWaitCondition( uxCurrentEventBits, uxBitsToWaitFor, xWaitForAllBits );
+
+        if( xWaitConditionMet != pdFALSE )
+        {
+            /* The wait condition has already been met so there is no need to
+             * block. */
+            uxReturn = uxCurrentEventBits;
+            xTicksToWait = ( TickType_t ) 0;
+
+            /* Clear the wait bits if requested to do so. */
+            if( xClearOnExit != pdFALSE )
+            {
+                pxEventBits->uxEventBits &= ~uxBitsToWaitFor;
+            }
+            else
+            {
+                mtCOVERAGE_TEST_MARKER();
+            }
+        }
+        else if( xTicksToWait == ( TickType_t ) 0 )
+        {
+            /* The wait condition has not been met, but no block time was
+             * specified, so just return the current value. */
+            uxReturn = uxCurrentEventBits;
+            xTimeoutOccurred = pdTRUE;
+        }
+        else
+        {
+            /* The task is going to block to wait for its required bits to be
+             * set.  uxControlBits are used to remember the specified behaviour of
+             * this call to xEventGroupWaitBits() - for use when the event bits
+             * unblock the task. */
+            if( xClearOnExit != pdFALSE )
+            {
+                uxControlBits |= eventCLEAR_EVENTS_ON_EXIT_BIT;
+            }
+            else
+            {
+                mtCOVERAGE_TEST_MARKER();
+            }
+
+            if( xWaitForAllBits != pdFALSE )
+            {
+                uxControlBits |= eventWAIT_FOR_ALL_BITS;
+            }
+            else
+            {
+                mtCOVERAGE_TEST_MARKER();
+            }
+
+            /* Store the bits that the calling task is waiting for in the
+             * task's event list item so the kernel knows when a match is
+             * found.  Then enter the blocked state. */
+            vTaskPlaceOnUnorderedEventList( &( pxEventBits->xTasksWaitingForBits ), ( uxBitsToWaitFor | uxControlBits ), xTicksToWait );
+
+            /* This is obsolete as it will get set after the task unblocks, but
+             * some compilers mistakenly generate a warning about the variable
+             * being returned without being set if it is not done. */
+            uxReturn = 0;
+
+            traceEVENT_GROUP_WAIT_BITS_BLOCK( xEventGroup, uxBitsToWaitFor );
+        }
+    }
+    xAlreadyYielded = xTaskResumeAll();
+
+    if( xTicksToWait != ( TickType_t ) 0 )
+    {
+        if( xAlreadyYielded == pdFALSE )
+        {
+            portYIELD_WITHIN_API();
+        }
+        else
+        {
+            mtCOVERAGE_TEST_MARKER();
+        }
+
+        /* The task blocked to wait for its required bits to be set - at this
+         * point either the required bits were set or the block time expired.  If
+         * the required bits were set they will have been stored in the task's
+         * event list item, and they should now be retrieved then cleared. */
+        uxReturn = uxTaskResetEventItemValue();
+
+        if( ( uxReturn & eventUNBLOCKED_DUE_TO_BIT_SET ) == ( EventBits_t ) 0 )
+        {
+            taskENTER_CRITICAL();
+            {
+                /* The task timed out, just return the current event bit value. */
+                uxReturn = pxEventBits->uxEventBits;
+
+                /* It is possible that the event bits were updated between this
+                 * task leaving the Blocked state and running again. */
+                if( prvTestWaitCondition( uxReturn, uxBitsToWaitFor, xWaitForAllBits ) != pdFALSE )
+                {
+                    if( xClearOnExit != pdFALSE )
+                    {
+                        pxEventBits->uxEventBits &= ~uxBitsToWaitFor;
+                    }
+                    else
+                    {
+                        mtCOVERAGE_TEST_MARKER();
+                    }
+                }
+                else
+                {
+                    mtCOVERAGE_TEST_MARKER();
+                }
+
+                xTimeoutOccurred = pdTRUE;
+            }
+            taskEXIT_CRITICAL();
+        }
+        else
+        {
+            /* The task unblocked because the bits were set. */
+        }
+
+        /* The task blocked so control bits may have been set. */
+        uxReturn &= ~eventEVENT_BITS_CONTROL_BYTES;
+    }
+
+    traceEVENT_GROUP_WAIT_BITS_END( xEventGroup, uxBitsToWaitFor, xTimeoutOccurred );
+
+    /* Prevent compiler warnings when trace macros are not used. */
+    ( void ) xTimeoutOccurred;
+
+    return uxReturn;
+}
+/*-----------------------------------------------------------*/
+
+EventBits_t xEventGroupClearBits( EventGroupHandle_t xEventGroup,
+                                  const EventBits_t uxBitsToClear )
+{
+    EventGroup_t * pxEventBits = xEventGroup;
+    EventBits_t uxReturn;
+
+    /* Check the user is not attempting to clear the bits used by the kernel
+     * itself. */
+    configASSERT( xEventGroup );
+    configASSERT( ( uxBitsToClear & eventEVENT_BITS_CONTROL_BYTES ) == 0 );
+
+    taskENTER_CRITICAL();
+    {
+        traceEVENT_GROUP_CLEAR_BITS( xEventGroup, uxBitsToClear );
+
+        /* The value returned is the event group value prior to the bits being
+         * cleared. */
+        uxReturn = pxEventBits->uxEventBits;
+
+        /* Clear the bits. */
+        pxEventBits->uxEventBits &= ~uxBitsToClear;
+    }
+    taskEXIT_CRITICAL();
+
+    return uxReturn;
+}
+/*-----------------------------------------------------------*/
+
+#if ( ( configUSE_TRACE_FACILITY == 1 ) && ( INCLUDE_xTimerPendFunctionCall == 1 ) && ( configUSE_TIMERS == 1 ) )
+
+    BaseType_t xEventGroupClearBitsFromISR( EventGroupHandle_t xEventGroup,
+                                            const EventBits_t uxBitsToClear )
+    {
+        BaseType_t xReturn;
+
+        traceEVENT_GROUP_CLEAR_BITS_FROM_ISR( xEventGroup, uxBitsToClear );
+        xReturn = xTimerPendFunctionCallFromISR( vEventGroupClearBitsCallback, ( void * ) xEventGroup, ( uint32_t ) uxBitsToClear, NULL ); /*lint !e9087 Can't avoid cast to void* as a generic callback function not specific to this use case. Callback casts back to original type so safe. */
+
+        return xReturn;
+    }
+
+#endif /* if ( ( configUSE_TRACE_FACILITY == 1 ) && ( INCLUDE_xTimerPendFunctionCall == 1 ) && ( configUSE_TIMERS == 1 ) ) */
+/*-----------------------------------------------------------*/
+
+EventBits_t xEventGroupGetBitsFromISR( EventGroupHandle_t xEventGroup )
+{
+    UBaseType_t uxSavedInterruptStatus;
+    EventGroup_t const * const pxEventBits = xEventGroup;
+    EventBits_t uxReturn;
+
+    uxSavedInterruptStatus = portSET_INTERRUPT_MASK_FROM_ISR();
+    {
+        uxReturn = pxEventBits->uxEventBits;
+    }
+    portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedInterruptStatus );
+
+    return uxReturn;
+} /*lint !e818 EventGroupHandle_t is a typedef used in other functions to so can't be pointer to const. */
+/*-----------------------------------------------------------*/
+
+EventBits_t xEventGroupSetBits( EventGroupHandle_t xEventGroup,
+                                const EventBits_t uxBitsToSet )
+{
+    ListItem_t * pxListItem, * pxNext;
+    ListItem_t const * pxListEnd;
+    List_t const * pxList;
+    EventBits_t uxBitsToClear = 0, uxBitsWaitedFor, uxControlBits;
+    EventGroup_t * pxEventBits = xEventGroup;
+    BaseType_t xMatchFound = pdFALSE;
+
+    /* Check the user is not attempting to set the bits used by the kernel
+     * itself. */
+    configASSERT( xEventGroup );
+    configASSERT( ( uxBitsToSet & eventEVENT_BITS_CONTROL_BYTES ) == 0 );
+
+    pxList = &( pxEventBits->xTasksWaitingForBits );
+    pxListEnd = listGET_END_MARKER( pxList ); /*lint !e826 !e740 !e9087 The mini list structure is used as the list end to save RAM.  This is checked and valid. */
+    vTaskSuspendAll();
+    {
+        traceEVENT_GROUP_SET_BITS( xEventGroup, uxBitsToSet );
+
+        pxListItem = listGET_HEAD_ENTRY( pxList );
+
+        /* Set the bits. */
+        pxEventBits->uxEventBits |= uxBitsToSet;
+
+        /* See if the new bit value should unblock any tasks. */
+        while( pxListItem != pxListEnd )
+        {
+            pxNext = listGET_NEXT( pxListItem );
+            uxBitsWaitedFor = listGET_LIST_ITEM_VALUE( pxListItem );
+            xMatchFound = pdFALSE;
+
+            /* Split the bits waited for from the control bits. */
+            uxControlBits = uxBitsWaitedFor & eventEVENT_BITS_CONTROL_BYTES;
+            uxBitsWaitedFor &= ~eventEVENT_BITS_CONTROL_BYTES;
+
+            if( ( uxControlBits & eventWAIT_FOR_ALL_BITS ) == ( EventBits_t ) 0 )
+            {
+                /* Just looking for single bit being set. */
+                if( ( uxBitsWaitedFor & pxEventBits->uxEventBits ) != ( EventBits_t ) 0 )
+                {
+                    xMatchFound = pdTRUE;
+                }
+                else
+                {
+                    mtCOVERAGE_TEST_MARKER();
+                }
+            }
+            else if( ( uxBitsWaitedFor & pxEventBits->uxEventBits ) == uxBitsWaitedFor )
+            {
+                /* All bits are set. */
+                xMatchFound = pdTRUE;
+            }
+            else
+            {
+                /* Need all bits to be set, but not all the bits were set. */
+            }
+
+            if( xMatchFound != pdFALSE )
+            {
+                /* The bits match.  Should the bits be cleared on exit? */
+                if( ( uxControlBits & eventCLEAR_EVENTS_ON_EXIT_BIT ) != ( EventBits_t ) 0 )
+                {
+                    uxBitsToClear |= uxBitsWaitedFor;
+                }
+                else
+                {
+                    mtCOVERAGE_TEST_MARKER();
+                }
+
+                /* Store the actual event flag value in the task's event list
+                 * item before removing the task from the event list.  The
+                 * eventUNBLOCKED_DUE_TO_BIT_SET bit is set so the task knows
+                 * that is was unblocked due to its required bits matching, rather
+                 * than because it timed out. */
+                vTaskRemoveFromUnorderedEventList( pxListItem, pxEventBits->uxEventBits | eventUNBLOCKED_DUE_TO_BIT_SET );
+            }
+
+            /* Move onto the next list item.  Note pxListItem->pxNext is not
+             * used here as the list item may have been removed from the event list
+             * and inserted into the ready/pending reading list. */
+            pxListItem = pxNext;
+        }
+
+        /* Clear any bits that matched when the eventCLEAR_EVENTS_ON_EXIT_BIT
+         * bit was set in the control word. */
+        pxEventBits->uxEventBits &= ~uxBitsToClear;
+    }
+    ( void ) xTaskResumeAll();
+
+    return pxEventBits->uxEventBits;
+}
+/*-----------------------------------------------------------*/
+
+void vEventGroupDelete( EventGroupHandle_t xEventGroup )
+{
+    EventGroup_t * pxEventBits = xEventGroup;
+    const List_t * pxTasksWaitingForBits;
+
+    configASSERT( pxEventBits );
+
+    pxTasksWaitingForBits = &( pxEventBits->xTasksWaitingForBits );
+
+    vTaskSuspendAll();
+    {
+        traceEVENT_GROUP_DELETE( xEventGroup );
+
+        while( listCURRENT_LIST_LENGTH( pxTasksWaitingForBits ) > ( UBaseType_t ) 0 )
+        {
+            /* Unblock the task, returning 0 as the event list is being deleted
+             * and cannot therefore have any bits set. */
+            configASSERT( pxTasksWaitingForBits->xListEnd.pxNext != ( const ListItem_t * ) &( pxTasksWaitingForBits->xListEnd ) );
+            vTaskRemoveFromUnorderedEventList( pxTasksWaitingForBits->xListEnd.pxNext, eventUNBLOCKED_DUE_TO_BIT_SET );
+        }
+
+        #if ( ( configSUPPORT_DYNAMIC_ALLOCATION == 1 ) && ( configSUPPORT_STATIC_ALLOCATION == 0 ) )
+            {
+                /* The event group can only have been allocated dynamically - free
+                 * it again. */
+                vPortFree( pxEventBits );
+            }
+        #elif ( ( configSUPPORT_DYNAMIC_ALLOCATION == 1 ) && ( configSUPPORT_STATIC_ALLOCATION == 1 ) )
+            {
+                /* The event group could have been allocated statically or
+                 * dynamically, so check before attempting to free the memory. */
+                if( pxEventBits->ucStaticallyAllocated == ( uint8_t ) pdFALSE )
+                {
+                    vPortFree( pxEventBits );
+                }
+                else
+                {
+                    mtCOVERAGE_TEST_MARKER();
+                }
+            }
+        #endif /* configSUPPORT_DYNAMIC_ALLOCATION */
+    }
+    ( void ) xTaskResumeAll();
+}
+/*-----------------------------------------------------------*/
+
+/* For internal use only - execute a 'set bits' command that was pended from
+ * an interrupt. */
+void vEventGroupSetBitsCallback( void * pvEventGroup,
+                                 const uint32_t ulBitsToSet )
+{
+    ( void ) xEventGroupSetBits( pvEventGroup, ( EventBits_t ) ulBitsToSet ); /*lint !e9079 Can't avoid cast to void* as a generic timer callback prototype. Callback casts back to original type so safe. */
+}
+/*-----------------------------------------------------------*/
+
+/* For internal use only - execute a 'clear bits' command that was pended from
+ * an interrupt. */
+void vEventGroupClearBitsCallback( void * pvEventGroup,
+                                   const uint32_t ulBitsToClear )
+{
+    ( void ) xEventGroupClearBits( pvEventGroup, ( EventBits_t ) ulBitsToClear ); /*lint !e9079 Can't avoid cast to void* as a generic timer callback prototype. Callback casts back to original type so safe. */
+}
+/*-----------------------------------------------------------*/
+
+static BaseType_t prvTestWaitCondition( const EventBits_t uxCurrentEventBits,
+                                        const EventBits_t uxBitsToWaitFor,
+                                        const BaseType_t xWaitForAllBits )
+{
+    BaseType_t xWaitConditionMet = pdFALSE;
+
+    if( xWaitForAllBits == pdFALSE )
+    {
+        /* Task only has to wait for one bit within uxBitsToWaitFor to be
+         * set.  Is one already set? */
+        if( ( uxCurrentEventBits & uxBitsToWaitFor ) != ( EventBits_t ) 0 )
+        {
+            xWaitConditionMet = pdTRUE;
+        }
+        else
+        {
+            mtCOVERAGE_TEST_MARKER();
+        }
+    }
+    else
+    {
+        /* Task has to wait for all the bits in uxBitsToWaitFor to be set.
+         * Are they set already? */
+        if( ( uxCurrentEventBits & uxBitsToWaitFor ) == uxBitsToWaitFor )
+        {
+            xWaitConditionMet = pdTRUE;
+        }
+        else
+        {
+            mtCOVERAGE_TEST_MARKER();
+        }
+    }
+
+    return xWaitConditionMet;
+}
+/*-----------------------------------------------------------*/
+
+#if ( ( configUSE_TRACE_FACILITY == 1 ) && ( INCLUDE_xTimerPendFunctionCall == 1 ) && ( configUSE_TIMERS == 1 ) )
+
+    BaseType_t xEventGroupSetBitsFromISR( EventGroupHandle_t xEventGroup,
+                                          const EventBits_t uxBitsToSet,
+                                          BaseType_t * pxHigherPriorityTaskWoken )
+    {
+        BaseType_t xReturn;
+
+        traceEVENT_GROUP_SET_BITS_FROM_ISR( xEventGroup, uxBitsToSet );
+        xReturn = xTimerPendFunctionCallFromISR( vEventGroupSetBitsCallback, ( void * ) xEventGroup, ( uint32_t ) uxBitsToSet, pxHigherPriorityTaskWoken ); /*lint !e9087 Can't avoid cast to void* as a generic callback function not specific to this use case. Callback casts back to original type so safe. */
+
+        return xReturn;
+    }
+
+#endif /* if ( ( configUSE_TRACE_FACILITY == 1 ) && ( INCLUDE_xTimerPendFunctionCall == 1 ) && ( configUSE_TIMERS == 1 ) ) */
+/*-----------------------------------------------------------*/
+
+#if ( configUSE_TRACE_FACILITY == 1 )
+
+    UBaseType_t uxEventGroupGetNumber( void * xEventGroup )
+    {
+        UBaseType_t xReturn;
+        EventGroup_t const * pxEventBits = ( EventGroup_t * ) xEventGroup; /*lint !e9087 !e9079 EventGroupHandle_t is a pointer to an EventGroup_t, but EventGroupHandle_t is kept opaque outside of this file for data hiding purposes. */
+
+        if( xEventGroup == NULL )
+        {
+            xReturn = 0;
+        }
+        else
+        {
+            xReturn = pxEventBits->uxEventGroupNumber;
+        }
+
+        return xReturn;
+    }
+
+#endif /* configUSE_TRACE_FACILITY */
+/*-----------------------------------------------------------*/
+
+#if ( configUSE_TRACE_FACILITY == 1 )
+
+    void vEventGroupSetNumber( void * xEventGroup,
+                               UBaseType_t uxEventGroupNumber )
+    {
+        ( ( EventGroup_t * ) xEventGroup )->uxEventGroupNumber = uxEventGroupNumber; /*lint !e9087 !e9079 EventGroupHandle_t is a pointer to an EventGroup_t, but EventGroupHandle_t is kept opaque outside of this file for data hiding purposes. */
+    }
+
+#endif /* configUSE_TRACE_FACILITY */
+/*-----------------------------------------------------------*/

prj/TCPClient/FreeRTOS/include/StackMacros.h

@@ -0,0 +1,34 @@
+/*
+ * FreeRTOS Kernel V10.4.6
+ * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * https://www.FreeRTOS.org
+ * https://github.com/FreeRTOS
+ *
+ */
+
+
+#ifndef _MSC_VER /* Visual Studio doesn't support #warning. */
+    #warning The name of this file has changed to stack_macros.h.  Please update your code accordingly.  This source file (which has the original name) will be removed in future released.
+#endif
+
+#include "stack_macros.h"

prj/TCPClient/FreeRTOS/include/atomic.h

@@ -0,0 +1,419 @@
+/*
+ * FreeRTOS Kernel V10.4.6
+ * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * https://www.FreeRTOS.org
+ * https://github.com/FreeRTOS
+ *
+ */
+
+/**
+ * @file atomic.h
+ * @brief FreeRTOS atomic operation support.
+ *
+ * This file implements atomic functions by disabling interrupts globally.
+ * Implementations with architecture specific atomic instructions can be
+ * provided under each compiler directory.
+ */
+
+#ifndef ATOMIC_H
+#define ATOMIC_H
+
+#ifndef INC_FREERTOS_H
+    #error "include FreeRTOS.h must appear in source files before include atomic.h"
+#endif
+
+/* Standard includes. */
+#include <stdint.h>
+
+/* *INDENT-OFF* */
+#ifdef __cplusplus
+    extern "C" {
+#endif
+/* *INDENT-ON* */
+
+/*
+ * Port specific definitions -- entering/exiting critical section.
+ * Refer template -- ./lib/FreeRTOS/portable/Compiler/Arch/portmacro.h
+ *
+ * Every call to ATOMIC_EXIT_CRITICAL() must be closely paired with
+ * ATOMIC_ENTER_CRITICAL().
+ *
+ */
+#if defined( portSET_INTERRUPT_MASK_FROM_ISR )
+
+/* Nested interrupt scheme is supported in this port. */
+    #define ATOMIC_ENTER_CRITICAL() \
+    UBaseType_t uxCriticalSectionType = portSET_INTERRUPT_MASK_FROM_ISR()
+
+    #define ATOMIC_EXIT_CRITICAL() \
+    portCLEAR_INTERRUPT_MASK_FROM_ISR( uxCriticalSectionType )
+
+#else
+
+/* Nested interrupt scheme is NOT supported in this port. */
+    #define ATOMIC_ENTER_CRITICAL()    portENTER_CRITICAL()
+    #define ATOMIC_EXIT_CRITICAL()     portEXIT_CRITICAL()
+
+#endif /* portSET_INTERRUPT_MASK_FROM_ISR() */
+
+/*
+ * Port specific definition -- "always inline".
+ * Inline is compiler specific, and may not always get inlined depending on your
+ * optimization level.  Also, inline is considered as performance optimization
+ * for atomic.  Thus, if portFORCE_INLINE is not provided by portmacro.h,
+ * instead of resulting error, simply define it away.
+ */
+#ifndef portFORCE_INLINE
+    #define portFORCE_INLINE
+#endif
+
+#define ATOMIC_COMPARE_AND_SWAP_SUCCESS    0x1U     /**< Compare and swap succeeded, swapped. */
+#define ATOMIC_COMPARE_AND_SWAP_FAILURE    0x0U     /**< Compare and swap failed, did not swap. */
+
+/*----------------------------- Swap && CAS ------------------------------*/
+
+/**
+ * Atomic compare-and-swap
+ *
+ * @brief Performs an atomic compare-and-swap operation on the specified values.
+ *
+ * @param[in, out] pulDestination  Pointer to memory location from where value is
+ *                               to be loaded and checked.
+ * @param[in] ulExchange         If condition meets, write this value to memory.
+ * @param[in] ulComparand        Swap condition.
+ *
+ * @return Unsigned integer of value 1 or 0. 1 for swapped, 0 for not swapped.
+ *
+ * @note This function only swaps *pulDestination with ulExchange, if previous
+ *       *pulDestination value equals ulComparand.
+ */
+static portFORCE_INLINE uint32_t Atomic_CompareAndSwap_u32( uint32_t volatile * pulDestination,
+                                                            uint32_t ulExchange,
+                                                            uint32_t ulComparand )
+{
+    uint32_t ulReturnValue;
+
+    ATOMIC_ENTER_CRITICAL();
+    {
+        if( *pulDestination == ulComparand )
+        {
+            *pulDestination = ulExchange;
+            ulReturnValue = ATOMIC_COMPARE_AND_SWAP_SUCCESS;
+        }
+        else
+        {
+            ulReturnValue = ATOMIC_COMPARE_AND_SWAP_FAILURE;
+        }
+    }
+    ATOMIC_EXIT_CRITICAL();
+
+    return ulReturnValue;
+}
+/*-----------------------------------------------------------*/
+
+/**
+ * Atomic swap (pointers)
+ *
+ * @brief Atomically sets the address pointed to by *ppvDestination to the value
+ *        of *pvExchange.
+ *
+ * @param[in, out] ppvDestination  Pointer to memory location from where a pointer
+ *                                 value is to be loaded and written back to.
+ * @param[in] pvExchange           Pointer value to be written to *ppvDestination.
+ *
+ * @return The initial value of *ppvDestination.
+ */
+static portFORCE_INLINE void * Atomic_SwapPointers_p32( void * volatile * ppvDestination,
+                                                        void * pvExchange )
+{
+    void * pReturnValue;
+
+    ATOMIC_ENTER_CRITICAL();
+    {
+        pReturnValue = *ppvDestination;
+        *ppvDestination = pvExchange;
+    }
+    ATOMIC_EXIT_CRITICAL();
+
+    return pReturnValue;
+}
+/*-----------------------------------------------------------*/
+
+/**
+ * Atomic compare-and-swap (pointers)
+ *
+ * @brief Performs an atomic compare-and-swap operation on the specified pointer
+ *        values.
+ *
+ * @param[in, out] ppvDestination  Pointer to memory location from where a pointer
+ *                                 value is to be loaded and checked.
+ * @param[in] pvExchange           If condition meets, write this value to memory.
+ * @param[in] pvComparand          Swap condition.
+ *
+ * @return Unsigned integer of value 1 or 0. 1 for swapped, 0 for not swapped.
+ *
+ * @note This function only swaps *ppvDestination with pvExchange, if previous
+ *       *ppvDestination value equals pvComparand.
+ */
+static portFORCE_INLINE uint32_t Atomic_CompareAndSwapPointers_p32( void * volatile * ppvDestination,
+                                                                    void * pvExchange,
+                                                                    void * pvComparand )
+{
+    uint32_t ulReturnValue = ATOMIC_COMPARE_AND_SWAP_FAILURE;
+
+    ATOMIC_ENTER_CRITICAL();
+    {
+        if( *ppvDestination == pvComparand )
+        {
+            *ppvDestination = pvExchange;
+            ulReturnValue = ATOMIC_COMPARE_AND_SWAP_SUCCESS;
+        }
+    }
+    ATOMIC_EXIT_CRITICAL();
+
+    return ulReturnValue;
+}
+
+
+/*----------------------------- Arithmetic ------------------------------*/
+
+/**
+ * Atomic add
+ *
+ * @brief Atomically adds count to the value of the specified pointer points to.
+ *
+ * @param[in,out] pulAddend  Pointer to memory location from where value is to be
+ *                         loaded and written back to.
+ * @param[in] ulCount      Value to be added to *pulAddend.
+ *
+ * @return previous *pulAddend value.
+ */
+static portFORCE_INLINE uint32_t Atomic_Add_u32( uint32_t volatile * pulAddend,
+                                                 uint32_t ulCount )
+{
+    uint32_t ulCurrent;
+
+    ATOMIC_ENTER_CRITICAL();
+    {
+        ulCurrent = *pulAddend;
+        *pulAddend += ulCount;
+    }
+    ATOMIC_EXIT_CRITICAL();
+
+    return ulCurrent;
+}
+/*-----------------------------------------------------------*/
+
+/**
+ * Atomic subtract
+ *
+ * @brief Atomically subtracts count from the value of the specified pointer
+ *        pointers to.
+ *
+ * @param[in,out] pulAddend  Pointer to memory location from where value is to be
+ *                         loaded and written back to.
+ * @param[in] ulCount      Value to be subtract from *pulAddend.
+ *
+ * @return previous *pulAddend value.
+ */
+static portFORCE_INLINE uint32_t Atomic_Subtract_u32( uint32_t volatile * pulAddend,
+                                                      uint32_t ulCount )
+{
+    uint32_t ulCurrent;
+
+    ATOMIC_ENTER_CRITICAL();
+    {
+        ulCurrent = *pulAddend;
+        *pulAddend -= ulCount;
+    }
+    ATOMIC_EXIT_CRITICAL();
+
+    return ulCurrent;
+}
+/*-----------------------------------------------------------*/
+
+/**
+ * Atomic increment
+ *
+ * @brief Atomically increments the value of the specified pointer points to.
+ *
+ * @param[in,out] pulAddend  Pointer to memory location from where value is to be
+ *                         loaded and written back to.
+ *
+ * @return *pulAddend value before increment.
+ */
+static portFORCE_INLINE uint32_t Atomic_Increment_u32( uint32_t volatile * pulAddend )
+{
+    uint32_t ulCurrent;
+
+    ATOMIC_ENTER_CRITICAL();
+    {
+        ulCurrent = *pulAddend;
+        *pulAddend += 1;
+    }
+    ATOMIC_EXIT_CRITICAL();
+
+    return ulCurrent;
+}
+/*-----------------------------------------------------------*/
+
+/**
+ * Atomic decrement
+ *
+ * @brief Atomically decrements the value of the specified pointer points to
+ *
+ * @param[in,out] pulAddend  Pointer to memory location from where value is to be
+ *                         loaded and written back to.
+ *
+ * @return *pulAddend value before decrement.
+ */
+static portFORCE_INLINE uint32_t Atomic_Decrement_u32( uint32_t volatile * pulAddend )
+{
+    uint32_t ulCurrent;
+
+    ATOMIC_ENTER_CRITICAL();
+    {
+        ulCurrent = *pulAddend;
+        *pulAddend -= 1;
+    }
+    ATOMIC_EXIT_CRITICAL();
+
+    return ulCurrent;
+}
+
+/*----------------------------- Bitwise Logical ------------------------------*/
+
+/**
+ * Atomic OR
+ *
+ * @brief Performs an atomic OR operation on the specified values.
+ *
+ * @param [in, out] pulDestination  Pointer to memory location from where value is
+ *                                to be loaded and written back to.
+ * @param [in] ulValue            Value to be ORed with *pulDestination.
+ *
+ * @return The original value of *pulDestination.
+ */
+static portFORCE_INLINE uint32_t Atomic_OR_u32( uint32_t volatile * pulDestination,
+                                                uint32_t ulValue )
+{
+    uint32_t ulCurrent;
+
+    ATOMIC_ENTER_CRITICAL();
+    {
+        ulCurrent = *pulDestination;
+        *pulDestination |= ulValue;
+    }
+    ATOMIC_EXIT_CRITICAL();
+
+    return ulCurrent;
+}
+/*-----------------------------------------------------------*/
+
+/**
+ * Atomic AND
+ *
+ * @brief Performs an atomic AND operation on the specified values.
+ *
+ * @param [in, out] pulDestination  Pointer to memory location from where value is
+ *                                to be loaded and written back to.
+ * @param [in] ulValue            Value to be ANDed with *pulDestination.
+ *
+ * @return The original value of *pulDestination.
+ */
+static portFORCE_INLINE uint32_t Atomic_AND_u32( uint32_t volatile * pulDestination,
+                                                 uint32_t ulValue )
+{
+    uint32_t ulCurrent;
+
+    ATOMIC_ENTER_CRITICAL();
+    {
+        ulCurrent = *pulDestination;
+        *pulDestination &= ulValue;
+    }
+    ATOMIC_EXIT_CRITICAL();
+
+    return ulCurrent;
+}
+/*-----------------------------------------------------------*/
+
+/**
+ * Atomic NAND
+ *
+ * @brief Performs an atomic NAND operation on the specified values.
+ *
+ * @param [in, out] pulDestination  Pointer to memory location from where value is
+ *                                to be loaded and written back to.
+ * @param [in] ulValue            Value to be NANDed with *pulDestination.
+ *
+ * @return The original value of *pulDestination.
+ */
+static portFORCE_INLINE uint32_t Atomic_NAND_u32( uint32_t volatile * pulDestination,
+                                                  uint32_t ulValue )
+{
+    uint32_t ulCurrent;
+
+    ATOMIC_ENTER_CRITICAL();
+    {
+        ulCurrent = *pulDestination;
+        *pulDestination = ~( ulCurrent & ulValue );
+    }
+    ATOMIC_EXIT_CRITICAL();
+
+    return ulCurrent;
+}
+/*-----------------------------------------------------------*/
+
+/**
+ * Atomic XOR
+ *
+ * @brief Performs an atomic XOR operation on the specified values.
+ *
+ * @param [in, out] pulDestination  Pointer to memory location from where value is
+ *                                to be loaded and written back to.
+ * @param [in] ulValue            Value to be XORed with *pulDestination.
+ *
+ * @return The original value of *pulDestination.
+ */
+static portFORCE_INLINE uint32_t Atomic_XOR_u32( uint32_t volatile * pulDestination,
+                                                 uint32_t ulValue )
+{
+    uint32_t ulCurrent;
+
+    ATOMIC_ENTER_CRITICAL();
+    {
+        ulCurrent = *pulDestination;
+        *pulDestination ^= ulValue;
+    }
+    ATOMIC_EXIT_CRITICAL();
+
+    return ulCurrent;
+}
+
+/* *INDENT-OFF* */
+#ifdef __cplusplus
+    }
+#endif
+/* *INDENT-ON* */
+
+#endif /* ATOMIC_H */

prj/TCPClient/FreeRTOS/include/croutine.h

@@ -0,0 +1,753 @@
+/*
+ * FreeRTOS Kernel V10.4.6
+ * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * https://www.FreeRTOS.org
+ * https://github.com/FreeRTOS
+ *
+ */
+
+#ifndef CO_ROUTINE_H
+#define CO_ROUTINE_H
+
+#ifndef INC_FREERTOS_H
+    #error "include FreeRTOS.h must appear in source files before include croutine.h"
+#endif
+
+#include "list.h"
+
+/* *INDENT-OFF* */
+#ifdef __cplusplus
+    extern "C" {
+#endif
+/* *INDENT-ON* */
+
+/* Used to hide the implementation of the co-routine control block.  The
+ * control block structure however has to be included in the header due to
+ * the macro implementation of the co-routine functionality. */
+typedef void * CoRoutineHandle_t;
+
+/* Defines the prototype to which co-routine functions must conform. */
+typedef void (* crCOROUTINE_CODE)( CoRoutineHandle_t,
+                                   UBaseType_t );
+
+typedef struct corCoRoutineControlBlock
+{
+    crCOROUTINE_CODE pxCoRoutineFunction;
+    ListItem_t xGenericListItem; /*< List item used to place the CRCB in ready and blocked queues. */
+    ListItem_t xEventListItem;   /*< List item used to place the CRCB in event lists. */
+    UBaseType_t uxPriority;      /*< The priority of the co-routine in relation to other co-routines. */
+    UBaseType_t uxIndex;         /*< Used to distinguish between co-routines when multiple co-routines use the same co-routine function. */
+    uint16_t uxState;            /*< Used internally by the co-routine implementation. */
+} CRCB_t;                        /* Co-routine control block.  Note must be identical in size down to uxPriority with TCB_t. */
+
+/**
+ * croutine. h
+ * @code{c}
+ * BaseType_t xCoRoutineCreate(
+ *                               crCOROUTINE_CODE pxCoRoutineCode,
+ *                               UBaseType_t uxPriority,
+ *                               UBaseType_t uxIndex
+ *                             );
+ * @endcode
+ *
+ * Create a new co-routine and add it to the list of co-routines that are
+ * ready to run.
+ *
+ * @param pxCoRoutineCode Pointer to the co-routine function.  Co-routine
+ * functions require special syntax - see the co-routine section of the WEB
+ * documentation for more information.
+ *
+ * @param uxPriority The priority with respect to other co-routines at which
+ *  the co-routine will run.
+ *
+ * @param uxIndex Used to distinguish between different co-routines that
+ * execute the same function.  See the example below and the co-routine section
+ * of the WEB documentation for further information.
+ *
+ * @return pdPASS if the co-routine was successfully created and added to a ready
+ * list, otherwise an error code defined with ProjDefs.h.
+ *
+ * Example usage:
+ * @code{c}
+ * // Co-routine to be created.
+ * void vFlashCoRoutine( CoRoutineHandle_t xHandle, UBaseType_t uxIndex )
+ * {
+ * // Variables in co-routines must be declared static if they must maintain value across a blocking call.
+ * // This may not be necessary for const variables.
+ * static const char cLedToFlash[ 2 ] = { 5, 6 };
+ * static const TickType_t uxFlashRates[ 2 ] = { 200, 400 };
+ *
+ *   // Must start every co-routine with a call to crSTART();
+ *   crSTART( xHandle );
+ *
+ *   for( ;; )
+ *   {
+ *       // This co-routine just delays for a fixed period, then toggles
+ *       // an LED.  Two co-routines are created using this function, so
+ *       // the uxIndex parameter is used to tell the co-routine which
+ *       // LED to flash and how int32_t to delay.  This assumes xQueue has
+ *       // already been created.
+ *       vParTestToggleLED( cLedToFlash[ uxIndex ] );
+ *       crDELAY( xHandle, uxFlashRates[ uxIndex ] );
+ *   }
+ *
+ *   // Must end every co-routine with a call to crEND();
+ *   crEND();
+ * }
+ *
+ * // Function that creates two co-routines.
+ * void vOtherFunction( void )
+ * {
+ * uint8_t ucParameterToPass;
+ * TaskHandle_t xHandle;
+ *
+ *   // Create two co-routines at priority 0.  The first is given index 0
+ *   // so (from the code above) toggles LED 5 every 200 ticks.  The second
+ *   // is given index 1 so toggles LED 6 every 400 ticks.
+ *   for( uxIndex = 0; uxIndex < 2; uxIndex++ )
+ *   {
+ *       xCoRoutineCreate( vFlashCoRoutine, 0, uxIndex );
+ *   }
+ * }
+ * @endcode
+ * \defgroup xCoRoutineCreate xCoRoutineCreate
+ * \ingroup Tasks
+ */
+BaseType_t xCoRoutineCreate( crCOROUTINE_CODE pxCoRoutineCode,
+                             UBaseType_t uxPriority,
+                             UBaseType_t uxIndex );
+
+
+/**
+ * croutine. h
+ * @code{c}
+ * void vCoRoutineSchedule( void );
+ * @endcode
+ *
+ * Run a co-routine.
+ *
+ * vCoRoutineSchedule() executes the highest priority co-routine that is able
+ * to run.  The co-routine will execute until it either blocks, yields or is
+ * preempted by a task.  Co-routines execute cooperatively so one
+ * co-routine cannot be preempted by another, but can be preempted by a task.
+ *
+ * If an application comprises of both tasks and co-routines then
+ * vCoRoutineSchedule should be called from the idle task (in an idle task
+ * hook).
+ *
+ * Example usage:
+ * @code{c}
+ * // This idle task hook will schedule a co-routine each time it is called.
+ * // The rest of the idle task will execute between co-routine calls.
+ * void vApplicationIdleHook( void )
+ * {
+ *  vCoRoutineSchedule();
+ * }
+ *
+ * // Alternatively, if you do not require any other part of the idle task to
+ * // execute, the idle task hook can call vCoRoutineSchedule() within an
+ * // infinite loop.
+ * void vApplicationIdleHook( void )
+ * {
+ *  for( ;; )
+ *  {
+ *      vCoRoutineSchedule();
+ *  }
+ * }
+ * @endcode
+ * \defgroup vCoRoutineSchedule vCoRoutineSchedule
+ * \ingroup Tasks
+ */
+void vCoRoutineSchedule( void );
+
+/**
+ * croutine. h
+ * @code{c}
+ * crSTART( CoRoutineHandle_t xHandle );
+ * @endcode
+ *
+ * This macro MUST always be called at the start of a co-routine function.
+ *
+ * Example usage:
+ * @code{c}
+ * // Co-routine to be created.
+ * void vACoRoutine( CoRoutineHandle_t xHandle, UBaseType_t uxIndex )
+ * {
+ * // Variables in co-routines must be declared static if they must maintain value across a blocking call.
+ * static int32_t ulAVariable;
+ *
+ *   // Must start every co-routine with a call to crSTART();
+ *   crSTART( xHandle );
+ *
+ *   for( ;; )
+ *   {
+ *        // Co-routine functionality goes here.
+ *   }
+ *
+ *   // Must end every co-routine with a call to crEND();
+ *   crEND();
+ * }
+ * @endcode
+ * \defgroup crSTART crSTART
+ * \ingroup Tasks
+ */
+#define crSTART( pxCRCB )                            \
+    switch( ( ( CRCB_t * ) ( pxCRCB ) )->uxState ) { \
+        case 0:
+
+/**
+ * croutine. h
+ * @code{c}
+ * crEND();
+ * @endcode
+ *
+ * This macro MUST always be called at the end of a co-routine function.
+ *
+ * Example usage:
+ * @code{c}
+ * // Co-routine to be created.
+ * void vACoRoutine( CoRoutineHandle_t xHandle, UBaseType_t uxIndex )
+ * {
+ * // Variables in co-routines must be declared static if they must maintain value across a blocking call.
+ * static int32_t ulAVariable;
+ *
+ *   // Must start every co-routine with a call to crSTART();
+ *   crSTART( xHandle );
+ *
+ *   for( ;; )
+ *   {
+ *        // Co-routine functionality goes here.
+ *   }
+ *
+ *   // Must end every co-routine with a call to crEND();
+ *   crEND();
+ * }
+ * @endcode
+ * \defgroup crSTART crSTART
+ * \ingroup Tasks
+ */
+#define crEND()    }
+
+/*
+ * These macros are intended for internal use by the co-routine implementation
+ * only.  The macros should not be used directly by application writers.
+ */
+#define crSET_STATE0( xHandle )                                       \
+    ( ( CRCB_t * ) ( xHandle ) )->uxState = ( __LINE__ * 2 ); return; \
+    case ( __LINE__ * 2 ):
+#define crSET_STATE1( xHandle )                                               \
+    ( ( CRCB_t * ) ( xHandle ) )->uxState = ( ( __LINE__ * 2 ) + 1 ); return; \
+    case ( ( __LINE__ * 2 ) + 1 ):
+
+/**
+ * croutine. h
+ * @code{c}
+ * crDELAY( CoRoutineHandle_t xHandle, TickType_t xTicksToDelay );
+ * @endcode
+ *
+ * Delay a co-routine for a fixed period of time.
+ *
+ * crDELAY can only be called from the co-routine function itself - not
+ * from within a function called by the co-routine function.  This is because
+ * co-routines do not maintain their own stack.
+ *
+ * @param xHandle The handle of the co-routine to delay.  This is the xHandle
+ * parameter of the co-routine function.
+ *
+ * @param xTickToDelay The number of ticks that the co-routine should delay
+ * for.  The actual amount of time this equates to is defined by
+ * configTICK_RATE_HZ (set in FreeRTOSConfig.h).  The constant portTICK_PERIOD_MS
+ * can be used to convert ticks to milliseconds.
+ *
+ * Example usage:
+ * @code{c}
+ * // Co-routine to be created.
+ * void vACoRoutine( CoRoutineHandle_t xHandle, UBaseType_t uxIndex )
+ * {
+ * // Variables in co-routines must be declared static if they must maintain value across a blocking call.
+ * // This may not be necessary for const variables.
+ * // We are to delay for 200ms.
+ * static const xTickType xDelayTime = 200 / portTICK_PERIOD_MS;
+ *
+ *   // Must start every co-routine with a call to crSTART();
+ *   crSTART( xHandle );
+ *
+ *   for( ;; )
+ *   {
+ *      // Delay for 200ms.
+ *      crDELAY( xHandle, xDelayTime );
+ *
+ *      // Do something here.
+ *   }
+ *
+ *   // Must end every co-routine with a call to crEND();
+ *   crEND();
+ * }
+ * @endcode
+ * \defgroup crDELAY crDELAY
+ * \ingroup Tasks
+ */
+#define crDELAY( xHandle, xTicksToDelay )                      \
+    if( ( xTicksToDelay ) > 0 )                                \
+    {                                                          \
+        vCoRoutineAddToDelayedList( ( xTicksToDelay ), NULL ); \
+    }                                                          \
+    crSET_STATE0( ( xHandle ) );
+
+/**
+ * @code{c}
+ * crQUEUE_SEND(
+ *                CoRoutineHandle_t xHandle,
+ *                QueueHandle_t pxQueue,
+ *                void *pvItemToQueue,
+ *                TickType_t xTicksToWait,
+ *                BaseType_t *pxResult
+ *           )
+ * @endcode
+ *
+ * The macro's crQUEUE_SEND() and crQUEUE_RECEIVE() are the co-routine
+ * equivalent to the xQueueSend() and xQueueReceive() functions used by tasks.
+ *
+ * crQUEUE_SEND and crQUEUE_RECEIVE can only be used from a co-routine whereas
+ * xQueueSend() and xQueueReceive() can only be used from tasks.
+ *
+ * crQUEUE_SEND can only be called from the co-routine function itself - not
+ * from within a function called by the co-routine function.  This is because
+ * co-routines do not maintain their own stack.
+ *
+ * See the co-routine section of the WEB documentation for information on
+ * passing data between tasks and co-routines and between ISR's and
+ * co-routines.
+ *
+ * @param xHandle The handle of the calling co-routine.  This is the xHandle
+ * parameter of the co-routine function.
+ *
+ * @param pxQueue The handle of the queue on which the data will be posted.
+ * The handle is obtained as the return value when the queue is created using
+ * the xQueueCreate() API function.
+ *
+ * @param pvItemToQueue A pointer to the data being posted onto the queue.
+ * The number of bytes of each queued item is specified when the queue is
+ * created.  This number of bytes is copied from pvItemToQueue into the queue
+ * itself.
+ *
+ * @param xTickToDelay The number of ticks that the co-routine should block
+ * to wait for space to become available on the queue, should space not be
+ * available immediately. The actual amount of time this equates to is defined
+ * by configTICK_RATE_HZ (set in FreeRTOSConfig.h).  The constant
+ * portTICK_PERIOD_MS can be used to convert ticks to milliseconds (see example
+ * below).
+ *
+ * @param pxResult The variable pointed to by pxResult will be set to pdPASS if
+ * data was successfully posted onto the queue, otherwise it will be set to an
+ * error defined within ProjDefs.h.
+ *
+ * Example usage:
+ * @code{c}
+ * // Co-routine function that blocks for a fixed period then posts a number onto
+ * // a queue.
+ * static void prvCoRoutineFlashTask( CoRoutineHandle_t xHandle, UBaseType_t uxIndex )
+ * {
+ * // Variables in co-routines must be declared static if they must maintain value across a blocking call.
+ * static BaseType_t xNumberToPost = 0;
+ * static BaseType_t xResult;
+ *
+ *  // Co-routines must begin with a call to crSTART().
+ *  crSTART( xHandle );
+ *
+ *  for( ;; )
+ *  {
+ *      // This assumes the queue has already been created.
+ *      crQUEUE_SEND( xHandle, xCoRoutineQueue, &xNumberToPost, NO_DELAY, &xResult );
+ *
+ *      if( xResult != pdPASS )
+ *      {
+ *          // The message was not posted!
+ *      }
+ *
+ *      // Increment the number to be posted onto the queue.
+ *      xNumberToPost++;
+ *
+ *      // Delay for 100 ticks.
+ *      crDELAY( xHandle, 100 );
+ *  }
+ *
+ *  // Co-routines must end with a call to crEND().
+ *  crEND();
+ * }
+ * @endcode
+ * \defgroup crQUEUE_SEND crQUEUE_SEND
+ * \ingroup Tasks
+ */
+#define crQUEUE_SEND( xHandle, pxQueue, pvItemToQueue, xTicksToWait, pxResult )           \
+    {                                                                                     \
+        *( pxResult ) = xQueueCRSend( ( pxQueue ), ( pvItemToQueue ), ( xTicksToWait ) ); \
+        if( *( pxResult ) == errQUEUE_BLOCKED )                                           \
+        {                                                                                 \
+            crSET_STATE0( ( xHandle ) );                                                  \
+            *pxResult = xQueueCRSend( ( pxQueue ), ( pvItemToQueue ), 0 );                \
+        }                                                                                 \
+        if( *pxResult == errQUEUE_YIELD )                                                 \
+        {                                                                                 \
+            crSET_STATE1( ( xHandle ) );                                                  \
+            *pxResult = pdPASS;                                                           \
+        }                                                                                 \
+    }
+
+/**
+ * croutine. h
+ * @code{c}
+ * crQUEUE_RECEIVE(
+ *                   CoRoutineHandle_t xHandle,
+ *                   QueueHandle_t pxQueue,
+ *                   void *pvBuffer,
+ *                   TickType_t xTicksToWait,
+ *                   BaseType_t *pxResult
+ *               )
+ * @endcode
+ *
+ * The macro's crQUEUE_SEND() and crQUEUE_RECEIVE() are the co-routine
+ * equivalent to the xQueueSend() and xQueueReceive() functions used by tasks.
+ *
+ * crQUEUE_SEND and crQUEUE_RECEIVE can only be used from a co-routine whereas
+ * xQueueSend() and xQueueReceive() can only be used from tasks.
+ *
+ * crQUEUE_RECEIVE can only be called from the co-routine function itself - not
+ * from within a function called by the co-routine function.  This is because
+ * co-routines do not maintain their own stack.
+ *
+ * See the co-routine section of the WEB documentation for information on
+ * passing data between tasks and co-routines and between ISR's and
+ * co-routines.
+ *
+ * @param xHandle The handle of the calling co-routine.  This is the xHandle
+ * parameter of the co-routine function.
+ *
+ * @param pxQueue The handle of the queue from which the data will be received.
+ * The handle is obtained as the return value when the queue is created using
+ * the xQueueCreate() API function.
+ *
+ * @param pvBuffer The buffer into which the received item is to be copied.
+ * The number of bytes of each queued item is specified when the queue is
+ * created.  This number of bytes is copied into pvBuffer.
+ *
+ * @param xTickToDelay The number of ticks that the co-routine should block
+ * to wait for data to become available from the queue, should data not be
+ * available immediately. The actual amount of time this equates to is defined
+ * by configTICK_RATE_HZ (set in FreeRTOSConfig.h).  The constant
+ * portTICK_PERIOD_MS can be used to convert ticks to milliseconds (see the
+ * crQUEUE_SEND example).
+ *
+ * @param pxResult The variable pointed to by pxResult will be set to pdPASS if
+ * data was successfully retrieved from the queue, otherwise it will be set to
+ * an error code as defined within ProjDefs.h.
+ *
+ * Example usage:
+ * @code{c}
+ * // A co-routine receives the number of an LED to flash from a queue.  It
+ * // blocks on the queue until the number is received.
+ * static void prvCoRoutineFlashWorkTask( CoRoutineHandle_t xHandle, UBaseType_t uxIndex )
+ * {
+ * // Variables in co-routines must be declared static if they must maintain value across a blocking call.
+ * static BaseType_t xResult;
+ * static UBaseType_t uxLEDToFlash;
+ *
+ *  // All co-routines must start with a call to crSTART().
+ *  crSTART( xHandle );
+ *
+ *  for( ;; )
+ *  {
+ *      // Wait for data to become available on the queue.
+ *      crQUEUE_RECEIVE( xHandle, xCoRoutineQueue, &uxLEDToFlash, portMAX_DELAY, &xResult );
+ *
+ *      if( xResult == pdPASS )
+ *      {
+ *          // We received the LED to flash - flash it!
+ *          vParTestToggleLED( uxLEDToFlash );
+ *      }
+ *  }
+ *
+ *  crEND();
+ * }
+ * @endcode
+ * \defgroup crQUEUE_RECEIVE crQUEUE_RECEIVE
+ * \ingroup Tasks
+ */
+#define crQUEUE_RECEIVE( xHandle, pxQueue, pvBuffer, xTicksToWait, pxResult )           \
+    {                                                                                   \
+        *( pxResult ) = xQueueCRReceive( ( pxQueue ), ( pvBuffer ), ( xTicksToWait ) ); \
+        if( *( pxResult ) == errQUEUE_BLOCKED )                                         \
+        {                                                                               \
+            crSET_STATE0( ( xHandle ) );                                                \
+            *( pxResult ) = xQueueCRReceive( ( pxQueue ), ( pvBuffer ), 0 );            \
+        }                                                                               \
+        if( *( pxResult ) == errQUEUE_YIELD )                                           \
+        {                                                                               \
+            crSET_STATE1( ( xHandle ) );                                                \
+            *( pxResult ) = pdPASS;                                                     \
+        }                                                                               \
+    }
+
+/**
+ * croutine. h
+ * @code{c}
+ * crQUEUE_SEND_FROM_ISR(
+ *                          QueueHandle_t pxQueue,
+ *                          void *pvItemToQueue,
+ *                          BaseType_t xCoRoutinePreviouslyWoken
+ *                     )
+ * @endcode
+ *
+ * The macro's crQUEUE_SEND_FROM_ISR() and crQUEUE_RECEIVE_FROM_ISR() are the
+ * co-routine equivalent to the xQueueSendFromISR() and xQueueReceiveFromISR()
+ * functions used by tasks.
+ *
+ * crQUEUE_SEND_FROM_ISR() and crQUEUE_RECEIVE_FROM_ISR() can only be used to
+ * pass data between a co-routine and and ISR, whereas xQueueSendFromISR() and
+ * xQueueReceiveFromISR() can only be used to pass data between a task and and
+ * ISR.
+ *
+ * crQUEUE_SEND_FROM_ISR can only be called from an ISR to send data to a queue
+ * that is being used from within a co-routine.
+ *
+ * See the co-routine section of the WEB documentation for information on
+ * passing data between tasks and co-routines and between ISR's and
+ * co-routines.
+ *
+ * @param xQueue The handle to the queue on which the item is to be posted.
+ *
+ * @param pvItemToQueue A pointer to the item that is to be placed on the
+ * queue.  The size of the items the queue will hold was defined when the
+ * queue was created, so this many bytes will be copied from pvItemToQueue
+ * into the queue storage area.
+ *
+ * @param xCoRoutinePreviouslyWoken This is included so an ISR can post onto
+ * the same queue multiple times from a single interrupt.  The first call
+ * should always pass in pdFALSE.  Subsequent calls should pass in
+ * the value returned from the previous call.
+ *
+ * @return pdTRUE if a co-routine was woken by posting onto the queue.  This is
+ * used by the ISR to determine if a context switch may be required following
+ * the ISR.
+ *
+ * Example usage:
+ * @code{c}
+ * // A co-routine that blocks on a queue waiting for characters to be received.
+ * static void vReceivingCoRoutine( CoRoutineHandle_t xHandle, UBaseType_t uxIndex )
+ * {
+ * char cRxedChar;
+ * BaseType_t xResult;
+ *
+ *   // All co-routines must start with a call to crSTART().
+ *   crSTART( xHandle );
+ *
+ *   for( ;; )
+ *   {
+ *       // Wait for data to become available on the queue.  This assumes the
+ *       // queue xCommsRxQueue has already been created!
+ *       crQUEUE_RECEIVE( xHandle, xCommsRxQueue, &uxLEDToFlash, portMAX_DELAY, &xResult );
+ *
+ *       // Was a character received?
+ *       if( xResult == pdPASS )
+ *       {
+ *           // Process the character here.
+ *       }
+ *   }
+ *
+ *   // All co-routines must end with a call to crEND().
+ *   crEND();
+ * }
+ *
+ * // An ISR that uses a queue to send characters received on a serial port to
+ * // a co-routine.
+ * void vUART_ISR( void )
+ * {
+ * char cRxedChar;
+ * BaseType_t xCRWokenByPost = pdFALSE;
+ *
+ *   // We loop around reading characters until there are none left in the UART.
+ *   while( UART_RX_REG_NOT_EMPTY() )
+ *   {
+ *       // Obtain the character from the UART.
+ *       cRxedChar = UART_RX_REG;
+ *
+ *       // Post the character onto a queue.  xCRWokenByPost will be pdFALSE
+ *       // the first time around the loop.  If the post causes a co-routine
+ *       // to be woken (unblocked) then xCRWokenByPost will be set to pdTRUE.
+ *       // In this manner we can ensure that if more than one co-routine is
+ *       // blocked on the queue only one is woken by this ISR no matter how
+ *       // many characters are posted to the queue.
+ *       xCRWokenByPost = crQUEUE_SEND_FROM_ISR( xCommsRxQueue, &cRxedChar, xCRWokenByPost );
+ *   }
+ * }
+ * @endcode
+ * \defgroup crQUEUE_SEND_FROM_ISR crQUEUE_SEND_FROM_ISR
+ * \ingroup Tasks
+ */
+#define crQUEUE_SEND_FROM_ISR( pxQueue, pvItemToQueue, xCoRoutinePreviouslyWoken ) \
+    xQueueCRSendFromISR( ( pxQueue ), ( pvItemToQueue ), ( xCoRoutinePreviouslyWoken ) )
+
+
+/**
+ * croutine. h
+ * @code{c}
+ * crQUEUE_SEND_FROM_ISR(
+ *                          QueueHandle_t pxQueue,
+ *                          void *pvBuffer,
+ *                          BaseType_t * pxCoRoutineWoken
+ *                     )
+ * @endcode
+ *
+ * The macro's crQUEUE_SEND_FROM_ISR() and crQUEUE_RECEIVE_FROM_ISR() are the
+ * co-routine equivalent to the xQueueSendFromISR() and xQueueReceiveFromISR()
+ * functions used by tasks.
+ *
+ * crQUEUE_SEND_FROM_ISR() and crQUEUE_RECEIVE_FROM_ISR() can only be used to
+ * pass data between a co-routine and and ISR, whereas xQueueSendFromISR() and
+ * xQueueReceiveFromISR() can only be used to pass data between a task and and
+ * ISR.
+ *
+ * crQUEUE_RECEIVE_FROM_ISR can only be called from an ISR to receive data
+ * from a queue that is being used from within a co-routine (a co-routine
+ * posted to the queue).
+ *
+ * See the co-routine section of the WEB documentation for information on
+ * passing data between tasks and co-routines and between ISR's and
+ * co-routines.
+ *
+ * @param xQueue The handle to the queue on which the item is to be posted.
+ *
+ * @param pvBuffer A pointer to a buffer into which the received item will be
+ * placed.  The size of the items the queue will hold was defined when the
+ * queue was created, so this many bytes will be copied from the queue into
+ * pvBuffer.
+ *
+ * @param pxCoRoutineWoken A co-routine may be blocked waiting for space to become
+ * available on the queue.  If crQUEUE_RECEIVE_FROM_ISR causes such a
+ * co-routine to unblock *pxCoRoutineWoken will get set to pdTRUE, otherwise
+ * *pxCoRoutineWoken will remain unchanged.
+ *
+ * @return pdTRUE an item was successfully received from the queue, otherwise
+ * pdFALSE.
+ *
+ * Example usage:
+ * @code{c}
+ * // A co-routine that posts a character to a queue then blocks for a fixed
+ * // period.  The character is incremented each time.
+ * static void vSendingCoRoutine( CoRoutineHandle_t xHandle, UBaseType_t uxIndex )
+ * {
+ * // cChar holds its value while this co-routine is blocked and must therefore
+ * // be declared static.
+ * static char cCharToTx = 'a';
+ * BaseType_t xResult;
+ *
+ *   // All co-routines must start with a call to crSTART().
+ *   crSTART( xHandle );
+ *
+ *   for( ;; )
+ *   {
+ *       // Send the next character to the queue.
+ *       crQUEUE_SEND( xHandle, xCoRoutineQueue, &cCharToTx, NO_DELAY, &xResult );
+ *
+ *       if( xResult == pdPASS )
+ *       {
+ *           // The character was successfully posted to the queue.
+ *       }
+ *       else
+ *       {
+ *          // Could not post the character to the queue.
+ *       }
+ *
+ *       // Enable the UART Tx interrupt to cause an interrupt in this
+ *       // hypothetical UART.  The interrupt will obtain the character
+ *       // from the queue and send it.
+ *       ENABLE_RX_INTERRUPT();
+ *
+ *       // Increment to the next character then block for a fixed period.
+ *       // cCharToTx will maintain its value across the delay as it is
+ *       // declared static.
+ *       cCharToTx++;
+ *       if( cCharToTx > 'x' )
+ *       {
+ *          cCharToTx = 'a';
+ *       }
+ *       crDELAY( 100 );
+ *   }
+ *
+ *   // All co-routines must end with a call to crEND().
+ *   crEND();
+ * }
+ *
+ * // An ISR that uses a queue to receive characters to send on a UART.
+ * void vUART_ISR( void )
+ * {
+ * char cCharToTx;
+ * BaseType_t xCRWokenByPost = pdFALSE;
+ *
+ *   while( UART_TX_REG_EMPTY() )
+ *   {
+ *       // Are there any characters in the queue waiting to be sent?
+ *       // xCRWokenByPost will automatically be set to pdTRUE if a co-routine
+ *       // is woken by the post - ensuring that only a single co-routine is
+ *       // woken no matter how many times we go around this loop.
+ *       if( crQUEUE_RECEIVE_FROM_ISR( pxQueue, &cCharToTx, &xCRWokenByPost ) )
+ *       {
+ *           SEND_CHARACTER( cCharToTx );
+ *       }
+ *   }
+ * }
+ * @endcode
+ * \defgroup crQUEUE_RECEIVE_FROM_ISR crQUEUE_RECEIVE_FROM_ISR
+ * \ingroup Tasks
+ */
+#define crQUEUE_RECEIVE_FROM_ISR( pxQueue, pvBuffer, pxCoRoutineWoken ) \
+    xQueueCRReceiveFromISR( ( pxQueue ), ( pvBuffer ), ( pxCoRoutineWoken ) )
+
+/*
+ * This function is intended for internal use by the co-routine macros only.
+ * The macro nature of the co-routine implementation requires that the
+ * prototype appears here.  The function should not be used by application
+ * writers.
+ *
+ * Removes the current co-routine from its ready list and places it in the
+ * appropriate delayed list.
+ */
+void vCoRoutineAddToDelayedList( TickType_t xTicksToDelay,
+                                 List_t * pxEventList );
+
+/*
+ * This function is intended for internal use by the queue implementation only.
+ * The function should not be used by application writers.
+ *
+ * Removes the highest priority co-routine from the event list and places it in
+ * the pending ready list.
+ */
+BaseType_t xCoRoutineRemoveFromEventList( const List_t * pxEventList );
+
+/* *INDENT-OFF* */
+#ifdef __cplusplus
+    }
+#endif
+/* *INDENT-ON* */
+
+#endif /* CO_ROUTINE_H */

prj/TCPClient/FreeRTOS/include/deprecated_definitions.h

@@ -0,0 +1,281 @@
+/*
+ * FreeRTOS Kernel V10.4.6
+ * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * https://www.FreeRTOS.org
+ * https://github.com/FreeRTOS
+ *
+ */
+
+#ifndef DEPRECATED_DEFINITIONS_H
+#define DEPRECATED_DEFINITIONS_H
+
+
+/* Each FreeRTOS port has a unique portmacro.h header file.  Originally a
+ * pre-processor definition was used to ensure the pre-processor found the correct
+ * portmacro.h file for the port being used.  That scheme was deprecated in favour
+ * of setting the compiler's include path such that it found the correct
+ * portmacro.h file - removing the need for the constant and allowing the
+ * portmacro.h file to be located anywhere in relation to the port being used.  The
+ * definitions below remain in the code for backward compatibility only.  New
+ * projects should not use them. */
+
+#ifdef OPEN_WATCOM_INDUSTRIAL_PC_PORT
+    #include "..\..\Source\portable\owatcom\16bitdos\pc\portmacro.h"
+    typedef void ( __interrupt __far * pxISR )();
+#endif
+
+#ifdef OPEN_WATCOM_FLASH_LITE_186_PORT
+    #include "..\..\Source\portable\owatcom\16bitdos\flsh186\portmacro.h"
+    typedef void ( __interrupt __far * pxISR )();
+#endif
+
+#ifdef GCC_MEGA_AVR
+    #include "../portable/GCC/ATMega323/portmacro.h"
+#endif
+
+#ifdef IAR_MEGA_AVR
+    #include "../portable/IAR/ATMega323/portmacro.h"
+#endif
+
+#ifdef MPLAB_PIC24_PORT
+    #include "../../Source/portable/MPLAB/PIC24_dsPIC/portmacro.h"
+#endif
+
+#ifdef MPLAB_DSPIC_PORT
+    #include "../../Source/portable/MPLAB/PIC24_dsPIC/portmacro.h"
+#endif
+
+#ifdef MPLAB_PIC18F_PORT
+    #include "../../Source/portable/MPLAB/PIC18F/portmacro.h"
+#endif
+
+#ifdef MPLAB_PIC32MX_PORT
+    #include "../../Source/portable/MPLAB/PIC32MX/portmacro.h"
+#endif
+
+#ifdef _FEDPICC
+    #include "libFreeRTOS/Include/portmacro.h"
+#endif
+
+#ifdef SDCC_CYGNAL
+    #include "../../Source/portable/SDCC/Cygnal/portmacro.h"
+#endif
+
+#ifdef GCC_ARM7
+    #include "../../Source/portable/GCC/ARM7_LPC2000/portmacro.h"
+#endif
+
+#ifdef GCC_ARM7_ECLIPSE
+    #include "portmacro.h"
+#endif
+
+#ifdef ROWLEY_LPC23xx
+    #include "../../Source/portable/GCC/ARM7_LPC23xx/portmacro.h"
+#endif
+
+#ifdef IAR_MSP430
+    #include "..\..\Source\portable\IAR\MSP430\portmacro.h"
+#endif
+
+#ifdef GCC_MSP430
+    #include "../../Source/portable/GCC/MSP430F449/portmacro.h"
+#endif
+
+#ifdef ROWLEY_MSP430
+    #include "../../Source/portable/Rowley/MSP430F449/portmacro.h"
+#endif
+
+#ifdef ARM7_LPC21xx_KEIL_RVDS
+    #include "..\..\Source\portable\RVDS\ARM7_LPC21xx\portmacro.h"
+#endif
+
+#ifdef SAM7_GCC
+    #include "../../Source/portable/GCC/ARM7_AT91SAM7S/portmacro.h"
+#endif
+
+#ifdef SAM7_IAR
+    #include "..\..\Source\portable\IAR\AtmelSAM7S64\portmacro.h"
+#endif
+
+#ifdef SAM9XE_IAR
+    #include "..\..\Source\portable\IAR\AtmelSAM9XE\portmacro.h"
+#endif
+
+#ifdef LPC2000_IAR
+    #include "..\..\Source\portable\IAR\LPC2000\portmacro.h"
+#endif
+
+#ifdef STR71X_IAR
+    #include "..\..\Source\portable\IAR\STR71x\portmacro.h"
+#endif
+
+#ifdef STR75X_IAR
+    #include "..\..\Source\portable\IAR\STR75x\portmacro.h"
+#endif
+
+#ifdef STR75X_GCC
+    #include "..\..\Source\portable\GCC\STR75x\portmacro.h"
+#endif
+
+#ifdef STR91X_IAR
+    #include "..\..\Source\portable\IAR\STR91x\portmacro.h"
+#endif
+
+#ifdef GCC_H8S
+    #include "../../Source/portable/GCC/H8S2329/portmacro.h"
+#endif
+
+#ifdef GCC_AT91FR40008
+    #include "../../Source/portable/GCC/ARM7_AT91FR40008/portmacro.h"
+#endif
+
+#ifdef RVDS_ARMCM3_LM3S102
+    #include "../../Source/portable/RVDS/ARM_CM3/portmacro.h"
+#endif
+
+#ifdef GCC_ARMCM3_LM3S102
+    #include "../../Source/portable/GCC/ARM_CM3/portmacro.h"
+#endif
+
+#ifdef GCC_ARMCM3
+    #include "../../Source/portable/GCC/ARM_CM3/portmacro.h"
+#endif
+
+#ifdef IAR_ARM_CM3
+    #include "../../Source/portable/IAR/ARM_CM3/portmacro.h"
+#endif
+
+#ifdef IAR_ARMCM3_LM
+    #include "../../Source/portable/IAR/ARM_CM3/portmacro.h"
+#endif
+
+#ifdef HCS12_CODE_WARRIOR
+    #include "../../Source/portable/CodeWarrior/HCS12/portmacro.h"
+#endif
+
+#ifdef MICROBLAZE_GCC
+    #include "../../Source/portable/GCC/MicroBlaze/portmacro.h"
+#endif
+
+#ifdef TERN_EE
+    #include "..\..\Source\portable\Paradigm\Tern_EE\small\portmacro.h"
+#endif
+
+#ifdef GCC_HCS12
+    #include "../../Source/portable/GCC/HCS12/portmacro.h"
+#endif
+
+#ifdef GCC_MCF5235
+    #include "../../Source/portable/GCC/MCF5235/portmacro.h"
+#endif
+
+#ifdef COLDFIRE_V2_GCC
+    #include "../../../Source/portable/GCC/ColdFire_V2/portmacro.h"
+#endif
+
+#ifdef COLDFIRE_V2_CODEWARRIOR
+    #include "../../Source/portable/CodeWarrior/ColdFire_V2/portmacro.h"
+#endif
+
+#ifdef GCC_PPC405
+    #include "../../Source/portable/GCC/PPC405_Xilinx/portmacro.h"
+#endif
+
+#ifdef GCC_PPC440
+    #include "../../Source/portable/GCC/PPC440_Xilinx/portmacro.h"
+#endif
+
+#ifdef _16FX_SOFTUNE
+    #include "..\..\Source\portable\Softune\MB96340\portmacro.h"
+#endif
+
+#ifdef BCC_INDUSTRIAL_PC_PORT
+
+/* A short file name has to be used in place of the normal
+ * FreeRTOSConfig.h when using the Borland compiler. */
+    #include "frconfig.h"
+    #include "..\portable\BCC\16BitDOS\PC\prtmacro.h"
+    typedef void ( __interrupt __far * pxISR )();
+#endif
+
+#ifdef BCC_FLASH_LITE_186_PORT
+
+/* A short file name has to be used in place of the normal
+ * FreeRTOSConfig.h when using the Borland compiler. */
+    #include "frconfig.h"
+    #include "..\portable\BCC\16BitDOS\flsh186\prtmacro.h"
+    typedef void ( __interrupt __far * pxISR )();
+#endif
+
+#ifdef __GNUC__
+    #ifdef __AVR32_AVR32A__
+        #include "portmacro.h"
+    #endif
+#endif
+
+#ifdef __ICCAVR32__
+    #ifdef __CORE__
+        #if __CORE__ == __AVR32A__
+            #include "portmacro.h"
+        #endif
+    #endif
+#endif
+
+#ifdef __91467D
+    #include "portmacro.h"
+#endif
+
+#ifdef __96340
+    #include "portmacro.h"
+#endif
+
+
+#ifdef __IAR_V850ES_Fx3__
+    #include "../../Source/portable/IAR/V850ES/portmacro.h"
+#endif
+
+#ifdef __IAR_V850ES_Jx3__
+    #include "../../Source/portable/IAR/V850ES/portmacro.h"
+#endif
+
+#ifdef __IAR_V850ES_Jx3_L__
+    #include "../../Source/portable/IAR/V850ES/portmacro.h"
+#endif
+
+#ifdef __IAR_V850ES_Jx2__
+    #include "../../Source/portable/IAR/V850ES/portmacro.h"
+#endif
+
+#ifdef __IAR_V850ES_Hx2__
+    #include "../../Source/portable/IAR/V850ES/portmacro.h"
+#endif
+
+#ifdef __IAR_78K0R_Kx3__
+    #include "../../Source/portable/IAR/78K0R/portmacro.h"
+#endif
+
+#ifdef __IAR_78K0R_Kx3L__
+    #include "../../Source/portable/IAR/78K0R/portmacro.h"
+#endif
+
+#endif /* DEPRECATED_DEFINITIONS_H */

prj/TCPClient/FreeRTOS/include/event_groups.h

@@ -0,0 +1,777 @@
+/*
+ * FreeRTOS Kernel V10.4.6
+ * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * https://www.FreeRTOS.org
+ * https://github.com/FreeRTOS
+ *
+ */
+
+#ifndef EVENT_GROUPS_H
+#define EVENT_GROUPS_H
+
+#ifndef INC_FREERTOS_H
+    #error "include FreeRTOS.h" must appear in source files before "include event_groups.h"
+#endif
+
+/* FreeRTOS includes. */
+#include "timers.h"
+
+/* *INDENT-OFF* */
+#ifdef __cplusplus
+    extern "C" {
+#endif
+/* *INDENT-ON* */
+
+/**
+ * An event group is a collection of bits to which an application can assign a
+ * meaning.  For example, an application may create an event group to convey
+ * the status of various CAN bus related events in which bit 0 might mean "A CAN
+ * message has been received and is ready for processing", bit 1 might mean "The
+ * application has queued a message that is ready for sending onto the CAN
+ * network", and bit 2 might mean "It is time to send a SYNC message onto the
+ * CAN network" etc.  A task can then test the bit values to see which events
+ * are active, and optionally enter the Blocked state to wait for a specified
+ * bit or a group of specified bits to be active.  To continue the CAN bus
+ * example, a CAN controlling task can enter the Blocked state (and therefore
+ * not consume any processing time) until either bit 0, bit 1 or bit 2 are
+ * active, at which time the bit that was actually active would inform the task
+ * which action it had to take (process a received message, send a message, or
+ * send a SYNC).
+ *
+ * The event groups implementation contains intelligence to avoid race
+ * conditions that would otherwise occur were an application to use a simple
+ * variable for the same purpose.  This is particularly important with respect
+ * to when a bit within an event group is to be cleared, and when bits have to
+ * be set and then tested atomically - as is the case where event groups are
+ * used to create a synchronisation point between multiple tasks (a
+ * 'rendezvous').
+ *
+ * \defgroup EventGroup
+ */
+
+
+
+/**
+ * event_groups.h
+ *
+ * Type by which event groups are referenced.  For example, a call to
+ * xEventGroupCreate() returns an EventGroupHandle_t variable that can then
+ * be used as a parameter to other event group functions.
+ *
+ * \defgroup EventGroupHandle_t EventGroupHandle_t
+ * \ingroup EventGroup
+ */
+struct EventGroupDef_t;
+typedef struct EventGroupDef_t   * EventGroupHandle_t;
+
+/*
+ * The type that holds event bits always matches TickType_t - therefore the
+ * number of bits it holds is set by configUSE_16_BIT_TICKS (16 bits if set to 1,
+ * 32 bits if set to 0.
+ *
+ * \defgroup EventBits_t EventBits_t
+ * \ingroup EventGroup
+ */
+typedef TickType_t               EventBits_t;
+
+/**
+ * event_groups.h
+ * @code{c}
+ * EventGroupHandle_t xEventGroupCreate( void );
+ * @endcode
+ *
+ * Create a new event group.
+ *
+ * Internally, within the FreeRTOS implementation, event groups use a [small]
+ * block of memory, in which the event group's structure is stored.  If an event
+ * groups is created using xEventGroupCreate() then the required memory is
+ * automatically dynamically allocated inside the xEventGroupCreate() function.
+ * (see https://www.FreeRTOS.org/a00111.html).  If an event group is created
+ * using xEventGroupCreateStatic() then the application writer must instead
+ * provide the memory that will get used by the event group.
+ * xEventGroupCreateStatic() therefore allows an event group to be created
+ * without using any dynamic memory allocation.
+ *
+ * Although event groups are not related to ticks, for internal implementation
+ * reasons the number of bits available for use in an event group is dependent
+ * on the configUSE_16_BIT_TICKS setting in FreeRTOSConfig.h.  If
+ * configUSE_16_BIT_TICKS is 1 then each event group contains 8 usable bits (bit
+ * 0 to bit 7).  If configUSE_16_BIT_TICKS is set to 0 then each event group has
+ * 24 usable bits (bit 0 to bit 23).  The EventBits_t type is used to store
+ * event bits within an event group.
+ *
+ * @return If the event group was created then a handle to the event group is
+ * returned.  If there was insufficient FreeRTOS heap available to create the
+ * event group then NULL is returned.  See https://www.FreeRTOS.org/a00111.html
+ *
+ * Example usage:
+ * @code{c}
+ *  // Declare a variable to hold the created event group.
+ *  EventGroupHandle_t xCreatedEventGroup;
+ *
+ *  // Attempt to create the event group.
+ *  xCreatedEventGroup = xEventGroupCreate();
+ *
+ *  // Was the event group created successfully?
+ *  if( xCreatedEventGroup == NULL )
+ *  {
+ *      // The event group was not created because there was insufficient
+ *      // FreeRTOS heap available.
+ *  }
+ *  else
+ *  {
+ *      // The event group was created.
+ *  }
+ * @endcode
+ * \defgroup xEventGroupCreate xEventGroupCreate
+ * \ingroup EventGroup
+ */
+#if ( configSUPPORT_DYNAMIC_ALLOCATION == 1 )
+    EventGroupHandle_t xEventGroupCreate( void ) PRIVILEGED_FUNCTION;
+#endif
+
+/**
+ * event_groups.h
+ * @code{c}
+ * EventGroupHandle_t xEventGroupCreateStatic( EventGroupHandle_t * pxEventGroupBuffer );
+ * @endcode
+ *
+ * Create a new event group.
+ *
+ * Internally, within the FreeRTOS implementation, event groups use a [small]
+ * block of memory, in which the event group's structure is stored.  If an event
+ * groups is created using xEventGroupCreate() then the required memory is
+ * automatically dynamically allocated inside the xEventGroupCreate() function.
+ * (see https://www.FreeRTOS.org/a00111.html).  If an event group is created
+ * using xEventGroupCreateStatic() then the application writer must instead
+ * provide the memory that will get used by the event group.
+ * xEventGroupCreateStatic() therefore allows an event group to be created
+ * without using any dynamic memory allocation.
+ *
+ * Although event groups are not related to ticks, for internal implementation
+ * reasons the number of bits available for use in an event group is dependent
+ * on the configUSE_16_BIT_TICKS setting in FreeRTOSConfig.h.  If
+ * configUSE_16_BIT_TICKS is 1 then each event group contains 8 usable bits (bit
+ * 0 to bit 7).  If configUSE_16_BIT_TICKS is set to 0 then each event group has
+ * 24 usable bits (bit 0 to bit 23).  The EventBits_t type is used to store
+ * event bits within an event group.
+ *
+ * @param pxEventGroupBuffer pxEventGroupBuffer must point to a variable of type
+ * StaticEventGroup_t, which will be then be used to hold the event group's data
+ * structures, removing the need for the memory to be allocated dynamically.
+ *
+ * @return If the event group was created then a handle to the event group is
+ * returned.  If pxEventGroupBuffer was NULL then NULL is returned.
+ *
+ * Example usage:
+ * @code{c}
+ *  // StaticEventGroup_t is a publicly accessible structure that has the same
+ *  // size and alignment requirements as the real event group structure.  It is
+ *  // provided as a mechanism for applications to know the size of the event
+ *  // group (which is dependent on the architecture and configuration file
+ *  // settings) without breaking the strict data hiding policy by exposing the
+ *  // real event group internals.  This StaticEventGroup_t variable is passed
+ *  // into the xSemaphoreCreateEventGroupStatic() function and is used to store
+ *  // the event group's data structures
+ *  StaticEventGroup_t xEventGroupBuffer;
+ *
+ *  // Create the event group without dynamically allocating any memory.
+ *  xEventGroup = xEventGroupCreateStatic( &xEventGroupBuffer );
+ * @endcode
+ */
+#if ( configSUPPORT_STATIC_ALLOCATION == 1 )
+    EventGroupHandle_t xEventGroupCreateStatic( StaticEventGroup_t * pxEventGroupBuffer ) PRIVILEGED_FUNCTION;
+#endif
+
+/**
+ * event_groups.h
+ * @code{c}
+ *  EventBits_t xEventGroupWaitBits(    EventGroupHandle_t xEventGroup,
+ *                                      const EventBits_t uxBitsToWaitFor,
+ *                                      const BaseType_t xClearOnExit,
+ *                                      const BaseType_t xWaitForAllBits,
+ *                                      const TickType_t xTicksToWait );
+ * @endcode
+ *
+ * [Potentially] block to wait for one or more bits to be set within a
+ * previously created event group.
+ *
+ * This function cannot be called from an interrupt.
+ *
+ * @param xEventGroup The event group in which the bits are being tested.  The
+ * event group must have previously been created using a call to
+ * xEventGroupCreate().
+ *
+ * @param uxBitsToWaitFor A bitwise value that indicates the bit or bits to test
+ * inside the event group.  For example, to wait for bit 0 and/or bit 2 set
+ * uxBitsToWaitFor to 0x05.  To wait for bits 0 and/or bit 1 and/or bit 2 set
+ * uxBitsToWaitFor to 0x07.  Etc.
+ *
+ * @param xClearOnExit If xClearOnExit is set to pdTRUE then any bits within
+ * uxBitsToWaitFor that are set within the event group will be cleared before
+ * xEventGroupWaitBits() returns if the wait condition was met (if the function
+ * returns for a reason other than a timeout).  If xClearOnExit is set to
+ * pdFALSE then the bits set in the event group are not altered when the call to
+ * xEventGroupWaitBits() returns.
+ *
+ * @param xWaitForAllBits If xWaitForAllBits is set to pdTRUE then
+ * xEventGroupWaitBits() will return when either all the bits in uxBitsToWaitFor
+ * are set or the specified block time expires.  If xWaitForAllBits is set to
+ * pdFALSE then xEventGroupWaitBits() will return when any one of the bits set
+ * in uxBitsToWaitFor is set or the specified block time expires.  The block
+ * time is specified by the xTicksToWait parameter.
+ *
+ * @param xTicksToWait The maximum amount of time (specified in 'ticks') to wait
+ * for one/all (depending on the xWaitForAllBits value) of the bits specified by
+ * uxBitsToWaitFor to become set.
+ *
+ * @return The value of the event group at the time either the bits being waited
+ * for became set, or the block time expired.  Test the return value to know
+ * which bits were set.  If xEventGroupWaitBits() returned because its timeout
+ * expired then not all the bits being waited for will be set.  If
+ * xEventGroupWaitBits() returned because the bits it was waiting for were set
+ * then the returned value is the event group value before any bits were
+ * automatically cleared in the case that xClearOnExit parameter was set to
+ * pdTRUE.
+ *
+ * Example usage:
+ * @code{c}
+ * #define BIT_0 ( 1 << 0 )
+ * #define BIT_4 ( 1 << 4 )
+ *
+ * void aFunction( EventGroupHandle_t xEventGroup )
+ * {
+ * EventBits_t uxBits;
+ * const TickType_t xTicksToWait = 100 / portTICK_PERIOD_MS;
+ *
+ *      // Wait a maximum of 100ms for either bit 0 or bit 4 to be set within
+ *      // the event group.  Clear the bits before exiting.
+ *      uxBits = xEventGroupWaitBits(
+ *                  xEventGroup,    // The event group being tested.
+ *                  BIT_0 | BIT_4,  // The bits within the event group to wait for.
+ *                  pdTRUE,         // BIT_0 and BIT_4 should be cleared before returning.
+ *                  pdFALSE,        // Don't wait for both bits, either bit will do.
+ *                  xTicksToWait ); // Wait a maximum of 100ms for either bit to be set.
+ *
+ *      if( ( uxBits & ( BIT_0 | BIT_4 ) ) == ( BIT_0 | BIT_4 ) )
+ *      {
+ *          // xEventGroupWaitBits() returned because both bits were set.
+ *      }
+ *      else if( ( uxBits & BIT_0 ) != 0 )
+ *      {
+ *          // xEventGroupWaitBits() returned because just BIT_0 was set.
+ *      }
+ *      else if( ( uxBits & BIT_4 ) != 0 )
+ *      {
+ *          // xEventGroupWaitBits() returned because just BIT_4 was set.
+ *      }
+ *      else
+ *      {
+ *          // xEventGroupWaitBits() returned because xTicksToWait ticks passed
+ *          // without either BIT_0 or BIT_4 becoming set.
+ *      }
+ * }
+ * @endcode
+ * \defgroup xEventGroupWaitBits xEventGroupWaitBits
+ * \ingroup EventGroup
+ */
+EventBits_t xEventGroupWaitBits( EventGroupHandle_t xEventGroup,
+                                 const EventBits_t uxBitsToWaitFor,
+                                 const BaseType_t xClearOnExit,
+                                 const BaseType_t xWaitForAllBits,
+                                 TickType_t xTicksToWait ) PRIVILEGED_FUNCTION;
+
+/**
+ * event_groups.h
+ * @code{c}
+ *  EventBits_t xEventGroupClearBits( EventGroupHandle_t xEventGroup, const EventBits_t uxBitsToClear );
+ * @endcode
+ *
+ * Clear bits within an event group.  This function cannot be called from an
+ * interrupt.
+ *
+ * @param xEventGroup The event group in which the bits are to be cleared.
+ *
+ * @param uxBitsToClear A bitwise value that indicates the bit or bits to clear
+ * in the event group.  For example, to clear bit 3 only, set uxBitsToClear to
+ * 0x08.  To clear bit 3 and bit 0 set uxBitsToClear to 0x09.
+ *
+ * @return The value of the event group before the specified bits were cleared.
+ *
+ * Example usage:
+ * @code{c}
+ * #define BIT_0 ( 1 << 0 )
+ * #define BIT_4 ( 1 << 4 )
+ *
+ * void aFunction( EventGroupHandle_t xEventGroup )
+ * {
+ * EventBits_t uxBits;
+ *
+ *      // Clear bit 0 and bit 4 in xEventGroup.
+ *      uxBits = xEventGroupClearBits(
+ *                              xEventGroup,    // The event group being updated.
+ *                              BIT_0 | BIT_4 );// The bits being cleared.
+ *
+ *      if( ( uxBits & ( BIT_0 | BIT_4 ) ) == ( BIT_0 | BIT_4 ) )
+ *      {
+ *          // Both bit 0 and bit 4 were set before xEventGroupClearBits() was
+ *          // called.  Both will now be clear (not set).
+ *      }
+ *      else if( ( uxBits & BIT_0 ) != 0 )
+ *      {
+ *          // Bit 0 was set before xEventGroupClearBits() was called.  It will
+ *          // now be clear.
+ *      }
+ *      else if( ( uxBits & BIT_4 ) != 0 )
+ *      {
+ *          // Bit 4 was set before xEventGroupClearBits() was called.  It will
+ *          // now be clear.
+ *      }
+ *      else
+ *      {
+ *          // Neither bit 0 nor bit 4 were set in the first place.
+ *      }
+ * }
+ * @endcode
+ * \defgroup xEventGroupClearBits xEventGroupClearBits
+ * \ingroup EventGroup
+ */
+EventBits_t xEventGroupClearBits( EventGroupHandle_t xEventGroup,
+                                  const EventBits_t uxBitsToClear ) PRIVILEGED_FUNCTION;
+
+/**
+ * event_groups.h
+ * @code{c}
+ *  BaseType_t xEventGroupClearBitsFromISR( EventGroupHandle_t xEventGroup, const EventBits_t uxBitsToSet );
+ * @endcode
+ *
+ * A version of xEventGroupClearBits() that can be called from an interrupt.
+ *
+ * Setting bits in an event group is not a deterministic operation because there
+ * are an unknown number of tasks that may be waiting for the bit or bits being
+ * set.  FreeRTOS does not allow nondeterministic operations to be performed
+ * while interrupts are disabled, so protects event groups that are accessed
+ * from tasks by suspending the scheduler rather than disabling interrupts.  As
+ * a result event groups cannot be accessed directly from an interrupt service
+ * routine.  Therefore xEventGroupClearBitsFromISR() sends a message to the
+ * timer task to have the clear operation performed in the context of the timer
+ * task.
+ *
+ * @param xEventGroup The event group in which the bits are to be cleared.
+ *
+ * @param uxBitsToClear A bitwise value that indicates the bit or bits to clear.
+ * For example, to clear bit 3 only, set uxBitsToClear to 0x08.  To clear bit 3
+ * and bit 0 set uxBitsToClear to 0x09.
+ *
+ * @return If the request to execute the function was posted successfully then
+ * pdPASS is returned, otherwise pdFALSE is returned.  pdFALSE will be returned
+ * if the timer service queue was full.
+ *
+ * Example usage:
+ * @code{c}
+ * #define BIT_0 ( 1 << 0 )
+ * #define BIT_4 ( 1 << 4 )
+ *
+ * // An event group which it is assumed has already been created by a call to
+ * // xEventGroupCreate().
+ * EventGroupHandle_t xEventGroup;
+ *
+ * void anInterruptHandler( void )
+ * {
+ *      // Clear bit 0 and bit 4 in xEventGroup.
+ *      xResult = xEventGroupClearBitsFromISR(
+ *                          xEventGroup,     // The event group being updated.
+ *                          BIT_0 | BIT_4 ); // The bits being set.
+ *
+ *      if( xResult == pdPASS )
+ *      {
+ *          // The message was posted successfully.
+ *      }
+ * }
+ * @endcode
+ * \defgroup xEventGroupClearBitsFromISR xEventGroupClearBitsFromISR
+ * \ingroup EventGroup
+ */
+#if ( configUSE_TRACE_FACILITY == 1 )
+    BaseType_t xEventGroupClearBitsFromISR( EventGroupHandle_t xEventGroup,
+                                            const EventBits_t uxBitsToClear ) PRIVILEGED_FUNCTION;
+#else
+    #define xEventGroupClearBitsFromISR( xEventGroup, uxBitsToClear ) \
+    xTimerPendFunctionCallFromISR( vEventGroupClearBitsCallback, ( void * ) xEventGroup, ( uint32_t ) uxBitsToClear, NULL )
+#endif
+
+/**
+ * event_groups.h
+ * @code{c}
+ *  EventBits_t xEventGroupSetBits( EventGroupHandle_t xEventGroup, const EventBits_t uxBitsToSet );
+ * @endcode
+ *
+ * Set bits within an event group.
+ * This function cannot be called from an interrupt.  xEventGroupSetBitsFromISR()
+ * is a version that can be called from an interrupt.
+ *
+ * Setting bits in an event group will automatically unblock tasks that are
+ * blocked waiting for the bits.
+ *
+ * @param xEventGroup The event group in which the bits are to be set.
+ *
+ * @param uxBitsToSet A bitwise value that indicates the bit or bits to set.
+ * For example, to set bit 3 only, set uxBitsToSet to 0x08.  To set bit 3
+ * and bit 0 set uxBitsToSet to 0x09.
+ *
+ * @return The value of the event group at the time the call to
+ * xEventGroupSetBits() returns.  There are two reasons why the returned value
+ * might have the bits specified by the uxBitsToSet parameter cleared.  First,
+ * if setting a bit results in a task that was waiting for the bit leaving the
+ * blocked state then it is possible the bit will be cleared automatically
+ * (see the xClearBitOnExit parameter of xEventGroupWaitBits()).  Second, any
+ * unblocked (or otherwise Ready state) task that has a priority above that of
+ * the task that called xEventGroupSetBits() will execute and may change the
+ * event group value before the call to xEventGroupSetBits() returns.
+ *
+ * Example usage:
+ * @code{c}
+ * #define BIT_0 ( 1 << 0 )
+ * #define BIT_4 ( 1 << 4 )
+ *
+ * void aFunction( EventGroupHandle_t xEventGroup )
+ * {
+ * EventBits_t uxBits;
+ *
+ *      // Set bit 0 and bit 4 in xEventGroup.
+ *      uxBits = xEventGroupSetBits(
+ *                          xEventGroup,    // The event group being updated.
+ *                          BIT_0 | BIT_4 );// The bits being set.
+ *
+ *      if( ( uxBits & ( BIT_0 | BIT_4 ) ) == ( BIT_0 | BIT_4 ) )
+ *      {
+ *          // Both bit 0 and bit 4 remained set when the function returned.
+ *      }
+ *      else if( ( uxBits & BIT_0 ) != 0 )
+ *      {
+ *          // Bit 0 remained set when the function returned, but bit 4 was
+ *          // cleared.  It might be that bit 4 was cleared automatically as a
+ *          // task that was waiting for bit 4 was removed from the Blocked
+ *          // state.
+ *      }
+ *      else if( ( uxBits & BIT_4 ) != 0 )
+ *      {
+ *          // Bit 4 remained set when the function returned, but bit 0 was
+ *          // cleared.  It might be that bit 0 was cleared automatically as a
+ *          // task that was waiting for bit 0 was removed from the Blocked
+ *          // state.
+ *      }
+ *      else
+ *      {
+ *          // Neither bit 0 nor bit 4 remained set.  It might be that a task
+ *          // was waiting for both of the bits to be set, and the bits were
+ *          // cleared as the task left the Blocked state.
+ *      }
+ * }
+ * @endcode
+ * \defgroup xEventGroupSetBits xEventGroupSetBits
+ * \ingroup EventGroup
+ */
+EventBits_t xEventGroupSetBits( EventGroupHandle_t xEventGroup,
+                                const EventBits_t uxBitsToSet ) PRIVILEGED_FUNCTION;
+
+/**
+ * event_groups.h
+ * @code{c}
+ *  BaseType_t xEventGroupSetBitsFromISR( EventGroupHandle_t xEventGroup, const EventBits_t uxBitsToSet, BaseType_t *pxHigherPriorityTaskWoken );
+ * @endcode
+ *
+ * A version of xEventGroupSetBits() that can be called from an interrupt.
+ *
+ * Setting bits in an event group is not a deterministic operation because there
+ * are an unknown number of tasks that may be waiting for the bit or bits being
+ * set.  FreeRTOS does not allow nondeterministic operations to be performed in
+ * interrupts or from critical sections.  Therefore xEventGroupSetBitsFromISR()
+ * sends a message to the timer task to have the set operation performed in the
+ * context of the timer task - where a scheduler lock is used in place of a
+ * critical section.
+ *
+ * @param xEventGroup The event group in which the bits are to be set.
+ *
+ * @param uxBitsToSet A bitwise value that indicates the bit or bits to set.
+ * For example, to set bit 3 only, set uxBitsToSet to 0x08.  To set bit 3
+ * and bit 0 set uxBitsToSet to 0x09.
+ *
+ * @param pxHigherPriorityTaskWoken As mentioned above, calling this function
+ * will result in a message being sent to the timer daemon task.  If the
+ * priority of the timer daemon task is higher than the priority of the
+ * currently running task (the task the interrupt interrupted) then
+ * *pxHigherPriorityTaskWoken will be set to pdTRUE by
+ * xEventGroupSetBitsFromISR(), indicating that a context switch should be
+ * requested before the interrupt exits.  For that reason
+ * *pxHigherPriorityTaskWoken must be initialised to pdFALSE.  See the
+ * example code below.
+ *
+ * @return If the request to execute the function was posted successfully then
+ * pdPASS is returned, otherwise pdFALSE is returned.  pdFALSE will be returned
+ * if the timer service queue was full.
+ *
+ * Example usage:
+ * @code{c}
+ * #define BIT_0 ( 1 << 0 )
+ * #define BIT_4 ( 1 << 4 )
+ *
+ * // An event group which it is assumed has already been created by a call to
+ * // xEventGroupCreate().
+ * EventGroupHandle_t xEventGroup;
+ *
+ * void anInterruptHandler( void )
+ * {
+ * BaseType_t xHigherPriorityTaskWoken, xResult;
+ *
+ *      // xHigherPriorityTaskWoken must be initialised to pdFALSE.
+ *      xHigherPriorityTaskWoken = pdFALSE;
+ *
+ *      // Set bit 0 and bit 4 in xEventGroup.
+ *      xResult = xEventGroupSetBitsFromISR(
+ *                          xEventGroup,    // The event group being updated.
+ *                          BIT_0 | BIT_4   // The bits being set.
+ *                          &xHigherPriorityTaskWoken );
+ *
+ *      // Was the message posted successfully?
+ *      if( xResult == pdPASS )
+ *      {
+ *          // If xHigherPriorityTaskWoken is now set to pdTRUE then a context
+ *          // switch should be requested.  The macro used is port specific and
+ *          // will be either portYIELD_FROM_ISR() or portEND_SWITCHING_ISR() -
+ *          // refer to the documentation page for the port being used.
+ *          portYIELD_FROM_ISR( xHigherPriorityTaskWoken );
+ *      }
+ * }
+ * @endcode
+ * \defgroup xEventGroupSetBitsFromISR xEventGroupSetBitsFromISR
+ * \ingroup EventGroup
+ */
+#if ( configUSE_TRACE_FACILITY == 1 )
+    BaseType_t xEventGroupSetBitsFromISR( EventGroupHandle_t xEventGroup,
+                                          const EventBits_t uxBitsToSet,
+                                          BaseType_t * pxHigherPriorityTaskWoken ) PRIVILEGED_FUNCTION;
+#else
+    #define xEventGroupSetBitsFromISR( xEventGroup, uxBitsToSet, pxHigherPriorityTaskWoken ) \
+    xTimerPendFunctionCallFromISR( vEventGroupSetBitsCallback, ( void * ) xEventGroup, ( uint32_t ) uxBitsToSet, pxHigherPriorityTaskWoken )
+#endif
+
+/**
+ * event_groups.h
+ * @code{c}
+ *  EventBits_t xEventGroupSync(    EventGroupHandle_t xEventGroup,
+ *                                  const EventBits_t uxBitsToSet,
+ *                                  const EventBits_t uxBitsToWaitFor,
+ *                                  TickType_t xTicksToWait );
+ * @endcode
+ *
+ * Atomically set bits within an event group, then wait for a combination of
+ * bits to be set within the same event group.  This functionality is typically
+ * used to synchronise multiple tasks, where each task has to wait for the other
+ * tasks to reach a synchronisation point before proceeding.
+ *
+ * This function cannot be used from an interrupt.
+ *
+ * The function will return before its block time expires if the bits specified
+ * by the uxBitsToWait parameter are set, or become set within that time.  In
+ * this case all the bits specified by uxBitsToWait will be automatically
+ * cleared before the function returns.
+ *
+ * @param xEventGroup The event group in which the bits are being tested.  The
+ * event group must have previously been created using a call to
+ * xEventGroupCreate().
+ *
+ * @param uxBitsToSet The bits to set in the event group before determining
+ * if, and possibly waiting for, all the bits specified by the uxBitsToWait
+ * parameter are set.
+ *
+ * @param uxBitsToWaitFor A bitwise value that indicates the bit or bits to test
+ * inside the event group.  For example, to wait for bit 0 and bit 2 set
+ * uxBitsToWaitFor to 0x05.  To wait for bits 0 and bit 1 and bit 2 set
+ * uxBitsToWaitFor to 0x07.  Etc.
+ *
+ * @param xTicksToWait The maximum amount of time (specified in 'ticks') to wait
+ * for all of the bits specified by uxBitsToWaitFor to become set.
+ *
+ * @return The value of the event group at the time either the bits being waited
+ * for became set, or the block time expired.  Test the return value to know
+ * which bits were set.  If xEventGroupSync() returned because its timeout
+ * expired then not all the bits being waited for will be set.  If
+ * xEventGroupSync() returned because all the bits it was waiting for were
+ * set then the returned value is the event group value before any bits were
+ * automatically cleared.
+ *
+ * Example usage:
+ * @code{c}
+ * // Bits used by the three tasks.
+ * #define TASK_0_BIT     ( 1 << 0 )
+ * #define TASK_1_BIT     ( 1 << 1 )
+ * #define TASK_2_BIT     ( 1 << 2 )
+ *
+ * #define ALL_SYNC_BITS ( TASK_0_BIT | TASK_1_BIT | TASK_2_BIT )
+ *
+ * // Use an event group to synchronise three tasks.  It is assumed this event
+ * // group has already been created elsewhere.
+ * EventGroupHandle_t xEventBits;
+ *
+ * void vTask0( void *pvParameters )
+ * {
+ * EventBits_t uxReturn;
+ * TickType_t xTicksToWait = 100 / portTICK_PERIOD_MS;
+ *
+ *   for( ;; )
+ *   {
+ *      // Perform task functionality here.
+ *
+ *      // Set bit 0 in the event flag to note this task has reached the
+ *      // sync point.  The other two tasks will set the other two bits defined
+ *      // by ALL_SYNC_BITS.  All three tasks have reached the synchronisation
+ *      // point when all the ALL_SYNC_BITS are set.  Wait a maximum of 100ms
+ *      // for this to happen.
+ *      uxReturn = xEventGroupSync( xEventBits, TASK_0_BIT, ALL_SYNC_BITS, xTicksToWait );
+ *
+ *      if( ( uxReturn & ALL_SYNC_BITS ) == ALL_SYNC_BITS )
+ *      {
+ *          // All three tasks reached the synchronisation point before the call
+ *          // to xEventGroupSync() timed out.
+ *      }
+ *  }
+ * }
+ *
+ * void vTask1( void *pvParameters )
+ * {
+ *   for( ;; )
+ *   {
+ *      // Perform task functionality here.
+ *
+ *      // Set bit 1 in the event flag to note this task has reached the
+ *      // synchronisation point.  The other two tasks will set the other two
+ *      // bits defined by ALL_SYNC_BITS.  All three tasks have reached the
+ *      // synchronisation point when all the ALL_SYNC_BITS are set.  Wait
+ *      // indefinitely for this to happen.
+ *      xEventGroupSync( xEventBits, TASK_1_BIT, ALL_SYNC_BITS, portMAX_DELAY );
+ *
+ *      // xEventGroupSync() was called with an indefinite block time, so
+ *      // this task will only reach here if the synchronisation was made by all
+ *      // three tasks, so there is no need to test the return value.
+ *   }
+ * }
+ *
+ * void vTask2( void *pvParameters )
+ * {
+ *   for( ;; )
+ *   {
+ *      // Perform task functionality here.
+ *
+ *      // Set bit 2 in the event flag to note this task has reached the
+ *      // synchronisation point.  The other two tasks will set the other two
+ *      // bits defined by ALL_SYNC_BITS.  All three tasks have reached the
+ *      // synchronisation point when all the ALL_SYNC_BITS are set.  Wait
+ *      // indefinitely for this to happen.
+ *      xEventGroupSync( xEventBits, TASK_2_BIT, ALL_SYNC_BITS, portMAX_DELAY );
+ *
+ *      // xEventGroupSync() was called with an indefinite block time, so
+ *      // this task will only reach here if the synchronisation was made by all
+ *      // three tasks, so there is no need to test the return value.
+ *  }
+ * }
+ *
+ * @endcode
+ * \defgroup xEventGroupSync xEventGroupSync
+ * \ingroup EventGroup
+ */
+EventBits_t xEventGroupSync( EventGroupHandle_t xEventGroup,
+                             const EventBits_t uxBitsToSet,
+                             const EventBits_t uxBitsToWaitFor,
+                             TickType_t xTicksToWait ) PRIVILEGED_FUNCTION;
+
+
+/**
+ * event_groups.h
+ * @code{c}
+ *  EventBits_t xEventGroupGetBits( EventGroupHandle_t xEventGroup );
+ * @endcode
+ *
+ * Returns the current value of the bits in an event group.  This function
+ * cannot be used from an interrupt.
+ *
+ * @param xEventGroup The event group being queried.
+ *
+ * @return The event group bits at the time xEventGroupGetBits() was called.
+ *
+ * \defgroup xEventGroupGetBits xEventGroupGetBits
+ * \ingroup EventGroup
+ */
+#define xEventGroupGetBits( xEventGroup )    xEventGroupClearBits( xEventGroup, 0 )
+
+/**
+ * event_groups.h
+ * @code{c}
+ *  EventBits_t xEventGroupGetBitsFromISR( EventGroupHandle_t xEventGroup );
+ * @endcode
+ *
+ * A version of xEventGroupGetBits() that can be called from an ISR.
+ *
+ * @param xEventGroup The event group being queried.
+ *
+ * @return The event group bits at the time xEventGroupGetBitsFromISR() was called.
+ *
+ * \defgroup xEventGroupGetBitsFromISR xEventGroupGetBitsFromISR
+ * \ingroup EventGroup
+ */
+EventBits_t xEventGroupGetBitsFromISR( EventGroupHandle_t xEventGroup ) PRIVILEGED_FUNCTION;
+
+/**
+ * event_groups.h
+ * @code{c}
+ *  void xEventGroupDelete( EventGroupHandle_t xEventGroup );
+ * @endcode
+ *
+ * Delete an event group that was previously created by a call to
+ * xEventGroupCreate().  Tasks that are blocked on the event group will be
+ * unblocked and obtain 0 as the event group's value.
+ *
+ * @param xEventGroup The event group being deleted.
+ */
+void vEventGroupDelete( EventGroupHandle_t xEventGroup ) PRIVILEGED_FUNCTION;
+
+/* For internal use only. */
+void vEventGroupSetBitsCallback( void * pvEventGroup,
+                                 const uint32_t ulBitsToSet ) PRIVILEGED_FUNCTION;
+void vEventGroupClearBitsCallback( void * pvEventGroup,
+                                   const uint32_t ulBitsToClear ) PRIVILEGED_FUNCTION;
+
+
+#if ( configUSE_TRACE_FACILITY == 1 )
+    UBaseType_t uxEventGroupGetNumber( void * xEventGroup ) PRIVILEGED_FUNCTION;
+    void vEventGroupSetNumber( void * xEventGroup,
+                               UBaseType_t uxEventGroupNumber ) PRIVILEGED_FUNCTION;
+#endif
+
+/* *INDENT-OFF* */
+#ifdef __cplusplus
+    }
+#endif
+/* *INDENT-ON* */
+
+#endif /* EVENT_GROUPS_H */

prj/TCPClient/FreeRTOS/include/list.h

@@ -0,0 +1,499 @@
+/*
+ * FreeRTOS Kernel V10.4.6
+ * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * https://www.FreeRTOS.org
+ * https://github.com/FreeRTOS
+ *
+ */
+
+/*
+ * This is the list implementation used by the scheduler.  While it is tailored
+ * heavily for the schedulers needs, it is also available for use by
+ * application code.
+ *
+ * list_ts can only store pointers to list_item_ts.  Each ListItem_t contains a
+ * numeric value (xItemValue).  Most of the time the lists are sorted in
+ * ascending item value order.
+ *
+ * Lists are created already containing one list item.  The value of this
+ * item is the maximum possible that can be stored, it is therefore always at
+ * the end of the list and acts as a marker.  The list member pxHead always
+ * points to this marker - even though it is at the tail of the list.  This
+ * is because the tail contains a wrap back pointer to the true head of
+ * the list.
+ *
+ * In addition to it's value, each list item contains a pointer to the next
+ * item in the list (pxNext), a pointer to the list it is in (pxContainer)
+ * and a pointer to back to the object that contains it.  These later two
+ * pointers are included for efficiency of list manipulation.  There is
+ * effectively a two way link between the object containing the list item and
+ * the list item itself.
+ *
+ *
+ * \page ListIntroduction List Implementation
+ * \ingroup FreeRTOSIntro
+ */
+
+
+#ifndef LIST_H
+#define LIST_H
+
+#ifndef INC_FREERTOS_H
+    #error "FreeRTOS.h must be included before list.h"
+#endif
+
+/*
+ * The list structure members are modified from within interrupts, and therefore
+ * by rights should be declared volatile.  However, they are only modified in a
+ * functionally atomic way (within critical sections of with the scheduler
+ * suspended) and are either passed by reference into a function or indexed via
+ * a volatile variable.  Therefore, in all use cases tested so far, the volatile
+ * qualifier can be omitted in order to provide a moderate performance
+ * improvement without adversely affecting functional behaviour.  The assembly
+ * instructions generated by the IAR, ARM and GCC compilers when the respective
+ * compiler's options were set for maximum optimisation has been inspected and
+ * deemed to be as intended.  That said, as compiler technology advances, and
+ * especially if aggressive cross module optimisation is used (a use case that
+ * has not been exercised to any great extend) then it is feasible that the
+ * volatile qualifier will be needed for correct optimisation.  It is expected
+ * that a compiler removing essential code because, without the volatile
+ * qualifier on the list structure members and with aggressive cross module
+ * optimisation, the compiler deemed the code unnecessary will result in
+ * complete and obvious failure of the scheduler.  If this is ever experienced
+ * then the volatile qualifier can be inserted in the relevant places within the
+ * list structures by simply defining configLIST_VOLATILE to volatile in
+ * FreeRTOSConfig.h (as per the example at the bottom of this comment block).
+ * If configLIST_VOLATILE is not defined then the preprocessor directives below
+ * will simply #define configLIST_VOLATILE away completely.
+ *
+ * To use volatile list structure members then add the following line to
+ * FreeRTOSConfig.h (without the quotes):
+ * "#define configLIST_VOLATILE volatile"
+ */
+#ifndef configLIST_VOLATILE
+    #define configLIST_VOLATILE
+#endif /* configSUPPORT_CROSS_MODULE_OPTIMISATION */
+
+/* *INDENT-OFF* */
+#ifdef __cplusplus
+    extern "C" {
+#endif
+/* *INDENT-ON* */
+
+/* Macros that can be used to place known values within the list structures,
+ * then check that the known values do not get corrupted during the execution of
+ * the application.   These may catch the list data structures being overwritten in
+ * memory.  They will not catch data errors caused by incorrect configuration or
+ * use of FreeRTOS.*/
+#if ( configUSE_LIST_DATA_INTEGRITY_CHECK_BYTES == 0 )
+    /* Define the macros to do nothing. */
+    #define listFIRST_LIST_ITEM_INTEGRITY_CHECK_VALUE
+    #define listSECOND_LIST_ITEM_INTEGRITY_CHECK_VALUE
+    #define listFIRST_LIST_INTEGRITY_CHECK_VALUE
+    #define listSECOND_LIST_INTEGRITY_CHECK_VALUE
+    #define listSET_FIRST_LIST_ITEM_INTEGRITY_CHECK_VALUE( pxItem )
+    #define listSET_SECOND_LIST_ITEM_INTEGRITY_CHECK_VALUE( pxItem )
+    #define listSET_LIST_INTEGRITY_CHECK_1_VALUE( pxList )
+    #define listSET_LIST_INTEGRITY_CHECK_2_VALUE( pxList )
+    #define listTEST_LIST_ITEM_INTEGRITY( pxItem )
+    #define listTEST_LIST_INTEGRITY( pxList )
+#else /* if ( configUSE_LIST_DATA_INTEGRITY_CHECK_BYTES == 0 ) */
+    /* Define macros that add new members into the list structures. */
+    #define listFIRST_LIST_ITEM_INTEGRITY_CHECK_VALUE     TickType_t xListItemIntegrityValue1;
+    #define listSECOND_LIST_ITEM_INTEGRITY_CHECK_VALUE    TickType_t xListItemIntegrityValue2;
+    #define listFIRST_LIST_INTEGRITY_CHECK_VALUE          TickType_t xListIntegrityValue1;
+    #define listSECOND_LIST_INTEGRITY_CHECK_VALUE         TickType_t xListIntegrityValue2;
+
+/* Define macros that set the new structure members to known values. */
+    #define listSET_FIRST_LIST_ITEM_INTEGRITY_CHECK_VALUE( pxItem )     ( pxItem )->xListItemIntegrityValue1 = pdINTEGRITY_CHECK_VALUE
+    #define listSET_SECOND_LIST_ITEM_INTEGRITY_CHECK_VALUE( pxItem )    ( pxItem )->xListItemIntegrityValue2 = pdINTEGRITY_CHECK_VALUE
+    #define listSET_LIST_INTEGRITY_CHECK_1_VALUE( pxList )              ( pxList )->xListIntegrityValue1 = pdINTEGRITY_CHECK_VALUE
+    #define listSET_LIST_INTEGRITY_CHECK_2_VALUE( pxList )              ( pxList )->xListIntegrityValue2 = pdINTEGRITY_CHECK_VALUE
+
+/* Define macros that will assert if one of the structure members does not
+ * contain its expected value. */
+    #define listTEST_LIST_ITEM_INTEGRITY( pxItem )                      configASSERT( ( ( pxItem )->xListItemIntegrityValue1 == pdINTEGRITY_CHECK_VALUE ) && ( ( pxItem )->xListItemIntegrityValue2 == pdINTEGRITY_CHECK_VALUE ) )
+    #define listTEST_LIST_INTEGRITY( pxList )                           configASSERT( ( ( pxList )->xListIntegrityValue1 == pdINTEGRITY_CHECK_VALUE ) && ( ( pxList )->xListIntegrityValue2 == pdINTEGRITY_CHECK_VALUE ) )
+#endif /* configUSE_LIST_DATA_INTEGRITY_CHECK_BYTES */
+
+
+/*
+ * Definition of the only type of object that a list can contain.
+ */
+struct xLIST;
+struct xLIST_ITEM
+{
+    listFIRST_LIST_ITEM_INTEGRITY_CHECK_VALUE           /*< Set to a known value if configUSE_LIST_DATA_INTEGRITY_CHECK_BYTES is set to 1. */
+    configLIST_VOLATILE TickType_t xItemValue;          /*< The value being listed.  In most cases this is used to sort the list in ascending order. */
+    struct xLIST_ITEM * configLIST_VOLATILE pxNext;     /*< Pointer to the next ListItem_t in the list. */
+    struct xLIST_ITEM * configLIST_VOLATILE pxPrevious; /*< Pointer to the previous ListItem_t in the list. */
+    void * pvOwner;                                     /*< Pointer to the object (normally a TCB) that contains the list item.  There is therefore a two way link between the object containing the list item and the list item itself. */
+    struct xLIST * configLIST_VOLATILE pxContainer;     /*< Pointer to the list in which this list item is placed (if any). */
+    listSECOND_LIST_ITEM_INTEGRITY_CHECK_VALUE          /*< Set to a known value if configUSE_LIST_DATA_INTEGRITY_CHECK_BYTES is set to 1. */
+};
+typedef struct xLIST_ITEM ListItem_t;                   /* For some reason lint wants this as two separate definitions. */
+
+struct xMINI_LIST_ITEM
+{
+    listFIRST_LIST_ITEM_INTEGRITY_CHECK_VALUE /*< Set to a known value if configUSE_LIST_DATA_INTEGRITY_CHECK_BYTES is set to 1. */
+    configLIST_VOLATILE TickType_t xItemValue;
+    struct xLIST_ITEM * configLIST_VOLATILE pxNext;
+    struct xLIST_ITEM * configLIST_VOLATILE pxPrevious;
+};
+typedef struct xMINI_LIST_ITEM MiniListItem_t;
+
+/*
+ * Definition of the type of queue used by the scheduler.
+ */
+typedef struct xLIST
+{
+    listFIRST_LIST_INTEGRITY_CHECK_VALUE      /*< Set to a known value if configUSE_LIST_DATA_INTEGRITY_CHECK_BYTES is set to 1. */
+    volatile UBaseType_t uxNumberOfItems;
+    ListItem_t * configLIST_VOLATILE pxIndex; /*< Used to walk through the list.  Points to the last item returned by a call to listGET_OWNER_OF_NEXT_ENTRY (). */
+    MiniListItem_t xListEnd;                  /*< List item that contains the maximum possible item value meaning it is always at the end of the list and is therefore used as a marker. */
+    listSECOND_LIST_INTEGRITY_CHECK_VALUE     /*< Set to a known value if configUSE_LIST_DATA_INTEGRITY_CHECK_BYTES is set to 1. */
+} List_t;
+
+/*
+ * Access macro to set the owner of a list item.  The owner of a list item
+ * is the object (usually a TCB) that contains the list item.
+ *
+ * \page listSET_LIST_ITEM_OWNER listSET_LIST_ITEM_OWNER
+ * \ingroup LinkedList
+ */
+#define listSET_LIST_ITEM_OWNER( pxListItem, pxOwner )    ( ( pxListItem )->pvOwner = ( void * ) ( pxOwner ) )
+
+/*
+ * Access macro to get the owner of a list item.  The owner of a list item
+ * is the object (usually a TCB) that contains the list item.
+ *
+ * \page listGET_LIST_ITEM_OWNER listSET_LIST_ITEM_OWNER
+ * \ingroup LinkedList
+ */
+#define listGET_LIST_ITEM_OWNER( pxListItem )             ( ( pxListItem )->pvOwner )
+
+/*
+ * Access macro to set the value of the list item.  In most cases the value is
+ * used to sort the list in ascending order.
+ *
+ * \page listSET_LIST_ITEM_VALUE listSET_LIST_ITEM_VALUE
+ * \ingroup LinkedList
+ */
+#define listSET_LIST_ITEM_VALUE( pxListItem, xValue )     ( ( pxListItem )->xItemValue = ( xValue ) )
+
+/*
+ * Access macro to retrieve the value of the list item.  The value can
+ * represent anything - for example the priority of a task, or the time at
+ * which a task should be unblocked.
+ *
+ * \page listGET_LIST_ITEM_VALUE listGET_LIST_ITEM_VALUE
+ * \ingroup LinkedList
+ */
+#define listGET_LIST_ITEM_VALUE( pxListItem )             ( ( pxListItem )->xItemValue )
+
+/*
+ * Access macro to retrieve the value of the list item at the head of a given
+ * list.
+ *
+ * \page listGET_LIST_ITEM_VALUE listGET_LIST_ITEM_VALUE
+ * \ingroup LinkedList
+ */
+#define listGET_ITEM_VALUE_OF_HEAD_ENTRY( pxList )        ( ( ( pxList )->xListEnd ).pxNext->xItemValue )
+
+/*
+ * Return the list item at the head of the list.
+ *
+ * \page listGET_HEAD_ENTRY listGET_HEAD_ENTRY
+ * \ingroup LinkedList
+ */
+#define listGET_HEAD_ENTRY( pxList )                      ( ( ( pxList )->xListEnd ).pxNext )
+
+/*
+ * Return the next list item.
+ *
+ * \page listGET_NEXT listGET_NEXT
+ * \ingroup LinkedList
+ */
+#define listGET_NEXT( pxListItem )                        ( ( pxListItem )->pxNext )
+
+/*
+ * Return the list item that marks the end of the list
+ *
+ * \page listGET_END_MARKER listGET_END_MARKER
+ * \ingroup LinkedList
+ */
+#define listGET_END_MARKER( pxList )                      ( ( ListItem_t const * ) ( &( ( pxList )->xListEnd ) ) )
+
+/*
+ * Access macro to determine if a list contains any items.  The macro will
+ * only have the value true if the list is empty.
+ *
+ * \page listLIST_IS_EMPTY listLIST_IS_EMPTY
+ * \ingroup LinkedList
+ */
+#define listLIST_IS_EMPTY( pxList )                       ( ( ( pxList )->uxNumberOfItems == ( UBaseType_t ) 0 ) ? pdTRUE : pdFALSE )
+
+/*
+ * Access macro to return the number of items in the list.
+ */
+#define listCURRENT_LIST_LENGTH( pxList )                 ( ( pxList )->uxNumberOfItems )
+
+/*
+ * Access function to obtain the owner of the next entry in a list.
+ *
+ * The list member pxIndex is used to walk through a list.  Calling
+ * listGET_OWNER_OF_NEXT_ENTRY increments pxIndex to the next item in the list
+ * and returns that entry's pxOwner parameter.  Using multiple calls to this
+ * function it is therefore possible to move through every item contained in
+ * a list.
+ *
+ * The pxOwner parameter of a list item is a pointer to the object that owns
+ * the list item.  In the scheduler this is normally a task control block.
+ * The pxOwner parameter effectively creates a two way link between the list
+ * item and its owner.
+ *
+ * @param pxTCB pxTCB is set to the address of the owner of the next list item.
+ * @param pxList The list from which the next item owner is to be returned.
+ *
+ * \page listGET_OWNER_OF_NEXT_ENTRY listGET_OWNER_OF_NEXT_ENTRY
+ * \ingroup LinkedList
+ */
+#define listGET_OWNER_OF_NEXT_ENTRY( pxTCB, pxList )                                           \
+    {                                                                                          \
+        List_t * const pxConstList = ( pxList );                                               \
+        /* Increment the index to the next item and return the item, ensuring */               \
+        /* we don't return the marker used at the end of the list.  */                         \
+        ( pxConstList )->pxIndex = ( pxConstList )->pxIndex->pxNext;                           \
+        if( ( void * ) ( pxConstList )->pxIndex == ( void * ) &( ( pxConstList )->xListEnd ) ) \
+        {                                                                                      \
+            ( pxConstList )->pxIndex = ( pxConstList )->pxIndex->pxNext;                       \
+        }                                                                                      \
+        ( pxTCB ) = ( pxConstList )->pxIndex->pvOwner;                                         \
+    }
+
+/*
+ * Version of uxListRemove() that does not return a value.  Provided as a slight
+ * optimisation for xTaskIncrementTick() by being inline.
+ *
+ * Remove an item from a list.  The list item has a pointer to the list that
+ * it is in, so only the list item need be passed into the function.
+ *
+ * @param uxListRemove The item to be removed.  The item will remove itself from
+ * the list pointed to by it's pxContainer parameter.
+ *
+ * @return The number of items that remain in the list after the list item has
+ * been removed.
+ *
+ * \page listREMOVE_ITEM listREMOVE_ITEM
+ * \ingroup LinkedList
+ */
+#define listREMOVE_ITEM( pxItemToRemove ) \
+    {                                     \
+        /* The list item knows which list it is in.  Obtain the list from the list \
+         * item. */                                                              \
+        List_t * const pxList = ( pxItemToRemove )->pxContainer;                 \
+                                                                                 \
+        ( pxItemToRemove )->pxNext->pxPrevious = ( pxItemToRemove )->pxPrevious; \
+        ( pxItemToRemove )->pxPrevious->pxNext = ( pxItemToRemove )->pxNext;     \
+        /* Make sure the index is left pointing to a valid item. */              \
+        if( pxList->pxIndex == ( pxItemToRemove ) )                              \
+        {                                                                        \
+            pxList->pxIndex = ( pxItemToRemove )->pxPrevious;                    \
+        }                                                                        \
+                                                                                 \
+        ( pxItemToRemove )->pxContainer = NULL;                                  \
+        ( pxList->uxNumberOfItems )--;                                           \
+    }
+
+/*
+ * Inline version of vListInsertEnd() to provide slight optimisation for
+ * xTaskIncrementTick().
+ *
+ * Insert a list item into a list.  The item will be inserted in a position
+ * such that it will be the last item within the list returned by multiple
+ * calls to listGET_OWNER_OF_NEXT_ENTRY.
+ *
+ * The list member pxIndex is used to walk through a list.  Calling
+ * listGET_OWNER_OF_NEXT_ENTRY increments pxIndex to the next item in the list.
+ * Placing an item in a list using vListInsertEnd effectively places the item
+ * in the list position pointed to by pxIndex.  This means that every other
+ * item within the list will be returned by listGET_OWNER_OF_NEXT_ENTRY before
+ * the pxIndex parameter again points to the item being inserted.
+ *
+ * @param pxList The list into which the item is to be inserted.
+ *
+ * @param pxNewListItem The list item to be inserted into the list.
+ *
+ * \page listINSERT_END listINSERT_END
+ * \ingroup LinkedList
+ */
+#define listINSERT_END( pxList, pxNewListItem )           \
+    {                                                     \
+        ListItem_t * const pxIndex = ( pxList )->pxIndex; \
+                                                          \
+        /* Only effective when configASSERT() is also defined, these tests may catch \
+         * the list data structures being overwritten in memory.  They will not catch \
+         * data errors caused by incorrect configuration or use of FreeRTOS. */ \
+        listTEST_LIST_INTEGRITY( ( pxList ) );                                  \
+        listTEST_LIST_ITEM_INTEGRITY( ( pxNewListItem ) );                      \
+                                                                                \
+        /* Insert a new list item into ( pxList ), but rather than sort the list, \
+         * makes the new list item the last item to be removed by a call to \
+         * listGET_OWNER_OF_NEXT_ENTRY(). */                 \
+        ( pxNewListItem )->pxNext = pxIndex;                 \
+        ( pxNewListItem )->pxPrevious = pxIndex->pxPrevious; \
+                                                             \
+        pxIndex->pxPrevious->pxNext = ( pxNewListItem );     \
+        pxIndex->pxPrevious = ( pxNewListItem );             \
+                                                             \
+        /* Remember which list the item is in. */            \
+        ( pxNewListItem )->pxContainer = ( pxList );         \
+                                                             \
+        ( ( pxList )->uxNumberOfItems )++;                   \
+    }
+
+/*
+ * Access function to obtain the owner of the first entry in a list.  Lists
+ * are normally sorted in ascending item value order.
+ *
+ * This function returns the pxOwner member of the first item in the list.
+ * The pxOwner parameter of a list item is a pointer to the object that owns
+ * the list item.  In the scheduler this is normally a task control block.
+ * The pxOwner parameter effectively creates a two way link between the list
+ * item and its owner.
+ *
+ * @param pxList The list from which the owner of the head item is to be
+ * returned.
+ *
+ * \page listGET_OWNER_OF_HEAD_ENTRY listGET_OWNER_OF_HEAD_ENTRY
+ * \ingroup LinkedList
+ */
+#define listGET_OWNER_OF_HEAD_ENTRY( pxList )            ( ( &( ( pxList )->xListEnd ) )->pxNext->pvOwner )
+
+/*
+ * Check to see if a list item is within a list.  The list item maintains a
+ * "container" pointer that points to the list it is in.  All this macro does
+ * is check to see if the container and the list match.
+ *
+ * @param pxList The list we want to know if the list item is within.
+ * @param pxListItem The list item we want to know if is in the list.
+ * @return pdTRUE if the list item is in the list, otherwise pdFALSE.
+ */
+#define listIS_CONTAINED_WITHIN( pxList, pxListItem )    ( ( ( pxListItem )->pxContainer == ( pxList ) ) ? ( pdTRUE ) : ( pdFALSE ) )
+
+/*
+ * Return the list a list item is contained within (referenced from).
+ *
+ * @param pxListItem The list item being queried.
+ * @return A pointer to the List_t object that references the pxListItem
+ */
+#define listLIST_ITEM_CONTAINER( pxListItem )            ( ( pxListItem )->pxContainer )
+
+/*
+ * This provides a crude means of knowing if a list has been initialised, as
+ * pxList->xListEnd.xItemValue is set to portMAX_DELAY by the vListInitialise()
+ * function.
+ */
+#define listLIST_IS_INITIALISED( pxList )                ( ( pxList )->xListEnd.xItemValue == portMAX_DELAY )
+
+/*
+ * Must be called before a list is used!  This initialises all the members
+ * of the list structure and inserts the xListEnd item into the list as a
+ * marker to the back of the list.
+ *
+ * @param pxList Pointer to the list being initialised.
+ *
+ * \page vListInitialise vListInitialise
+ * \ingroup LinkedList
+ */
+void vListInitialise( List_t * const pxList ) PRIVILEGED_FUNCTION;
+
+/*
+ * Must be called before a list item is used.  This sets the list container to
+ * null so the item does not think that it is already contained in a list.
+ *
+ * @param pxItem Pointer to the list item being initialised.
+ *
+ * \page vListInitialiseItem vListInitialiseItem
+ * \ingroup LinkedList
+ */
+void vListInitialiseItem( ListItem_t * const pxItem ) PRIVILEGED_FUNCTION;
+
+/*
+ * Insert a list item into a list.  The item will be inserted into the list in
+ * a position determined by its item value (ascending item value order).
+ *
+ * @param pxList The list into which the item is to be inserted.
+ *
+ * @param pxNewListItem The item that is to be placed in the list.
+ *
+ * \page vListInsert vListInsert
+ * \ingroup LinkedList
+ */
+void vListInsert( List_t * const pxList,
+                  ListItem_t * const pxNewListItem ) PRIVILEGED_FUNCTION;
+
+/*
+ * Insert a list item into a list.  The item will be inserted in a position
+ * such that it will be the last item within the list returned by multiple
+ * calls to listGET_OWNER_OF_NEXT_ENTRY.
+ *
+ * The list member pxIndex is used to walk through a list.  Calling
+ * listGET_OWNER_OF_NEXT_ENTRY increments pxIndex to the next item in the list.
+ * Placing an item in a list using vListInsertEnd effectively places the item
+ * in the list position pointed to by pxIndex.  This means that every other
+ * item within the list will be returned by listGET_OWNER_OF_NEXT_ENTRY before
+ * the pxIndex parameter again points to the item being inserted.
+ *
+ * @param pxList The list into which the item is to be inserted.
+ *
+ * @param pxNewListItem The list item to be inserted into the list.
+ *
+ * \page vListInsertEnd vListInsertEnd
+ * \ingroup LinkedList
+ */
+void vListInsertEnd( List_t * const pxList,
+                     ListItem_t * const pxNewListItem ) PRIVILEGED_FUNCTION;
+
+/*
+ * Remove an item from a list.  The list item has a pointer to the list that
+ * it is in, so only the list item need be passed into the function.
+ *
+ * @param uxListRemove The item to be removed.  The item will remove itself from
+ * the list pointed to by it's pxContainer parameter.
+ *
+ * @return The number of items that remain in the list after the list item has
+ * been removed.
+ *
+ * \page uxListRemove uxListRemove
+ * \ingroup LinkedList
+ */
+UBaseType_t uxListRemove( ListItem_t * const pxItemToRemove ) PRIVILEGED_FUNCTION;
+
+/* *INDENT-OFF* */
+#ifdef __cplusplus
+    }
+#endif
+/* *INDENT-ON* */
+
+#endif /* ifndef LIST_H */

prj/TCPClient/FreeRTOS/include/message_buffer.h

@@ -0,0 +1,823 @@
+/*
+ * FreeRTOS Kernel V10.4.6
+ * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * https://www.FreeRTOS.org
+ * https://github.com/FreeRTOS
+ *
+ */
+
+
+/*
+ * Message buffers build functionality on top of FreeRTOS stream buffers.
+ * Whereas stream buffers are used to send a continuous stream of data from one
+ * task or interrupt to another, message buffers are used to send variable
+ * length discrete messages from one task or interrupt to another.  Their
+ * implementation is light weight, making them particularly suited for interrupt
+ * to task and core to core communication scenarios.
+ *
+ * ***NOTE***:  Uniquely among FreeRTOS objects, the stream buffer
+ * implementation (so also the message buffer implementation, as message buffers
+ * are built on top of stream buffers) assumes there is only one task or
+ * interrupt that will write to the buffer (the writer), and only one task or
+ * interrupt that will read from the buffer (the reader).  It is safe for the
+ * writer and reader to be different tasks or interrupts, but, unlike other
+ * FreeRTOS objects, it is not safe to have multiple different writers or
+ * multiple different readers.  If there are to be multiple different writers
+ * then the application writer must place each call to a writing API function
+ * (such as xMessageBufferSend()) inside a critical section and set the send
+ * block time to 0.  Likewise, if there are to be multiple different readers
+ * then the application writer must place each call to a reading API function
+ * (such as xMessageBufferRead()) inside a critical section and set the receive
+ * timeout to 0.
+ *
+ * Message buffers hold variable length messages.  To enable that, when a
+ * message is written to the message buffer an additional sizeof( size_t ) bytes
+ * are also written to store the message's length (that happens internally, with
+ * the API function).  sizeof( size_t ) is typically 4 bytes on a 32-bit
+ * architecture, so writing a 10 byte message to a message buffer on a 32-bit
+ * architecture will actually reduce the available space in the message buffer
+ * by 14 bytes (10 byte are used by the message, and 4 bytes to hold the length
+ * of the message).
+ */
+
+#ifndef FREERTOS_MESSAGE_BUFFER_H
+#define FREERTOS_MESSAGE_BUFFER_H
+
+#ifndef INC_FREERTOS_H
+    #error "include FreeRTOS.h must appear in source files before include message_buffer.h"
+#endif
+
+/* Message buffers are built onto of stream buffers. */
+#include "stream_buffer.h"
+
+/* *INDENT-OFF* */
+#if defined( __cplusplus )
+    extern "C" {
+#endif
+/* *INDENT-ON* */
+
+/**
+ * Type by which message buffers are referenced.  For example, a call to
+ * xMessageBufferCreate() returns an MessageBufferHandle_t variable that can
+ * then be used as a parameter to xMessageBufferSend(), xMessageBufferReceive(),
+ * etc.
+ */
+typedef void * MessageBufferHandle_t;
+
+/*-----------------------------------------------------------*/
+
+/**
+ * message_buffer.h
+ *
+ * @code{c}
+ * MessageBufferHandle_t xMessageBufferCreate( size_t xBufferSizeBytes );
+ * @endcode
+ *
+ * Creates a new message buffer using dynamically allocated memory.  See
+ * xMessageBufferCreateStatic() for a version that uses statically allocated
+ * memory (memory that is allocated at compile time).
+ *
+ * configSUPPORT_DYNAMIC_ALLOCATION must be set to 1 or left undefined in
+ * FreeRTOSConfig.h for xMessageBufferCreate() to be available.
+ *
+ * @param xBufferSizeBytes The total number of bytes (not messages) the message
+ * buffer will be able to hold at any one time.  When a message is written to
+ * the message buffer an additional sizeof( size_t ) bytes are also written to
+ * store the message's length.  sizeof( size_t ) is typically 4 bytes on a
+ * 32-bit architecture, so on most 32-bit architectures a 10 byte message will
+ * take up 14 bytes of message buffer space.
+ *
+ * @return If NULL is returned, then the message buffer cannot be created
+ * because there is insufficient heap memory available for FreeRTOS to allocate
+ * the message buffer data structures and storage area.  A non-NULL value being
+ * returned indicates that the message buffer has been created successfully -
+ * the returned value should be stored as the handle to the created message
+ * buffer.
+ *
+ * Example use:
+ * @code{c}
+ *
+ * void vAFunction( void )
+ * {
+ * MessageBufferHandle_t xMessageBuffer;
+ * const size_t xMessageBufferSizeBytes = 100;
+ *
+ *  // Create a message buffer that can hold 100 bytes.  The memory used to hold
+ *  // both the message buffer structure and the messages themselves is allocated
+ *  // dynamically.  Each message added to the buffer consumes an additional 4
+ *  // bytes which are used to hold the lengh of the message.
+ *  xMessageBuffer = xMessageBufferCreate( xMessageBufferSizeBytes );
+ *
+ *  if( xMessageBuffer == NULL )
+ *  {
+ *      // There was not enough heap memory space available to create the
+ *      // message buffer.
+ *  }
+ *  else
+ *  {
+ *      // The message buffer was created successfully and can now be used.
+ *  }
+ *
+ * @endcode
+ * \defgroup xMessageBufferCreate xMessageBufferCreate
+ * \ingroup MessageBufferManagement
+ */
+#define xMessageBufferCreate( xBufferSizeBytes ) \
+    ( MessageBufferHandle_t ) xStreamBufferGenericCreate( xBufferSizeBytes, ( size_t ) 0, pdTRUE )
+
+/**
+ * message_buffer.h
+ *
+ * @code{c}
+ * MessageBufferHandle_t xMessageBufferCreateStatic( size_t xBufferSizeBytes,
+ *                                                uint8_t *pucMessageBufferStorageArea,
+ *                                                StaticMessageBuffer_t *pxStaticMessageBuffer );
+ * @endcode
+ * Creates a new message buffer using statically allocated memory.  See
+ * xMessageBufferCreate() for a version that uses dynamically allocated memory.
+ *
+ * @param xBufferSizeBytes The size, in bytes, of the buffer pointed to by the
+ * pucMessageBufferStorageArea parameter.  When a message is written to the
+ * message buffer an additional sizeof( size_t ) bytes are also written to store
+ * the message's length.  sizeof( size_t ) is typically 4 bytes on a 32-bit
+ * architecture, so on most 32-bit architecture a 10 byte message will take up
+ * 14 bytes of message buffer space.  The maximum number of bytes that can be
+ * stored in the message buffer is actually (xBufferSizeBytes - 1).
+ *
+ * @param pucMessageBufferStorageArea Must point to a uint8_t array that is at
+ * least xBufferSizeBytes big.  This is the array to which messages are
+ * copied when they are written to the message buffer.
+ *
+ * @param pxStaticMessageBuffer Must point to a variable of type
+ * StaticMessageBuffer_t, which will be used to hold the message buffer's data
+ * structure.
+ *
+ * @return If the message buffer is created successfully then a handle to the
+ * created message buffer is returned. If either pucMessageBufferStorageArea or
+ * pxStaticmessageBuffer are NULL then NULL is returned.
+ *
+ * Example use:
+ * @code{c}
+ *
+ * // Used to dimension the array used to hold the messages.  The available space
+ * // will actually be one less than this, so 999.
+ #define STORAGE_SIZE_BYTES 1000
+ *
+ * // Defines the memory that will actually hold the messages within the message
+ * // buffer.
+ * static uint8_t ucStorageBuffer[ STORAGE_SIZE_BYTES ];
+ *
+ * // The variable used to hold the message buffer structure.
+ * StaticMessageBuffer_t xMessageBufferStruct;
+ *
+ * void MyFunction( void )
+ * {
+ * MessageBufferHandle_t xMessageBuffer;
+ *
+ *  xMessageBuffer = xMessageBufferCreateStatic( sizeof( ucStorageBuffer ),
+ *                                               ucStorageBuffer,
+ *                                               &xMessageBufferStruct );
+ *
+ *  // As neither the pucMessageBufferStorageArea or pxStaticMessageBuffer
+ *  // parameters were NULL, xMessageBuffer will not be NULL, and can be used to
+ *  // reference the created message buffer in other message buffer API calls.
+ *
+ *  // Other code that uses the message buffer can go here.
+ * }
+ *
+ * @endcode
+ * \defgroup xMessageBufferCreateStatic xMessageBufferCreateStatic
+ * \ingroup MessageBufferManagement
+ */
+#define xMessageBufferCreateStatic( xBufferSizeBytes, pucMessageBufferStorageArea, pxStaticMessageBuffer ) \
+    ( MessageBufferHandle_t ) xStreamBufferGenericCreateStatic( xBufferSizeBytes, 0, pdTRUE, pucMessageBufferStorageArea, pxStaticMessageBuffer )
+
+/**
+ * message_buffer.h
+ *
+ * @code{c}
+ * size_t xMessageBufferSend( MessageBufferHandle_t xMessageBuffer,
+ *                         const void *pvTxData,
+ *                         size_t xDataLengthBytes,
+ *                         TickType_t xTicksToWait );
+ * @endcode
+ *
+ * Sends a discrete message to the message buffer.  The message can be any
+ * length that fits within the buffer's free space, and is copied into the
+ * buffer.
+ *
+ * ***NOTE***:  Uniquely among FreeRTOS objects, the stream buffer
+ * implementation (so also the message buffer implementation, as message buffers
+ * are built on top of stream buffers) assumes there is only one task or
+ * interrupt that will write to the buffer (the writer), and only one task or
+ * interrupt that will read from the buffer (the reader).  It is safe for the
+ * writer and reader to be different tasks or interrupts, but, unlike other
+ * FreeRTOS objects, it is not safe to have multiple different writers or
+ * multiple different readers.  If there are to be multiple different writers
+ * then the application writer must place each call to a writing API function
+ * (such as xMessageBufferSend()) inside a critical section and set the send
+ * block time to 0.  Likewise, if there are to be multiple different readers
+ * then the application writer must place each call to a reading API function
+ * (such as xMessageBufferRead()) inside a critical section and set the receive
+ * block time to 0.
+ *
+ * Use xMessageBufferSend() to write to a message buffer from a task.  Use
+ * xMessageBufferSendFromISR() to write to a message buffer from an interrupt
+ * service routine (ISR).
+ *
+ * @param xMessageBuffer The handle of the message buffer to which a message is
+ * being sent.
+ *
+ * @param pvTxData A pointer to the message that is to be copied into the
+ * message buffer.
+ *
+ * @param xDataLengthBytes The length of the message.  That is, the number of
+ * bytes to copy from pvTxData into the message buffer.  When a message is
+ * written to the message buffer an additional sizeof( size_t ) bytes are also
+ * written to store the message's length.  sizeof( size_t ) is typically 4 bytes
+ * on a 32-bit architecture, so on most 32-bit architecture setting
+ * xDataLengthBytes to 20 will reduce the free space in the message buffer by 24
+ * bytes (20 bytes of message data and 4 bytes to hold the message length).
+ *
+ * @param xTicksToWait The maximum amount of time the calling task should remain
+ * in the Blocked state to wait for enough space to become available in the
+ * message buffer, should the message buffer have insufficient space when
+ * xMessageBufferSend() is called.  The calling task will never block if
+ * xTicksToWait is zero.  The block time is specified in tick periods, so the
+ * absolute time it represents is dependent on the tick frequency.  The macro
+ * pdMS_TO_TICKS() can be used to convert a time specified in milliseconds into
+ * a time specified in ticks.  Setting xTicksToWait to portMAX_DELAY will cause
+ * the task to wait indefinitely (without timing out), provided
+ * INCLUDE_vTaskSuspend is set to 1 in FreeRTOSConfig.h.  Tasks do not use any
+ * CPU time when they are in the Blocked state.
+ *
+ * @return The number of bytes written to the message buffer.  If the call to
+ * xMessageBufferSend() times out before there was enough space to write the
+ * message into the message buffer then zero is returned.  If the call did not
+ * time out then xDataLengthBytes is returned.
+ *
+ * Example use:
+ * @code{c}
+ * void vAFunction( MessageBufferHandle_t xMessageBuffer )
+ * {
+ * size_t xBytesSent;
+ * uint8_t ucArrayToSend[] = { 0, 1, 2, 3 };
+ * char *pcStringToSend = "String to send";
+ * const TickType_t x100ms = pdMS_TO_TICKS( 100 );
+ *
+ *  // Send an array to the message buffer, blocking for a maximum of 100ms to
+ *  // wait for enough space to be available in the message buffer.
+ *  xBytesSent = xMessageBufferSend( xMessageBuffer, ( void * ) ucArrayToSend, sizeof( ucArrayToSend ), x100ms );
+ *
+ *  if( xBytesSent != sizeof( ucArrayToSend ) )
+ *  {
+ *      // The call to xMessageBufferSend() times out before there was enough
+ *      // space in the buffer for the data to be written.
+ *  }
+ *
+ *  // Send the string to the message buffer.  Return immediately if there is
+ *  // not enough space in the buffer.
+ *  xBytesSent = xMessageBufferSend( xMessageBuffer, ( void * ) pcStringToSend, strlen( pcStringToSend ), 0 );
+ *
+ *  if( xBytesSent != strlen( pcStringToSend ) )
+ *  {
+ *      // The string could not be added to the message buffer because there was
+ *      // not enough free space in the buffer.
+ *  }
+ * }
+ * @endcode
+ * \defgroup xMessageBufferSend xMessageBufferSend
+ * \ingroup MessageBufferManagement
+ */
+#define xMessageBufferSend( xMessageBuffer, pvTxData, xDataLengthBytes, xTicksToWait ) \
+    xStreamBufferSend( ( StreamBufferHandle_t ) xMessageBuffer, pvTxData, xDataLengthBytes, xTicksToWait )
+
+/**
+ * message_buffer.h
+ *
+ * @code{c}
+ * size_t xMessageBufferSendFromISR( MessageBufferHandle_t xMessageBuffer,
+ *                                const void *pvTxData,
+ *                                size_t xDataLengthBytes,
+ *                                BaseType_t *pxHigherPriorityTaskWoken );
+ * @endcode
+ *
+ * Interrupt safe version of the API function that sends a discrete message to
+ * the message buffer.  The message can be any length that fits within the
+ * buffer's free space, and is copied into the buffer.
+ *
+ * ***NOTE***:  Uniquely among FreeRTOS objects, the stream buffer
+ * implementation (so also the message buffer implementation, as message buffers
+ * are built on top of stream buffers) assumes there is only one task or
+ * interrupt that will write to the buffer (the writer), and only one task or
+ * interrupt that will read from the buffer (the reader).  It is safe for the
+ * writer and reader to be different tasks or interrupts, but, unlike other
+ * FreeRTOS objects, it is not safe to have multiple different writers or
+ * multiple different readers.  If there are to be multiple different writers
+ * then the application writer must place each call to a writing API function
+ * (such as xMessageBufferSend()) inside a critical section and set the send
+ * block time to 0.  Likewise, if there are to be multiple different readers
+ * then the application writer must place each call to a reading API function
+ * (such as xMessageBufferRead()) inside a critical section and set the receive
+ * block time to 0.
+ *
+ * Use xMessageBufferSend() to write to a message buffer from a task.  Use
+ * xMessageBufferSendFromISR() to write to a message buffer from an interrupt
+ * service routine (ISR).
+ *
+ * @param xMessageBuffer The handle of the message buffer to which a message is
+ * being sent.
+ *
+ * @param pvTxData A pointer to the message that is to be copied into the
+ * message buffer.
+ *
+ * @param xDataLengthBytes The length of the message.  That is, the number of
+ * bytes to copy from pvTxData into the message buffer.  When a message is
+ * written to the message buffer an additional sizeof( size_t ) bytes are also
+ * written to store the message's length.  sizeof( size_t ) is typically 4 bytes
+ * on a 32-bit architecture, so on most 32-bit architecture setting
+ * xDataLengthBytes to 20 will reduce the free space in the message buffer by 24
+ * bytes (20 bytes of message data and 4 bytes to hold the message length).
+ *
+ * @param pxHigherPriorityTaskWoken  It is possible that a message buffer will
+ * have a task blocked on it waiting for data.  Calling
+ * xMessageBufferSendFromISR() can make data available, and so cause a task that
+ * was waiting for data to leave the Blocked state.  If calling
+ * xMessageBufferSendFromISR() causes a task to leave the Blocked state, and the
+ * unblocked task has a priority higher than the currently executing task (the
+ * task that was interrupted), then, internally, xMessageBufferSendFromISR()
+ * will set *pxHigherPriorityTaskWoken to pdTRUE.  If
+ * xMessageBufferSendFromISR() sets this value to pdTRUE, then normally a
+ * context switch should be performed before the interrupt is exited.  This will
+ * ensure that the interrupt returns directly to the highest priority Ready
+ * state task.  *pxHigherPriorityTaskWoken should be set to pdFALSE before it
+ * is passed into the function.  See the code example below for an example.
+ *
+ * @return The number of bytes actually written to the message buffer.  If the
+ * message buffer didn't have enough free space for the message to be stored
+ * then 0 is returned, otherwise xDataLengthBytes is returned.
+ *
+ * Example use:
+ * @code{c}
+ * // A message buffer that has already been created.
+ * MessageBufferHandle_t xMessageBuffer;
+ *
+ * void vAnInterruptServiceRoutine( void )
+ * {
+ * size_t xBytesSent;
+ * char *pcStringToSend = "String to send";
+ * BaseType_t xHigherPriorityTaskWoken = pdFALSE; // Initialised to pdFALSE.
+ *
+ *  // Attempt to send the string to the message buffer.
+ *  xBytesSent = xMessageBufferSendFromISR( xMessageBuffer,
+ *                                          ( void * ) pcStringToSend,
+ *                                          strlen( pcStringToSend ),
+ *                                          &xHigherPriorityTaskWoken );
+ *
+ *  if( xBytesSent != strlen( pcStringToSend ) )
+ *  {
+ *      // The string could not be added to the message buffer because there was
+ *      // not enough free space in the buffer.
+ *  }
+ *
+ *  // If xHigherPriorityTaskWoken was set to pdTRUE inside
+ *  // xMessageBufferSendFromISR() then a task that has a priority above the
+ *  // priority of the currently executing task was unblocked and a context
+ *  // switch should be performed to ensure the ISR returns to the unblocked
+ *  // task.  In most FreeRTOS ports this is done by simply passing
+ *  // xHigherPriorityTaskWoken into portYIELD_FROM_ISR(), which will test the
+ *  // variables value, and perform the context switch if necessary.  Check the
+ *  // documentation for the port in use for port specific instructions.
+ *  portYIELD_FROM_ISR( xHigherPriorityTaskWoken );
+ * }
+ * @endcode
+ * \defgroup xMessageBufferSendFromISR xMessageBufferSendFromISR
+ * \ingroup MessageBufferManagement
+ */
+#define xMessageBufferSendFromISR( xMessageBuffer, pvTxData, xDataLengthBytes, pxHigherPriorityTaskWoken ) \
+    xStreamBufferSendFromISR( ( StreamBufferHandle_t ) xMessageBuffer, pvTxData, xDataLengthBytes, pxHigherPriorityTaskWoken )
+
+/**
+ * message_buffer.h
+ *
+ * @code{c}
+ * size_t xMessageBufferReceive( MessageBufferHandle_t xMessageBuffer,
+ *                            void *pvRxData,
+ *                            size_t xBufferLengthBytes,
+ *                            TickType_t xTicksToWait );
+ * @endcode
+ *
+ * Receives a discrete message from a message buffer.  Messages can be of
+ * variable length and are copied out of the buffer.
+ *
+ * ***NOTE***:  Uniquely among FreeRTOS objects, the stream buffer
+ * implementation (so also the message buffer implementation, as message buffers
+ * are built on top of stream buffers) assumes there is only one task or
+ * interrupt that will write to the buffer (the writer), and only one task or
+ * interrupt that will read from the buffer (the reader).  It is safe for the
+ * writer and reader to be different tasks or interrupts, but, unlike other
+ * FreeRTOS objects, it is not safe to have multiple different writers or
+ * multiple different readers.  If there are to be multiple different writers
+ * then the application writer must place each call to a writing API function
+ * (such as xMessageBufferSend()) inside a critical section and set the send
+ * block time to 0.  Likewise, if there are to be multiple different readers
+ * then the application writer must place each call to a reading API function
+ * (such as xMessageBufferRead()) inside a critical section and set the receive
+ * block time to 0.
+ *
+ * Use xMessageBufferReceive() to read from a message buffer from a task.  Use
+ * xMessageBufferReceiveFromISR() to read from a message buffer from an
+ * interrupt service routine (ISR).
+ *
+ * @param xMessageBuffer The handle of the message buffer from which a message
+ * is being received.
+ *
+ * @param pvRxData A pointer to the buffer into which the received message is
+ * to be copied.
+ *
+ * @param xBufferLengthBytes The length of the buffer pointed to by the pvRxData
+ * parameter.  This sets the maximum length of the message that can be received.
+ * If xBufferLengthBytes is too small to hold the next message then the message
+ * will be left in the message buffer and 0 will be returned.
+ *
+ * @param xTicksToWait The maximum amount of time the task should remain in the
+ * Blocked state to wait for a message, should the message buffer be empty.
+ * xMessageBufferReceive() will return immediately if xTicksToWait is zero and
+ * the message buffer is empty.  The block time is specified in tick periods, so
+ * the absolute time it represents is dependent on the tick frequency.  The
+ * macro pdMS_TO_TICKS() can be used to convert a time specified in milliseconds
+ * into a time specified in ticks.  Setting xTicksToWait to portMAX_DELAY will
+ * cause the task to wait indefinitely (without timing out), provided
+ * INCLUDE_vTaskSuspend is set to 1 in FreeRTOSConfig.h.  Tasks do not use any
+ * CPU time when they are in the Blocked state.
+ *
+ * @return The length, in bytes, of the message read from the message buffer, if
+ * any.  If xMessageBufferReceive() times out before a message became available
+ * then zero is returned.  If the length of the message is greater than
+ * xBufferLengthBytes then the message will be left in the message buffer and
+ * zero is returned.
+ *
+ * Example use:
+ * @code{c}
+ * void vAFunction( MessageBuffer_t xMessageBuffer )
+ * {
+ * uint8_t ucRxData[ 20 ];
+ * size_t xReceivedBytes;
+ * const TickType_t xBlockTime = pdMS_TO_TICKS( 20 );
+ *
+ *  // Receive the next message from the message buffer.  Wait in the Blocked
+ *  // state (so not using any CPU processing time) for a maximum of 100ms for
+ *  // a message to become available.
+ *  xReceivedBytes = xMessageBufferReceive( xMessageBuffer,
+ *                                          ( void * ) ucRxData,
+ *                                          sizeof( ucRxData ),
+ *                                          xBlockTime );
+ *
+ *  if( xReceivedBytes > 0 )
+ *  {
+ *      // A ucRxData contains a message that is xReceivedBytes long.  Process
+ *      // the message here....
+ *  }
+ * }
+ * @endcode
+ * \defgroup xMessageBufferReceive xMessageBufferReceive
+ * \ingroup MessageBufferManagement
+ */
+#define xMessageBufferReceive( xMessageBuffer, pvRxData, xBufferLengthBytes, xTicksToWait ) \
+    xStreamBufferReceive( ( StreamBufferHandle_t ) xMessageBuffer, pvRxData, xBufferLengthBytes, xTicksToWait )
+
+
+/**
+ * message_buffer.h
+ *
+ * @code{c}
+ * size_t xMessageBufferReceiveFromISR( MessageBufferHandle_t xMessageBuffer,
+ *                                   void *pvRxData,
+ *                                   size_t xBufferLengthBytes,
+ *                                   BaseType_t *pxHigherPriorityTaskWoken );
+ * @endcode
+ *
+ * An interrupt safe version of the API function that receives a discrete
+ * message from a message buffer.  Messages can be of variable length and are
+ * copied out of the buffer.
+ *
+ * ***NOTE***:  Uniquely among FreeRTOS objects, the stream buffer
+ * implementation (so also the message buffer implementation, as message buffers
+ * are built on top of stream buffers) assumes there is only one task or
+ * interrupt that will write to the buffer (the writer), and only one task or
+ * interrupt that will read from the buffer (the reader).  It is safe for the
+ * writer and reader to be different tasks or interrupts, but, unlike other
+ * FreeRTOS objects, it is not safe to have multiple different writers or
+ * multiple different readers.  If there are to be multiple different writers
+ * then the application writer must place each call to a writing API function
+ * (such as xMessageBufferSend()) inside a critical section and set the send
+ * block time to 0.  Likewise, if there are to be multiple different readers
+ * then the application writer must place each call to a reading API function
+ * (such as xMessageBufferRead()) inside a critical section and set the receive
+ * block time to 0.
+ *
+ * Use xMessageBufferReceive() to read from a message buffer from a task.  Use
+ * xMessageBufferReceiveFromISR() to read from a message buffer from an
+ * interrupt service routine (ISR).
+ *
+ * @param xMessageBuffer The handle of the message buffer from which a message
+ * is being received.
+ *
+ * @param pvRxData A pointer to the buffer into which the received message is
+ * to be copied.
+ *
+ * @param xBufferLengthBytes The length of the buffer pointed to by the pvRxData
+ * parameter.  This sets the maximum length of the message that can be received.
+ * If xBufferLengthBytes is too small to hold the next message then the message
+ * will be left in the message buffer and 0 will be returned.
+ *
+ * @param pxHigherPriorityTaskWoken  It is possible that a message buffer will
+ * have a task blocked on it waiting for space to become available.  Calling
+ * xMessageBufferReceiveFromISR() can make space available, and so cause a task
+ * that is waiting for space to leave the Blocked state.  If calling
+ * xMessageBufferReceiveFromISR() causes a task to leave the Blocked state, and
+ * the unblocked task has a priority higher than the currently executing task
+ * (the task that was interrupted), then, internally,
+ * xMessageBufferReceiveFromISR() will set *pxHigherPriorityTaskWoken to pdTRUE.
+ * If xMessageBufferReceiveFromISR() sets this value to pdTRUE, then normally a
+ * context switch should be performed before the interrupt is exited.  That will
+ * ensure the interrupt returns directly to the highest priority Ready state
+ * task.  *pxHigherPriorityTaskWoken should be set to pdFALSE before it is
+ * passed into the function.  See the code example below for an example.
+ *
+ * @return The length, in bytes, of the message read from the message buffer, if
+ * any.
+ *
+ * Example use:
+ * @code{c}
+ * // A message buffer that has already been created.
+ * MessageBuffer_t xMessageBuffer;
+ *
+ * void vAnInterruptServiceRoutine( void )
+ * {
+ * uint8_t ucRxData[ 20 ];
+ * size_t xReceivedBytes;
+ * BaseType_t xHigherPriorityTaskWoken = pdFALSE;  // Initialised to pdFALSE.
+ *
+ *  // Receive the next message from the message buffer.
+ *  xReceivedBytes = xMessageBufferReceiveFromISR( xMessageBuffer,
+ *                                                ( void * ) ucRxData,
+ *                                                sizeof( ucRxData ),
+ *                                                &xHigherPriorityTaskWoken );
+ *
+ *  if( xReceivedBytes > 0 )
+ *  {
+ *      // A ucRxData contains a message that is xReceivedBytes long.  Process
+ *      // the message here....
+ *  }
+ *
+ *  // If xHigherPriorityTaskWoken was set to pdTRUE inside
+ *  // xMessageBufferReceiveFromISR() then a task that has a priority above the
+ *  // priority of the currently executing task was unblocked and a context
+ *  // switch should be performed to ensure the ISR returns to the unblocked
+ *  // task.  In most FreeRTOS ports this is done by simply passing
+ *  // xHigherPriorityTaskWoken into portYIELD_FROM_ISR(), which will test the
+ *  // variables value, and perform the context switch if necessary.  Check the
+ *  // documentation for the port in use for port specific instructions.
+ *  portYIELD_FROM_ISR( xHigherPriorityTaskWoken );
+ * }
+ * @endcode
+ * \defgroup xMessageBufferReceiveFromISR xMessageBufferReceiveFromISR
+ * \ingroup MessageBufferManagement
+ */
+#define xMessageBufferReceiveFromISR( xMessageBuffer, pvRxData, xBufferLengthBytes, pxHigherPriorityTaskWoken ) \
+    xStreamBufferReceiveFromISR( ( StreamBufferHandle_t ) xMessageBuffer, pvRxData, xBufferLengthBytes, pxHigherPriorityTaskWoken )
+
+/**
+ * message_buffer.h
+ *
+ * @code{c}
+ * void vMessageBufferDelete( MessageBufferHandle_t xMessageBuffer );
+ * @endcode
+ *
+ * Deletes a message buffer that was previously created using a call to
+ * xMessageBufferCreate() or xMessageBufferCreateStatic().  If the message
+ * buffer was created using dynamic memory (that is, by xMessageBufferCreate()),
+ * then the allocated memory is freed.
+ *
+ * A message buffer handle must not be used after the message buffer has been
+ * deleted.
+ *
+ * @param xMessageBuffer The handle of the message buffer to be deleted.
+ *
+ */
+#define vMessageBufferDelete( xMessageBuffer ) \
+    vStreamBufferDelete( ( StreamBufferHandle_t ) xMessageBuffer )
+
+/**
+ * message_buffer.h
+ * @code{c}
+ * BaseType_t xMessageBufferIsFull( MessageBufferHandle_t xMessageBuffer );
+ * @endcode
+ *
+ * Tests to see if a message buffer is full.  A message buffer is full if it
+ * cannot accept any more messages, of any size, until space is made available
+ * by a message being removed from the message buffer.
+ *
+ * @param xMessageBuffer The handle of the message buffer being queried.
+ *
+ * @return If the message buffer referenced by xMessageBuffer is full then
+ * pdTRUE is returned.  Otherwise pdFALSE is returned.
+ */
+#define xMessageBufferIsFull( xMessageBuffer ) \
+    xStreamBufferIsFull( ( StreamBufferHandle_t ) xMessageBuffer )
+
+/**
+ * message_buffer.h
+ * @code{c}
+ * BaseType_t xMessageBufferIsEmpty( MessageBufferHandle_t xMessageBuffer );
+ * @endcode
+ *
+ * Tests to see if a message buffer is empty (does not contain any messages).
+ *
+ * @param xMessageBuffer The handle of the message buffer being queried.
+ *
+ * @return If the message buffer referenced by xMessageBuffer is empty then
+ * pdTRUE is returned.  Otherwise pdFALSE is returned.
+ *
+ */
+#define xMessageBufferIsEmpty( xMessageBuffer ) \
+    xStreamBufferIsEmpty( ( StreamBufferHandle_t ) xMessageBuffer )
+
+/**
+ * message_buffer.h
+ * @code{c}
+ * BaseType_t xMessageBufferReset( MessageBufferHandle_t xMessageBuffer );
+ * @endcode
+ *
+ * Resets a message buffer to its initial empty state, discarding any message it
+ * contained.
+ *
+ * A message buffer can only be reset if there are no tasks blocked on it.
+ *
+ * @param xMessageBuffer The handle of the message buffer being reset.
+ *
+ * @return If the message buffer was reset then pdPASS is returned.  If the
+ * message buffer could not be reset because either there was a task blocked on
+ * the message queue to wait for space to become available, or to wait for a
+ * a message to be available, then pdFAIL is returned.
+ *
+ * \defgroup xMessageBufferReset xMessageBufferReset
+ * \ingroup MessageBufferManagement
+ */
+#define xMessageBufferReset( xMessageBuffer ) \
+    xStreamBufferReset( ( StreamBufferHandle_t ) xMessageBuffer )
+
+
+/**
+ * message_buffer.h
+ * @code{c}
+ * size_t xMessageBufferSpaceAvailable( MessageBufferHandle_t xMessageBuffer );
+ * @endcode
+ * Returns the number of bytes of free space in the message buffer.
+ *
+ * @param xMessageBuffer The handle of the message buffer being queried.
+ *
+ * @return The number of bytes that can be written to the message buffer before
+ * the message buffer would be full.  When a message is written to the message
+ * buffer an additional sizeof( size_t ) bytes are also written to store the
+ * message's length.  sizeof( size_t ) is typically 4 bytes on a 32-bit
+ * architecture, so if xMessageBufferSpacesAvailable() returns 10, then the size
+ * of the largest message that can be written to the message buffer is 6 bytes.
+ *
+ * \defgroup xMessageBufferSpaceAvailable xMessageBufferSpaceAvailable
+ * \ingroup MessageBufferManagement
+ */
+#define xMessageBufferSpaceAvailable( xMessageBuffer ) \
+    xStreamBufferSpacesAvailable( ( StreamBufferHandle_t ) xMessageBuffer )
+#define xMessageBufferSpacesAvailable( xMessageBuffer ) \
+    xStreamBufferSpacesAvailable( ( StreamBufferHandle_t ) xMessageBuffer ) /* Corrects typo in original macro name. */
+
+/**
+ * message_buffer.h
+ * @code{c}
+ * size_t xMessageBufferNextLengthBytes( MessageBufferHandle_t xMessageBuffer );
+ * @endcode
+ * Returns the length (in bytes) of the next message in a message buffer.
+ * Useful if xMessageBufferReceive() returned 0 because the size of the buffer
+ * passed into xMessageBufferReceive() was too small to hold the next message.
+ *
+ * @param xMessageBuffer The handle of the message buffer being queried.
+ *
+ * @return The length (in bytes) of the next message in the message buffer, or 0
+ * if the message buffer is empty.
+ *
+ * \defgroup xMessageBufferNextLengthBytes xMessageBufferNextLengthBytes
+ * \ingroup MessageBufferManagement
+ */
+#define xMessageBufferNextLengthBytes( xMessageBuffer ) \
+    xStreamBufferNextMessageLengthBytes( ( StreamBufferHandle_t ) xMessageBuffer ) PRIVILEGED_FUNCTION;
+
+/**
+ * message_buffer.h
+ *
+ * @code{c}
+ * BaseType_t xMessageBufferSendCompletedFromISR( MessageBufferHandle_t xMessageBuffer, BaseType_t *pxHigherPriorityTaskWoken );
+ * @endcode
+ *
+ * For advanced users only.
+ *
+ * The sbSEND_COMPLETED() macro is called from within the FreeRTOS APIs when
+ * data is sent to a message buffer or stream buffer.  If there was a task that
+ * was blocked on the message or stream buffer waiting for data to arrive then
+ * the sbSEND_COMPLETED() macro sends a notification to the task to remove it
+ * from the Blocked state.  xMessageBufferSendCompletedFromISR() does the same
+ * thing.  It is provided to enable application writers to implement their own
+ * version of sbSEND_COMPLETED(), and MUST NOT BE USED AT ANY OTHER TIME.
+ *
+ * See the example implemented in FreeRTOS/Demo/Minimal/MessageBufferAMP.c for
+ * additional information.
+ *
+ * @param xMessageBuffer The handle of the stream buffer to which data was
+ * written.
+ *
+ * @param pxHigherPriorityTaskWoken *pxHigherPriorityTaskWoken should be
+ * initialised to pdFALSE before it is passed into
+ * xMessageBufferSendCompletedFromISR().  If calling
+ * xMessageBufferSendCompletedFromISR() removes a task from the Blocked state,
+ * and the task has a priority above the priority of the currently running task,
+ * then *pxHigherPriorityTaskWoken will get set to pdTRUE indicating that a
+ * context switch should be performed before exiting the ISR.
+ *
+ * @return If a task was removed from the Blocked state then pdTRUE is returned.
+ * Otherwise pdFALSE is returned.
+ *
+ * \defgroup xMessageBufferSendCompletedFromISR xMessageBufferSendCompletedFromISR
+ * \ingroup StreamBufferManagement
+ */
+#define xMessageBufferSendCompletedFromISR( xMessageBuffer, pxHigherPriorityTaskWoken ) \
+    xStreamBufferSendCompletedFromISR( ( StreamBufferHandle_t ) xMessageBuffer, pxHigherPriorityTaskWoken )
+
+/**
+ * message_buffer.h
+ *
+ * @code{c}
+ * BaseType_t xMessageBufferReceiveCompletedFromISR( MessageBufferHandle_t xMessageBuffer, BaseType_t *pxHigherPriorityTaskWoken );
+ * @endcode
+ *
+ * For advanced users only.
+ *
+ * The sbRECEIVE_COMPLETED() macro is called from within the FreeRTOS APIs when
+ * data is read out of a message buffer or stream buffer.  If there was a task
+ * that was blocked on the message or stream buffer waiting for data to arrive
+ * then the sbRECEIVE_COMPLETED() macro sends a notification to the task to
+ * remove it from the Blocked state.  xMessageBufferReceiveCompletedFromISR()
+ * does the same thing.  It is provided to enable application writers to
+ * implement their own version of sbRECEIVE_COMPLETED(), and MUST NOT BE USED AT
+ * ANY OTHER TIME.
+ *
+ * See the example implemented in FreeRTOS/Demo/Minimal/MessageBufferAMP.c for
+ * additional information.
+ *
+ * @param xMessageBuffer The handle of the stream buffer from which data was
+ * read.
+ *
+ * @param pxHigherPriorityTaskWoken *pxHigherPriorityTaskWoken should be
+ * initialised to pdFALSE before it is passed into
+ * xMessageBufferReceiveCompletedFromISR().  If calling
+ * xMessageBufferReceiveCompletedFromISR() removes a task from the Blocked state,
+ * and the task has a priority above the priority of the currently running task,
+ * then *pxHigherPriorityTaskWoken will get set to pdTRUE indicating that a
+ * context switch should be performed before exiting the ISR.
+ *
+ * @return If a task was removed from the Blocked state then pdTRUE is returned.
+ * Otherwise pdFALSE is returned.
+ *
+ * \defgroup xMessageBufferReceiveCompletedFromISR xMessageBufferReceiveCompletedFromISR
+ * \ingroup StreamBufferManagement
+ */
+#define xMessageBufferReceiveCompletedFromISR( xMessageBuffer, pxHigherPriorityTaskWoken ) \
+    xStreamBufferReceiveCompletedFromISR( ( StreamBufferHandle_t ) xMessageBuffer, pxHigherPriorityTaskWoken )
+
+/* *INDENT-OFF* */
+#if defined( __cplusplus )
+    } /* extern "C" */
+#endif
+/* *INDENT-ON* */
+
+#endif /* !defined( FREERTOS_MESSAGE_BUFFER_H ) */

prj/TCPClient/FreeRTOS/include/mpu_prototypes.h

@@ -0,0 +1,260 @@
+/*
+ * FreeRTOS Kernel V10.4.6
+ * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * https://www.FreeRTOS.org
+ * https://github.com/FreeRTOS
+ *
+ */
+
+/*
+ * When the MPU is used the standard (non MPU) API functions are mapped to
+ * equivalents that start "MPU_", the prototypes for which are defined in this
+ * header files.  This will cause the application code to call the MPU_ version
+ * which wraps the non-MPU version with privilege promoting then demoting code,
+ * so the kernel code always runs will full privileges.
+ */
+
+
+#ifndef MPU_PROTOTYPES_H
+#define MPU_PROTOTYPES_H
+
+/* MPU versions of tasks.h API functions. */
+BaseType_t MPU_xTaskCreate( TaskFunction_t pxTaskCode,
+                            const char * const pcName,
+                            const uint16_t usStackDepth,
+                            void * const pvParameters,
+                            UBaseType_t uxPriority,
+                            TaskHandle_t * const pxCreatedTask ) FREERTOS_SYSTEM_CALL;
+TaskHandle_t MPU_xTaskCreateStatic( TaskFunction_t pxTaskCode,
+                                    const char * const pcName,
+                                    const uint32_t ulStackDepth,
+                                    void * const pvParameters,
+                                    UBaseType_t uxPriority,
+                                    StackType_t * const puxStackBuffer,
+                                    StaticTask_t * const pxTaskBuffer ) FREERTOS_SYSTEM_CALL;
+void MPU_vTaskDelete( TaskHandle_t xTaskToDelete ) FREERTOS_SYSTEM_CALL;
+void MPU_vTaskDelay( const TickType_t xTicksToDelay ) FREERTOS_SYSTEM_CALL;
+BaseType_t MPU_xTaskDelayUntil( TickType_t * const pxPreviousWakeTime,
+                                const TickType_t xTimeIncrement ) FREERTOS_SYSTEM_CALL;
+BaseType_t MPU_xTaskAbortDelay( TaskHandle_t xTask ) FREERTOS_SYSTEM_CALL;
+UBaseType_t MPU_uxTaskPriorityGet( const TaskHandle_t xTask ) FREERTOS_SYSTEM_CALL;
+eTaskState MPU_eTaskGetState( TaskHandle_t xTask ) FREERTOS_SYSTEM_CALL;
+void MPU_vTaskGetInfo( TaskHandle_t xTask,
+                       TaskStatus_t * pxTaskStatus,
+                       BaseType_t xGetFreeStackSpace,
+                       eTaskState eState ) FREERTOS_SYSTEM_CALL;
+void MPU_vTaskPrioritySet( TaskHandle_t xTask,
+                           UBaseType_t uxNewPriority ) FREERTOS_SYSTEM_CALL;
+void MPU_vTaskSuspend( TaskHandle_t xTaskToSuspend ) FREERTOS_SYSTEM_CALL;
+void MPU_vTaskResume( TaskHandle_t xTaskToResume ) FREERTOS_SYSTEM_CALL;
+void MPU_vTaskStartScheduler( void ) FREERTOS_SYSTEM_CALL;
+void MPU_vTaskSuspendAll( void ) FREERTOS_SYSTEM_CALL;
+BaseType_t MPU_xTaskResumeAll( void ) FREERTOS_SYSTEM_CALL;
+TickType_t MPU_xTaskGetTickCount( void ) FREERTOS_SYSTEM_CALL;
+UBaseType_t MPU_uxTaskGetNumberOfTasks( void ) FREERTOS_SYSTEM_CALL;
+char * MPU_pcTaskGetName( TaskHandle_t xTaskToQuery ) FREERTOS_SYSTEM_CALL;
+TaskHandle_t MPU_xTaskGetHandle( const char * pcNameToQuery ) FREERTOS_SYSTEM_CALL;
+UBaseType_t MPU_uxTaskGetStackHighWaterMark( TaskHandle_t xTask ) FREERTOS_SYSTEM_CALL;
+configSTACK_DEPTH_TYPE MPU_uxTaskGetStackHighWaterMark2( TaskHandle_t xTask ) FREERTOS_SYSTEM_CALL;
+void MPU_vTaskSetApplicationTaskTag( TaskHandle_t xTask,
+                                     TaskHookFunction_t pxHookFunction ) FREERTOS_SYSTEM_CALL;
+TaskHookFunction_t MPU_xTaskGetApplicationTaskTag( TaskHandle_t xTask ) FREERTOS_SYSTEM_CALL;
+void MPU_vTaskSetThreadLocalStoragePointer( TaskHandle_t xTaskToSet,
+                                            BaseType_t xIndex,
+                                            void * pvValue ) FREERTOS_SYSTEM_CALL;
+void * MPU_pvTaskGetThreadLocalStoragePointer( TaskHandle_t xTaskToQuery,
+                                               BaseType_t xIndex ) FREERTOS_SYSTEM_CALL;
+BaseType_t MPU_xTaskCallApplicationTaskHook( TaskHandle_t xTask,
+                                             void * pvParameter ) FREERTOS_SYSTEM_CALL;
+TaskHandle_t MPU_xTaskGetIdleTaskHandle( void ) FREERTOS_SYSTEM_CALL;
+UBaseType_t MPU_uxTaskGetSystemState( TaskStatus_t * const pxTaskStatusArray,
+                                      const UBaseType_t uxArraySize,
+                                      configRUN_TIME_COUNTER_TYPE * const pulTotalRunTime ) FREERTOS_SYSTEM_CALL;
+configRUN_TIME_COUNTER_TYPE MPU_ulTaskGetIdleRunTimeCounter( void ) FREERTOS_SYSTEM_CALL;
+configRUN_TIME_COUNTER_TYPE MPU_ulTaskGetIdleRunTimePercent( void ) FREERTOS_SYSTEM_CALL;
+void MPU_vTaskList( char * pcWriteBuffer ) FREERTOS_SYSTEM_CALL;
+void MPU_vTaskGetRunTimeStats( char * pcWriteBuffer ) FREERTOS_SYSTEM_CALL;
+BaseType_t MPU_xTaskGenericNotify( TaskHandle_t xTaskToNotify,
+                                   UBaseType_t uxIndexToNotify,
+                                   uint32_t ulValue,
+                                   eNotifyAction eAction,
+                                   uint32_t * pulPreviousNotificationValue ) FREERTOS_SYSTEM_CALL;
+BaseType_t MPU_xTaskGenericNotifyWait( UBaseType_t uxIndexToWaitOn,
+                                       uint32_t ulBitsToClearOnEntry,
+                                       uint32_t ulBitsToClearOnExit,
+                                       uint32_t * pulNotificationValue,
+                                       TickType_t xTicksToWait ) FREERTOS_SYSTEM_CALL;
+uint32_t MPU_ulTaskGenericNotifyTake( UBaseType_t uxIndexToWaitOn,
+                                      BaseType_t xClearCountOnExit,
+                                      TickType_t xTicksToWait ) FREERTOS_SYSTEM_CALL;
+BaseType_t MPU_xTaskGenericNotifyStateClear( TaskHandle_t xTask,
+                                             UBaseType_t uxIndexToClear ) FREERTOS_SYSTEM_CALL;
+uint32_t MPU_ulTaskGenericNotifyValueClear( TaskHandle_t xTask,
+                                            UBaseType_t uxIndexToClear,
+                                            uint32_t ulBitsToClear ) FREERTOS_SYSTEM_CALL;
+BaseType_t MPU_xTaskIncrementTick( void ) FREERTOS_SYSTEM_CALL;
+TaskHandle_t MPU_xTaskGetCurrentTaskHandle( void ) FREERTOS_SYSTEM_CALL;
+void MPU_vTaskSetTimeOutState( TimeOut_t * const pxTimeOut ) FREERTOS_SYSTEM_CALL;
+BaseType_t MPU_xTaskCheckForTimeOut( TimeOut_t * const pxTimeOut,
+                                     TickType_t * const pxTicksToWait ) FREERTOS_SYSTEM_CALL;
+void MPU_vTaskMissedYield( void ) FREERTOS_SYSTEM_CALL;
+BaseType_t MPU_xTaskGetSchedulerState( void ) FREERTOS_SYSTEM_CALL;
+BaseType_t MPU_xTaskCatchUpTicks( TickType_t xTicksToCatchUp ) FREERTOS_SYSTEM_CALL;
+
+/* MPU versions of queue.h API functions. */
+BaseType_t MPU_xQueueGenericSend( QueueHandle_t xQueue,
+                                  const void * const pvItemToQueue,
+                                  TickType_t xTicksToWait,
+                                  const BaseType_t xCopyPosition ) FREERTOS_SYSTEM_CALL;
+BaseType_t MPU_xQueueReceive( QueueHandle_t xQueue,
+                              void * const pvBuffer,
+                              TickType_t xTicksToWait ) FREERTOS_SYSTEM_CALL;
+BaseType_t MPU_xQueuePeek( QueueHandle_t xQueue,
+                           void * const pvBuffer,
+                           TickType_t xTicksToWait ) FREERTOS_SYSTEM_CALL;
+BaseType_t MPU_xQueueSemaphoreTake( QueueHandle_t xQueue,
+                                    TickType_t xTicksToWait ) FREERTOS_SYSTEM_CALL;
+UBaseType_t MPU_uxQueueMessagesWaiting( const QueueHandle_t xQueue ) FREERTOS_SYSTEM_CALL;
+UBaseType_t MPU_uxQueueSpacesAvailable( const QueueHandle_t xQueue ) FREERTOS_SYSTEM_CALL;
+void MPU_vQueueDelete( QueueHandle_t xQueue ) FREERTOS_SYSTEM_CALL;
+QueueHandle_t MPU_xQueueCreateMutex( const uint8_t ucQueueType ) FREERTOS_SYSTEM_CALL;
+QueueHandle_t MPU_xQueueCreateMutexStatic( const uint8_t ucQueueType,
+                                           StaticQueue_t * pxStaticQueue ) FREERTOS_SYSTEM_CALL;
+QueueHandle_t MPU_xQueueCreateCountingSemaphore( const UBaseType_t uxMaxCount,
+                                                 const UBaseType_t uxInitialCount ) FREERTOS_SYSTEM_CALL;
+QueueHandle_t MPU_xQueueCreateCountingSemaphoreStatic( const UBaseType_t uxMaxCount,
+                                                       const UBaseType_t uxInitialCount,
+                                                       StaticQueue_t * pxStaticQueue ) FREERTOS_SYSTEM_CALL;
+TaskHandle_t MPU_xQueueGetMutexHolder( QueueHandle_t xSemaphore ) FREERTOS_SYSTEM_CALL;
+BaseType_t MPU_xQueueTakeMutexRecursive( QueueHandle_t xMutex,
+                                         TickType_t xTicksToWait ) FREERTOS_SYSTEM_CALL;
+BaseType_t MPU_xQueueGiveMutexRecursive( QueueHandle_t pxMutex ) FREERTOS_SYSTEM_CALL;
+void MPU_vQueueAddToRegistry( QueueHandle_t xQueue,
+                              const char * pcName ) FREERTOS_SYSTEM_CALL;
+void MPU_vQueueUnregisterQueue( QueueHandle_t xQueue ) FREERTOS_SYSTEM_CALL;
+const char * MPU_pcQueueGetName( QueueHandle_t xQueue ) FREERTOS_SYSTEM_CALL;
+QueueHandle_t MPU_xQueueGenericCreate( const UBaseType_t uxQueueLength,
+                                       const UBaseType_t uxItemSize,
+                                       const uint8_t ucQueueType ) FREERTOS_SYSTEM_CALL;
+QueueHandle_t MPU_xQueueGenericCreateStatic( const UBaseType_t uxQueueLength,
+                                             const UBaseType_t uxItemSize,
+                                             uint8_t * pucQueueStorage,
+                                             StaticQueue_t * pxStaticQueue,
+                                             const uint8_t ucQueueType ) FREERTOS_SYSTEM_CALL;
+QueueSetHandle_t MPU_xQueueCreateSet( const UBaseType_t uxEventQueueLength ) FREERTOS_SYSTEM_CALL;
+BaseType_t MPU_xQueueAddToSet( QueueSetMemberHandle_t xQueueOrSemaphore,
+                               QueueSetHandle_t xQueueSet ) FREERTOS_SYSTEM_CALL;
+BaseType_t MPU_xQueueRemoveFromSet( QueueSetMemberHandle_t xQueueOrSemaphore,
+                                    QueueSetHandle_t xQueueSet ) FREERTOS_SYSTEM_CALL;
+QueueSetMemberHandle_t MPU_xQueueSelectFromSet( QueueSetHandle_t xQueueSet,
+                                                const TickType_t xTicksToWait ) FREERTOS_SYSTEM_CALL;
+BaseType_t MPU_xQueueGenericReset( QueueHandle_t xQueue,
+                                   BaseType_t xNewQueue ) FREERTOS_SYSTEM_CALL;
+void MPU_vQueueSetQueueNumber( QueueHandle_t xQueue,
+                               UBaseType_t uxQueueNumber ) FREERTOS_SYSTEM_CALL;
+UBaseType_t MPU_uxQueueGetQueueNumber( QueueHandle_t xQueue ) FREERTOS_SYSTEM_CALL;
+uint8_t MPU_ucQueueGetQueueType( QueueHandle_t xQueue ) FREERTOS_SYSTEM_CALL;
+
+/* MPU versions of timers.h API functions. */
+TimerHandle_t MPU_xTimerCreate( const char * const pcTimerName,
+                                const TickType_t xTimerPeriodInTicks,
+                                const UBaseType_t uxAutoReload,
+                                void * const pvTimerID,
+                                TimerCallbackFunction_t pxCallbackFunction ) FREERTOS_SYSTEM_CALL;
+TimerHandle_t MPU_xTimerCreateStatic( const char * const pcTimerName,
+                                      const TickType_t xTimerPeriodInTicks,
+                                      const UBaseType_t uxAutoReload,
+                                      void * const pvTimerID,
+                                      TimerCallbackFunction_t pxCallbackFunction,
+                                      StaticTimer_t * pxTimerBuffer ) FREERTOS_SYSTEM_CALL;
+void * MPU_pvTimerGetTimerID( const TimerHandle_t xTimer ) FREERTOS_SYSTEM_CALL;
+void MPU_vTimerSetTimerID( TimerHandle_t xTimer,
+                           void * pvNewID ) FREERTOS_SYSTEM_CALL;
+BaseType_t MPU_xTimerIsTimerActive( TimerHandle_t xTimer ) FREERTOS_SYSTEM_CALL;
+TaskHandle_t MPU_xTimerGetTimerDaemonTaskHandle( void ) FREERTOS_SYSTEM_CALL;
+BaseType_t MPU_xTimerPendFunctionCall( PendedFunction_t xFunctionToPend,
+                                       void * pvParameter1,
+                                       uint32_t ulParameter2,
+                                       TickType_t xTicksToWait ) FREERTOS_SYSTEM_CALL;
+const char * MPU_pcTimerGetName( TimerHandle_t xTimer ) FREERTOS_SYSTEM_CALL;
+void MPU_vTimerSetReloadMode( TimerHandle_t xTimer,
+                              const UBaseType_t uxAutoReload ) FREERTOS_SYSTEM_CALL;
+UBaseType_t MPU_uxTimerGetReloadMode( TimerHandle_t xTimer ) FREERTOS_SYSTEM_CALL;
+TickType_t MPU_xTimerGetPeriod( TimerHandle_t xTimer ) FREERTOS_SYSTEM_CALL;
+TickType_t MPU_xTimerGetExpiryTime( TimerHandle_t xTimer ) FREERTOS_SYSTEM_CALL;
+BaseType_t MPU_xTimerCreateTimerTask( void ) FREERTOS_SYSTEM_CALL;
+BaseType_t MPU_xTimerGenericCommand( TimerHandle_t xTimer,
+                                     const BaseType_t xCommandID,
+                                     const TickType_t xOptionalValue,
+                                     BaseType_t * const pxHigherPriorityTaskWoken,
+                                     const TickType_t xTicksToWait ) FREERTOS_SYSTEM_CALL;
+
+/* MPU versions of event_group.h API functions. */
+EventGroupHandle_t MPU_xEventGroupCreate( void ) FREERTOS_SYSTEM_CALL;
+EventGroupHandle_t MPU_xEventGroupCreateStatic( StaticEventGroup_t * pxEventGroupBuffer ) FREERTOS_SYSTEM_CALL;
+EventBits_t MPU_xEventGroupWaitBits( EventGroupHandle_t xEventGroup,
+                                     const EventBits_t uxBitsToWaitFor,
+                                     const BaseType_t xClearOnExit,
+                                     const BaseType_t xWaitForAllBits,
+                                     TickType_t xTicksToWait ) FREERTOS_SYSTEM_CALL;
+EventBits_t MPU_xEventGroupClearBits( EventGroupHandle_t xEventGroup,
+                                      const EventBits_t uxBitsToClear ) FREERTOS_SYSTEM_CALL;
+EventBits_t MPU_xEventGroupSetBits( EventGroupHandle_t xEventGroup,
+                                    const EventBits_t uxBitsToSet ) FREERTOS_SYSTEM_CALL;
+EventBits_t MPU_xEventGroupSync( EventGroupHandle_t xEventGroup,
+                                 const EventBits_t uxBitsToSet,
+                                 const EventBits_t uxBitsToWaitFor,
+                                 TickType_t xTicksToWait ) FREERTOS_SYSTEM_CALL;
+void MPU_vEventGroupDelete( EventGroupHandle_t xEventGroup ) FREERTOS_SYSTEM_CALL;
+UBaseType_t MPU_uxEventGroupGetNumber( void * xEventGroup ) FREERTOS_SYSTEM_CALL;
+
+/* MPU versions of message/stream_buffer.h API functions. */
+size_t MPU_xStreamBufferSend( StreamBufferHandle_t xStreamBuffer,
+                              const void * pvTxData,
+                              size_t xDataLengthBytes,
+                              TickType_t xTicksToWait ) FREERTOS_SYSTEM_CALL;
+size_t MPU_xStreamBufferReceive( StreamBufferHandle_t xStreamBuffer,
+                                 void * pvRxData,
+                                 size_t xBufferLengthBytes,
+                                 TickType_t xTicksToWait ) FREERTOS_SYSTEM_CALL;
+size_t MPU_xStreamBufferNextMessageLengthBytes( StreamBufferHandle_t xStreamBuffer ) FREERTOS_SYSTEM_CALL;
+void MPU_vStreamBufferDelete( StreamBufferHandle_t xStreamBuffer ) FREERTOS_SYSTEM_CALL;
+BaseType_t MPU_xStreamBufferIsFull( StreamBufferHandle_t xStreamBuffer ) FREERTOS_SYSTEM_CALL;
+BaseType_t MPU_xStreamBufferIsEmpty( StreamBufferHandle_t xStreamBuffer ) FREERTOS_SYSTEM_CALL;
+BaseType_t MPU_xStreamBufferReset( StreamBufferHandle_t xStreamBuffer ) FREERTOS_SYSTEM_CALL;
+size_t MPU_xStreamBufferSpacesAvailable( StreamBufferHandle_t xStreamBuffer ) FREERTOS_SYSTEM_CALL;
+size_t MPU_xStreamBufferBytesAvailable( StreamBufferHandle_t xStreamBuffer ) FREERTOS_SYSTEM_CALL;
+BaseType_t MPU_xStreamBufferSetTriggerLevel( StreamBufferHandle_t xStreamBuffer,
+                                             size_t xTriggerLevel ) FREERTOS_SYSTEM_CALL;
+StreamBufferHandle_t MPU_xStreamBufferGenericCreate( size_t xBufferSizeBytes,
+                                                     size_t xTriggerLevelBytes,
+                                                     BaseType_t xIsMessageBuffer ) FREERTOS_SYSTEM_CALL;
+StreamBufferHandle_t MPU_xStreamBufferGenericCreateStatic( size_t xBufferSizeBytes,
+                                                           size_t xTriggerLevelBytes,
+                                                           BaseType_t xIsMessageBuffer,
+                                                           uint8_t * const pucStreamBufferStorageArea,
+                                                           StaticStreamBuffer_t * const pxStaticStreamBuffer ) FREERTOS_SYSTEM_CALL;
+
+
+
+#endif /* MPU_PROTOTYPES_H */

prj/TCPClient/FreeRTOS/include/mpu_wrappers.h

@@ -0,0 +1,217 @@
+/*
+ * FreeRTOS Kernel V10.4.6
+ * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * https://www.FreeRTOS.org
+ * https://github.com/FreeRTOS
+ *
+ */
+
+#ifndef MPU_WRAPPERS_H
+#define MPU_WRAPPERS_H
+
+/* This file redefines API functions to be called through a wrapper macro, but
+ * only for ports that are using the MPU. */
+#if ( portUSING_MPU_WRAPPERS == 1 )
+
+/* MPU_WRAPPERS_INCLUDED_FROM_API_FILE will be defined when this file is
+ * included from queue.c or task.c to prevent it from having an effect within
+ * those files. */
+    #ifndef MPU_WRAPPERS_INCLUDED_FROM_API_FILE
+
+/*
+ * Map standard (non MPU) API functions to equivalents that start
+ * "MPU_".  This will cause the application code to call the MPU_
+ * version, which wraps the non-MPU version with privilege promoting
+ * then demoting code, so the kernel code always runs will full
+ * privileges.
+ */
+
+/* Map standard tasks.h API functions to the MPU equivalents. */
+        #define xTaskCreate                            MPU_xTaskCreate
+        #define xTaskCreateStatic                      MPU_xTaskCreateStatic
+        #define vTaskDelete                            MPU_vTaskDelete
+        #define vTaskDelay                             MPU_vTaskDelay
+        #define xTaskDelayUntil                        MPU_xTaskDelayUntil
+        #define xTaskAbortDelay                        MPU_xTaskAbortDelay
+        #define uxTaskPriorityGet                      MPU_uxTaskPriorityGet
+        #define eTaskGetState                          MPU_eTaskGetState
+        #define vTaskGetInfo                           MPU_vTaskGetInfo
+        #define vTaskPrioritySet                       MPU_vTaskPrioritySet
+        #define vTaskSuspend                           MPU_vTaskSuspend
+        #define vTaskResume                            MPU_vTaskResume
+        #define vTaskSuspendAll                        MPU_vTaskSuspendAll
+        #define xTaskResumeAll                         MPU_xTaskResumeAll
+        #define xTaskGetTickCount                      MPU_xTaskGetTickCount
+        #define uxTaskGetNumberOfTasks                 MPU_uxTaskGetNumberOfTasks
+        #define pcTaskGetName                          MPU_pcTaskGetName
+        #define xTaskGetHandle                         MPU_xTaskGetHandle
+        #define uxTaskGetStackHighWaterMark            MPU_uxTaskGetStackHighWaterMark
+        #define uxTaskGetStackHighWaterMark2           MPU_uxTaskGetStackHighWaterMark2
+        #define vTaskSetApplicationTaskTag             MPU_vTaskSetApplicationTaskTag
+        #define xTaskGetApplicationTaskTag             MPU_xTaskGetApplicationTaskTag
+        #define vTaskSetThreadLocalStoragePointer      MPU_vTaskSetThreadLocalStoragePointer
+        #define pvTaskGetThreadLocalStoragePointer     MPU_pvTaskGetThreadLocalStoragePointer
+        #define xTaskCallApplicationTaskHook           MPU_xTaskCallApplicationTaskHook
+        #define xTaskGetIdleTaskHandle                 MPU_xTaskGetIdleTaskHandle
+        #define uxTaskGetSystemState                   MPU_uxTaskGetSystemState
+        #define vTaskList                              MPU_vTaskList
+        #define vTaskGetRunTimeStats                   MPU_vTaskGetRunTimeStats
+        #define ulTaskGetIdleRunTimeCounter            MPU_ulTaskGetIdleRunTimeCounter
+        #define ulTaskGetIdleRunTimePercent            MPU_ulTaskGetIdleRunTimePercent
+        #define xTaskGenericNotify                     MPU_xTaskGenericNotify
+        #define xTaskGenericNotifyWait                 MPU_xTaskGenericNotifyWait
+        #define ulTaskGenericNotifyTake                MPU_ulTaskGenericNotifyTake
+        #define xTaskGenericNotifyStateClear           MPU_xTaskGenericNotifyStateClear
+        #define ulTaskGenericNotifyValueClear          MPU_ulTaskGenericNotifyValueClear
+        #define xTaskCatchUpTicks                      MPU_xTaskCatchUpTicks
+
+        #define xTaskGetCurrentTaskHandle              MPU_xTaskGetCurrentTaskHandle
+        #define vTaskSetTimeOutState                   MPU_vTaskSetTimeOutState
+        #define xTaskCheckForTimeOut                   MPU_xTaskCheckForTimeOut
+        #define xTaskGetSchedulerState                 MPU_xTaskGetSchedulerState
+
+/* Map standard queue.h API functions to the MPU equivalents. */
+        #define xQueueGenericSend                      MPU_xQueueGenericSend
+        #define xQueueReceive                          MPU_xQueueReceive
+        #define xQueuePeek                             MPU_xQueuePeek
+        #define xQueueSemaphoreTake                    MPU_xQueueSemaphoreTake
+        #define uxQueueMessagesWaiting                 MPU_uxQueueMessagesWaiting
+        #define uxQueueSpacesAvailable                 MPU_uxQueueSpacesAvailable
+        #define vQueueDelete                           MPU_vQueueDelete
+        #define xQueueCreateMutex                      MPU_xQueueCreateMutex
+        #define xQueueCreateMutexStatic                MPU_xQueueCreateMutexStatic
+        #define xQueueCreateCountingSemaphore          MPU_xQueueCreateCountingSemaphore
+        #define xQueueCreateCountingSemaphoreStatic    MPU_xQueueCreateCountingSemaphoreStatic
+        #define xQueueGetMutexHolder                   MPU_xQueueGetMutexHolder
+        #define xQueueTakeMutexRecursive               MPU_xQueueTakeMutexRecursive
+        #define xQueueGiveMutexRecursive               MPU_xQueueGiveMutexRecursive
+        #define xQueueGenericCreate                    MPU_xQueueGenericCreate
+        #define xQueueGenericCreateStatic              MPU_xQueueGenericCreateStatic
+        #define xQueueCreateSet                        MPU_xQueueCreateSet
+        #define xQueueAddToSet                         MPU_xQueueAddToSet
+        #define xQueueRemoveFromSet                    MPU_xQueueRemoveFromSet
+        #define xQueueSelectFromSet                    MPU_xQueueSelectFromSet
+        #define xQueueGenericReset                     MPU_xQueueGenericReset
+
+        #if ( configQUEUE_REGISTRY_SIZE > 0 )
+            #define vQueueAddToRegistry                MPU_vQueueAddToRegistry
+            #define vQueueUnregisterQueue              MPU_vQueueUnregisterQueue
+            #define pcQueueGetName                     MPU_pcQueueGetName
+        #endif
+
+/* Map standard timer.h API functions to the MPU equivalents. */
+        #define xTimerCreate                           MPU_xTimerCreate
+        #define xTimerCreateStatic                     MPU_xTimerCreateStatic
+        #define pvTimerGetTimerID                      MPU_pvTimerGetTimerID
+        #define vTimerSetTimerID                       MPU_vTimerSetTimerID
+        #define xTimerIsTimerActive                    MPU_xTimerIsTimerActive
+        #define xTimerGetTimerDaemonTaskHandle         MPU_xTimerGetTimerDaemonTaskHandle
+        #define xTimerPendFunctionCall                 MPU_xTimerPendFunctionCall
+        #define pcTimerGetName                         MPU_pcTimerGetName
+        #define vTimerSetReloadMode                    MPU_vTimerSetReloadMode
+        #define uxTimerGetReloadMode                   MPU_uxTimerGetReloadMode
+        #define xTimerGetPeriod                        MPU_xTimerGetPeriod
+        #define xTimerGetExpiryTime                    MPU_xTimerGetExpiryTime
+        #define xTimerGenericCommand                   MPU_xTimerGenericCommand
+
+/* Map standard event_group.h API functions to the MPU equivalents. */
+        #define xEventGroupCreate                      MPU_xEventGroupCreate
+        #define xEventGroupCreateStatic                MPU_xEventGroupCreateStatic
+        #define xEventGroupWaitBits                    MPU_xEventGroupWaitBits
+        #define xEventGroupClearBits                   MPU_xEventGroupClearBits
+        #define xEventGroupSetBits                     MPU_xEventGroupSetBits
+        #define xEventGroupSync                        MPU_xEventGroupSync
+        #define vEventGroupDelete                      MPU_vEventGroupDelete
+
+/* Map standard message/stream_buffer.h API functions to the MPU
+ * equivalents. */
+        #define xStreamBufferSend                      MPU_xStreamBufferSend
+        #define xStreamBufferReceive                   MPU_xStreamBufferReceive
+        #define xStreamBufferNextMessageLengthBytes    MPU_xStreamBufferNextMessageLengthBytes
+        #define vStreamBufferDelete                    MPU_vStreamBufferDelete
+        #define xStreamBufferIsFull                    MPU_xStreamBufferIsFull
+        #define xStreamBufferIsEmpty                   MPU_xStreamBufferIsEmpty
+        #define xStreamBufferReset                     MPU_xStreamBufferReset
+        #define xStreamBufferSpacesAvailable           MPU_xStreamBufferSpacesAvailable
+        #define xStreamBufferBytesAvailable            MPU_xStreamBufferBytesAvailable
+        #define xStreamBufferSetTriggerLevel           MPU_xStreamBufferSetTriggerLevel
+        #define xStreamBufferGenericCreate             MPU_xStreamBufferGenericCreate
+        #define xStreamBufferGenericCreateStatic       MPU_xStreamBufferGenericCreateStatic
+
+
+/* Remove the privileged function macro, but keep the PRIVILEGED_DATA
+ * macro so applications can place data in privileged access sections
+ * (useful when using statically allocated objects). */
+        #define PRIVILEGED_FUNCTION
+        #define PRIVILEGED_DATA    __attribute__( ( section( "privileged_data" ) ) )
+        #define FREERTOS_SYSTEM_CALL
+
+    #else /* MPU_WRAPPERS_INCLUDED_FROM_API_FILE */
+
+        /* Ensure API functions go in the privileged execution section. */
+        #define PRIVILEGED_FUNCTION     __attribute__( ( section( "privileged_functions" ) ) )
+        #define PRIVILEGED_DATA         __attribute__( ( section( "privileged_data" ) ) )
+        #define FREERTOS_SYSTEM_CALL    __attribute__( ( section( "freertos_system_calls" ) ) )
+
+        /**
+         * @brief Calls the port specific code to raise the privilege.
+         *
+         * Sets xRunningPrivileged to pdFALSE if privilege was raised, else sets
+         * it to pdTRUE.
+         */
+        #define xPortRaisePrivilege( xRunningPrivileged )                      \
+        {                                                                      \
+            /* Check whether the processor is already privileged. */           \
+            xRunningPrivileged = portIS_PRIVILEGED();                          \
+                                                                               \
+            /* If the processor is not already privileged, raise privilege. */ \
+            if( xRunningPrivileged == pdFALSE )                                \
+            {                                                                  \
+                portRAISE_PRIVILEGE();                                         \
+            }                                                                  \
+        }
+
+        /**
+         * @brief If xRunningPrivileged is not pdTRUE, calls the port specific
+         * code to reset the privilege, otherwise does nothing.
+         */
+        #define vPortResetPrivilege( xRunningPrivileged )   \
+        {                                                   \
+            if( xRunningPrivileged == pdFALSE )             \
+            {                                               \
+                portRESET_PRIVILEGE();                      \
+            }                                               \
+        }
+
+    #endif /* MPU_WRAPPERS_INCLUDED_FROM_API_FILE */
+
+#else /* portUSING_MPU_WRAPPERS */
+
+    #define PRIVILEGED_FUNCTION
+    #define PRIVILEGED_DATA
+    #define FREERTOS_SYSTEM_CALL
+
+#endif /* portUSING_MPU_WRAPPERS */
+
+
+#endif /* MPU_WRAPPERS_H */

prj/TCPClient/FreeRTOS/include/portable.h

@@ -0,0 +1,223 @@
+/*
+ * FreeRTOS Kernel V10.4.6
+ * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * https://www.FreeRTOS.org
+ * https://github.com/FreeRTOS
+ *
+ */
+
+/*-----------------------------------------------------------
+* Portable layer API.  Each function must be defined for each port.
+*----------------------------------------------------------*/
+
+#ifndef PORTABLE_H
+#define PORTABLE_H
+
+/* Each FreeRTOS port has a unique portmacro.h header file.  Originally a
+ * pre-processor definition was used to ensure the pre-processor found the correct
+ * portmacro.h file for the port being used.  That scheme was deprecated in favour
+ * of setting the compiler's include path such that it found the correct
+ * portmacro.h file - removing the need for the constant and allowing the
+ * portmacro.h file to be located anywhere in relation to the port being used.
+ * Purely for reasons of backward compatibility the old method is still valid, but
+ * to make it clear that new projects should not use it, support for the port
+ * specific constants has been moved into the deprecated_definitions.h header
+ * file. */
+#include "deprecated_definitions.h"
+
+/* If portENTER_CRITICAL is not defined then including deprecated_definitions.h
+ * did not result in a portmacro.h header file being included - and it should be
+ * included here.  In this case the path to the correct portmacro.h header file
+ * must be set in the compiler's include path. */
+#ifndef portENTER_CRITICAL
+    #include "portmacro.h"
+#endif
+
+#if portBYTE_ALIGNMENT == 32
+    #define portBYTE_ALIGNMENT_MASK    ( 0x001f )
+#elif portBYTE_ALIGNMENT == 16
+    #define portBYTE_ALIGNMENT_MASK    ( 0x000f )
+#elif portBYTE_ALIGNMENT == 8
+    #define portBYTE_ALIGNMENT_MASK    ( 0x0007 )
+#elif portBYTE_ALIGNMENT == 4
+    #define portBYTE_ALIGNMENT_MASK    ( 0x0003 )
+#elif portBYTE_ALIGNMENT == 2
+    #define portBYTE_ALIGNMENT_MASK    ( 0x0001 )
+#elif portBYTE_ALIGNMENT == 1
+    #define portBYTE_ALIGNMENT_MASK    ( 0x0000 )
+#else /* if portBYTE_ALIGNMENT == 32 */
+    #error "Invalid portBYTE_ALIGNMENT definition"
+#endif /* if portBYTE_ALIGNMENT == 32 */
+
+#ifndef portUSING_MPU_WRAPPERS
+    #define portUSING_MPU_WRAPPERS    0
+#endif
+
+#ifndef portNUM_CONFIGURABLE_REGIONS
+    #define portNUM_CONFIGURABLE_REGIONS    1
+#endif
+
+#ifndef portHAS_STACK_OVERFLOW_CHECKING
+    #define portHAS_STACK_OVERFLOW_CHECKING    0
+#endif
+
+#ifndef portARCH_NAME
+    #define portARCH_NAME    NULL
+#endif
+
+#ifndef configSTACK_ALLOCATION_FROM_SEPARATE_HEAP
+    /* Defaults to 0 for backward compatibility. */
+    #define configSTACK_ALLOCATION_FROM_SEPARATE_HEAP    0
+#endif
+
+/* *INDENT-OFF* */
+#ifdef __cplusplus
+    extern "C" {
+#endif
+/* *INDENT-ON* */
+
+#include "mpu_wrappers.h"
+
+/*
+ * Setup the stack of a new task so it is ready to be placed under the
+ * scheduler control.  The registers have to be placed on the stack in
+ * the order that the port expects to find them.
+ *
+ */
+#if ( portUSING_MPU_WRAPPERS == 1 )
+    #if ( portHAS_STACK_OVERFLOW_CHECKING == 1 )
+        StackType_t * pxPortInitialiseStack( StackType_t * pxTopOfStack,
+                                             StackType_t * pxEndOfStack,
+                                             TaskFunction_t pxCode,
+                                             void * pvParameters,
+                                             BaseType_t xRunPrivileged ) PRIVILEGED_FUNCTION;
+    #else
+        StackType_t * pxPortInitialiseStack( StackType_t * pxTopOfStack,
+                                             TaskFunction_t pxCode,
+                                             void * pvParameters,
+                                             BaseType_t xRunPrivileged ) PRIVILEGED_FUNCTION;
+    #endif
+#else /* if ( portUSING_MPU_WRAPPERS == 1 ) */
+    #if ( portHAS_STACK_OVERFLOW_CHECKING == 1 )
+        StackType_t * pxPortInitialiseStack( StackType_t * pxTopOfStack,
+                                             StackType_t * pxEndOfStack,
+                                             TaskFunction_t pxCode,
+                                             void * pvParameters ) PRIVILEGED_FUNCTION;
+    #else
+        StackType_t * pxPortInitialiseStack( StackType_t * pxTopOfStack,
+                                             TaskFunction_t pxCode,
+                                             void * pvParameters ) PRIVILEGED_FUNCTION;
+    #endif
+#endif /* if ( portUSING_MPU_WRAPPERS == 1 ) */
+
+/* Used by heap_5.c to define the start address and size of each memory region
+ * that together comprise the total FreeRTOS heap space. */
+typedef struct HeapRegion
+{
+    uint8_t * pucStartAddress;
+    size_t xSizeInBytes;
+} HeapRegion_t;
+
+/* Used to pass information about the heap out of vPortGetHeapStats(). */
+typedef struct xHeapStats
+{
+    size_t xAvailableHeapSpaceInBytes;      /* The total heap size currently available - this is the sum of all the free blocks, not the largest block that can be allocated. */
+    size_t xSizeOfLargestFreeBlockInBytes;  /* The maximum size, in bytes, of all the free blocks within the heap at the time vPortGetHeapStats() is called. */
+    size_t xSizeOfSmallestFreeBlockInBytes; /* The minimum size, in bytes, of all the free blocks within the heap at the time vPortGetHeapStats() is called. */
+    size_t xNumberOfFreeBlocks;             /* The number of free memory blocks within the heap at the time vPortGetHeapStats() is called. */
+    size_t xMinimumEverFreeBytesRemaining;  /* The minimum amount of total free memory (sum of all free blocks) there has been in the heap since the system booted. */
+    size_t xNumberOfSuccessfulAllocations;  /* The number of calls to pvPortMalloc() that have returned a valid memory block. */
+    size_t xNumberOfSuccessfulFrees;        /* The number of calls to vPortFree() that has successfully freed a block of memory. */
+} HeapStats_t;
+
+/*
+ * Used to define multiple heap regions for use by heap_5.c.  This function
+ * must be called before any calls to pvPortMalloc() - not creating a task,
+ * queue, semaphore, mutex, software timer, event group, etc. will result in
+ * pvPortMalloc being called.
+ *
+ * pxHeapRegions passes in an array of HeapRegion_t structures - each of which
+ * defines a region of memory that can be used as the heap.  The array is
+ * terminated by a HeapRegions_t structure that has a size of 0.  The region
+ * with the lowest start address must appear first in the array.
+ */
+void vPortDefineHeapRegions( const HeapRegion_t * const pxHeapRegions ) PRIVILEGED_FUNCTION;
+
+/*
+ * Returns a HeapStats_t structure filled with information about the current
+ * heap state.
+ */
+void vPortGetHeapStats( HeapStats_t * pxHeapStats );
+
+/*
+ * Map to the memory management routines required for the port.
+ */
+void * pvPortMalloc( size_t xSize ) PRIVILEGED_FUNCTION;
+void vPortFree( void * pv ) PRIVILEGED_FUNCTION;
+void vPortInitialiseBlocks( void ) PRIVILEGED_FUNCTION;
+size_t xPortGetFreeHeapSize( void ) PRIVILEGED_FUNCTION;
+size_t xPortGetMinimumEverFreeHeapSize( void ) PRIVILEGED_FUNCTION;
+
+#if ( configSTACK_ALLOCATION_FROM_SEPARATE_HEAP == 1 )
+    void * pvPortMallocStack( size_t xSize ) PRIVILEGED_FUNCTION;
+    void vPortFreeStack( void * pv ) PRIVILEGED_FUNCTION;
+#else
+    #define pvPortMallocStack    pvPortMalloc
+    #define vPortFreeStack       vPortFree
+#endif
+
+/*
+ * Setup the hardware ready for the scheduler to take control.  This generally
+ * sets up a tick interrupt and sets timers for the correct tick frequency.
+ */
+BaseType_t xPortStartScheduler( void ) PRIVILEGED_FUNCTION;
+
+/*
+ * Undo any hardware/ISR setup that was performed by xPortStartScheduler() so
+ * the hardware is left in its original condition after the scheduler stops
+ * executing.
+ */
+void vPortEndScheduler( void ) PRIVILEGED_FUNCTION;
+
+/*
+ * The structures and methods of manipulating the MPU are contained within the
+ * port layer.
+ *
+ * Fills the xMPUSettings structure with the memory region information
+ * contained in xRegions.
+ */
+#if ( portUSING_MPU_WRAPPERS == 1 )
+    struct xMEMORY_REGION;
+    void vPortStoreTaskMPUSettings( xMPU_SETTINGS * xMPUSettings,
+                                    const struct xMEMORY_REGION * const xRegions,
+                                    StackType_t * pxBottomOfStack,
+                                    uint32_t ulStackDepth ) PRIVILEGED_FUNCTION;
+#endif
+
+/* *INDENT-OFF* */
+#ifdef __cplusplus
+    }
+#endif
+/* *INDENT-ON* */
+
+#endif /* PORTABLE_H */

prj/TCPClient/FreeRTOS/include/projdefs.h

@@ -0,0 +1,122 @@
+/*
+ * FreeRTOS Kernel V10.4.6
+ * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * https://www.FreeRTOS.org
+ * https://github.com/FreeRTOS
+ *
+ */
+
+#ifndef PROJDEFS_H
+#define PROJDEFS_H
+
+/*
+ * Defines the prototype to which task functions must conform.  Defined in this
+ * file to ensure the type is known before portable.h is included.
+ */
+typedef void (* TaskFunction_t)( void * );
+
+/* Converts a time in milliseconds to a time in ticks.  This macro can be
+ * overridden by a macro of the same name defined in FreeRTOSConfig.h in case the
+ * definition here is not suitable for your application. */
+#ifndef pdMS_TO_TICKS
+    #define pdMS_TO_TICKS( xTimeInMs )    ( ( TickType_t ) ( ( ( TickType_t ) ( xTimeInMs ) * ( TickType_t ) configTICK_RATE_HZ ) / ( TickType_t ) 1000U ) )
+#endif
+
+#define pdFALSE                                  ( ( BaseType_t ) 0 )
+#define pdTRUE                                   ( ( BaseType_t ) 1 )
+
+#define pdPASS                                   ( pdTRUE )
+#define pdFAIL                                   ( pdFALSE )
+#define errQUEUE_EMPTY                           ( ( BaseType_t ) 0 )
+#define errQUEUE_FULL                            ( ( BaseType_t ) 0 )
+
+/* FreeRTOS error definitions. */
+#define errCOULD_NOT_ALLOCATE_REQUIRED_MEMORY    ( -1 )
+#define errQUEUE_BLOCKED                         ( -4 )
+#define errQUEUE_YIELD                           ( -5 )
+
+/* Macros used for basic data corruption checks. */
+#ifndef configUSE_LIST_DATA_INTEGRITY_CHECK_BYTES
+    #define configUSE_LIST_DATA_INTEGRITY_CHECK_BYTES    0
+#endif
+
+#if ( configUSE_16_BIT_TICKS == 1 )
+    #define pdINTEGRITY_CHECK_VALUE    0x5a5a
+#else
+    #define pdINTEGRITY_CHECK_VALUE    0x5a5a5a5aUL
+#endif
+
+/* The following errno values are used by FreeRTOS+ components, not FreeRTOS
+ * itself. */
+#define pdFREERTOS_ERRNO_NONE             0   /* No errors */
+#define pdFREERTOS_ERRNO_ENOENT           2   /* No such file or directory */
+#define pdFREERTOS_ERRNO_EINTR            4   /* Interrupted system call */
+#define pdFREERTOS_ERRNO_EIO              5   /* I/O error */
+#define pdFREERTOS_ERRNO_ENXIO            6   /* No such device or address */
+#define pdFREERTOS_ERRNO_EBADF            9   /* Bad file number */
+#define pdFREERTOS_ERRNO_EAGAIN           11  /* No more processes */
+#define pdFREERTOS_ERRNO_EWOULDBLOCK      11  /* Operation would block */
+#define pdFREERTOS_ERRNO_ENOMEM           12  /* Not enough memory */
+#define pdFREERTOS_ERRNO_EACCES           13  /* Permission denied */
+#define pdFREERTOS_ERRNO_EFAULT           14  /* Bad address */
+#define pdFREERTOS_ERRNO_EBUSY            16  /* Mount device busy */
+#define pdFREERTOS_ERRNO_EEXIST           17  /* File exists */
+#define pdFREERTOS_ERRNO_EXDEV            18  /* Cross-device link */
+#define pdFREERTOS_ERRNO_ENODEV           19  /* No such device */
+#define pdFREERTOS_ERRNO_ENOTDIR          20  /* Not a directory */
+#define pdFREERTOS_ERRNO_EISDIR           21  /* Is a directory */
+#define pdFREERTOS_ERRNO_EINVAL           22  /* Invalid argument */
+#define pdFREERTOS_ERRNO_ENOSPC           28  /* No space left on device */
+#define pdFREERTOS_ERRNO_ESPIPE           29  /* Illegal seek */
+#define pdFREERTOS_ERRNO_EROFS            30  /* Read only file system */
+#define pdFREERTOS_ERRNO_EUNATCH          42  /* Protocol driver not attached */
+#define pdFREERTOS_ERRNO_EBADE            50  /* Invalid exchange */
+#define pdFREERTOS_ERRNO_EFTYPE           79  /* Inappropriate file type or format */
+#define pdFREERTOS_ERRNO_ENMFILE          89  /* No more files */
+#define pdFREERTOS_ERRNO_ENOTEMPTY        90  /* Directory not empty */
+#define pdFREERTOS_ERRNO_ENAMETOOLONG     91  /* File or path name too long */
+#define pdFREERTOS_ERRNO_EOPNOTSUPP       95  /* Operation not supported on transport endpoint */
+#define pdFREERTOS_ERRNO_ENOBUFS          105 /* No buffer space available */
+#define pdFREERTOS_ERRNO_ENOPROTOOPT      109 /* Protocol not available */
+#define pdFREERTOS_ERRNO_EADDRINUSE       112 /* Address already in use */
+#define pdFREERTOS_ERRNO_ETIMEDOUT        116 /* Connection timed out */
+#define pdFREERTOS_ERRNO_EINPROGRESS      119 /* Connection already in progress */
+#define pdFREERTOS_ERRNO_EALREADY         120 /* Socket already connected */
+#define pdFREERTOS_ERRNO_EADDRNOTAVAIL    125 /* Address not available */
+#define pdFREERTOS_ERRNO_EISCONN          127 /* Socket is already connected */
+#define pdFREERTOS_ERRNO_ENOTCONN         128 /* Socket is not connected */
+#define pdFREERTOS_ERRNO_ENOMEDIUM        135 /* No medium inserted */
+#define pdFREERTOS_ERRNO_EILSEQ           138 /* An invalid UTF-16 sequence was encountered. */
+#define pdFREERTOS_ERRNO_ECANCELED        140 /* Operation canceled. */
+
+/* The following endian values are used by FreeRTOS+ components, not FreeRTOS
+ * itself. */
+#define pdFREERTOS_LITTLE_ENDIAN          0
+#define pdFREERTOS_BIG_ENDIAN             1
+
+/* Re-defining endian values for generic naming. */
+#define pdLITTLE_ENDIAN                   pdFREERTOS_LITTLE_ENDIAN
+#define pdBIG_ENDIAN                      pdFREERTOS_BIG_ENDIAN
+
+
+#endif /* PROJDEFS_H */

prj/TCPClient/FreeRTOS/include/stack_macros.h

@@ -0,0 +1,137 @@
+/*
+ * FreeRTOS Kernel V10.4.6
+ * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * https://www.FreeRTOS.org
+ * https://github.com/FreeRTOS
+ *
+ */
+
+#ifndef STACK_MACROS_H
+#define STACK_MACROS_H
+
+/*
+ * Call the stack overflow hook function if the stack of the task being swapped
+ * out is currently overflowed, or looks like it might have overflowed in the
+ * past.
+ *
+ * Setting configCHECK_FOR_STACK_OVERFLOW to 1 will cause the macro to check
+ * the current stack state only - comparing the current top of stack value to
+ * the stack limit.  Setting configCHECK_FOR_STACK_OVERFLOW to greater than 1
+ * will also cause the last few stack bytes to be checked to ensure the value
+ * to which the bytes were set when the task was created have not been
+ * overwritten.  Note this second test does not guarantee that an overflowed
+ * stack will always be recognised.
+ */
+
+/*-----------------------------------------------------------*/
+
+/*
+ * portSTACK_LIMIT_PADDING is a number of extra words to consider to be in
+ * use on the stack.
+ */
+#ifndef portSTACK_LIMIT_PADDING
+    #define portSTACK_LIMIT_PADDING    0
+#endif
+
+#if ( ( configCHECK_FOR_STACK_OVERFLOW == 1 ) && ( portSTACK_GROWTH < 0 ) )
+
+/* Only the current stack state is to be checked. */
+    #define taskCHECK_FOR_STACK_OVERFLOW()                                                            \
+    {                                                                                                 \
+        /* Is the currently saved stack pointer within the stack limit? */                            \
+        if( pxCurrentTCB->pxTopOfStack <= pxCurrentTCB->pxStack + portSTACK_LIMIT_PADDING )           \
+        {                                                                                             \
+            vApplicationStackOverflowHook( ( TaskHandle_t ) pxCurrentTCB, pxCurrentTCB->pcTaskName ); \
+        }                                                                                             \
+    }
+
+#endif /* configCHECK_FOR_STACK_OVERFLOW == 1 */
+/*-----------------------------------------------------------*/
+
+#if ( ( configCHECK_FOR_STACK_OVERFLOW == 1 ) && ( portSTACK_GROWTH > 0 ) )
+
+/* Only the current stack state is to be checked. */
+    #define taskCHECK_FOR_STACK_OVERFLOW()                                                            \
+    {                                                                                                 \
+                                                                                                      \
+        /* Is the currently saved stack pointer within the stack limit? */                            \
+        if( pxCurrentTCB->pxTopOfStack >= pxCurrentTCB->pxEndOfStack - portSTACK_LIMIT_PADDING )      \
+        {                                                                                             \
+            vApplicationStackOverflowHook( ( TaskHandle_t ) pxCurrentTCB, pxCurrentTCB->pcTaskName ); \
+        }                                                                                             \
+    }
+
+#endif /* configCHECK_FOR_STACK_OVERFLOW == 1 */
+/*-----------------------------------------------------------*/
+
+#if ( ( configCHECK_FOR_STACK_OVERFLOW > 1 ) && ( portSTACK_GROWTH < 0 ) )
+
+    #define taskCHECK_FOR_STACK_OVERFLOW()                                                            \
+    {                                                                                                 \
+        const uint32_t * const pulStack = ( uint32_t * ) pxCurrentTCB->pxStack;                       \
+        const uint32_t ulCheckValue = ( uint32_t ) 0xa5a5a5a5;                                        \
+                                                                                                      \
+        if( ( pulStack[ 0 ] != ulCheckValue ) ||                                                      \
+            ( pulStack[ 1 ] != ulCheckValue ) ||                                                      \
+            ( pulStack[ 2 ] != ulCheckValue ) ||                                                      \
+            ( pulStack[ 3 ] != ulCheckValue ) )                                                       \
+        {                                                                                             \
+            vApplicationStackOverflowHook( ( TaskHandle_t ) pxCurrentTCB, pxCurrentTCB->pcTaskName ); \
+        }                                                                                             \
+    }
+
+#endif /* #if( configCHECK_FOR_STACK_OVERFLOW > 1 ) */
+/*-----------------------------------------------------------*/
+
+#if ( ( configCHECK_FOR_STACK_OVERFLOW > 1 ) && ( portSTACK_GROWTH > 0 ) )
+
+    #define taskCHECK_FOR_STACK_OVERFLOW()                                                                                                \
+    {                                                                                                                                     \
+        int8_t * pcEndOfStack = ( int8_t * ) pxCurrentTCB->pxEndOfStack;                                                                  \
+        static const uint8_t ucExpectedStackBytes[] = { tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE,   \
+                                                        tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE,   \
+                                                        tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE,   \
+                                                        tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE,   \
+                                                        tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE, tskSTACK_FILL_BYTE }; \
+                                                                                                                                          \
+                                                                                                                                          \
+        pcEndOfStack -= sizeof( ucExpectedStackBytes );                                                                                   \
+                                                                                                                                          \
+        /* Has the extremity of the task stack ever been written over? */                                                                 \
+        if( memcmp( ( void * ) pcEndOfStack, ( void * ) ucExpectedStackBytes, sizeof( ucExpectedStackBytes ) ) != 0 )                     \
+        {                                                                                                                                 \
+            vApplicationStackOverflowHook( ( TaskHandle_t ) pxCurrentTCB, pxCurrentTCB->pcTaskName );                                     \
+        }                                                                                                                                 \
+    }
+
+#endif /* #if( configCHECK_FOR_STACK_OVERFLOW > 1 ) */
+/*-----------------------------------------------------------*/
+
+/* Remove stack overflow macro if not being used. */
+#ifndef taskCHECK_FOR_STACK_OVERFLOW
+    #define taskCHECK_FOR_STACK_OVERFLOW()
+#endif
+
+
+
+#endif /* STACK_MACROS_H */

prj/TCPClient/FreeRTOS/include/stdint.readme

@@ -0,0 +1,58 @@
+/*
+ * FreeRTOS Kernel V10.4.6
+ * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * https://www.FreeRTOS.org
+ * https://github.com/FreeRTOS
+ *
+ */
+
+#ifndef FREERTOS_STDINT
+#define FREERTOS_STDINT
+
+/*******************************************************************************
+ * THIS IS NOT A FULL stdint.h IMPLEMENTATION - It only contains the definitions
+ * necessary to build the FreeRTOS code.  It is provided to allow FreeRTOS to be
+ * built using compilers that do not provide their own stdint.h definition.
+ *
+ * To use this file:
+ *
+ *    1) Copy this file into the directory that contains your FreeRTOSConfig.h
+ *       header file, as that directory will already be in the compiler's include
+ *       path.
+ *
+ *    2) Rename the copied file stdint.h.
+ *
+ */
+
+typedef signed char int8_t;
+typedef unsigned char uint8_t;
+typedef short int16_t;
+typedef unsigned short uint16_t;
+typedef long int32_t;
+typedef unsigned long uint32_t;
+
+#ifndef SIZE_MAX
+    #define SIZE_MAX    ( ( size_t ) -1 )
+#endif
+
+#endif /* FREERTOS_STDINT */

prj/TCPClient/FreeRTOS/include/stream_buffer.h

@@ -0,0 +1,869 @@
+/*
+ * FreeRTOS Kernel V10.4.6
+ * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * https://www.FreeRTOS.org
+ * https://github.com/FreeRTOS
+ *
+ */
+
+/*
+ * Stream buffers are used to send a continuous stream of data from one task or
+ * interrupt to another.  Their implementation is light weight, making them
+ * particularly suited for interrupt to task and core to core communication
+ * scenarios.
+ *
+ * ***NOTE***:  Uniquely among FreeRTOS objects, the stream buffer
+ * implementation (so also the message buffer implementation, as message buffers
+ * are built on top of stream buffers) assumes there is only one task or
+ * interrupt that will write to the buffer (the writer), and only one task or
+ * interrupt that will read from the buffer (the reader).  It is safe for the
+ * writer and reader to be different tasks or interrupts, but, unlike other
+ * FreeRTOS objects, it is not safe to have multiple different writers or
+ * multiple different readers.  If there are to be multiple different writers
+ * then the application writer must place each call to a writing API function
+ * (such as xStreamBufferSend()) inside a critical section and set the send
+ * block time to 0.  Likewise, if there are to be multiple different readers
+ * then the application writer must place each call to a reading API function
+ * (such as xStreamBufferReceive()) inside a critical section section and set the
+ * receive block time to 0.
+ *
+ */
+
+#ifndef STREAM_BUFFER_H
+#define STREAM_BUFFER_H
+
+#ifndef INC_FREERTOS_H
+    #error "include FreeRTOS.h must appear in source files before include stream_buffer.h"
+#endif
+
+/* *INDENT-OFF* */
+#if defined( __cplusplus )
+    extern "C" {
+#endif
+/* *INDENT-ON* */
+
+/**
+ * Type by which stream buffers are referenced.  For example, a call to
+ * xStreamBufferCreate() returns an StreamBufferHandle_t variable that can
+ * then be used as a parameter to xStreamBufferSend(), xStreamBufferReceive(),
+ * etc.
+ */
+struct StreamBufferDef_t;
+typedef struct StreamBufferDef_t * StreamBufferHandle_t;
+
+
+/**
+ * stream_buffer.h
+ *
+ * @code{c}
+ * StreamBufferHandle_t xStreamBufferCreate( size_t xBufferSizeBytes, size_t xTriggerLevelBytes );
+ * @endcode
+ *
+ * Creates a new stream buffer using dynamically allocated memory.  See
+ * xStreamBufferCreateStatic() for a version that uses statically allocated
+ * memory (memory that is allocated at compile time).
+ *
+ * configSUPPORT_DYNAMIC_ALLOCATION must be set to 1 or left undefined in
+ * FreeRTOSConfig.h for xStreamBufferCreate() to be available.
+ *
+ * @param xBufferSizeBytes The total number of bytes the stream buffer will be
+ * able to hold at any one time.
+ *
+ * @param xTriggerLevelBytes The number of bytes that must be in the stream
+ * buffer before a task that is blocked on the stream buffer to wait for data is
+ * moved out of the blocked state.  For example, if a task is blocked on a read
+ * of an empty stream buffer that has a trigger level of 1 then the task will be
+ * unblocked when a single byte is written to the buffer or the task's block
+ * time expires.  As another example, if a task is blocked on a read of an empty
+ * stream buffer that has a trigger level of 10 then the task will not be
+ * unblocked until the stream buffer contains at least 10 bytes or the task's
+ * block time expires.  If a reading task's block time expires before the
+ * trigger level is reached then the task will still receive however many bytes
+ * are actually available.  Setting a trigger level of 0 will result in a
+ * trigger level of 1 being used.  It is not valid to specify a trigger level
+ * that is greater than the buffer size.
+ *
+ * @return If NULL is returned, then the stream buffer cannot be created
+ * because there is insufficient heap memory available for FreeRTOS to allocate
+ * the stream buffer data structures and storage area.  A non-NULL value being
+ * returned indicates that the stream buffer has been created successfully -
+ * the returned value should be stored as the handle to the created stream
+ * buffer.
+ *
+ * Example use:
+ * @code{c}
+ *
+ * void vAFunction( void )
+ * {
+ * StreamBufferHandle_t xStreamBuffer;
+ * const size_t xStreamBufferSizeBytes = 100, xTriggerLevel = 10;
+ *
+ *  // Create a stream buffer that can hold 100 bytes.  The memory used to hold
+ *  // both the stream buffer structure and the data in the stream buffer is
+ *  // allocated dynamically.
+ *  xStreamBuffer = xStreamBufferCreate( xStreamBufferSizeBytes, xTriggerLevel );
+ *
+ *  if( xStreamBuffer == NULL )
+ *  {
+ *      // There was not enough heap memory space available to create the
+ *      // stream buffer.
+ *  }
+ *  else
+ *  {
+ *      // The stream buffer was created successfully and can now be used.
+ *  }
+ * }
+ * @endcode
+ * \defgroup xStreamBufferCreate xStreamBufferCreate
+ * \ingroup StreamBufferManagement
+ */
+#define xStreamBufferCreate( xBufferSizeBytes, xTriggerLevelBytes )    xStreamBufferGenericCreate( xBufferSizeBytes, xTriggerLevelBytes, pdFALSE )
+
+/**
+ * stream_buffer.h
+ *
+ * @code{c}
+ * StreamBufferHandle_t xStreamBufferCreateStatic( size_t xBufferSizeBytes,
+ *                                              size_t xTriggerLevelBytes,
+ *                                              uint8_t *pucStreamBufferStorageArea,
+ *                                              StaticStreamBuffer_t *pxStaticStreamBuffer );
+ * @endcode
+ * Creates a new stream buffer using statically allocated memory.  See
+ * xStreamBufferCreate() for a version that uses dynamically allocated memory.
+ *
+ * configSUPPORT_STATIC_ALLOCATION must be set to 1 in FreeRTOSConfig.h for
+ * xStreamBufferCreateStatic() to be available.
+ *
+ * @param xBufferSizeBytes The size, in bytes, of the buffer pointed to by the
+ * pucStreamBufferStorageArea parameter.
+ *
+ * @param xTriggerLevelBytes The number of bytes that must be in the stream
+ * buffer before a task that is blocked on the stream buffer to wait for data is
+ * moved out of the blocked state.  For example, if a task is blocked on a read
+ * of an empty stream buffer that has a trigger level of 1 then the task will be
+ * unblocked when a single byte is written to the buffer or the task's block
+ * time expires.  As another example, if a task is blocked on a read of an empty
+ * stream buffer that has a trigger level of 10 then the task will not be
+ * unblocked until the stream buffer contains at least 10 bytes or the task's
+ * block time expires.  If a reading task's block time expires before the
+ * trigger level is reached then the task will still receive however many bytes
+ * are actually available.  Setting a trigger level of 0 will result in a
+ * trigger level of 1 being used.  It is not valid to specify a trigger level
+ * that is greater than the buffer size.
+ *
+ * @param pucStreamBufferStorageArea Must point to a uint8_t array that is at
+ * least xBufferSizeBytes big.  This is the array to which streams are
+ * copied when they are written to the stream buffer.
+ *
+ * @param pxStaticStreamBuffer Must point to a variable of type
+ * StaticStreamBuffer_t, which will be used to hold the stream buffer's data
+ * structure.
+ *
+ * @return If the stream buffer is created successfully then a handle to the
+ * created stream buffer is returned. If either pucStreamBufferStorageArea or
+ * pxStaticstreamBuffer are NULL then NULL is returned.
+ *
+ * Example use:
+ * @code{c}
+ *
+ * // Used to dimension the array used to hold the streams.  The available space
+ * // will actually be one less than this, so 999.
+ #define STORAGE_SIZE_BYTES 1000
+ *
+ * // Defines the memory that will actually hold the streams within the stream
+ * // buffer.
+ * static uint8_t ucStorageBuffer[ STORAGE_SIZE_BYTES ];
+ *
+ * // The variable used to hold the stream buffer structure.
+ * StaticStreamBuffer_t xStreamBufferStruct;
+ *
+ * void MyFunction( void )
+ * {
+ * StreamBufferHandle_t xStreamBuffer;
+ * const size_t xTriggerLevel = 1;
+ *
+ *  xStreamBuffer = xStreamBufferCreateStatic( sizeof( ucStorageBuffer ),
+ *                                             xTriggerLevel,
+ *                                             ucStorageBuffer,
+ *                                             &xStreamBufferStruct );
+ *
+ *  // As neither the pucStreamBufferStorageArea or pxStaticStreamBuffer
+ *  // parameters were NULL, xStreamBuffer will not be NULL, and can be used to
+ *  // reference the created stream buffer in other stream buffer API calls.
+ *
+ *  // Other code that uses the stream buffer can go here.
+ * }
+ *
+ * @endcode
+ * \defgroup xStreamBufferCreateStatic xStreamBufferCreateStatic
+ * \ingroup StreamBufferManagement
+ */
+#define xStreamBufferCreateStatic( xBufferSizeBytes, xTriggerLevelBytes, pucStreamBufferStorageArea, pxStaticStreamBuffer ) \
+    xStreamBufferGenericCreateStatic( xBufferSizeBytes, xTriggerLevelBytes, pdFALSE, pucStreamBufferStorageArea, pxStaticStreamBuffer )
+
+/**
+ * stream_buffer.h
+ *
+ * @code{c}
+ * size_t xStreamBufferSend( StreamBufferHandle_t xStreamBuffer,
+ *                        const void *pvTxData,
+ *                        size_t xDataLengthBytes,
+ *                        TickType_t xTicksToWait );
+ * @endcode
+ *
+ * Sends bytes to a stream buffer.  The bytes are copied into the stream buffer.
+ *
+ * ***NOTE***:  Uniquely among FreeRTOS objects, the stream buffer
+ * implementation (so also the message buffer implementation, as message buffers
+ * are built on top of stream buffers) assumes there is only one task or
+ * interrupt that will write to the buffer (the writer), and only one task or
+ * interrupt that will read from the buffer (the reader).  It is safe for the
+ * writer and reader to be different tasks or interrupts, but, unlike other
+ * FreeRTOS objects, it is not safe to have multiple different writers or
+ * multiple different readers.  If there are to be multiple different writers
+ * then the application writer must place each call to a writing API function
+ * (such as xStreamBufferSend()) inside a critical section and set the send
+ * block time to 0.  Likewise, if there are to be multiple different readers
+ * then the application writer must place each call to a reading API function
+ * (such as xStreamBufferReceive()) inside a critical section and set the receive
+ * block time to 0.
+ *
+ * Use xStreamBufferSend() to write to a stream buffer from a task.  Use
+ * xStreamBufferSendFromISR() to write to a stream buffer from an interrupt
+ * service routine (ISR).
+ *
+ * @param xStreamBuffer The handle of the stream buffer to which a stream is
+ * being sent.
+ *
+ * @param pvTxData A pointer to the buffer that holds the bytes to be copied
+ * into the stream buffer.
+ *
+ * @param xDataLengthBytes   The maximum number of bytes to copy from pvTxData
+ * into the stream buffer.
+ *
+ * @param xTicksToWait The maximum amount of time the task should remain in the
+ * Blocked state to wait for enough space to become available in the stream
+ * buffer, should the stream buffer contain too little space to hold the
+ * another xDataLengthBytes bytes.  The block time is specified in tick periods,
+ * so the absolute time it represents is dependent on the tick frequency.  The
+ * macro pdMS_TO_TICKS() can be used to convert a time specified in milliseconds
+ * into a time specified in ticks.  Setting xTicksToWait to portMAX_DELAY will
+ * cause the task to wait indefinitely (without timing out), provided
+ * INCLUDE_vTaskSuspend is set to 1 in FreeRTOSConfig.h.  If a task times out
+ * before it can write all xDataLengthBytes into the buffer it will still write
+ * as many bytes as possible.  A task does not use any CPU time when it is in
+ * the blocked state.
+ *
+ * @return The number of bytes written to the stream buffer.  If a task times
+ * out before it can write all xDataLengthBytes into the buffer it will still
+ * write as many bytes as possible.
+ *
+ * Example use:
+ * @code{c}
+ * void vAFunction( StreamBufferHandle_t xStreamBuffer )
+ * {
+ * size_t xBytesSent;
+ * uint8_t ucArrayToSend[] = { 0, 1, 2, 3 };
+ * char *pcStringToSend = "String to send";
+ * const TickType_t x100ms = pdMS_TO_TICKS( 100 );
+ *
+ *  // Send an array to the stream buffer, blocking for a maximum of 100ms to
+ *  // wait for enough space to be available in the stream buffer.
+ *  xBytesSent = xStreamBufferSend( xStreamBuffer, ( void * ) ucArrayToSend, sizeof( ucArrayToSend ), x100ms );
+ *
+ *  if( xBytesSent != sizeof( ucArrayToSend ) )
+ *  {
+ *      // The call to xStreamBufferSend() times out before there was enough
+ *      // space in the buffer for the data to be written, but it did
+ *      // successfully write xBytesSent bytes.
+ *  }
+ *
+ *  // Send the string to the stream buffer.  Return immediately if there is not
+ *  // enough space in the buffer.
+ *  xBytesSent = xStreamBufferSend( xStreamBuffer, ( void * ) pcStringToSend, strlen( pcStringToSend ), 0 );
+ *
+ *  if( xBytesSent != strlen( pcStringToSend ) )
+ *  {
+ *      // The entire string could not be added to the stream buffer because
+ *      // there was not enough free space in the buffer, but xBytesSent bytes
+ *      // were sent.  Could try again to send the remaining bytes.
+ *  }
+ * }
+ * @endcode
+ * \defgroup xStreamBufferSend xStreamBufferSend
+ * \ingroup StreamBufferManagement
+ */
+size_t xStreamBufferSend( StreamBufferHandle_t xStreamBuffer,
+                          const void * pvTxData,
+                          size_t xDataLengthBytes,
+                          TickType_t xTicksToWait ) PRIVILEGED_FUNCTION;
+
+/**
+ * stream_buffer.h
+ *
+ * @code{c}
+ * size_t xStreamBufferSendFromISR( StreamBufferHandle_t xStreamBuffer,
+ *                               const void *pvTxData,
+ *                               size_t xDataLengthBytes,
+ *                               BaseType_t *pxHigherPriorityTaskWoken );
+ * @endcode
+ *
+ * Interrupt safe version of the API function that sends a stream of bytes to
+ * the stream buffer.
+ *
+ * ***NOTE***:  Uniquely among FreeRTOS objects, the stream buffer
+ * implementation (so also the message buffer implementation, as message buffers
+ * are built on top of stream buffers) assumes there is only one task or
+ * interrupt that will write to the buffer (the writer), and only one task or
+ * interrupt that will read from the buffer (the reader).  It is safe for the
+ * writer and reader to be different tasks or interrupts, but, unlike other
+ * FreeRTOS objects, it is not safe to have multiple different writers or
+ * multiple different readers.  If there are to be multiple different writers
+ * then the application writer must place each call to a writing API function
+ * (such as xStreamBufferSend()) inside a critical section and set the send
+ * block time to 0.  Likewise, if there are to be multiple different readers
+ * then the application writer must place each call to a reading API function
+ * (such as xStreamBufferReceive()) inside a critical section and set the receive
+ * block time to 0.
+ *
+ * Use xStreamBufferSend() to write to a stream buffer from a task.  Use
+ * xStreamBufferSendFromISR() to write to a stream buffer from an interrupt
+ * service routine (ISR).
+ *
+ * @param xStreamBuffer The handle of the stream buffer to which a stream is
+ * being sent.
+ *
+ * @param pvTxData A pointer to the data that is to be copied into the stream
+ * buffer.
+ *
+ * @param xDataLengthBytes The maximum number of bytes to copy from pvTxData
+ * into the stream buffer.
+ *
+ * @param pxHigherPriorityTaskWoken  It is possible that a stream buffer will
+ * have a task blocked on it waiting for data.  Calling
+ * xStreamBufferSendFromISR() can make data available, and so cause a task that
+ * was waiting for data to leave the Blocked state.  If calling
+ * xStreamBufferSendFromISR() causes a task to leave the Blocked state, and the
+ * unblocked task has a priority higher than the currently executing task (the
+ * task that was interrupted), then, internally, xStreamBufferSendFromISR()
+ * will set *pxHigherPriorityTaskWoken to pdTRUE.  If
+ * xStreamBufferSendFromISR() sets this value to pdTRUE, then normally a
+ * context switch should be performed before the interrupt is exited.  This will
+ * ensure that the interrupt returns directly to the highest priority Ready
+ * state task.  *pxHigherPriorityTaskWoken should be set to pdFALSE before it
+ * is passed into the function.  See the example code below for an example.
+ *
+ * @return The number of bytes actually written to the stream buffer, which will
+ * be less than xDataLengthBytes if the stream buffer didn't have enough free
+ * space for all the bytes to be written.
+ *
+ * Example use:
+ * @code{c}
+ * // A stream buffer that has already been created.
+ * StreamBufferHandle_t xStreamBuffer;
+ *
+ * void vAnInterruptServiceRoutine( void )
+ * {
+ * size_t xBytesSent;
+ * char *pcStringToSend = "String to send";
+ * BaseType_t xHigherPriorityTaskWoken = pdFALSE; // Initialised to pdFALSE.
+ *
+ *  // Attempt to send the string to the stream buffer.
+ *  xBytesSent = xStreamBufferSendFromISR( xStreamBuffer,
+ *                                         ( void * ) pcStringToSend,
+ *                                         strlen( pcStringToSend ),
+ *                                         &xHigherPriorityTaskWoken );
+ *
+ *  if( xBytesSent != strlen( pcStringToSend ) )
+ *  {
+ *      // There was not enough free space in the stream buffer for the entire
+ *      // string to be written, ut xBytesSent bytes were written.
+ *  }
+ *
+ *  // If xHigherPriorityTaskWoken was set to pdTRUE inside
+ *  // xStreamBufferSendFromISR() then a task that has a priority above the
+ *  // priority of the currently executing task was unblocked and a context
+ *  // switch should be performed to ensure the ISR returns to the unblocked
+ *  // task.  In most FreeRTOS ports this is done by simply passing
+ *  // xHigherPriorityTaskWoken into taskYIELD_FROM_ISR(), which will test the
+ *  // variables value, and perform the context switch if necessary.  Check the
+ *  // documentation for the port in use for port specific instructions.
+ *  taskYIELD_FROM_ISR( xHigherPriorityTaskWoken );
+ * }
+ * @endcode
+ * \defgroup xStreamBufferSendFromISR xStreamBufferSendFromISR
+ * \ingroup StreamBufferManagement
+ */
+size_t xStreamBufferSendFromISR( StreamBufferHandle_t xStreamBuffer,
+                                 const void * pvTxData,
+                                 size_t xDataLengthBytes,
+                                 BaseType_t * const pxHigherPriorityTaskWoken ) PRIVILEGED_FUNCTION;
+
+/**
+ * stream_buffer.h
+ *
+ * @code{c}
+ * size_t xStreamBufferReceive( StreamBufferHandle_t xStreamBuffer,
+ *                           void *pvRxData,
+ *                           size_t xBufferLengthBytes,
+ *                           TickType_t xTicksToWait );
+ * @endcode
+ *
+ * Receives bytes from a stream buffer.
+ *
+ * ***NOTE***:  Uniquely among FreeRTOS objects, the stream buffer
+ * implementation (so also the message buffer implementation, as message buffers
+ * are built on top of stream buffers) assumes there is only one task or
+ * interrupt that will write to the buffer (the writer), and only one task or
+ * interrupt that will read from the buffer (the reader).  It is safe for the
+ * writer and reader to be different tasks or interrupts, but, unlike other
+ * FreeRTOS objects, it is not safe to have multiple different writers or
+ * multiple different readers.  If there are to be multiple different writers
+ * then the application writer must place each call to a writing API function
+ * (such as xStreamBufferSend()) inside a critical section and set the send
+ * block time to 0.  Likewise, if there are to be multiple different readers
+ * then the application writer must place each call to a reading API function
+ * (such as xStreamBufferReceive()) inside a critical section and set the receive
+ * block time to 0.
+ *
+ * Use xStreamBufferReceive() to read from a stream buffer from a task.  Use
+ * xStreamBufferReceiveFromISR() to read from a stream buffer from an
+ * interrupt service routine (ISR).
+ *
+ * @param xStreamBuffer The handle of the stream buffer from which bytes are to
+ * be received.
+ *
+ * @param pvRxData A pointer to the buffer into which the received bytes will be
+ * copied.
+ *
+ * @param xBufferLengthBytes The length of the buffer pointed to by the
+ * pvRxData parameter.  This sets the maximum number of bytes to receive in one
+ * call.  xStreamBufferReceive will return as many bytes as possible up to a
+ * maximum set by xBufferLengthBytes.
+ *
+ * @param xTicksToWait The maximum amount of time the task should remain in the
+ * Blocked state to wait for data to become available if the stream buffer is
+ * empty.  xStreamBufferReceive() will return immediately if xTicksToWait is
+ * zero.  The block time is specified in tick periods, so the absolute time it
+ * represents is dependent on the tick frequency.  The macro pdMS_TO_TICKS() can
+ * be used to convert a time specified in milliseconds into a time specified in
+ * ticks.  Setting xTicksToWait to portMAX_DELAY will cause the task to wait
+ * indefinitely (without timing out), provided INCLUDE_vTaskSuspend is set to 1
+ * in FreeRTOSConfig.h.  A task does not use any CPU time when it is in the
+ * Blocked state.
+ *
+ * @return The number of bytes actually read from the stream buffer, which will
+ * be less than xBufferLengthBytes if the call to xStreamBufferReceive() timed
+ * out before xBufferLengthBytes were available.
+ *
+ * Example use:
+ * @code{c}
+ * void vAFunction( StreamBuffer_t xStreamBuffer )
+ * {
+ * uint8_t ucRxData[ 20 ];
+ * size_t xReceivedBytes;
+ * const TickType_t xBlockTime = pdMS_TO_TICKS( 20 );
+ *
+ *  // Receive up to another sizeof( ucRxData ) bytes from the stream buffer.
+ *  // Wait in the Blocked state (so not using any CPU processing time) for a
+ *  // maximum of 100ms for the full sizeof( ucRxData ) number of bytes to be
+ *  // available.
+ *  xReceivedBytes = xStreamBufferReceive( xStreamBuffer,
+ *                                         ( void * ) ucRxData,
+ *                                         sizeof( ucRxData ),
+ *                                         xBlockTime );
+ *
+ *  if( xReceivedBytes > 0 )
+ *  {
+ *      // A ucRxData contains another xRecievedBytes bytes of data, which can
+ *      // be processed here....
+ *  }
+ * }
+ * @endcode
+ * \defgroup xStreamBufferReceive xStreamBufferReceive
+ * \ingroup StreamBufferManagement
+ */
+size_t xStreamBufferReceive( StreamBufferHandle_t xStreamBuffer,
+                             void * pvRxData,
+                             size_t xBufferLengthBytes,
+                             TickType_t xTicksToWait ) PRIVILEGED_FUNCTION;
+
+/**
+ * stream_buffer.h
+ *
+ * @code{c}
+ * size_t xStreamBufferReceiveFromISR( StreamBufferHandle_t xStreamBuffer,
+ *                                  void *pvRxData,
+ *                                  size_t xBufferLengthBytes,
+ *                                  BaseType_t *pxHigherPriorityTaskWoken );
+ * @endcode
+ *
+ * An interrupt safe version of the API function that receives bytes from a
+ * stream buffer.
+ *
+ * Use xStreamBufferReceive() to read bytes from a stream buffer from a task.
+ * Use xStreamBufferReceiveFromISR() to read bytes from a stream buffer from an
+ * interrupt service routine (ISR).
+ *
+ * @param xStreamBuffer The handle of the stream buffer from which a stream
+ * is being received.
+ *
+ * @param pvRxData A pointer to the buffer into which the received bytes are
+ * copied.
+ *
+ * @param xBufferLengthBytes The length of the buffer pointed to by the
+ * pvRxData parameter.  This sets the maximum number of bytes to receive in one
+ * call.  xStreamBufferReceive will return as many bytes as possible up to a
+ * maximum set by xBufferLengthBytes.
+ *
+ * @param pxHigherPriorityTaskWoken  It is possible that a stream buffer will
+ * have a task blocked on it waiting for space to become available.  Calling
+ * xStreamBufferReceiveFromISR() can make space available, and so cause a task
+ * that is waiting for space to leave the Blocked state.  If calling
+ * xStreamBufferReceiveFromISR() causes a task to leave the Blocked state, and
+ * the unblocked task has a priority higher than the currently executing task
+ * (the task that was interrupted), then, internally,
+ * xStreamBufferReceiveFromISR() will set *pxHigherPriorityTaskWoken to pdTRUE.
+ * If xStreamBufferReceiveFromISR() sets this value to pdTRUE, then normally a
+ * context switch should be performed before the interrupt is exited.  That will
+ * ensure the interrupt returns directly to the highest priority Ready state
+ * task.  *pxHigherPriorityTaskWoken should be set to pdFALSE before it is
+ * passed into the function.  See the code example below for an example.
+ *
+ * @return The number of bytes read from the stream buffer, if any.
+ *
+ * Example use:
+ * @code{c}
+ * // A stream buffer that has already been created.
+ * StreamBuffer_t xStreamBuffer;
+ *
+ * void vAnInterruptServiceRoutine( void )
+ * {
+ * uint8_t ucRxData[ 20 ];
+ * size_t xReceivedBytes;
+ * BaseType_t xHigherPriorityTaskWoken = pdFALSE;  // Initialised to pdFALSE.
+ *
+ *  // Receive the next stream from the stream buffer.
+ *  xReceivedBytes = xStreamBufferReceiveFromISR( xStreamBuffer,
+ *                                                ( void * ) ucRxData,
+ *                                                sizeof( ucRxData ),
+ *                                                &xHigherPriorityTaskWoken );
+ *
+ *  if( xReceivedBytes > 0 )
+ *  {
+ *      // ucRxData contains xReceivedBytes read from the stream buffer.
+ *      // Process the stream here....
+ *  }
+ *
+ *  // If xHigherPriorityTaskWoken was set to pdTRUE inside
+ *  // xStreamBufferReceiveFromISR() then a task that has a priority above the
+ *  // priority of the currently executing task was unblocked and a context
+ *  // switch should be performed to ensure the ISR returns to the unblocked
+ *  // task.  In most FreeRTOS ports this is done by simply passing
+ *  // xHigherPriorityTaskWoken into taskYIELD_FROM_ISR(), which will test the
+ *  // variables value, and perform the context switch if necessary.  Check the
+ *  // documentation for the port in use for port specific instructions.
+ *  taskYIELD_FROM_ISR( xHigherPriorityTaskWoken );
+ * }
+ * @endcode
+ * \defgroup xStreamBufferReceiveFromISR xStreamBufferReceiveFromISR
+ * \ingroup StreamBufferManagement
+ */
+size_t xStreamBufferReceiveFromISR( StreamBufferHandle_t xStreamBuffer,
+                                    void * pvRxData,
+                                    size_t xBufferLengthBytes,
+                                    BaseType_t * const pxHigherPriorityTaskWoken ) PRIVILEGED_FUNCTION;
+
+/**
+ * stream_buffer.h
+ *
+ * @code{c}
+ * void vStreamBufferDelete( StreamBufferHandle_t xStreamBuffer );
+ * @endcode
+ *
+ * Deletes a stream buffer that was previously created using a call to
+ * xStreamBufferCreate() or xStreamBufferCreateStatic().  If the stream
+ * buffer was created using dynamic memory (that is, by xStreamBufferCreate()),
+ * then the allocated memory is freed.
+ *
+ * A stream buffer handle must not be used after the stream buffer has been
+ * deleted.
+ *
+ * @param xStreamBuffer The handle of the stream buffer to be deleted.
+ *
+ * \defgroup vStreamBufferDelete vStreamBufferDelete
+ * \ingroup StreamBufferManagement
+ */
+void vStreamBufferDelete( StreamBufferHandle_t xStreamBuffer ) PRIVILEGED_FUNCTION;
+
+/**
+ * stream_buffer.h
+ *
+ * @code{c}
+ * BaseType_t xStreamBufferIsFull( StreamBufferHandle_t xStreamBuffer );
+ * @endcode
+ *
+ * Queries a stream buffer to see if it is full.  A stream buffer is full if it
+ * does not have any free space, and therefore cannot accept any more data.
+ *
+ * @param xStreamBuffer The handle of the stream buffer being queried.
+ *
+ * @return If the stream buffer is full then pdTRUE is returned.  Otherwise
+ * pdFALSE is returned.
+ *
+ * \defgroup xStreamBufferIsFull xStreamBufferIsFull
+ * \ingroup StreamBufferManagement
+ */
+BaseType_t xStreamBufferIsFull( StreamBufferHandle_t xStreamBuffer ) PRIVILEGED_FUNCTION;
+
+/**
+ * stream_buffer.h
+ *
+ * @code{c}
+ * BaseType_t xStreamBufferIsEmpty( StreamBufferHandle_t xStreamBuffer );
+ * @endcode
+ *
+ * Queries a stream buffer to see if it is empty.  A stream buffer is empty if
+ * it does not contain any data.
+ *
+ * @param xStreamBuffer The handle of the stream buffer being queried.
+ *
+ * @return If the stream buffer is empty then pdTRUE is returned.  Otherwise
+ * pdFALSE is returned.
+ *
+ * \defgroup xStreamBufferIsEmpty xStreamBufferIsEmpty
+ * \ingroup StreamBufferManagement
+ */
+BaseType_t xStreamBufferIsEmpty( StreamBufferHandle_t xStreamBuffer ) PRIVILEGED_FUNCTION;
+
+/**
+ * stream_buffer.h
+ *
+ * @code{c}
+ * BaseType_t xStreamBufferReset( StreamBufferHandle_t xStreamBuffer );
+ * @endcode
+ *
+ * Resets a stream buffer to its initial, empty, state.  Any data that was in
+ * the stream buffer is discarded.  A stream buffer can only be reset if there
+ * are no tasks blocked waiting to either send to or receive from the stream
+ * buffer.
+ *
+ * @param xStreamBuffer The handle of the stream buffer being reset.
+ *
+ * @return If the stream buffer is reset then pdPASS is returned.  If there was
+ * a task blocked waiting to send to or read from the stream buffer then the
+ * stream buffer is not reset and pdFAIL is returned.
+ *
+ * \defgroup xStreamBufferReset xStreamBufferReset
+ * \ingroup StreamBufferManagement
+ */
+BaseType_t xStreamBufferReset( StreamBufferHandle_t xStreamBuffer ) PRIVILEGED_FUNCTION;
+
+/**
+ * stream_buffer.h
+ *
+ * @code{c}
+ * size_t xStreamBufferSpacesAvailable( StreamBufferHandle_t xStreamBuffer );
+ * @endcode
+ *
+ * Queries a stream buffer to see how much free space it contains, which is
+ * equal to the amount of data that can be sent to the stream buffer before it
+ * is full.
+ *
+ * @param xStreamBuffer The handle of the stream buffer being queried.
+ *
+ * @return The number of bytes that can be written to the stream buffer before
+ * the stream buffer would be full.
+ *
+ * \defgroup xStreamBufferSpacesAvailable xStreamBufferSpacesAvailable
+ * \ingroup StreamBufferManagement
+ */
+size_t xStreamBufferSpacesAvailable( StreamBufferHandle_t xStreamBuffer ) PRIVILEGED_FUNCTION;
+
+/**
+ * stream_buffer.h
+ *
+ * @code{c}
+ * size_t xStreamBufferBytesAvailable( StreamBufferHandle_t xStreamBuffer );
+ * @endcode
+ *
+ * Queries a stream buffer to see how much data it contains, which is equal to
+ * the number of bytes that can be read from the stream buffer before the stream
+ * buffer would be empty.
+ *
+ * @param xStreamBuffer The handle of the stream buffer being queried.
+ *
+ * @return The number of bytes that can be read from the stream buffer before
+ * the stream buffer would be empty.
+ *
+ * \defgroup xStreamBufferBytesAvailable xStreamBufferBytesAvailable
+ * \ingroup StreamBufferManagement
+ */
+size_t xStreamBufferBytesAvailable( StreamBufferHandle_t xStreamBuffer ) PRIVILEGED_FUNCTION;
+
+/**
+ * stream_buffer.h
+ *
+ * @code{c}
+ * BaseType_t xStreamBufferSetTriggerLevel( StreamBufferHandle_t xStreamBuffer, size_t xTriggerLevel );
+ * @endcode
+ *
+ * A stream buffer's trigger level is the number of bytes that must be in the
+ * stream buffer before a task that is blocked on the stream buffer to
+ * wait for data is moved out of the blocked state.  For example, if a task is
+ * blocked on a read of an empty stream buffer that has a trigger level of 1
+ * then the task will be unblocked when a single byte is written to the buffer
+ * or the task's block time expires.  As another example, if a task is blocked
+ * on a read of an empty stream buffer that has a trigger level of 10 then the
+ * task will not be unblocked until the stream buffer contains at least 10 bytes
+ * or the task's block time expires.  If a reading task's block time expires
+ * before the trigger level is reached then the task will still receive however
+ * many bytes are actually available.  Setting a trigger level of 0 will result
+ * in a trigger level of 1 being used.  It is not valid to specify a trigger
+ * level that is greater than the buffer size.
+ *
+ * A trigger level is set when the stream buffer is created, and can be modified
+ * using xStreamBufferSetTriggerLevel().
+ *
+ * @param xStreamBuffer The handle of the stream buffer being updated.
+ *
+ * @param xTriggerLevel The new trigger level for the stream buffer.
+ *
+ * @return If xTriggerLevel was less than or equal to the stream buffer's length
+ * then the trigger level will be updated and pdTRUE is returned.  Otherwise
+ * pdFALSE is returned.
+ *
+ * \defgroup xStreamBufferSetTriggerLevel xStreamBufferSetTriggerLevel
+ * \ingroup StreamBufferManagement
+ */
+BaseType_t xStreamBufferSetTriggerLevel( StreamBufferHandle_t xStreamBuffer,
+                                         size_t xTriggerLevel ) PRIVILEGED_FUNCTION;
+
+/**
+ * stream_buffer.h
+ *
+ * @code{c}
+ * BaseType_t xStreamBufferSendCompletedFromISR( StreamBufferHandle_t xStreamBuffer, BaseType_t *pxHigherPriorityTaskWoken );
+ * @endcode
+ *
+ * For advanced users only.
+ *
+ * The sbSEND_COMPLETED() macro is called from within the FreeRTOS APIs when
+ * data is sent to a message buffer or stream buffer.  If there was a task that
+ * was blocked on the message or stream buffer waiting for data to arrive then
+ * the sbSEND_COMPLETED() macro sends a notification to the task to remove it
+ * from the Blocked state.  xStreamBufferSendCompletedFromISR() does the same
+ * thing.  It is provided to enable application writers to implement their own
+ * version of sbSEND_COMPLETED(), and MUST NOT BE USED AT ANY OTHER TIME.
+ *
+ * See the example implemented in FreeRTOS/Demo/Minimal/MessageBufferAMP.c for
+ * additional information.
+ *
+ * @param xStreamBuffer The handle of the stream buffer to which data was
+ * written.
+ *
+ * @param pxHigherPriorityTaskWoken *pxHigherPriorityTaskWoken should be
+ * initialised to pdFALSE before it is passed into
+ * xStreamBufferSendCompletedFromISR().  If calling
+ * xStreamBufferSendCompletedFromISR() removes a task from the Blocked state,
+ * and the task has a priority above the priority of the currently running task,
+ * then *pxHigherPriorityTaskWoken will get set to pdTRUE indicating that a
+ * context switch should be performed before exiting the ISR.
+ *
+ * @return If a task was removed from the Blocked state then pdTRUE is returned.
+ * Otherwise pdFALSE is returned.
+ *
+ * \defgroup xStreamBufferSendCompletedFromISR xStreamBufferSendCompletedFromISR
+ * \ingroup StreamBufferManagement
+ */
+BaseType_t xStreamBufferSendCompletedFromISR( StreamBufferHandle_t xStreamBuffer,
+                                              BaseType_t * pxHigherPriorityTaskWoken ) PRIVILEGED_FUNCTION;
+
+/**
+ * stream_buffer.h
+ *
+ * @code{c}
+ * BaseType_t xStreamBufferReceiveCompletedFromISR( StreamBufferHandle_t xStreamBuffer, BaseType_t *pxHigherPriorityTaskWoken );
+ * @endcode
+ *
+ * For advanced users only.
+ *
+ * The sbRECEIVE_COMPLETED() macro is called from within the FreeRTOS APIs when
+ * data is read out of a message buffer or stream buffer.  If there was a task
+ * that was blocked on the message or stream buffer waiting for data to arrive
+ * then the sbRECEIVE_COMPLETED() macro sends a notification to the task to
+ * remove it from the Blocked state.  xStreamBufferReceiveCompletedFromISR()
+ * does the same thing.  It is provided to enable application writers to
+ * implement their own version of sbRECEIVE_COMPLETED(), and MUST NOT BE USED AT
+ * ANY OTHER TIME.
+ *
+ * See the example implemented in FreeRTOS/Demo/Minimal/MessageBufferAMP.c for
+ * additional information.
+ *
+ * @param xStreamBuffer The handle of the stream buffer from which data was
+ * read.
+ *
+ * @param pxHigherPriorityTaskWoken *pxHigherPriorityTaskWoken should be
+ * initialised to pdFALSE before it is passed into
+ * xStreamBufferReceiveCompletedFromISR().  If calling
+ * xStreamBufferReceiveCompletedFromISR() removes a task from the Blocked state,
+ * and the task has a priority above the priority of the currently running task,
+ * then *pxHigherPriorityTaskWoken will get set to pdTRUE indicating that a
+ * context switch should be performed before exiting the ISR.
+ *
+ * @return If a task was removed from the Blocked state then pdTRUE is returned.
+ * Otherwise pdFALSE is returned.
+ *
+ * \defgroup xStreamBufferReceiveCompletedFromISR xStreamBufferReceiveCompletedFromISR
+ * \ingroup StreamBufferManagement
+ */
+BaseType_t xStreamBufferReceiveCompletedFromISR( StreamBufferHandle_t xStreamBuffer,
+                                                 BaseType_t * pxHigherPriorityTaskWoken ) PRIVILEGED_FUNCTION;
+
+/* Functions below here are not part of the public API. */
+StreamBufferHandle_t xStreamBufferGenericCreate( size_t xBufferSizeBytes,
+                                                 size_t xTriggerLevelBytes,
+                                                 BaseType_t xIsMessageBuffer ) PRIVILEGED_FUNCTION;
+
+StreamBufferHandle_t xStreamBufferGenericCreateStatic( size_t xBufferSizeBytes,
+                                                       size_t xTriggerLevelBytes,
+                                                       BaseType_t xIsMessageBuffer,
+                                                       uint8_t * const pucStreamBufferStorageArea,
+                                                       StaticStreamBuffer_t * const pxStaticStreamBuffer ) PRIVILEGED_FUNCTION;
+
+size_t xStreamBufferNextMessageLengthBytes( StreamBufferHandle_t xStreamBuffer ) PRIVILEGED_FUNCTION;
+
+#if ( configUSE_TRACE_FACILITY == 1 )
+    void vStreamBufferSetStreamBufferNumber( StreamBufferHandle_t xStreamBuffer,
+                                             UBaseType_t uxStreamBufferNumber ) PRIVILEGED_FUNCTION;
+    UBaseType_t uxStreamBufferGetStreamBufferNumber( StreamBufferHandle_t xStreamBuffer ) PRIVILEGED_FUNCTION;
+    uint8_t ucStreamBufferGetStreamBufferType( StreamBufferHandle_t xStreamBuffer ) PRIVILEGED_FUNCTION;
+#endif
+
+/* *INDENT-OFF* */
+#if defined( __cplusplus )
+    }
+#endif
+/* *INDENT-ON* */
+
+#endif /* !defined( STREAM_BUFFER_H ) */

prj/TCPClient/FreeRTOS/list.c

@@ -0,0 +1,215 @@
+/*
+ * FreeRTOS Kernel V10.4.6
+ * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * https://www.FreeRTOS.org
+ * https://github.com/FreeRTOS
+ *
+ */
+
+
+#include <stdlib.h>
+
+/* Defining MPU_WRAPPERS_INCLUDED_FROM_API_FILE prevents task.h from redefining
+ * all the API functions to use the MPU wrappers.  That should only be done when
+ * task.h is included from an application file. */
+#define MPU_WRAPPERS_INCLUDED_FROM_API_FILE
+
+#include "FreeRTOS.h"
+#include "list.h"
+
+/* Lint e9021, e961 and e750 are suppressed as a MISRA exception justified
+ * because the MPU ports require MPU_WRAPPERS_INCLUDED_FROM_API_FILE to be
+ * defined for the header files above, but not in this file, in order to
+ * generate the correct privileged Vs unprivileged linkage and placement. */
+#undef MPU_WRAPPERS_INCLUDED_FROM_API_FILE /*lint !e961 !e750 !e9021. */
+
+/*-----------------------------------------------------------
+* PUBLIC LIST API documented in list.h
+*----------------------------------------------------------*/
+
+void vListInitialise( List_t * const pxList )
+{
+    /* The list structure contains a list item which is used to mark the
+     * end of the list.  To initialise the list the list end is inserted
+     * as the only list entry. */
+    pxList->pxIndex = ( ListItem_t * ) &( pxList->xListEnd ); /*lint !e826 !e740 !e9087 The mini list structure is used as the list end to save RAM.  This is checked and valid. */
+
+    /* The list end value is the highest possible value in the list to
+     * ensure it remains at the end of the list. */
+    pxList->xListEnd.xItemValue = portMAX_DELAY;
+
+    /* The list end next and previous pointers point to itself so we know
+     * when the list is empty. */
+    pxList->xListEnd.pxNext = ( ListItem_t * ) &( pxList->xListEnd );     /*lint !e826 !e740 !e9087 The mini list structure is used as the list end to save RAM.  This is checked and valid. */
+    pxList->xListEnd.pxPrevious = ( ListItem_t * ) &( pxList->xListEnd ); /*lint !e826 !e740 !e9087 The mini list structure is used as the list end to save RAM.  This is checked and valid. */
+
+    pxList->uxNumberOfItems = ( UBaseType_t ) 0U;
+
+    /* Write known values into the list if
+     * configUSE_LIST_DATA_INTEGRITY_CHECK_BYTES is set to 1. */
+    listSET_LIST_INTEGRITY_CHECK_1_VALUE( pxList );
+    listSET_LIST_INTEGRITY_CHECK_2_VALUE( pxList );
+}
+/*-----------------------------------------------------------*/
+
+void vListInitialiseItem( ListItem_t * const pxItem )
+{
+    /* Make sure the list item is not recorded as being on a list. */
+    pxItem->pxContainer = NULL;
+
+    /* Write known values into the list item if
+     * configUSE_LIST_DATA_INTEGRITY_CHECK_BYTES is set to 1. */
+    listSET_FIRST_LIST_ITEM_INTEGRITY_CHECK_VALUE( pxItem );
+    listSET_SECOND_LIST_ITEM_INTEGRITY_CHECK_VALUE( pxItem );
+}
+/*-----------------------------------------------------------*/
+
+void vListInsertEnd( List_t * const pxList,
+                     ListItem_t * const pxNewListItem )
+{
+    ListItem_t * const pxIndex = pxList->pxIndex;
+
+    /* Only effective when configASSERT() is also defined, these tests may catch
+     * the list data structures being overwritten in memory.  They will not catch
+     * data errors caused by incorrect configuration or use of FreeRTOS. */
+    listTEST_LIST_INTEGRITY( pxList );
+    listTEST_LIST_ITEM_INTEGRITY( pxNewListItem );
+
+    /* Insert a new list item into pxList, but rather than sort the list,
+     * makes the new list item the last item to be removed by a call to
+     * listGET_OWNER_OF_NEXT_ENTRY(). */
+    pxNewListItem->pxNext = pxIndex;
+    pxNewListItem->pxPrevious = pxIndex->pxPrevious;
+
+    /* Only used during decision coverage testing. */
+    mtCOVERAGE_TEST_DELAY();
+
+    pxIndex->pxPrevious->pxNext = pxNewListItem;
+    pxIndex->pxPrevious = pxNewListItem;
+
+    /* Remember which list the item is in. */
+    pxNewListItem->pxContainer = pxList;
+
+    ( pxList->uxNumberOfItems )++;
+}
+/*-----------------------------------------------------------*/
+
+void vListInsert( List_t * const pxList,
+                  ListItem_t * const pxNewListItem )
+{
+    ListItem_t * pxIterator;
+    const TickType_t xValueOfInsertion = pxNewListItem->xItemValue;
+
+    /* Only effective when configASSERT() is also defined, these tests may catch
+     * the list data structures being overwritten in memory.  They will not catch
+     * data errors caused by incorrect configuration or use of FreeRTOS. */
+    listTEST_LIST_INTEGRITY( pxList );
+    listTEST_LIST_ITEM_INTEGRITY( pxNewListItem );
+
+    /* Insert the new list item into the list, sorted in xItemValue order.
+     *
+     * If the list already contains a list item with the same item value then the
+     * new list item should be placed after it.  This ensures that TCBs which are
+     * stored in ready lists (all of which have the same xItemValue value) get a
+     * share of the CPU.  However, if the xItemValue is the same as the back marker
+     * the iteration loop below will not end.  Therefore the value is checked
+     * first, and the algorithm slightly modified if necessary. */
+    if( xValueOfInsertion == portMAX_DELAY )
+    {
+        pxIterator = pxList->xListEnd.pxPrevious;
+    }
+    else
+    {
+        /* *** NOTE ***********************************************************
+        *  If you find your application is crashing here then likely causes are
+        *  listed below.  In addition see https://www.FreeRTOS.org/FAQHelp.html for
+        *  more tips, and ensure configASSERT() is defined!
+        *  https://www.FreeRTOS.org/a00110.html#configASSERT
+        *
+        *   1) Stack overflow -
+        *      see https://www.FreeRTOS.org/Stacks-and-stack-overflow-checking.html
+        *   2) Incorrect interrupt priority assignment, especially on Cortex-M
+        *      parts where numerically high priority values denote low actual
+        *      interrupt priorities, which can seem counter intuitive.  See
+        *      https://www.FreeRTOS.org/RTOS-Cortex-M3-M4.html and the definition
+        *      of configMAX_SYSCALL_INTERRUPT_PRIORITY on
+        *      https://www.FreeRTOS.org/a00110.html
+        *   3) Calling an API function from within a critical section or when
+        *      the scheduler is suspended, or calling an API function that does
+        *      not end in "FromISR" from an interrupt.
+        *   4) Using a queue or semaphore before it has been initialised or
+        *      before the scheduler has been started (are interrupts firing
+        *      before vTaskStartScheduler() has been called?).
+        *   5) If the FreeRTOS port supports interrupt nesting then ensure that
+        *      the priority of the tick interrupt is at or below
+        *      configMAX_SYSCALL_INTERRUPT_PRIORITY.
+        **********************************************************************/
+
+        for( pxIterator = ( ListItem_t * ) &( pxList->xListEnd ); pxIterator->pxNext->xItemValue <= xValueOfInsertion; pxIterator = pxIterator->pxNext ) /*lint !e826 !e740 !e9087 The mini list structure is used as the list end to save RAM.  This is checked and valid. *//*lint !e440 The iterator moves to a different value, not xValueOfInsertion. */
+        {
+            /* There is nothing to do here, just iterating to the wanted
+             * insertion position. */
+        }
+    }
+
+    pxNewListItem->pxNext = pxIterator->pxNext;
+    pxNewListItem->pxNext->pxPrevious = pxNewListItem;
+    pxNewListItem->pxPrevious = pxIterator;
+    pxIterator->pxNext = pxNewListItem;
+
+    /* Remember which list the item is in.  This allows fast removal of the
+     * item later. */
+    pxNewListItem->pxContainer = pxList;
+
+    ( pxList->uxNumberOfItems )++;
+}
+/*-----------------------------------------------------------*/
+
+UBaseType_t uxListRemove( ListItem_t * const pxItemToRemove )
+{
+/* The list item knows which list it is in.  Obtain the list from the list
+ * item. */
+    List_t * const pxList = pxItemToRemove->pxContainer;
+
+    pxItemToRemove->pxNext->pxPrevious = pxItemToRemove->pxPrevious;
+    pxItemToRemove->pxPrevious->pxNext = pxItemToRemove->pxNext;
+
+    /* Only used during decision coverage testing. */
+    mtCOVERAGE_TEST_DELAY();
+
+    /* Make sure the index is left pointing to a valid item. */
+    if( pxList->pxIndex == pxItemToRemove )
+    {
+        pxList->pxIndex = pxItemToRemove->pxPrevious;
+    }
+    else
+    {
+        mtCOVERAGE_TEST_MARKER();
+    }
+
+    pxItemToRemove->pxContainer = NULL;
+    ( pxList->uxNumberOfItems )--;
+
+    return pxList->uxNumberOfItems;
+}
+/*-----------------------------------------------------------*/

prj/TCPClient/FreeRTOS/portable/GCC/RISC-V/Documentation.url

@@ -0,0 +1,5 @@
+[{000214A0-0000-0000-C000-000000000046}]
+Prop3=19,11
+[InternetShortcut]
+IDList=
+URL=https://www.FreeRTOS.org/Using-FreeRTOS-on-RISC-V.html

prj/TCPClient/FreeRTOS/portable/GCC/RISC-V/chip_specific_extensions/RV32I_PFIC_no_extensions/freertos_risc_v_chip_specific_extensions.h

@@ -0,0 +1,150 @@
+/*
+ * FreeRTOS Kernel V10.4.6
+ * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * https://www.FreeRTOS.org
+ * https://github.com/FreeRTOS
+ *
+ */
+
+/*
+ * The FreeRTOS kernel's RISC-V port is split between the the code that is
+ * common across all currently supported RISC-V chips (implementations of the
+ * RISC-V ISA), and code that tailors the port to a specific RISC-V chip:
+ *
+ * + FreeRTOS\Source\portable\GCC\RISC-V-RV32\portASM.S contains the code that
+ *   is common to all currently supported RISC-V chips.  There is only one
+ *   portASM.S file because the same file is built for all RISC-V target chips.
+ *
+ * + Header files called freertos_risc_v_chip_specific_extensions.h contain the
+ *   code that tailors the FreeRTOS kernel's RISC-V port to a specific RISC-V
+ *   chip.  There are multiple freertos_risc_v_chip_specific_extensions.h files
+ *   as there are multiple RISC-V chip implementations.
+ *
+ * !!!NOTE!!!
+ * TAKE CARE TO INCLUDE THE CORRECT freertos_risc_v_chip_specific_extensions.h
+ * HEADER FILE FOR THE CHIP IN USE.  This is done using the assembler's (not the
+ * compiler's!) include path.  For example, if the chip in use includes a core
+ * local interrupter (CLINT) and does not include any chip specific register
+ * extensions then add the path below to the assembler's include path:
+ * FreeRTOS\Source\portable\GCC\RISC-V-RV32\chip_specific_extensions\RV32I_CLINT_no_extensions
+ *
+ */
+
+
+#ifndef __FREERTOS_RISC_V_EXTENSIONS_H__
+#define __FREERTOS_RISC_V_EXTENSIONS_H__
+
+#define portasmHAS_SIFIVE_CLINT 0
+#define portasmHAS_MTIME 0
+/* if you want to use FPU, please define ARCH_FPU and enable float point and ABI of gcc */
+#define ARCH_FPU 0
+
+
+#if ARCH_FPU
+#define portasmADDITIONAL_CONTEXT_SIZE 32 /* Must be even number on 32-bit cores. */
+.macro portasmSAVE_ADDITIONAL_REGISTERS
+    addi sp, sp, -(portasmADDITIONAL_CONTEXT_SIZE* portWORD_SIZE)
+    fsw f0, 1*portWORD_SIZE(sp)
+    fsw f1, 2*portWORD_SIZE(sp)
+    fsw f2, 3*portWORD_SIZE(sp)
+    fsw f3, 4*portWORD_SIZE(sp)
+    fsw f4, 5*portWORD_SIZE(sp)
+    fsw f5, 6*portWORD_SIZE(sp)
+    fsw f6, 7*portWORD_SIZE(sp)
+    fsw f7, 8*portWORD_SIZE(sp)
+    fsw f8, 9*portWORD_SIZE(sp)
+    fsw f9, 10*portWORD_SIZE(sp)
+    fsw f10, 11*portWORD_SIZE(sp)
+    fsw f11, 12*portWORD_SIZE(sp)
+    fsw f12, 13*portWORD_SIZE(sp)
+    fsw f13, 14*portWORD_SIZE(sp)
+    fsw f14, 15*portWORD_SIZE(sp)
+    fsw f15, 16*portWORD_SIZE(sp)
+    fsw f16, 17*portWORD_SIZE(sp)
+    fsw f17, 18*portWORD_SIZE(sp)
+    fsw f18, 19*portWORD_SIZE(sp)
+    fsw f19, 20*portWORD_SIZE(sp)
+    fsw f20, 21*portWORD_SIZE(sp)
+    fsw f21, 22*portWORD_SIZE(sp)
+    fsw f22, 23*portWORD_SIZE(sp)
+    fsw f23, 24*portWORD_SIZE(sp)
+    fsw f24, 25*portWORD_SIZE(sp)
+    fsw f25, 26*portWORD_SIZE(sp)
+    fsw f26, 27*portWORD_SIZE(sp)
+    fsw f27, 28*portWORD_SIZE(sp)
+    fsw f28, 29*portWORD_SIZE(sp)
+    fsw f29, 30*portWORD_SIZE(sp)
+    fsw f30, 31*portWORD_SIZE(sp)
+    fsw f31, 32*portWORD_SIZE(sp)
+	.endm
+
+.macro portasmRESTORE_ADDITIONAL_REGISTERS
+    flw f0, 1*portWORD_SIZE(sp)
+    flw f1, 2*portWORD_SIZE(sp)
+    flw f2, 3*portWORD_SIZE(sp)
+    flw f3, 4*portWORD_SIZE(sp)
+    flw f4, 5*portWORD_SIZE(sp)
+    flw f5, 6*portWORD_SIZE(sp)
+    flw f6, 7*portWORD_SIZE(sp)
+    flw f7, 8*portWORD_SIZE(sp)
+    flw f8, 9*portWORD_SIZE(sp)
+    flw f9, 10*portWORD_SIZE(sp)
+    flw f10, 11*portWORD_SIZE(sp)
+    flw f11, 12*portWORD_SIZE(sp)
+    flw f12, 13*portWORD_SIZE(sp)
+    flw f13, 14*portWORD_SIZE(sp)
+    flw f14, 15*portWORD_SIZE(sp)
+    flw f15, 16*portWORD_SIZE(sp)
+    flw f16, 17*portWORD_SIZE(sp)
+    flw f17, 18*portWORD_SIZE(sp)
+    flw f18, 19*portWORD_SIZE(sp)
+    flw f19, 20*portWORD_SIZE(sp)
+    flw f20, 21*portWORD_SIZE(sp)
+    flw f21, 22*portWORD_SIZE(sp)
+    flw f22, 23*portWORD_SIZE(sp)
+    flw f23, 24*portWORD_SIZE(sp)
+    flw f24, 25*portWORD_SIZE(sp)
+    flw f25, 26*portWORD_SIZE(sp)
+    flw f26, 27*portWORD_SIZE(sp)
+    flw f27, 28*portWORD_SIZE(sp)
+    flw f28, 29*portWORD_SIZE(sp)
+    flw f29, 30*portWORD_SIZE(sp)
+    flw f30, 31*portWORD_SIZE(sp)
+    flw f31, 32*portWORD_SIZE(sp)
+    addi sp, sp, (portasmADDITIONAL_CONTEXT_SIZE* portWORD_SIZE)
+	.endm
+#else
+#define portasmADDITIONAL_CONTEXT_SIZE 0 /* Must be even number on 32-bit cores. */
+
+
+.macro portasmSAVE_ADDITIONAL_REGISTERS
+    /* No additional registers to save, so this macro does nothing. */
+    .endm
+
+.macro portasmRESTORE_ADDITIONAL_REGISTERS
+    /* No additional registers to restore, so this macro does nothing. */
+    .endm
+
+#endif
+
+#endif /* __FREERTOS_RISC_V_EXTENSIONS_H__ */

prj/TCPClient/FreeRTOS/portable/GCC/RISC-V/chip_specific_extensions/readme.txt

@@ -0,0 +1,23 @@
+/*
+ * The FreeRTOS kernel's RISC-V port is split between the the code that is
+ * common across all currently supported RISC-V chips (implementations of the
+ * RISC-V ISA), and code that tailors the port to a specific RISC-V chip:
+ *
+ * + FreeRTOS\Source\portable\GCC\RISC-V-RV32\portASM.S contains the code that
+ *   is common to all currently supported RISC-V chips.  There is only one
+ *   portASM.S file because the same file is built for all RISC-V target chips.
+ *
+ * + Header files called freertos_risc_v_chip_specific_extensions.h contain the
+ *   code that tailors the FreeRTOS kernel's RISC-V port to a specific RISC-V
+ *   chip.  There are multiple freertos_risc_v_chip_specific_extensions.h files
+ *   as there are multiple RISC-V chip implementations.
+ *
+ * !!!NOTE!!!
+ * TAKE CARE TO INCLUDE THE CORRECT freertos_risc_v_chip_specific_extensions.h
+ * HEADER FILE FOR THE CHIP IN USE.  This is done using the assembler's (not the
+ * compiler's!) include path.  For example, if the chip in use includes a core
+ * local interrupter (CLINT) and does not include any chip specific register
+ * extensions then add the path below to the assembler's include path:
+ * FreeRTOS\Source\portable\GCC\RISC-V-RV32\chip_specific_extensions\RV32I_CLINT_no_extensions
+ *
+ */

prj/TCPClient/FreeRTOS/portable/GCC/RISC-V/port.c

@@ -0,0 +1,280 @@
+/*
+ * FreeRTOS Kernel V10.4.6
+ * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * https://www.FreeRTOS.org
+ * https://github.com/FreeRTOS
+ *
+ */
+
+/*-----------------------------------------------------------
+ * Implementation of functions defined in portable.h for the RISC-V RV32 port.
+ *----------------------------------------------------------*/
+
+/* Scheduler includes. */
+#include "FreeRTOS.h"
+#include "task.h"
+#include "portmacro.h"
+
+/* Standard includes. */
+#include "string.h"
+
+#ifdef configCLINT_BASE_ADDRESS
+	#warning The configCLINT_BASE_ADDRESS constant has been deprecated.  configMTIME_BASE_ADDRESS and configMTIMECMP_BASE_ADDRESS are currently being derived from the (possibly 0) configCLINT_BASE_ADDRESS setting.  Please update to define configMTIME_BASE_ADDRESS and configMTIMECMP_BASE_ADDRESS dirctly in place of configCLINT_BASE_ADDRESS.  See https://www.FreeRTOS.org/Using-FreeRTOS-on-RISC-V.html
+#endif
+
+#ifndef configMTIME_BASE_ADDRESS
+	#warning configMTIME_BASE_ADDRESS must be defined in FreeRTOSConfig.h.  If the target chip includes a memory-mapped mtime register then set configMTIME_BASE_ADDRESS to the mapped address.  Otherwise set configMTIME_BASE_ADDRESS to 0.  See https://www.FreeRTOS.org/Using-FreeRTOS-on-RISC-V.html
+#endif
+
+#ifndef configMTIMECMP_BASE_ADDRESS
+	#warning configMTIMECMP_BASE_ADDRESS must be defined in FreeRTOSConfig.h.  If the target chip includes a memory-mapped mtimecmp register then set configMTIMECMP_BASE_ADDRESS to the mapped address.  Otherwise set configMTIMECMP_BASE_ADDRESS to 0.  See https://www.FreeRTOS.org/Using-FreeRTOS-on-RISC-V.html
+#endif
+
+/* Let the user override the pre-loading of the initial LR with the address of
+prvTaskExitError() in case it messes up unwinding of the stack in the
+debugger. */
+#ifdef configTASK_RETURN_ADDRESS
+	#define portTASK_RETURN_ADDRESS	configTASK_RETURN_ADDRESS
+#else
+	#define portTASK_RETURN_ADDRESS	prvTaskExitError
+#endif
+
+/* The stack used by interrupt service routines.  Set configISR_STACK_SIZE_WORDS
+to use a statically allocated array as the interrupt stack.  Alternative leave
+configISR_STACK_SIZE_WORDS undefined and update the linker script so that a
+linker variable names __freertos_irq_stack_top has the same value as the top
+of the stack used by main.  Using the linker script method will repurpose the
+stack that was used by main before the scheduler was started for use as the
+interrupt stack after the scheduler has started. */
+#ifdef configISR_STACK_SIZE_WORDS
+	static __attribute__ ((aligned(16))) StackType_t xISRStack[ configISR_STACK_SIZE_WORDS ] = { 0 };
+	const StackType_t xISRStackTop = ( StackType_t ) &( xISRStack[ configISR_STACK_SIZE_WORDS & ~portBYTE_ALIGNMENT_MASK ] );
+
+	/* Don't use 0xa5 as the stack fill bytes as that is used by the kernerl for
+	the task stacks, and so will legitimately appear in many positions within
+	the ISR stack. */
+	#define portISR_STACK_FILL_BYTE	0xee
+#else
+	/* __freertos_irq_stack_top define by .ld file */
+	extern const uint32_t __freertos_irq_stack_top[];
+	const StackType_t xISRStackTop = ( StackType_t ) __freertos_irq_stack_top;
+#endif
+
+static UBaseType_t uxCriticalNesting = 0xaaaaaaaa;
+/*
+ * Setup the timer to generate the tick interrupts.  The implementation in this
+ * file is weak to allow application writers to change the timer used to
+ * generate the tick interrupt.
+ */
+void vPortSetupTimerInterrupt( void ) __attribute__(( weak ));
+
+/*-----------------------------------------------------------*/
+#if( configMTIME_BASE_ADDRESS != 0 ) && ( configMTIMECMP_BASE_ADDRESS != 0 )
+/* Used to program the machine timer compare register. */
+uint64_t ullNextTime = 0ULL;
+const uint64_t *pullNextTime = &ullNextTime;
+const uint64_t uxTimerIncrementsForOneTick = ( uint64_t) ( ( configCPU_CLOCK_HZ )/( configTICK_RATE_HZ ) ); /* Assumes increment won't go over 32-bits. */
+uint64_t const ullMachineTimerCompareRegisterBase = configMTIMECMP_BASE_ADDRESS;
+volatile uint64_t * pullMachineTimerCompareRegister = NULL;
+#endif
+
+/* Set configCHECK_FOR_STACK_OVERFLOW to 3 to add ISR stack checking to task
+stack checking.  A problem in the ISR stack will trigger an assert, not call the
+stack overflow hook function (because the stack overflow hook is specific to a
+task stack, not the ISR stack). */
+#if defined( configISR_STACK_SIZE_WORDS ) && ( configCHECK_FOR_STACK_OVERFLOW > 2 )
+	#warning This path not tested, or even compiled yet.
+
+	static const uint8_t ucExpectedStackBytes[] = {
+									portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE,		\
+									portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE,		\
+									portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE,		\
+									portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE,		\
+									portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE, portISR_STACK_FILL_BYTE };	\
+
+	#define portCHECK_ISR_STACK() configASSERT( ( memcmp( ( void * ) xISRStack, ( void * ) ucExpectedStackBytes, sizeof( ucExpectedStackBytes ) ) == 0 ) )
+#else
+	/* Define the function away. */
+	#define portCHECK_ISR_STACK()
+#endif /* configCHECK_FOR_STACK_OVERFLOW > 2 */
+
+/*-----------------------------------------------------------*/
+
+#if( configMTIME_BASE_ADDRESS != 0 ) && ( configMTIMECMP_BASE_ADDRESS != 0 )
+
+	void vPortSetupTimerInterrupt( void )
+	{
+	uint32_t ulCurrentTimeHigh, ulCurrentTimeLow;
+	volatile uint32_t * const pulTimeHigh = ( volatile uint32_t * const ) ( ( configMTIME_BASE_ADDRESS ) + 4UL ); /* 8-byte typer so high 32-bit word is 4 bytes up. */
+	volatile uint32_t * const pulTimeLow = ( volatile uint32_t * const ) ( configMTIME_BASE_ADDRESS );
+	volatile uint32_t ulHartId;
+
+		__asm volatile( "csrr %0, mhartid" : "=r"( ulHartId ) );
+		pullMachineTimerCompareRegister  = ( volatile uint64_t * ) ( ullMachineTimerCompareRegisterBase + ( ulHartId * sizeof( uint64_t ) ) );
+
+		do
+		{
+			ulCurrentTimeHigh = *pulTimeHigh;
+			ulCurrentTimeLow = *pulTimeLow;
+		} while( ulCurrentTimeHigh != *pulTimeHigh );
+
+		ullNextTime = ( uint64_t ) ulCurrentTimeHigh;
+		ullNextTime <<= 32ULL; /* High 4-byte word is 32-bits up. */
+		ullNextTime |= ( uint64_t ) ulCurrentTimeLow;
+		ullNextTime += ( uint64_t ) uxTimerIncrementsForOneTick;
+		*pullMachineTimerCompareRegister = ullNextTime;
+
+		/* Prepare the time to use after the next tick interrupt. */
+		ullNextTime += ( uint64_t ) uxTimerIncrementsForOneTick;
+	}
+
+#else
+
+/* just for wch's systick,don't have mtime */
+void vPortSetupTimerInterrupt( void )
+{
+    /* set software is lowest priority */
+    NVIC_SetPriority(Software_IRQn,0xf0);
+    /* set systick is lowest priority */
+    NVIC_SetPriority(SysTicK_IRQn,0xf0);
+
+    SysTick->CTLR= 0;
+    SysTick->SR  = 0;
+    SysTick->CNT = 0;
+    SysTick->CMP = configCPU_CLOCK_HZ/configTICK_RATE_HZ;
+    SysTick->CTLR= 0xf;
+}
+
+#endif /* ( configMTIME_BASE_ADDRESS != 0 ) && ( configMTIME_BASE_ADDRESS != 0 ) */
+/*-----------------------------------------------------------*/
+
+BaseType_t xPortStartScheduler( void )
+{
+extern void xPortStartFirstTask( void );
+
+	#if( configASSERT_DEFINED == 1 )
+	{
+		volatile uint32_t mtvec = 0;
+
+		/* Check the least significant two bits of mtvec are 0b11 - indicating
+		multiply vector mode. */
+		__asm volatile( "csrr %0, mtvec" : "=r"( mtvec ) );
+		configASSERT( ( mtvec & 0x03UL ) == 0x3 );
+
+		/* Check alignment of the interrupt stack - which is the same as the
+		stack that was being used by main() prior to the scheduler being
+		started. */
+		configASSERT( ( xISRStackTop & portBYTE_ALIGNMENT_MASK ) == 0 );
+
+		#ifdef configISR_STACK_SIZE_WORDS
+		{
+			memset( ( void * ) xISRStack, portISR_STACK_FILL_BYTE, sizeof( xISRStack ) );
+		}
+		#endif	 /* configISR_STACK_SIZE_WORDS */
+	}
+	#endif /* configASSERT_DEFINED */
+
+	/* If there is a CLINT then it is ok to use the default implementation
+	in this file, otherwise vPortSetupTimerInterrupt() must be implemented to
+	configure whichever clock is to be used to generate the tick interrupt. */
+	vPortSetupTimerInterrupt();
+
+	#if( ( configMTIME_BASE_ADDRESS != 0 ) && ( configMTIMECMP_BASE_ADDRESS != 0 ) )
+	{
+		/* Enable mtime and external interrupts.  1<<7 for timer interrupt, 1<<11
+		for external interrupt.  _RB_ What happens here when mtime is not present as
+		with pulpino? */
+	    NVIC_EnableIRQ(SysTicK_IRQn);
+	    NVIC_EnableIRQ(Software_IRQn);
+	}
+	#else
+	{
+		/* Enable external interrupts,global interrupt is enabled at first task start. */
+	    NVIC_EnableIRQ(SysTicK_IRQn);
+	    NVIC_EnableIRQ(Software_IRQn);
+	}
+	#endif /* ( configMTIME_BASE_ADDRESS != 0 ) && ( configMTIMECMP_BASE_ADDRESS != 0 ) */
+
+    /* Initialise the critical nesting count ready for the first task. */
+    uxCriticalNesting = 0;
+	xPortStartFirstTask();
+
+	/* Should not get here as after calling xPortStartFirstTask() only tasks
+	should be executing. */
+	return pdFAIL;
+}
+/*-----------------------------------------------------------*/
+
+void vPortEndScheduler( void )
+{
+	/* Not implemented. */
+	for( ;; );
+}
+/*-----------------------------------------------------------*/
+void SysTick_Handler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
+void SysTick_Handler( void )
+{
+    GET_INT_SP();
+    portDISABLE_INTERRUPTS();
+    SysTick->SR=0;
+    if( xTaskIncrementTick() != pdFALSE )
+    {
+        portYIELD();
+    }
+    portENABLE_INTERRUPTS();
+    FREE_INT_SP();
+}
+
+/*-----------------------------------------------------------*/
+void vPortEnterCritical( void )
+{
+    portDISABLE_INTERRUPTS();
+    uxCriticalNesting++;
+}
+
+/*-----------------------------------------------------------*/
+void vPortExitCritical( void )
+{
+    configASSERT( uxCriticalNesting );
+    uxCriticalNesting--;
+
+    if( uxCriticalNesting == 0 )
+    {
+        portENABLE_INTERRUPTS();
+    }
+}
+/*-----------------------------------------------------------*/
+portUBASE_TYPE xPortSetInterruptMask(void)
+{
+    portUBASE_TYPE uvalue=0;
+    __asm volatile("csrrw %0, mstatus, %1":"=r"(uvalue):"r"(0x7800));
+    return uvalue;
+}
+
+/*-----------------------------------------------------------*/
+void vPortClearInterruptMask(portUBASE_TYPE uvalue)
+{
+    __asm volatile("csrw  mstatus, %0"::"r"(uvalue));
+}
+
+

prj/TCPClient/FreeRTOS/portable/GCC/RISC-V/portASM.S

@@ -0,0 +1,363 @@
+/*
+ * FreeRTOS Kernel V10.4.6
+ * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * https://www.FreeRTOS.org
+ * https://github.com/FreeRTOS
+ *
+ */
+
+/*
+ * The FreeRTOS kernel's RISC-V port is split between the the code that is
+ * common across all currently supported RISC-V chips (implementations of the
+ * RISC-V ISA), and code which tailors the port to a specific RISC-V chip:
+ *
+ * + The code that is common to all RISC-V chips is implemented in
+ *   FreeRTOS\Source\portable\GCC\RISC-V-RV32\portASM.S.  There is only one
+ *   portASM.S file because the same file is used no matter which RISC-V chip is
+ *   in use.
+ *
+ * + The code that tailors the kernel's RISC-V port to a specific RISC-V
+ *   chip is implemented in freertos_risc_v_chip_specific_extensions.h.  There
+ *   is one freertos_risc_v_chip_specific_extensions.h that can be used with any
+ *   RISC-V chip that both includes a standard CLINT and does not add to the
+ *   base set of RISC-V registers.  There are additional
+ *   freertos_risc_v_chip_specific_extensions.h files for RISC-V implementations
+ *   that do not include a standard CLINT or do add to the base set of RISC-V
+ *   registers.
+ *
+ * CARE MUST BE TAKEN TO INCLDUE THE CORRECT
+ * freertos_risc_v_chip_specific_extensions.h HEADER FILE FOR THE CHIP
+ * IN USE.  To include the correct freertos_risc_v_chip_specific_extensions.h
+ * header file ensure the path to the correct header file is in the assembler's
+ * include path.
+ *
+ * This freertos_risc_v_chip_specific_extensions.h is for use on RISC-V chips
+ * that include a standard CLINT and do not add to the base set of RISC-V
+ * registers.
+ *
+ */
+#if __riscv_xlen == 64
+	#define portWORD_SIZE 8
+	#define store_x sd
+	#define load_x ld
+#elif __riscv_xlen == 32
+	#define store_x sw
+	#define load_x lw
+	#define portWORD_SIZE 4
+#else
+	#error Assembler did not define __riscv_xlen
+#endif
+
+/* we define float registers at specific_extensions.h, V30x support hardware floating point unit
+can be enable by defined ARCH_FPU*/
+#include "freertos_risc_v_chip_specific_extensions.h"
+
+
+/* Check the freertos_risc_v_chip_specific_extensions.h and/or command line
+definitions. */
+#if defined( portasmHAS_CLINT ) && defined( portasmHAS_MTIME )
+	#error The portasmHAS_CLINT constant has been deprecated.  Please replace it with portasmHAS_MTIME.  portasmHAS_CLINT and portasmHAS_MTIME cannot both be defined at once.  See https://www.FreeRTOS.org/Using-FreeRTOS-on-RISC-V.html
+#endif
+
+#ifdef portasmHAS_CLINT
+	#warning The portasmHAS_CLINT constant has been deprecated.  Please replace it with portasmHAS_MTIME and portasmHAS_SIFIVE_CLINT.  For now portasmHAS_MTIME and portasmHAS_SIFIVE_CLINT are derived from portasmHAS_CLINT.  See https://www.FreeRTOS.org/Using-FreeRTOS-on-RISC-V.html
+	#define portasmHAS_MTIME portasmHAS_CLINT
+	#define portasmHAS_SIFIVE_CLINT portasmHAS_CLINT
+#endif
+
+#ifndef portasmHAS_MTIME
+	#error freertos_risc_v_chip_specific_extensions.h must define portasmHAS_MTIME to either 1 (MTIME clock present) or 0 (MTIME clock not present).  See https://www.FreeRTOS.org/Using-FreeRTOS-on-RISC-V.html
+#endif
+
+#ifndef portasmHANDLE_INTERRUPT /* don't need this define */
+#	#error portasmHANDLE_INTERRUPT must be defined to the function to be called to handle external/peripheral interrupts.  portasmHANDLE_INTERRUPT can be defined on the assembler command line or in the appropriate freertos_risc_v_chip_specific_extensions.h header file.  https://www.FreeRTOS.org/Using-FreeRTOS-on-RISC-V.html
+#endif
+
+#ifndef portasmHAS_SIFIVE_CLINT
+	#define portasmHAS_SIFIVE_CLINT 0
+#endif
+
+/* Only the standard core registers are stored by default.  Any additional
+registers must be saved by the portasmSAVE_ADDITIONAL_REGISTERS and
+portasmRESTORE_ADDITIONAL_REGISTERS macros - which can be defined in a chip
+specific version of freertos_risc_v_chip_specific_extensions.h.  See the notes
+at the top of this file. */
+#define portCONTEXT_SIZE ( 30 * portWORD_SIZE )
+
+.global xPortStartFirstTask
+.global SW_Handler
+.global pxPortInitialiseStack
+
+.extern pxCurrentTCB
+.extern vTaskSwitchContext
+.extern xISRStackTop
+/*-----------------------------------------------------------*/
+.align 8
+.func
+SW_Handler:
+	addi sp, sp, -portCONTEXT_SIZE
+	store_x x1, 1 * portWORD_SIZE( sp )
+	store_x x5, 2 * portWORD_SIZE( sp )
+	store_x x6, 3 * portWORD_SIZE( sp )
+	store_x x7, 4 * portWORD_SIZE( sp )
+	store_x x8, 5 * portWORD_SIZE( sp )
+	store_x x9, 6 * portWORD_SIZE( sp )
+	store_x x10, 7 * portWORD_SIZE( sp )
+	store_x x11, 8 * portWORD_SIZE( sp )
+	store_x x12, 9 * portWORD_SIZE( sp )
+	store_x x13, 10 * portWORD_SIZE( sp )
+	store_x x14, 11 * portWORD_SIZE( sp )
+	store_x x15, 12 * portWORD_SIZE( sp )
+	store_x x16, 13 * portWORD_SIZE( sp )
+	store_x x17, 14 * portWORD_SIZE( sp )
+	store_x x18, 15 * portWORD_SIZE( sp )
+	store_x x19, 16 * portWORD_SIZE( sp )
+	store_x x20, 17 * portWORD_SIZE( sp )
+	store_x x21, 18 * portWORD_SIZE( sp )
+	store_x x22, 19 * portWORD_SIZE( sp )
+	store_x x23, 20 * portWORD_SIZE( sp )
+	store_x x24, 21 * portWORD_SIZE( sp )
+	store_x x25, 22 * portWORD_SIZE( sp )
+	store_x x26, 23 * portWORD_SIZE( sp )
+	store_x x27, 24 * portWORD_SIZE( sp )
+	store_x x28, 25 * portWORD_SIZE( sp )
+	store_x x29, 26 * portWORD_SIZE( sp )
+	store_x x30, 27 * portWORD_SIZE( sp )
+	store_x x31, 28 * portWORD_SIZE( sp )
+
+	csrr t0, mstatus					/* Required for MPIE bit. */
+	store_x t0, 29 * portWORD_SIZE( sp )
+
+	portasmSAVE_ADDITIONAL_REGISTERS	/* Defined in freertos_risc_v_chip_specific_extensions.h to save any registers unique to the RISC-V implementation. */
+
+	load_x  t0, pxCurrentTCB			/* Load pxCurrentTCB. */
+	store_x  sp, 0( t0 )				/* Write sp to first TCB member. */
+
+	csrr a1, mepc
+	store_x a1, 0( sp )					/* Save updated exception return address. */
+
+	addi a1, x0, 0x20
+	csrs 0x804, a1
+
+	load_x sp, xISRStackTop				/* Switch to ISR stack before function call. */
+	jal vTaskSwitchContext
+
+processed_source:
+	load_x  t1, pxCurrentTCB			/* Load pxCurrentTCB. */
+	load_x  sp, 0( t1 )				 	/* Read sp from first TCB member. */
+
+	/* Load mret with the address of the next instruction in the task to run next. */
+	load_x t0, 0( sp )
+	csrw mepc, t0
+
+	portasmRESTORE_ADDITIONAL_REGISTERS	/* Defined in freertos_risc_v_chip_specific_extensions.h to restore any registers unique to the RISC-V implementation. */
+
+	/* Load mstatus with the interrupt enable bits used by the task. */
+	load_x  t0, 29 * portWORD_SIZE( sp )
+	csrw mstatus, t0						/* Required for MPIE bit. */
+
+	load_x  x1, 1 * portWORD_SIZE( sp )
+	load_x  x5, 2 * portWORD_SIZE( sp )		/* t0 */
+	load_x  x6, 3 * portWORD_SIZE( sp )		/* t1 */
+	load_x  x7, 4 * portWORD_SIZE( sp )		/* t2 */
+	load_x  x8, 5 * portWORD_SIZE( sp )		/* s0/fp */
+	load_x  x9, 6 * portWORD_SIZE( sp )		/* s1 */
+	load_x  x10, 7 * portWORD_SIZE( sp )	/* a0 */
+	load_x  x11, 8 * portWORD_SIZE( sp )	/* a1 */
+	load_x  x12, 9 * portWORD_SIZE( sp )	/* a2 */
+	load_x  x13, 10 * portWORD_SIZE( sp )	/* a3 */
+	load_x  x14, 11 * portWORD_SIZE( sp )	/* a4 */
+	load_x  x15, 12 * portWORD_SIZE( sp )	/* a5 */
+	load_x  x16, 13 * portWORD_SIZE( sp )	/* a6 */
+	load_x  x17, 14 * portWORD_SIZE( sp )	/* a7 */
+	load_x  x18, 15 * portWORD_SIZE( sp )	/* s2 */
+	load_x  x19, 16 * portWORD_SIZE( sp )	/* s3 */
+	load_x  x20, 17 * portWORD_SIZE( sp )	/* s4 */
+	load_x  x21, 18 * portWORD_SIZE( sp )	/* s5 */
+	load_x  x22, 19 * portWORD_SIZE( sp )	/* s6 */
+	load_x  x23, 20 * portWORD_SIZE( sp )	/* s7 */
+	load_x  x24, 21 * portWORD_SIZE( sp )	/* s8 */
+	load_x  x25, 22 * portWORD_SIZE( sp )	/* s9 */
+	load_x  x26, 23 * portWORD_SIZE( sp )	/* s10 */
+	load_x  x27, 24 * portWORD_SIZE( sp )	/* s11 */
+	load_x  x28, 25 * portWORD_SIZE( sp )	/* t3 */
+	load_x  x29, 26 * portWORD_SIZE( sp )	/* t4 */
+	load_x  x30, 27 * portWORD_SIZE( sp )	/* t5 */
+	load_x  x31, 28 * portWORD_SIZE( sp )	/* t6 */
+	addi sp, sp, portCONTEXT_SIZE
+
+	mret
+	.endfunc
+/*-----------------------------------------------------------*/
+
+.align 8
+.func
+xPortStartFirstTask:
+
+/* if it is an assembly entry code, the SP offset value is determined by the assembly code,
+but the C code is determined by the compiler, so we subtract 512 here as a reservation.
+When entering the interrupt function of C code, the compiler automatically presses the stack
+into the task stack. We can only change the SP value used by the calling function after switching
+the interrupt stack.This problem can be solved by modifying the interrupt to the assembly entry,
+and there is no need to reserve 512 bytes. You only need to switch the interrupt stack at the
+beginning of the interrupt function */
+	lw t0, xISRStackTop
+	addi t0, t0, -512
+    csrw mscratch,t0
+
+	load_x  sp, pxCurrentTCB			/* Load pxCurrentTCB. */
+	load_x  sp, 0( sp )				 	/* Read sp from first TCB member. */
+
+	load_x  x1, 0( sp ) /* Note for starting the scheduler the exception return address is used as the function return address. */
+
+	portasmRESTORE_ADDITIONAL_REGISTERS	/* Defined in freertos_risc_v_chip_specific_extensions.h to restore any registers unique to the RISC-V implementation. */
+
+	load_x  x6, 3 * portWORD_SIZE( sp )		/* t1 */
+	load_x  x7, 4 * portWORD_SIZE( sp )		/* t2 */
+	load_x  x8, 5 * portWORD_SIZE( sp )		/* s0/fp */
+	load_x  x9, 6 * portWORD_SIZE( sp )		/* s1 */
+	load_x  x10, 7 * portWORD_SIZE( sp )	/* a0 */
+	load_x  x11, 8 * portWORD_SIZE( sp )	/* a1 */
+	load_x  x12, 9 * portWORD_SIZE( sp )	/* a2 */
+	load_x  x13, 10 * portWORD_SIZE( sp )	/* a3 */
+	load_x  x14, 11 * portWORD_SIZE( sp )	/* a4 */
+	load_x  x15, 12 * portWORD_SIZE( sp )	/* a5 */
+	load_x  x16, 13 * portWORD_SIZE( sp )	/* a6 */
+	load_x  x17, 14 * portWORD_SIZE( sp )	/* a7 */
+	load_x  x18, 15 * portWORD_SIZE( sp )	/* s2 */
+	load_x  x19, 16 * portWORD_SIZE( sp )	/* s3 */
+	load_x  x20, 17 * portWORD_SIZE( sp )	/* s4 */
+	load_x  x21, 18 * portWORD_SIZE( sp )	/* s5 */
+	load_x  x22, 19 * portWORD_SIZE( sp )	/* s6 */
+	load_x  x23, 20 * portWORD_SIZE( sp )	/* s7 */
+	load_x  x24, 21 * portWORD_SIZE( sp )	/* s8 */
+	load_x  x25, 22 * portWORD_SIZE( sp )	/* s9 */
+	load_x  x26, 23 * portWORD_SIZE( sp )	/* s10 */
+	load_x  x27, 24 * portWORD_SIZE( sp )	/* s11 */
+	load_x  x28, 25 * portWORD_SIZE( sp )	/* t3 */
+	load_x  x29, 26 * portWORD_SIZE( sp )	/* t4 */
+	load_x  x30, 27 * portWORD_SIZE( sp )	/* t5 */
+	load_x  x31, 28 * portWORD_SIZE( sp )	/* t6 */
+
+	load_x  x5, 29 * portWORD_SIZE( sp )	/* Initial mstatus into x5 (t0) */
+	addi x5, x5, 0x08						/* Set MIE bit so the first task starts with interrupts enabled - required as returns with ret not eret. */
+	csrrw  x0, mstatus, x5					/* Interrupts enabled from here! */
+	load_x  x5, 2 * portWORD_SIZE( sp )		/* Initial x5 (t0) value. */
+
+	addi	sp, sp, portCONTEXT_SIZE
+	ret
+	.endfunc
+/*-----------------------------------------------------------*/
+
+/*
+ * Unlike other ports pxPortInitialiseStack() is written in assembly code as it
+ * needs access to the portasmADDITIONAL_CONTEXT_SIZE constant.  The prototype
+ * for the function is as per the other ports:
+ * StackType_t *pxPortInitialiseStack( StackType_t *pxTopOfStack, TaskFunction_t pxCode, void *pvParameters );
+ *
+ * As per the standard RISC-V ABI pxTopcOfStack is passed in in a0, pxCode in
+ * a1, and pvParameters in a2.  The new top of stack is passed out in a0.
+ *
+ * RISC-V maps registers to ABI names as follows (X1 to X31 integer registers
+ * for the 'I' profile, X1 to X15 for the 'E' profile, currently I assumed).
+ *
+ * Register		ABI Name	Description						Saver
+ * x0			zero		Hard-wired zero					-
+ * x1			ra			Return address					Caller
+ * x2			sp			Stack pointer					Callee
+ * x3			gp			Global pointer					-
+ * x4			tp			Thread pointer					-
+ * x5-7			t0-2		Temporaries						Caller
+ * x8			s0/fp		Saved register/Frame pointer	Callee
+ * x9			s1			Saved register					Callee
+ * x10-11		a0-1		Function Arguments/return values Caller
+ * x12-17		a2-7		Function arguments				Caller
+ * x18-27		s2-11		Saved registers					Callee
+ * x28-31		t3-6		Temporaries						Caller
+ *
+ * The RISC-V context is saved t FreeRTOS tasks in the following stack frame,
+ * where the global and thread pointers are currently assumed to be constant so
+ * are not saved:
+ *
+ * mstatus
+ * x31
+ * x30
+ * x29
+ * x28
+ * x27
+ * x26
+ * x25
+ * x24
+ * x23
+ * x22
+ * x21
+ * x20
+ * x19
+ * x18
+ * x17
+ * x16
+ * x15
+ * x14
+ * x13
+ * x12
+ * x11
+ * pvParameters
+ * x9
+ * x8
+ * x7
+ * x6
+ * x5
+ * portTASK_RETURN_ADDRESS
+ * [chip specific registers go here]
+ * pxCode
+ */
+.align 8
+.func
+pxPortInitialiseStack:
+
+	csrr t0, mstatus					/* Obtain current mstatus value. */
+	andi t0, t0, ~0x8					/* Ensure interrupts are disabled when the stack is restored within an ISR.  Required when a task is created after the schedulre has been started, otherwise interrupts would be disabled anyway. */
+	addi t1, x0, 0x788					/* Generate the value 0x7880, which are the MPIE, MPP and FS bits to set in mstatus. */
+	slli t1, t1, 4
+	or t0, t0, t1						/* Set MPIE and MPP bits in mstatus value. */
+
+	addi a0, a0, -portWORD_SIZE
+	store_x t0, 0(a0)					/* mstatus onto the stack. */
+	addi a0, a0, -(22 * portWORD_SIZE)	/* Space for registers x11-x31. */
+	store_x a2, 0(a0)					/* Task parameters (pvParameters parameter) goes into register X10/a0 on the stack. */
+	addi a0, a0, -(6 * portWORD_SIZE)	/* Space for registers x5-x9. */
+	store_x x0, 0(a0)					/* Return address onto the stack, could be portTASK_RETURN_ADDRESS */
+	addi t0, x0, portasmADDITIONAL_CONTEXT_SIZE /* The number of chip specific additional registers. */
+chip_specific_stack_frame:				/* First add any chip specific registers to the stack frame being created. */
+	beq t0, x0, 1f						/* No more chip specific registers to save. */
+	addi a0, a0, -portWORD_SIZE			/* Make space for chip specific register. */
+	store_x x0, 0(a0)					/* Give the chip specific register an initial value of zero. */
+	addi t0, t0, -1						/* Decrement the count of chip specific registers remaining. */
+	j chip_specific_stack_frame			/* Until no more chip specific registers. */
+1:
+	addi a0, a0, -portWORD_SIZE
+	store_x a1, 0(a0)					/* mret value (pxCode parameter) onto the stack. */
+	ret
+	.endfunc
+
+

prj/TCPClient/FreeRTOS/portable/GCC/RISC-V/portmacro.h

@@ -0,0 +1,194 @@
+/*
+ * FreeRTOS Kernel V10.4.6
+ * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * https://www.FreeRTOS.org
+ * https://github.com/FreeRTOS
+ *
+ */
+
+
+#ifndef PORTMACRO_H
+#define PORTMACRO_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*-----------------------------------------------------------
+ * Port specific definitions.
+ *
+ * The settings in this file configure FreeRTOS correctly for the
+ * given hardware and compiler.
+ *
+ * These settings should not be altered.
+ *-----------------------------------------------------------
+ */
+
+/* Type definitions. */
+#if __riscv_xlen == 64
+	#define portSTACK_TYPE			uint64_t
+	#define portBASE_TYPE			int64_t
+	#define portUBASE_TYPE			uint64_t
+	#define portMAX_DELAY 			( TickType_t ) 0xffffffffffffffffUL
+	#define portPOINTER_SIZE_TYPE 	uint64_t
+#elif __riscv_xlen == 32
+	#define portSTACK_TYPE	uint32_t
+	#define portBASE_TYPE	int32_t
+	#define portUBASE_TYPE	uint32_t
+	#define portMAX_DELAY ( TickType_t ) 0xffffffffUL
+#else
+	#error Assembler did not define __riscv_xlen
+#endif
+
+
+typedef portSTACK_TYPE StackType_t;
+typedef portBASE_TYPE BaseType_t;
+typedef portUBASE_TYPE UBaseType_t;
+typedef portUBASE_TYPE TickType_t;
+
+/* Legacy type definitions. */
+#define portCHAR		char
+#define portFLOAT		float
+#define portDOUBLE		double
+#define portLONG		long
+#define portSHORT		short
+
+/* 32-bit tick type on a 32-bit architecture, so reads of the tick count do
+not need to be guarded with a critical section. */
+#define portTICK_TYPE_IS_ATOMIC 1
+/*-----------------------------------------------------------*/
+
+/* Architecture specifics. */
+#define portSTACK_GROWTH			( -1 )
+#define portTICK_PERIOD_MS			( ( TickType_t ) 1000 / configTICK_RATE_HZ )
+#ifdef __riscv64
+	#error This is the RV32 port that has not yet been adapted for 64.
+	#define portBYTE_ALIGNMENT			16
+#else
+	#define portBYTE_ALIGNMENT			16
+#endif
+/*-----------------------------------------------------------*/
+
+
+/* Scheduler utilities. */
+extern void vTaskSwitchContext( void );
+#define portYIELD()   NVIC_SetPendingIRQ(Software_IRQn)
+#define portEND_SWITCHING_ISR( xSwitchRequired ) do { if( xSwitchRequired ) portYIELD(); } while( 0 )
+#define portYIELD_FROM_ISR( x ) portEND_SWITCHING_ISR( x )
+/*-----------------------------------------------------------*/
+
+
+/* Critical section management. */
+extern void vPortEnterCritical( void );
+extern void vPortExitCritical( void );
+extern portUBASE_TYPE xPortSetInterruptMask(void);
+extern void vPortClearInterruptMask(portUBASE_TYPE uvalue);
+
+#define portSET_INTERRUPT_MASK_FROM_ISR()  xPortSetInterruptMask()
+#define portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedStatusValue )  vPortClearInterruptMask(uxSavedStatusValue)
+#define portDISABLE_INTERRUPTS()	__asm volatile( "csrw mstatus,%0" ::"r"(0x7800) )
+#define portENABLE_INTERRUPTS()		__asm volatile( "csrw mstatus,%0" ::"r"(0x7888) )
+#define portENTER_CRITICAL()	vPortEnterCritical()
+#define portEXIT_CRITICAL()		vPortExitCritical()
+/*-----------------------------------------------------------*/
+
+/* switch interrupt sp, sp is saved at first task switch. */
+
+#define GET_INT_SP()   __asm volatile("csrrw sp,mscratch,sp")
+#define FREE_INT_SP()  __asm volatile("csrrw sp,mscratch,sp")
+/*-------------------------------------------------------------*/
+
+
+/* Architecture specific optimisations. */
+#ifndef configUSE_PORT_OPTIMISED_TASK_SELECTION
+	#define configUSE_PORT_OPTIMISED_TASK_SELECTION 1
+#endif
+
+#if( configUSE_PORT_OPTIMISED_TASK_SELECTION == 1 )
+
+	/* Check the configuration. */
+	#if( configMAX_PRIORITIES > 32 )
+		#error configUSE_PORT_OPTIMISED_TASK_SELECTION can only be set to 1 when configMAX_PRIORITIES is less than or equal to 32.  It is very rare that a system requires more than 10 to 15 difference priorities as tasks that share a priority will time slice.
+	#endif
+
+	/* Store/clear the ready priorities in a bit map. */
+	#define portRECORD_READY_PRIORITY( uxPriority, uxReadyPriorities ) ( uxReadyPriorities ) |= ( 1UL << ( uxPriority ) )
+	#define portRESET_READY_PRIORITY( uxPriority, uxReadyPriorities ) ( uxReadyPriorities ) &= ~( 1UL << ( uxPriority ) )
+
+	/*-----------------------------------------------------------*/
+
+	#define portGET_HIGHEST_PRIORITY( uxTopPriority, uxReadyPriorities ) uxTopPriority = ( 31UL - __builtin_clz( uxReadyPriorities ) )
+
+#endif /* configUSE_PORT_OPTIMISED_TASK_SELECTION */
+
+
+/*-----------------------------------------------------------*/
+
+/* Task function macros as described on the FreeRTOS.org WEB site.  These are
+not necessary for to use this port.  They are defined so the common demo files
+(which build with all the ports) will build. */
+#define portTASK_FUNCTION_PROTO( vFunction, pvParameters ) void vFunction( void *pvParameters )
+#define portTASK_FUNCTION( vFunction, pvParameters ) void vFunction( void *pvParameters )
+
+/*-----------------------------------------------------------*/
+
+#define portNOP() __asm volatile 	( " nop " )
+
+#define portINLINE	__inline
+
+#ifndef portFORCE_INLINE
+	#define portFORCE_INLINE inline __attribute__(( always_inline))
+#endif
+
+#define portMEMORY_BARRIER() __asm volatile( "" ::: "memory" )
+/*-----------------------------------------------------------*/
+
+
+/* configCLINT_BASE_ADDRESS is a legacy definition that was replaced by the
+configMTIME_BASE_ADDRESS and configMTIMECMP_BASE_ADDRESS definitions.  For
+backward compatibility derive the newer definitions from the old if the old
+definition is found. */
+#if defined( configCLINT_BASE_ADDRESS ) && !defined( configMTIME_BASE_ADDRESS ) && ( configCLINT_BASE_ADDRESS == 0 )
+	/* Legacy case where configCLINT_BASE_ADDRESS was defined as 0 to indicate
+	there was no CLINT.  Equivalent now is to set the MTIME and MTIMECMP
+	addresses to 0. */
+	#define configMTIME_BASE_ADDRESS 	( 0 )
+	#define configMTIMECMP_BASE_ADDRESS ( 0 )
+#elif defined( configCLINT_BASE_ADDRESS ) && !defined( configMTIME_BASE_ADDRESS )
+	/* Legacy case where configCLINT_BASE_ADDRESS was set to the base address of
+	the CLINT.  Equivalent now is to derive the MTIME and MTIMECMP addresses
+	from the CLINT address. */
+	#define configMTIME_BASE_ADDRESS 	( ( configCLINT_BASE_ADDRESS ) + 0xBFF8UL )
+	#define configMTIMECMP_BASE_ADDRESS ( ( configCLINT_BASE_ADDRESS ) + 0x4000UL )
+#elif !defined( configMTIME_BASE_ADDRESS ) || !defined( configMTIMECMP_BASE_ADDRESS )
+	#error configMTIME_BASE_ADDRESS and configMTIMECMP_BASE_ADDRESS must be defined in FreeRTOSConfig.h.  Set them to zero if there is no MTIME (machine time) clock.  See https://www.FreeRTOS.org/Using-FreeRTOS-on-RISC-V.html
+#endif
+
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* PORTMACRO_H */
+

prj/TCPClient/FreeRTOS/portable/GCC/RISC-V/readme.txt

@@ -0,0 +1,23 @@
+/*
+ * The FreeRTOS kernel's RISC-V port is split between the the code that is
+ * common across all currently supported RISC-V chips (implementations of the
+ * RISC-V ISA), and code that tailors the port to a specific RISC-V chip:
+ *
+ * + FreeRTOS\Source\portable\GCC\RISC-V-RV32\portASM.S contains the code that
+ *   is common to all currently supported RISC-V chips.  There is only one
+ *   portASM.S file because the same file is built for all RISC-V target chips.
+ *
+ * + Header files called freertos_risc_v_chip_specific_extensions.h contain the
+ *   code that tailors the FreeRTOS kernel's RISC-V port to a specific RISC-V
+ *   chip.  There are multiple freertos_risc_v_chip_specific_extensions.h files
+ *   as there are multiple RISC-V chip implementations.
+ *
+ * !!!NOTE!!!
+ * TAKE CARE TO INCLUDE THE CORRECT freertos_risc_v_chip_specific_extensions.h
+ * HEADER FILE FOR THE CHIP IN USE.  This is done using the assembler's (not the
+ * compiler's!) include path.  For example, if the chip in use includes a core
+ * local interrupter (CLINT) and does not include any chip specific register
+ * extensions then add the path below to the assembler's include path:
+ * FreeRTOS\Source\portable\GCC\RISC-V-RV32\chip_specific_extensions\RV32I_CLINT_no_extensions
+ *
+ */

prj/TCPClient/FreeRTOS/portable/MemMang/heap_4.c

@@ -0,0 +1,504 @@
+/*
+ * FreeRTOS Kernel V10.4.6
+ * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * https://www.FreeRTOS.org
+ * https://github.com/FreeRTOS
+ *
+ */
+
+/*
+ * A sample implementation of pvPortMalloc() and vPortFree() that combines
+ * (coalescences) adjacent memory blocks as they are freed, and in so doing
+ * limits memory fragmentation.
+ *
+ * See heap_1.c, heap_2.c and heap_3.c for alternative implementations, and the
+ * memory management pages of https://www.FreeRTOS.org for more information.
+ */
+#include <stdlib.h>
+
+/* Defining MPU_WRAPPERS_INCLUDED_FROM_API_FILE prevents task.h from redefining
+ * all the API functions to use the MPU wrappers.  That should only be done when
+ * task.h is included from an application file. */
+#define MPU_WRAPPERS_INCLUDED_FROM_API_FILE
+
+#include "FreeRTOS.h"
+#include "task.h"
+
+#undef MPU_WRAPPERS_INCLUDED_FROM_API_FILE
+
+#if ( configSUPPORT_DYNAMIC_ALLOCATION == 0 )
+    #error This file must not be used if configSUPPORT_DYNAMIC_ALLOCATION is 0
+#endif
+
+/* Block sizes must not get too small. */
+#define heapMINIMUM_BLOCK_SIZE    ( ( size_t ) ( xHeapStructSize << 1 ) )
+
+/* Assumes 8bit bytes! */
+#define heapBITS_PER_BYTE         ( ( size_t ) 8 )
+
+/* Allocate the memory for the heap. */
+#if ( configAPPLICATION_ALLOCATED_HEAP == 1 )
+
+/* The application writer has already defined the array used for the RTOS
+* heap - probably so it can be placed in a special segment or address. */
+    extern uint8_t ucHeap[ configTOTAL_HEAP_SIZE ];
+#else
+    PRIVILEGED_DATA static uint8_t ucHeap[ configTOTAL_HEAP_SIZE ];
+#endif /* configAPPLICATION_ALLOCATED_HEAP */
+
+/* Define the linked list structure.  This is used to link free blocks in order
+ * of their memory address. */
+typedef struct A_BLOCK_LINK
+{
+    struct A_BLOCK_LINK * pxNextFreeBlock; /*<< The next free block in the list. */
+    size_t xBlockSize;                     /*<< The size of the free block. */
+} BlockLink_t;
+
+/*-----------------------------------------------------------*/
+
+/*
+ * Inserts a block of memory that is being freed into the correct position in
+ * the list of free memory blocks.  The block being freed will be merged with
+ * the block in front it and/or the block behind it if the memory blocks are
+ * adjacent to each other.
+ */
+static void prvInsertBlockIntoFreeList( BlockLink_t * pxBlockToInsert ) PRIVILEGED_FUNCTION;
+
+/*
+ * Called automatically to setup the required heap structures the first time
+ * pvPortMalloc() is called.
+ */
+static void prvHeapInit( void ) PRIVILEGED_FUNCTION;
+
+/*-----------------------------------------------------------*/
+
+/* The size of the structure placed at the beginning of each allocated memory
+ * block must by correctly byte aligned. */
+static const size_t xHeapStructSize = ( sizeof( BlockLink_t ) + ( ( size_t ) ( portBYTE_ALIGNMENT - 1 ) ) ) & ~( ( size_t ) portBYTE_ALIGNMENT_MASK );
+
+/* Create a couple of list links to mark the start and end of the list. */
+PRIVILEGED_DATA static BlockLink_t xStart, * pxEnd = NULL;
+
+/* Keeps track of the number of calls to allocate and free memory as well as the
+ * number of free bytes remaining, but says nothing about fragmentation. */
+PRIVILEGED_DATA static size_t xFreeBytesRemaining = 0U;
+PRIVILEGED_DATA static size_t xMinimumEverFreeBytesRemaining = 0U;
+PRIVILEGED_DATA static size_t xNumberOfSuccessfulAllocations = 0;
+PRIVILEGED_DATA static size_t xNumberOfSuccessfulFrees = 0;
+
+/* Gets set to the top bit of an size_t type.  When this bit in the xBlockSize
+ * member of an BlockLink_t structure is set then the block belongs to the
+ * application.  When the bit is free the block is still part of the free heap
+ * space. */
+PRIVILEGED_DATA static size_t xBlockAllocatedBit = 0;
+
+/*-----------------------------------------------------------*/
+
+void * pvPortMalloc( size_t xWantedSize )
+{
+    BlockLink_t * pxBlock, * pxPreviousBlock, * pxNewBlockLink;
+    void * pvReturn = NULL;
+
+    vTaskSuspendAll();
+    {
+        /* If this is the first call to malloc then the heap will require
+         * initialisation to setup the list of free blocks. */
+        if( pxEnd == NULL )
+        {
+            prvHeapInit();
+        }
+        else
+        {
+            mtCOVERAGE_TEST_MARKER();
+        }
+
+        /* Check the requested block size is not so large that the top bit is
+         * set.  The top bit of the block size member of the BlockLink_t structure
+         * is used to determine who owns the block - the application or the
+         * kernel, so it must be free. */
+        if( ( xWantedSize & xBlockAllocatedBit ) == 0 )
+        {
+            /* The wanted size must be increased so it can contain a BlockLink_t
+             * structure in addition to the requested amount of bytes. */
+            if( ( xWantedSize > 0 ) &&
+                ( ( xWantedSize + xHeapStructSize ) >  xWantedSize ) ) /* Overflow check */
+            {
+                xWantedSize += xHeapStructSize;
+
+                /* Ensure that blocks are always aligned. */
+                if( ( xWantedSize & portBYTE_ALIGNMENT_MASK ) != 0x00 )
+                {
+                    /* Byte alignment required. Check for overflow. */
+                    if( ( xWantedSize + ( portBYTE_ALIGNMENT - ( xWantedSize & portBYTE_ALIGNMENT_MASK ) ) )
+                            > xWantedSize )
+                    {
+                        xWantedSize += ( portBYTE_ALIGNMENT - ( xWantedSize & portBYTE_ALIGNMENT_MASK ) );
+                        configASSERT( ( xWantedSize & portBYTE_ALIGNMENT_MASK ) == 0 );
+                    }
+                    else
+                    {
+                        xWantedSize = 0;
+                    }
+                }
+                else
+                {
+                    mtCOVERAGE_TEST_MARKER();
+                }
+            }
+            else
+            {
+                xWantedSize = 0;
+            }
+
+            if( ( xWantedSize > 0 ) && ( xWantedSize <= xFreeBytesRemaining ) )
+            {
+                /* Traverse the list from the start (lowest address) block until
+                 * one of adequate size is found. */
+                pxPreviousBlock = &xStart;
+                pxBlock = xStart.pxNextFreeBlock;
+
+                while( ( pxBlock->xBlockSize < xWantedSize ) && ( pxBlock->pxNextFreeBlock != NULL ) )
+                {
+                    pxPreviousBlock = pxBlock;
+                    pxBlock = pxBlock->pxNextFreeBlock;
+                }
+
+                /* If the end marker was reached then a block of adequate size
+                 * was not found. */
+                if( pxBlock != pxEnd )
+                {
+                    /* Return the memory space pointed to - jumping over the
+                     * BlockLink_t structure at its start. */
+                    pvReturn = ( void * ) ( ( ( uint8_t * ) pxPreviousBlock->pxNextFreeBlock ) + xHeapStructSize );
+
+                    /* This block is being returned for use so must be taken out
+                     * of the list of free blocks. */
+                    pxPreviousBlock->pxNextFreeBlock = pxBlock->pxNextFreeBlock;
+
+                    /* If the block is larger than required it can be split into
+                     * two. */
+                    if( ( pxBlock->xBlockSize - xWantedSize ) > heapMINIMUM_BLOCK_SIZE )
+                    {
+                        /* This block is to be split into two.  Create a new
+                         * block following the number of bytes requested. The void
+                         * cast is used to prevent byte alignment warnings from the
+                         * compiler. */
+                        pxNewBlockLink = ( void * ) ( ( ( uint8_t * ) pxBlock ) + xWantedSize );
+                        configASSERT( ( ( ( size_t ) pxNewBlockLink ) & portBYTE_ALIGNMENT_MASK ) == 0 );
+
+                        /* Calculate the sizes of two blocks split from the
+                         * single block. */
+                        pxNewBlockLink->xBlockSize = pxBlock->xBlockSize - xWantedSize;
+                        pxBlock->xBlockSize = xWantedSize;
+
+                        /* Insert the new block into the list of free blocks. */
+                        prvInsertBlockIntoFreeList( pxNewBlockLink );
+                    }
+                    else
+                    {
+                        mtCOVERAGE_TEST_MARKER();
+                    }
+
+                    xFreeBytesRemaining -= pxBlock->xBlockSize;
+
+                    if( xFreeBytesRemaining < xMinimumEverFreeBytesRemaining )
+                    {
+                        xMinimumEverFreeBytesRemaining = xFreeBytesRemaining;
+                    }
+                    else
+                    {
+                        mtCOVERAGE_TEST_MARKER();
+                    }
+
+                    /* The block is being returned - it is allocated and owned
+                     * by the application and has no "next" block. */
+                    pxBlock->xBlockSize |= xBlockAllocatedBit;
+                    pxBlock->pxNextFreeBlock = NULL;
+                    xNumberOfSuccessfulAllocations++;
+                }
+                else
+                {
+                    mtCOVERAGE_TEST_MARKER();
+                }
+            }
+            else
+            {
+                mtCOVERAGE_TEST_MARKER();
+            }
+        }
+        else
+        {
+            mtCOVERAGE_TEST_MARKER();
+        }
+
+        traceMALLOC( pvReturn, xWantedSize );
+    }
+    ( void ) xTaskResumeAll();
+
+    #if ( configUSE_MALLOC_FAILED_HOOK == 1 )
+        {
+            if( pvReturn == NULL )
+            {
+                extern void vApplicationMallocFailedHook( void );
+                vApplicationMallocFailedHook();
+            }
+            else
+            {
+                mtCOVERAGE_TEST_MARKER();
+            }
+        }
+    #endif /* if ( configUSE_MALLOC_FAILED_HOOK == 1 ) */
+
+    configASSERT( ( ( ( size_t ) pvReturn ) & ( size_t ) portBYTE_ALIGNMENT_MASK ) == 0 );
+    return pvReturn;
+}
+/*-----------------------------------------------------------*/
+
+void vPortFree( void * pv )
+{
+    uint8_t * puc = ( uint8_t * ) pv;
+    BlockLink_t * pxLink;
+
+    if( pv != NULL )
+    {
+        /* The memory being freed will have an BlockLink_t structure immediately
+         * before it. */
+        puc -= xHeapStructSize;
+
+        /* This casting is to keep the compiler from issuing warnings. */
+        pxLink = ( void * ) puc;
+
+        /* Check the block is actually allocated. */
+        configASSERT( ( pxLink->xBlockSize & xBlockAllocatedBit ) != 0 );
+        configASSERT( pxLink->pxNextFreeBlock == NULL );
+
+        if( ( pxLink->xBlockSize & xBlockAllocatedBit ) != 0 )
+        {
+            if( pxLink->pxNextFreeBlock == NULL )
+            {
+                /* The block is being returned to the heap - it is no longer
+                 * allocated. */
+                pxLink->xBlockSize &= ~xBlockAllocatedBit;
+
+                vTaskSuspendAll();
+                {
+                    /* Add this block to the list of free blocks. */
+                    xFreeBytesRemaining += pxLink->xBlockSize;
+                    traceFREE( pv, pxLink->xBlockSize );
+                    prvInsertBlockIntoFreeList( ( ( BlockLink_t * ) pxLink ) );
+                    xNumberOfSuccessfulFrees++;
+                }
+                ( void ) xTaskResumeAll();
+            }
+            else
+            {
+                mtCOVERAGE_TEST_MARKER();
+            }
+        }
+        else
+        {
+            mtCOVERAGE_TEST_MARKER();
+        }
+    }
+}
+/*-----------------------------------------------------------*/
+
+size_t xPortGetFreeHeapSize( void )
+{
+    return xFreeBytesRemaining;
+}
+/*-----------------------------------------------------------*/
+
+size_t xPortGetMinimumEverFreeHeapSize( void )
+{
+    return xMinimumEverFreeBytesRemaining;
+}
+/*-----------------------------------------------------------*/
+
+void vPortInitialiseBlocks( void )
+{
+    /* This just exists to keep the linker quiet. */
+}
+/*-----------------------------------------------------------*/
+
+static void prvHeapInit( void ) /* PRIVILEGED_FUNCTION */
+{
+    BlockLink_t * pxFirstFreeBlock;
+    uint8_t * pucAlignedHeap;
+    size_t uxAddress;
+    size_t xTotalHeapSize = configTOTAL_HEAP_SIZE;
+
+    /* Ensure the heap starts on a correctly aligned boundary. */
+    uxAddress = ( size_t ) ucHeap;
+
+    if( ( uxAddress & portBYTE_ALIGNMENT_MASK ) != 0 )
+    {
+        uxAddress += ( portBYTE_ALIGNMENT - 1 );
+        uxAddress &= ~( ( size_t ) portBYTE_ALIGNMENT_MASK );
+        xTotalHeapSize -= uxAddress - ( size_t ) ucHeap;
+    }
+
+    pucAlignedHeap = ( uint8_t * ) uxAddress;
+
+    /* xStart is used to hold a pointer to the first item in the list of free
+     * blocks.  The void cast is used to prevent compiler warnings. */
+    xStart.pxNextFreeBlock = ( void * ) pucAlignedHeap;
+    xStart.xBlockSize = ( size_t ) 0;
+
+    /* pxEnd is used to mark the end of the list of free blocks and is inserted
+     * at the end of the heap space. */
+    uxAddress = ( ( size_t ) pucAlignedHeap ) + xTotalHeapSize;
+    uxAddress -= xHeapStructSize;
+    uxAddress &= ~( ( size_t ) portBYTE_ALIGNMENT_MASK );
+    pxEnd = ( void * ) uxAddress;
+    pxEnd->xBlockSize = 0;
+    pxEnd->pxNextFreeBlock = NULL;
+
+    /* To start with there is a single free block that is sized to take up the
+     * entire heap space, minus the space taken by pxEnd. */
+    pxFirstFreeBlock = ( void * ) pucAlignedHeap;
+    pxFirstFreeBlock->xBlockSize = uxAddress - ( size_t ) pxFirstFreeBlock;
+    pxFirstFreeBlock->pxNextFreeBlock = pxEnd;
+
+    /* Only one block exists - and it covers the entire usable heap space. */
+    xMinimumEverFreeBytesRemaining = pxFirstFreeBlock->xBlockSize;
+    xFreeBytesRemaining = pxFirstFreeBlock->xBlockSize;
+
+    /* Work out the position of the top bit in a size_t variable. */
+    xBlockAllocatedBit = ( ( size_t ) 1 ) << ( ( sizeof( size_t ) * heapBITS_PER_BYTE ) - 1 );
+}
+/*-----------------------------------------------------------*/
+
+static void prvInsertBlockIntoFreeList( BlockLink_t * pxBlockToInsert ) /* PRIVILEGED_FUNCTION */
+{
+    BlockLink_t * pxIterator;
+    uint8_t * puc;
+
+    /* Iterate through the list until a block is found that has a higher address
+     * than the block being inserted. */
+    for( pxIterator = &xStart; pxIterator->pxNextFreeBlock < pxBlockToInsert; pxIterator = pxIterator->pxNextFreeBlock )
+    {
+        /* Nothing to do here, just iterate to the right position. */
+    }
+
+    /* Do the block being inserted, and the block it is being inserted after
+     * make a contiguous block of memory? */
+    puc = ( uint8_t * ) pxIterator;
+
+    if( ( puc + pxIterator->xBlockSize ) == ( uint8_t * ) pxBlockToInsert )
+    {
+        pxIterator->xBlockSize += pxBlockToInsert->xBlockSize;
+        pxBlockToInsert = pxIterator;
+    }
+    else
+    {
+        mtCOVERAGE_TEST_MARKER();
+    }
+
+    /* Do the block being inserted, and the block it is being inserted before
+     * make a contiguous block of memory? */
+    puc = ( uint8_t * ) pxBlockToInsert;
+
+    if( ( puc + pxBlockToInsert->xBlockSize ) == ( uint8_t * ) pxIterator->pxNextFreeBlock )
+    {
+        if( pxIterator->pxNextFreeBlock != pxEnd )
+        {
+            /* Form one big block from the two blocks. */
+            pxBlockToInsert->xBlockSize += pxIterator->pxNextFreeBlock->xBlockSize;
+            pxBlockToInsert->pxNextFreeBlock = pxIterator->pxNextFreeBlock->pxNextFreeBlock;
+        }
+        else
+        {
+            pxBlockToInsert->pxNextFreeBlock = pxEnd;
+        }
+    }
+    else
+    {
+        pxBlockToInsert->pxNextFreeBlock = pxIterator->pxNextFreeBlock;
+    }
+
+    /* If the block being inserted plugged a gab, so was merged with the block
+     * before and the block after, then it's pxNextFreeBlock pointer will have
+     * already been set, and should not be set here as that would make it point
+     * to itself. */
+    if( pxIterator != pxBlockToInsert )
+    {
+        pxIterator->pxNextFreeBlock = pxBlockToInsert;
+    }
+    else
+    {
+        mtCOVERAGE_TEST_MARKER();
+    }
+}
+/*-----------------------------------------------------------*/
+
+void vPortGetHeapStats( HeapStats_t * pxHeapStats )
+{
+    BlockLink_t * pxBlock;
+    size_t xBlocks = 0, xMaxSize = 0, xMinSize = portMAX_DELAY; /* portMAX_DELAY used as a portable way of getting the maximum value. */
+
+    vTaskSuspendAll();
+    {
+        pxBlock = xStart.pxNextFreeBlock;
+
+        /* pxBlock will be NULL if the heap has not been initialised.  The heap
+         * is initialised automatically when the first allocation is made. */
+        if( pxBlock != NULL )
+        {
+            do
+            {
+                /* Increment the number of blocks and record the largest block seen
+                 * so far. */
+                xBlocks++;
+
+                if( pxBlock->xBlockSize > xMaxSize )
+                {
+                    xMaxSize = pxBlock->xBlockSize;
+                }
+
+                if( pxBlock->xBlockSize < xMinSize )
+                {
+                    xMinSize = pxBlock->xBlockSize;
+                }
+
+                /* Move to the next block in the chain until the last block is
+                 * reached. */
+                pxBlock = pxBlock->pxNextFreeBlock;
+            } while( pxBlock != pxEnd );
+        }
+    }
+    ( void ) xTaskResumeAll();
+
+    pxHeapStats->xSizeOfLargestFreeBlockInBytes = xMaxSize;
+    pxHeapStats->xSizeOfSmallestFreeBlockInBytes = xMinSize;
+    pxHeapStats->xNumberOfFreeBlocks = xBlocks;
+
+    taskENTER_CRITICAL();
+    {
+        pxHeapStats->xAvailableHeapSpaceInBytes = xFreeBytesRemaining;
+        pxHeapStats->xNumberOfSuccessfulAllocations = xNumberOfSuccessfulAllocations;
+        pxHeapStats->xNumberOfSuccessfulFrees = xNumberOfSuccessfulFrees;
+        pxHeapStats->xMinimumEverFreeBytesRemaining = xMinimumEverFreeBytesRemaining;
+    }
+    taskEXIT_CRITICAL();
+}

prj/TCPClient/Middle/QDXnetworkStack/qdx_port.c

@@ -0,0 +1,404 @@
+/**
+ * @file qdx_port.c
+ * @brief FreeRTOS + WCHNET implementation of the QDX HAL (qdx_port.h)
+ *
+ * Bridges the WCHNET proprietary TCP/IP stack with the blocking/thread-based
+ * interface expected by qdx_tcp_logic.  Uses binary semaphores and ring buffers
+ * to convert WCHNET async callbacks into blocking recv semantics.
+ */
+
+#include "qdx_port.h"
+#include "wchnet.h"
+#include "eth_driver.h"
+
+#include "FreeRTOS.h"
+#include "task.h"
+#include "semphr.h"
+
+#include <string.h>
+#include <stdio.h>
+
+/* ============================================================
+ * Ring-Buffer for receive data
+ * ============================================================ */
+
+#define RX_RING_SIZE  2920  /* == WCHNET_TCP_MSS * 2 */
+
+typedef struct {
+    uint8_t  buf[RX_RING_SIZE];
+    uint16_t head;   /* write index */
+    uint16_t tail;   /* read  index */
+    uint16_t count;  /* bytes stored */
+} RxRingBuf_t;
+
+static void ring_init(RxRingBuf_t *r)
+{
+    r->head  = 0;
+    r->tail  = 0;
+    r->count = 0;
+}
+
+static uint16_t ring_available(const RxRingBuf_t *r)
+{
+    return r->count;
+}
+
+static uint16_t ring_write(RxRingBuf_t *r, const uint8_t *data, uint16_t len)
+{
+    uint16_t free = RX_RING_SIZE - r->count;
+    if (len > free) len = free;
+
+    for (uint16_t i = 0; i < len; i++) {
+        r->buf[r->head] = data[i];
+        r->head = (r->head + 1) % RX_RING_SIZE;
+    }
+    r->count += len;
+    return len;
+}
+
+static uint16_t ring_read(RxRingBuf_t *r, uint8_t *data, uint16_t max_len)
+{
+    uint16_t to_read = (r->count < max_len) ? r->count : max_len;
+
+    for (uint16_t i = 0; i < to_read; i++) {
+        data[i] = r->buf[r->tail];
+        r->tail = (r->tail + 1) % RX_RING_SIZE;
+    }
+    r->count -= to_read;
+    return to_read;
+}
+
+/* ============================================================
+ * Socket Context — maps WCHNET socket ID to qdx_socket_t
+ * ============================================================ */
+
+#define MAX_SOCKETS  2
+
+typedef struct {
+    uint8_t             in_use;
+    uint8_t             wchnet_sock_id;
+    volatile uint8_t    connected;
+    RxRingBuf_t         rx_ring;
+    SemaphoreHandle_t   rx_sem;         /* binary sem: data available */
+    SemaphoreHandle_t   connect_sem;    /* binary sem: connect complete */
+} SocketCtx_t;
+
+static SocketCtx_t g_sock_ctx[MAX_SOCKETS];
+
+/* WCHNET per-socket receive buffers (required by WCHNET_ModifyRecvBuf) */
+extern u8 SocketRecvBuf[WCHNET_MAX_SOCKET_NUM][RECE_BUF_LEN];
+
+/* WCHNET mutex for thread-safe access to WCHNET APIs */
+static SemaphoreHandle_t g_wchnet_mutex;
+
+/* ============================================================
+ * Internal helpers
+ * ============================================================ */
+
+static SocketCtx_t *alloc_sock_ctx(void)
+{
+    for (int i = 0; i < MAX_SOCKETS; i++) {
+        if (!g_sock_ctx[i].in_use) {
+            memset(&g_sock_ctx[i], 0, sizeof(SocketCtx_t));
+            g_sock_ctx[i].in_use = 1;
+            ring_init(&g_sock_ctx[i].rx_ring);
+            g_sock_ctx[i].rx_sem      = xSemaphoreCreateBinary();
+            g_sock_ctx[i].connect_sem  = xSemaphoreCreateBinary();
+            return &g_sock_ctx[i];
+        }
+    }
+    return NULL;
+}
+
+static void free_sock_ctx(SocketCtx_t *ctx)
+{
+    if (!ctx) return;
+    if (ctx->rx_sem)      { vSemaphoreDelete(ctx->rx_sem);      ctx->rx_sem      = NULL; }
+    if (ctx->connect_sem) { vSemaphoreDelete(ctx->connect_sem); ctx->connect_sem = NULL; }
+    ctx->in_use    = 0;
+    ctx->connected = 0;
+}
+
+static SocketCtx_t *find_ctx_by_wchnet_id(uint8_t sockid)
+{
+    for (int i = 0; i < MAX_SOCKETS; i++) {
+        if (g_sock_ctx[i].in_use && g_sock_ctx[i].wchnet_sock_id == sockid)
+            return &g_sock_ctx[i];
+    }
+    return NULL;
+}
+
+/** Parse dotted-decimal IP string to 4-byte array */
+static int parse_ip(const char *ip_str, uint8_t ip[4])
+{
+    unsigned int a, b, c, d;
+    int n = 0, idx = 0;
+    const char *p = ip_str;
+
+    a = b = c = d = 0;
+    uint32_t vals[4] = {0};
+    while (*p && idx < 4) {
+        if (*p >= '0' && *p <= '9') {
+            vals[idx] = vals[idx] * 10 + (*p - '0');
+        } else if (*p == '.') {
+            idx++;
+        } else {
+            return -1;
+        }
+        p++;
+    }
+    if (idx != 3) return -1;
+    for (int i = 0; i < 4; i++) {
+        if (vals[i] > 255) return -1;
+        ip[i] = (uint8_t)vals[i];
+    }
+    return 0;
+}
+
+/* ============================================================
+ * Public: called from WCHNET_HandleSockInt (task context)
+ * ============================================================ */
+
+void qdx_port_sock_recv_notify(uint8_t sockid)
+{
+    SocketCtx_t *ctx = find_ctx_by_wchnet_id(sockid);
+    if (!ctx) return;
+
+    /* Read data from WCHNET into ring buffer */
+    uint8_t tmp[512];
+    uint32_t len;
+    while (1) {
+        len = sizeof(tmp);
+        uint8_t err = WCHNET_SocketRecv(sockid, tmp, &len);
+        if (len == 0) break;
+        ring_write(&ctx->rx_ring, tmp, (uint16_t)len);
+        if (err != WCHNET_ERR_SUCCESS) break;
+    }
+    /* Wake blocking recv thread */
+    xSemaphoreGive(ctx->rx_sem);
+}
+
+void qdx_port_sock_connect_notify(uint8_t sockid)
+{
+    SocketCtx_t *ctx = find_ctx_by_wchnet_id(sockid);
+    if (!ctx) return;
+    ctx->connected = 1;
+    xSemaphoreGive(ctx->connect_sem);
+}
+
+void qdx_port_sock_disconnect_notify(uint8_t sockid)
+{
+    SocketCtx_t *ctx = find_ctx_by_wchnet_id(sockid);
+    if (!ctx) return;
+    ctx->connected = 0;
+    /* Wake recv thread so it can detect disconnect */
+    xSemaphoreGive(ctx->rx_sem);
+}
+
+/* ============================================================
+ * Init — call once before scheduler starts
+ * ============================================================ */
+
+void qdx_port_init(void)
+{
+    memset(g_sock_ctx, 0, sizeof(g_sock_ctx));
+    g_wchnet_mutex = xSemaphoreCreateMutex();
+}
+
+/* ============================================================
+ * Time & Delay
+ * ============================================================ */
+
+uint32_t qdx_port_get_tick_ms(void)
+{
+    return xTaskGetTickCount() * portTICK_PERIOD_MS;
+}
+
+void qdx_port_delay_ms(uint32_t ms)
+{
+    vTaskDelay(pdMS_TO_TICKS(ms));
+}
+
+/* ============================================================
+ * Mutex
+ * ============================================================ */
+
+qdx_mutex_t qdx_port_mutex_create(void)
+{
+    return (qdx_mutex_t)xSemaphoreCreateMutex();
+}
+
+void qdx_port_mutex_lock(qdx_mutex_t mutex)
+{
+    if (mutex)
+        xSemaphoreTake((SemaphoreHandle_t)mutex, portMAX_DELAY);
+}
+
+void qdx_port_mutex_unlock(qdx_mutex_t mutex)
+{
+    if (mutex)
+        xSemaphoreGive((SemaphoreHandle_t)mutex);
+}
+
+void qdx_port_mutex_delete(qdx_mutex_t mutex)
+{
+    if (mutex)
+        vSemaphoreDelete((SemaphoreHandle_t)mutex);
+}
+
+/* ============================================================
+ * Thread
+ * ============================================================ */
+
+int8_t qdx_port_thread_create(const char *name, qdx_thread_entry_t entry,
+                              void *arg, uint32_t stack_size, uint8_t priority)
+{
+    /* stack_size from caller is in bytes; xTaskCreate expects words */
+    uint32_t stack_words = stack_size / sizeof(StackType_t);
+    if (stack_words < configMINIMAL_STACK_SIZE)
+        stack_words = configMINIMAL_STACK_SIZE;
+
+    BaseType_t ret = xTaskCreate((TaskFunction_t)entry, name,
+                                 (uint16_t)stack_words, arg,
+                                 (UBaseType_t)priority, NULL);
+    return (ret == pdPASS) ? 0 : -1;
+}
+
+/* ============================================================
+ * TCP Socket — connect / send / recv / close
+ * ============================================================ */
+
+qdx_socket_t qdx_port_tcp_connect(const char *ip, uint16_t port)
+{
+    uint8_t dest_ip[4];
+    if (parse_ip(ip, dest_ip) != 0) {
+        printf("qdx_port: bad IP \"%s\"\r\n", ip);
+        return NULL;
+    }
+
+    SocketCtx_t *ctx = alloc_sock_ctx();
+    if (!ctx) {
+        printf("qdx_port: no free SocketCtx\r\n");
+        return NULL;
+    }
+
+    SOCK_INF sock_inf;
+    memset(&sock_inf, 0, sizeof(sock_inf));
+    sock_inf.ProtoType = PROTO_TYPE_TCP;
+    sock_inf.SourPort  = 0;  /* let WCHNET assign ephemeral port */
+    sock_inf.DesPort   = port;
+    memcpy(sock_inf.IPAddr, dest_ip, 4);
+
+    uint8_t wchnet_id = 0;
+
+    xSemaphoreTake(g_wchnet_mutex, portMAX_DELAY);
+    uint8_t err = WCHNET_SocketCreat(&wchnet_id, &sock_inf);
+    xSemaphoreGive(g_wchnet_mutex);
+
+    if (err != WCHNET_ERR_SUCCESS) {
+        printf("qdx_port: SocketCreat fail %02X\r\n", err);
+        free_sock_ctx(ctx);
+        return NULL;
+    }
+
+    ctx->wchnet_sock_id = wchnet_id;
+
+    /* Assign WCHNET receive buffer */
+    WCHNET_ModifyRecvBuf(wchnet_id,
+                         (uint32_t)SocketRecvBuf[wchnet_id], RECE_BUF_LEN);
+
+    xSemaphoreTake(g_wchnet_mutex, portMAX_DELAY);
+    err = WCHNET_SocketConnect(wchnet_id);
+    xSemaphoreGive(g_wchnet_mutex);
+
+    if (err != WCHNET_ERR_SUCCESS) {
+        printf("qdx_port: SocketConnect fail %02X\r\n", err);
+        WCHNET_SocketClose(wchnet_id, 0);
+        free_sock_ctx(ctx);
+        return NULL;
+    }
+
+    /* Block until SINT_STAT_CONNECT or 5s timeout */
+    if (xSemaphoreTake(ctx->connect_sem, pdMS_TO_TICKS(5000)) != pdTRUE) {
+        printf("qdx_port: connect timeout\r\n");
+        WCHNET_SocketClose(wchnet_id, 0);
+        free_sock_ctx(ctx);
+        return NULL;
+    }
+
+    if (!ctx->connected) {
+        WCHNET_SocketClose(wchnet_id, 0);
+        free_sock_ctx(ctx);
+        return NULL;
+    }
+
+#if KEEPALIVE_ENABLE
+    WCHNET_SocketSetKeepLive(wchnet_id, ENABLE);
+#endif
+
+    printf("qdx_port: connected sock %d -> %d.%d.%d.%d:%d\r\n",
+           wchnet_id, dest_ip[0], dest_ip[1], dest_ip[2], dest_ip[3], port);
+    return (qdx_socket_t)ctx;
+}
+
+int32_t qdx_port_tcp_send(qdx_socket_t sock, const uint8_t *data, uint32_t len)
+{
+    SocketCtx_t *ctx = (SocketCtx_t *)sock;
+    if (!ctx || !ctx->connected)
+        return -1;
+
+    uint32_t send_len = len;
+
+    xSemaphoreTake(g_wchnet_mutex, portMAX_DELAY);
+    uint8_t err = WCHNET_SocketSend(ctx->wchnet_sock_id, (uint8_t *)data, &send_len);
+    xSemaphoreGive(g_wchnet_mutex);
+
+    if (err != WCHNET_ERR_SUCCESS)
+        return -1;
+
+    return (int32_t)send_len;
+}
+
+int32_t qdx_port_tcp_recv(qdx_socket_t sock, uint8_t *buf, uint32_t max_len)
+{
+    SocketCtx_t *ctx = (SocketCtx_t *)sock;
+    if (!ctx)
+        return -1;
+
+    /* Check ring buffer first */
+    uint16_t got = ring_read(&ctx->rx_ring, buf, (uint16_t)max_len);
+    if (got > 0)
+        return (int32_t)got;
+
+    /* No data — check if disconnected */
+    if (!ctx->connected)
+        return -1;
+
+    /* Block on semaphore up to 100ms */
+    xSemaphoreTake(ctx->rx_sem, pdMS_TO_TICKS(100));
+
+    /* Try again after wake */
+    got = ring_read(&ctx->rx_ring, buf, (uint16_t)max_len);
+    if (got > 0)
+        return (int32_t)got;
+
+    /* Still no data — disconnected? */
+    if (!ctx->connected)
+        return -1;
+
+    return 0;  /* timeout, no data */
+}
+
+void qdx_port_tcp_close(qdx_socket_t sock)
+{
+    SocketCtx_t *ctx = (SocketCtx_t *)sock;
+    if (!ctx) return;
+
+    if (ctx->in_use) {
+        xSemaphoreTake(g_wchnet_mutex, portMAX_DELAY);
+        WCHNET_SocketClose(ctx->wchnet_sock_id, 0);
+        xSemaphoreGive(g_wchnet_mutex);
+    }
+    ring_init(&ctx->rx_ring);
+    free_sock_ctx(ctx);
+}

prj/TCPClient/User/FreeRTOSConfig.h

@@ -0,0 +1,151 @@
+/*
+    FreeRTOS V202112.00
+    All rights reserved
+
+    VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
+
+    This file is part of the FreeRTOS distribution.
+
+    FreeRTOS is free software; you can redistribute it and/or modify it under
+    the terms of the GNU General Public License (version 2) as published by the
+    Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
+
+    ***************************************************************************
+    >>!   NOTE: The modification to the GPL is included to allow you to     !<<
+    >>!   distribute a combined work that includes FreeRTOS without being   !<<
+    >>!   obliged to provide the source code for proprietary components     !<<
+    >>!   outside of the FreeRTOS kernel.                                   !<<
+    ***************************************************************************
+
+    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE.  Full license text is available on the following
+    link: http://www.freertos.org/a00114.html
+
+    ***************************************************************************
+     *                                                                       *
+     *    FreeRTOS provides completely free yet professionally developed,    *
+     *    robust, strictly quality controlled, supported, and cross          *
+     *    platform software that is more than just the market leader, it     *
+     *    is the industry's de facto standard.                               *
+     *                                                                       *
+     *    Help yourself get started quickly while simultaneously helping     *
+     *    to support the FreeRTOS project by purchasing a FreeRTOS           *
+     *    tutorial book, reference manual, or both:                          *
+     *    http://www.FreeRTOS.org/Documentation                              *
+     *                                                                       *
+    ***************************************************************************
+
+    http://www.FreeRTOS.org/FAQHelp.html - Having a problem?  Start by reading
+    the FAQ page "My application does not run, what could be wrong?".  Have you
+    defined configASSERT()?
+
+    http://www.FreeRTOS.org/support - In return for receiving this top quality
+    embedded software for free we request you assist our global community by
+    participating in the support forum.
+
+    http://www.FreeRTOS.org/training - Investing in training allows your team to
+    be as productive as possible as early as possible.  Now you can receive
+    FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
+    Ltd, and the world's leading authority on the world's leading RTOS.
+
+    http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
+    including FreeRTOS+Trace - an indispensable productivity tool, a DOS
+    compatible FAT file system, and our tiny thread aware UDP/IP stack.
+
+    http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
+    Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
+
+    http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
+    Integrity Systems ltd. to sell under the OpenRTOS brand.  Low cost OpenRTOS
+    licenses offer ticketed support, indemnification and commercial middleware.
+
+    http://www.SafeRTOS.com - High Integrity Systems also provide a safety
+    engineered and independently SIL3 certified version for use in safety and
+    mission critical applications that require provable dependability.
+
+    1 tab == 4 spaces!
+*/
+
+
+#ifndef FREERTOS_CONFIG_H
+#define FREERTOS_CONFIG_H
+#include "debug.h"
+
+/*-----------------------------------------------------------
+ * Application specific definitions.
+ *
+ * These definitions should be adjusted for your particular hardware and
+ * application requirements.
+ *
+ * THESE PARAMETERS ARE DESCRIBED WITHIN THE 'CONFIGURATION' SECTION OF THE
+ * FreeRTOS API DOCUMENTATION AVAILABLE ON THE FreeRTOS.org WEB SITE.
+ *
+ * See http://www.freertos.org/a00110.html.
+ *----------------------------------------------------------*/
+
+/* See https://www.freertos.org/Using-FreeRTOS-on-RISC-V.html */
+
+/* don't have MTIME */
+#define configMTIME_BASE_ADDRESS 	 ( 0 )
+#define configMTIMECMP_BASE_ADDRESS  ( 0 )
+
+#define configUSE_PREEMPTION			1
+#define configUSE_IDLE_HOOK				0
+#define configUSE_TICK_HOOK				0
+#define configCPU_CLOCK_HZ				SystemCoreClock
+#define configTICK_RATE_HZ				( ( TickType_t ) 500 )
+#define configMAX_PRIORITIES			( 15 )
+#define configMINIMAL_STACK_SIZE		( ( unsigned short ) 256 ) /* Can be as low as 60 but some of the demo tasks that use this constant require it to be higher. */
+#define configTOTAL_HEAP_SIZE			( ( size_t ) ( 12 * 1024 ) )
+#define configMAX_TASK_NAME_LEN			( 16 )
+#define configUSE_TRACE_FACILITY		0
+#define configUSE_16_BIT_TICKS			0
+#define configIDLE_SHOULD_YIELD			0
+#define configUSE_MUTEXES				1
+#define configQUEUE_REGISTRY_SIZE		8
+#define configCHECK_FOR_STACK_OVERFLOW	0
+#define configUSE_RECURSIVE_MUTEXES		1
+#define configUSE_MALLOC_FAILED_HOOK	0
+#define configUSE_APPLICATION_TASK_TAG	0
+#define configUSE_COUNTING_SEMAPHORES	1
+#define configGENERATE_RUN_TIME_STATS	0
+#define configUSE_PORT_OPTIMISED_TASK_SELECTION 0
+
+/* Co-routine definitions. */
+#define configUSE_CO_ROUTINES 			0
+#define configMAX_CO_ROUTINE_PRIORITIES ( 2 )
+
+/* Software timer definitions. */
+#define configUSE_TIMERS				1
+#define configTIMER_TASK_PRIORITY		( configMAX_PRIORITIES - 1 )
+#define configTIMER_QUEUE_LENGTH		4
+#define configTIMER_TASK_STACK_DEPTH	( configMINIMAL_STACK_SIZE )
+
+
+
+/* Set the following definitions to 1 to include the API function, or zero
+to exclude the API function. */
+#define INCLUDE_vTaskPrioritySet			1
+#define INCLUDE_uxTaskPriorityGet			1
+#define INCLUDE_vTaskDelete					1
+#define INCLUDE_vTaskCleanUpResources		1
+#define INCLUDE_vTaskSuspend				1
+#define INCLUDE_vTaskDelayUntil				1
+#define INCLUDE_vTaskDelay					1
+#define INCLUDE_eTaskGetState				1
+#define INCLUDE_xTimerPendFunctionCall		1
+#define INCLUDE_xTaskAbortDelay				1
+#define INCLUDE_xTaskGetHandle				1
+#define INCLUDE_xSemaphoreGetMutexHolder	1
+
+
+/* Normal assert() semantics without relying on the provision of an assert.h
+header file. */
+#define configASSERT( x ) if( ( x ) == 0 ) { taskDISABLE_INTERRUPTS(); printf("err at line %d of file \"%s\". \r\n ",__LINE__,__FILE__); while(1); }
+
+/* Map to the platform printf function. */
+#define configPRINT_STRING( pcString )  printf( pcString )
+
+
+#endif /* FREERTOS_CONFIG_H */

prj/TCPClient/User/ch32v30x_it.c

@@ -11,6 +11,8 @@
 *******************************************************************************/
 #include "eth_driver.h"
 #include "ch32v30x_it.h"
+#include "FreeRTOS.h"
+#include "task.h"
 
 void NMI_Handler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
 void HardFault_Handler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
@@ -89,8 +91,19 @@ void ETH_IRQHandler(void)
  */
 void TIM2_IRQHandler(void)
 {
-    sys_tick_ms += WCHNETTIMERPERIOD;        /* 累加实际间隔毫秒数 */
+    static uint8_t wchnet_divider = 0;
-    WCHNET_TimeIsr(WCHNETTIMERPERIOD);
+
+    /* 2ms tick for FreeRTOS (configTICK_RATE_HZ = 500) */
+    sys_tick_ms += 2;
+    xPortSysTickHandler();
+
+    /* Software divider: call WCHNET_TimeIsr every 5 ticks = 10ms */
+    if (++wchnet_divider >= 5)
+    {
+        wchnet_divider = 0;
+        WCHNET_TimeIsr(WCHNETTIMERPERIOD);
+    }
+
     TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
 }
 

prj/TCPClient/User/main.c

@@ -6,6 +6,10 @@
 #include "qdx_preprocess.h"
 #include "qdx_tcp_logic.h"
 
+#include "FreeRTOS.h"
+#include "task.h"
+#include "timers.h"
+
 #define MAX_TCP_PAYLOAD_SIZE 10240
 uint8_t g_TxNetBuffer_A_Mem[MAX_TCP_PAYLOAD_SIZE];
 uint8_t g_TxNetBuffer_B_Mem[MAX_TCP_PAYLOAD_SIZE];
@@ -27,15 +31,45 @@ TcpTxBuffer_t g_TxNetBuffer_B = {
 
 void OnConfigUpdate(const ConfigCommon_t *common, const Config2D_t *cfg2d, const Config1D_t *cfg1d)
 {
-    // Update preprocessing thresholds
+    Preprocess_Settings_Change(cfg2d, cfg1d, common);
-    // Preprocess_Settings_Change(...); // Assuming this needs to be implemented or already exists
 }
 
-void OnDetectionResult(uint8_t frameType, uint8_t isOK)
+/* NG output GPIO: PA8 push-pull, active-high when NG detected */
+#define NG_GPIO_PORT   GPIOA
+#define NG_GPIO_PIN    GPIO_Pin_8
+#define NG_GPIO_CLK    RCC_APB2Periph_GPIOA
+#define NG_PULSE_MS    200  /* default NG pulse width */
+
+static TimerHandle_t g_ng_timer;
+
+static void ng_timer_callback(TimerHandle_t xTimer)
 {
-    // If not OK, trigger GPIO NG cylinder
+    (void)xTimer;
-    if (!isOK) {
+    GPIO_ResetBits(NG_GPIO_PORT, NG_GPIO_PIN);
-        // trigger GPIO action
+}
+
+static void NG_GPIO_Init(void)
+{
+    GPIO_InitTypeDef gpio = {0};
+    RCC_APB2PeriphClockCmd(NG_GPIO_CLK, ENABLE);
+    gpio.GPIO_Pin   = NG_GPIO_PIN;
+    gpio.GPIO_Mode  = GPIO_Mode_Out_PP;
+    gpio.GPIO_Speed = GPIO_Speed_2MHz;
+    GPIO_Init(NG_GPIO_PORT, &gpio);
+    GPIO_ResetBits(NG_GPIO_PORT, NG_GPIO_PIN);
+
+    g_ng_timer = xTimerCreate("ng", pdMS_TO_TICKS(NG_PULSE_MS),
+                              pdFALSE, NULL, ng_timer_callback);
+}
+
+void OnDetectionResult(uint32_t frameNumber, uint8_t resultStatus)
+{
+    (void)frameNumber;
+    /* resultStatus: 0 = NG, 1 = OK */
+    if (resultStatus == 0) {
+        GPIO_SetBits(NG_GPIO_PORT, NG_GPIO_PIN);
+        if (g_ng_timer)
+            xTimerStart(g_ng_timer, 0);
     }
 }
 
@@ -50,7 +84,6 @@ u16 desport     = 5512;
 u16 srcport     = 5511;
 
 u8 SocketId;
-u8 socket[WCHNET_MAX_SOCKET_NUM];
 u8 SocketRecvBuf[WCHNET_MAX_SOCKET_NUM][RECE_BUF_LEN];
 
 void mStopIfError(u8 iError)
@@ -63,7 +96,8 @@ void TIM2_Init(void)
 {
     TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure = {0};
     RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
-    TIM_TimeBaseStructure.TIM_Period        = WCHNETTIMERPERIOD * 1000 - 1;
+    /* 2ms period: matches configTICK_RATE_HZ = 500 */
+    TIM_TimeBaseStructure.TIM_Period        = 2000 - 1;
     TIM_TimeBaseStructure.TIM_Prescaler     = SystemCoreClock / 1000000 - 1;
     TIM_TimeBaseStructure.TIM_ClockDivision = 0;
     TIM_TimeBaseStructure.TIM_CounterMode   = TIM_CounterMode_Up;
@@ -78,39 +112,34 @@ void TIM2_Init(void)
 
 
 
+/* qdx_port.c notification hooks */
+extern void qdx_port_sock_recv_notify(uint8_t sockid);
+extern void qdx_port_sock_connect_notify(uint8_t sockid);
+extern void qdx_port_sock_disconnect_notify(uint8_t sockid);
+extern void qdx_port_init(void);
+
+
 void WCHNET_HandleSockInt(u8 socketid, u8 intstat)
 {
-    u8 i;
-
     if (intstat & SINT_STAT_RECV)
     {
-        /* DataLoopback removed, handled in qdx_tcp_logic */
+        qdx_port_sock_recv_notify(socketid);
     }
     if (intstat & SINT_STAT_CONNECT)
     {
-#if KEEPALIVE_ENABLE
-        WCHNET_SocketSetKeepLive(socketid, ENABLE);
-#endif
         WCHNET_ModifyRecvBuf(socketid, (u32)SocketRecvBuf[socketid], RECE_BUF_LEN);
-        for (i = 0; i < WCHNET_MAX_SOCKET_NUM; i++) {
+        qdx_port_sock_connect_notify(socketid);
-            if (socket[i] == 0xff) { socket[i] = socketid; break; }
+        printf("TCP Connected, socket %d\r\n", socketid);
-        }
-        printf("TCP Connect Success, socket id: %d\r\n", socketid);
     }
     if (intstat & SINT_STAT_DISCONNECT)
     {
-        for (i = 0; i < WCHNET_MAX_SOCKET_NUM; i++) {
+        qdx_port_sock_disconnect_notify(socketid);
-            if (socket[i] == socketid) { socket[i] = 0xff; break; }
+        printf("TCP Disconnected, socket %d\r\n", socketid);
-        }
-        printf("TCP Disconnect\r\n");
     }
     if (intstat & SINT_STAT_TIM_OUT)
     {
-        for (i = 0; i < WCHNET_MAX_SOCKET_NUM; i++) {
+        qdx_port_sock_disconnect_notify(socketid);
-            if (socket[i] == socketid) { socket[i] = 0xff; break; }
+        printf("TCP Timeout, socket %d\r\n", socketid);
-        }
-        printf("TCP Timeout\r\n");
-        TcpLogic_Init(MACAddr);
     }
 }
 
@@ -134,6 +163,62 @@ void WCHNET_HandleGlobalInt(void)
     }
 }
 
+/* ============================================================
+ * RTOS Task: WCHNET protocol stack driver (highest priority)
+ * ============================================================ */
+static void task_wchnet_entry(void *pvParameters)
+{
+    (void)pvParameters;
+    while (1)
+    {
+        WCHNET_MainTask();
+        if (WCHNET_QueryGlobalInt())
+            WCHNET_HandleGlobalInt();
+        vTaskDelay(pdMS_TO_TICKS(5));
+    }
+}
+
+/* ============================================================
+ * RTOS Task: Business logic (DVP + preprocess + send)
+ * ============================================================ */
+static void task_business_entry(void *pvParameters)
+{
+    (void)pvParameters;
+    static uint8_t use_buffer_A = 1;
+
+    while (1)
+    {
+        DVP_Task();
+
+        if (Frame_Ready_Flag)
+        {
+            Frame_Ready_Flag = 0;
+
+            RawImageBuffer_t raw_img;
+            raw_img.pData = (uint16_t *)FrameBuffer;
+            raw_img.Width = SENSOR_WIDTH;
+            raw_img.Height = SENSOR_HEIGHT;
+            raw_img.FrameNumber = Ready_Frame_Count;
+
+            if (Preprocess_CheckInternalTrigger2D(&raw_img) == 1)
+            {
+                PreprocessResult_t meta;
+                TcpTxBuffer_t *tx_buf = use_buffer_A ? &g_TxNetBuffer_A : &g_TxNetBuffer_B;
+                use_buffer_A = !use_buffer_A;
+
+                if (Preprocess_Execute(&raw_img, tx_buf, &meta) == 0)
+                {
+                    TcpLogic_BuildAndSendTemperatureFrame(tx_buf, &meta, 1, 1);
+                }
+            }
+        }
+        else
+        {
+            vTaskDelay(pdMS_TO_TICKS(2));
+        }
+    }
+}
+
 int main(void)
 {
     u8 i;
@@ -151,6 +236,7 @@ int main(void)
 
     DVP_Init();
     TIM2_Init();
+    NG_GPIO_Init();
 
     i = ETH_LibInit(IPAddr, GWIPAddr, IPMask, MACAddr);
     mStopIfError(i);
@@ -163,49 +249,18 @@ int main(void)
     }
 #endif
 
-    memset(socket, 0xff, WCHNET_MAX_SOCKET_NUM);
+    qdx_port_init();
-    
+
-    
     Preprocess_Init(SENSOR_WIDTH, SENSOR_HEIGHT);
     TcpLogic_Init(MACAddr, NULL);
     TcpLogic_RegisterConfigCallback(OnConfigUpdate);
     TcpLogic_RegisterDetectionCallback(OnDetectionResult);
     TcpLogic_Start();
 
+    xTaskCreate(task_wchnet_entry, "wchnet", 1024, NULL, 6, NULL);
+    xTaskCreate(task_business_entry, "business", 1024, NULL, 5, NULL);
+    vTaskStartScheduler();
 
-    while (1)
+    /* Should never reach here */
-    {
+    while (1) {}
-        DVP_Task();
-        
-        if (Frame_Ready_Flag)
-        {
-            Frame_Ready_Flag = 0;
-            
-            RawImageBuffer_t raw_img;
-            raw_img.pData = (uint16_t *)FrameBuffer;
-            raw_img.Width = SENSOR_WIDTH;
-            raw_img.Height = SENSOR_HEIGHT;
-            raw_img.FrameNumber = Ready_Frame_Count;
-            
-            if (Preprocess_CheckInternalTrigger2D(&raw_img) == 1)
-            {
-                PreprocessResult_t meta;
-                
-                // Toggle between A and B
-                static uint8_t use_buffer_A = 1;
-                TcpTxBuffer_t *tx_buf = use_buffer_A ? &g_TxNetBuffer_A : &g_TxNetBuffer_B;
-                use_buffer_A = !use_buffer_A;
-                
-                if (Preprocess_Execute(&raw_img, tx_buf, &meta) == 0)
-                {
-                    TcpLogic_BuildAndSendTemperatureFrame(tx_buf, &meta, 1, 1);
-                }
-            }
-        }
-        
-        WCHNET_MainTask();
-        if (WCHNET_QueryGlobalInt())
-            WCHNET_HandleGlobalInt();
-    }
-
 }

prj/TCPClient/User/net_config.h

@@ -24,7 +24,7 @@ extern "C" {
 
 #define WCHNET_NUM_UDP                0  /* The number of UDP connections */
 
-#define WCHNET_NUM_TCP                1  /* Number of TCP connections */
+#define WCHNET_NUM_TCP                2  /* Number of TCP connections (control + data stream) */
 
 #define WCHNET_NUM_TCP_LISTEN         0  /* Number of TCP listening */
 

prj/TCPClient/obj/Debug/subdir.mk

@@ -19,6 +19,6 @@ C_DEPS += \
 
 # Each subdirectory must supply rules for building sources it contributes
 Debug/%.o: ../Debug/%.c
-	@	@	riscv-none-embed-gcc -march=rv32imacxw -mabi=ilp32 -msmall-data-limit=8 -msave-restore -Os -fmessage-length=0 -fsigned-char -ffunction-sections -fdata-sections -fno-common -Wunused -Wuninitialized  -g -I"D:\zj\Project_Ch32v307\prj\TCPClient\NetLib" -I"D:\zj\Project_Ch32v307\prj\TCPClient\Core" -I"D:\zj\Project_Ch32v307\prj\TCPClient\Debug" -I"D:\zj\Project_Ch32v307\prj\TCPClient\Peripheral\inc" -I"D:\zj\Project_Ch32v307\prj\TCPClient\User" -std=gnu99 -MMD -MP -MF"$(@:%.o=%.d)" -MT"$(@)" -c -o "$@" "$<"
+	@	@	riscv-none-embed-gcc -march=rv32imacxw -mabi=ilp32 -msmall-data-limit=8 -msave-restore -Os -fmessage-length=0 -fsigned-char -ffunction-sections -fdata-sections -fno-common -Wunused -Wuninitialized  -g -I"D:\zj\Project_Ch32v307\prj\TCPClient\NetLib" -I"D:\zj\Project_Ch32v307\prj\TCPClient\Core" -I"D:\zj\Project_Ch32v307\prj\TCPClient\Debug" -I"D:\zj\Project_Ch32v307\prj\TCPClient\Peripheral\inc" -I"D:\zj\Project_Ch32v307\prj\TCPClient\User" -I"D:\zj\Project_Ch32v307\prj\TCPClient\FreeRTOS\include" -I"D:\zj\Project_Ch32v307\prj\TCPClient\FreeRTOS\portable\GCC\RISC-V" -I"D:\zj\Project_Ch32v307\prj\TCPClient\FreeRTOS\portable\GCC\RISC-V\chip_specific_extensions\RV32I_PFIC_no_extensions" -std=gnu99 -MMD -MP -MF"$(@:%.o=%.d)" -MT"$(@)" -c -o "$@" "$<"
 	@	@
 

prj/TCPClient/obj/FreeRTOS/subdir.mk

@@ -0,0 +1,57 @@
+################################################################################
+# FreeRTOS kernel sources for TCPClient project
+################################################################################
+
+# Add inputs and outputs from these tool invocations to the build variables 
+C_SRCS += \
+../FreeRTOS/tasks.c \
+../FreeRTOS/queue.c \
+../FreeRTOS/list.c \
+../FreeRTOS/timers.c \
+../FreeRTOS/event_groups.c \
+../FreeRTOS/portable/MemMang/heap_4.c \
+../FreeRTOS/portable/GCC/RISC-V/port.c 
+
+S_UPPER_SRCS += \
+../FreeRTOS/portable/GCC/RISC-V/portASM.S 
+
+OBJS += \
+./FreeRTOS/tasks.o \
+./FreeRTOS/queue.o \
+./FreeRTOS/list.o \
+./FreeRTOS/timers.o \
+./FreeRTOS/event_groups.o \
+./FreeRTOS/portable/MemMang/heap_4.o \
+./FreeRTOS/portable/GCC/RISC-V/port.o \
+./FreeRTOS/portable/GCC/RISC-V/portASM.o 
+
+C_DEPS += \
+./FreeRTOS/tasks.d \
+./FreeRTOS/queue.d \
+./FreeRTOS/list.d \
+./FreeRTOS/timers.d \
+./FreeRTOS/event_groups.d \
+./FreeRTOS/portable/MemMang/heap_4.d \
+./FreeRTOS/portable/GCC/RISC-V/port.d 
+
+S_UPPER_DEPS += \
+./FreeRTOS/portable/GCC/RISC-V/portASM.d 
+
+
+# Each subdirectory must supply rules for building sources it contributes
+FreeRTOS/%.o: ../FreeRTOS/%.c
+	@	@	riscv-none-embed-gcc -march=rv32imacxw -mabi=ilp32 -msmall-data-limit=8 -msave-restore -Os -fmessage-length=0 -fsigned-char -ffunction-sections -fdata-sections -fno-common -Wunused -Wuninitialized  -g -I"D:\zj\Project_Ch32v307\prj\TCPClient\NetLib" -I"D:\zj\Project_Ch32v307\prj\TCPClient\Core" -I"D:\zj\Project_Ch32v307\prj\TCPClient\Debug" -I"D:\zj\Project_Ch32v307\prj\TCPClient\Peripheral\inc" -I"D:\zj\Project_Ch32v307\prj\TCPClient\User" -I"D:\zj\Project_Ch32v307\prj\TCPClient\FreeRTOS\include" -I"D:\zj\Project_Ch32v307\prj\TCPClient\FreeRTOS\portable\GCC\RISC-V" -I"D:\zj\Project_Ch32v307\prj\TCPClient\FreeRTOS\portable\GCC\RISC-V\chip_specific_extensions\RV32I_PFIC_no_extensions" -std=gnu99 -MMD -MP -MF"$(@:%.o=%.d)" -MT"$(@)" -c -o "$@" "$<"
+	@	@
+
+FreeRTOS/portable/MemMang/%.o: ../FreeRTOS/portable/MemMang/%.c
+	@	@	riscv-none-embed-gcc -march=rv32imacxw -mabi=ilp32 -msmall-data-limit=8 -msave-restore -Os -fmessage-length=0 -fsigned-char -ffunction-sections -fdata-sections -fno-common -Wunused -Wuninitialized  -g -I"D:\zj\Project_Ch32v307\prj\TCPClient\NetLib" -I"D:\zj\Project_Ch32v307\prj\TCPClient\Core" -I"D:\zj\Project_Ch32v307\prj\TCPClient\Debug" -I"D:\zj\Project_Ch32v307\prj\TCPClient\Peripheral\inc" -I"D:\zj\Project_Ch32v307\prj\TCPClient\User" -I"D:\zj\Project_Ch32v307\prj\TCPClient\FreeRTOS\include" -I"D:\zj\Project_Ch32v307\prj\TCPClient\FreeRTOS\portable\GCC\RISC-V" -I"D:\zj\Project_Ch32v307\prj\TCPClient\FreeRTOS\portable\GCC\RISC-V\chip_specific_extensions\RV32I_PFIC_no_extensions" -std=gnu99 -MMD -MP -MF"$(@:%.o=%.d)" -MT"$(@)" -c -o "$@" "$<"
+	@	@
+
+FreeRTOS/portable/GCC/RISC-V/%.o: ../FreeRTOS/portable/GCC/RISC-V/%.c
+	@	@	riscv-none-embed-gcc -march=rv32imacxw -mabi=ilp32 -msmall-data-limit=8 -msave-restore -Os -fmessage-length=0 -fsigned-char -ffunction-sections -fdata-sections -fno-common -Wunused -Wuninitialized  -g -I"D:\zj\Project_Ch32v307\prj\TCPClient\NetLib" -I"D:\zj\Project_Ch32v307\prj\TCPClient\Core" -I"D:\zj\Project_Ch32v307\prj\TCPClient\Debug" -I"D:\zj\Project_Ch32v307\prj\TCPClient\Peripheral\inc" -I"D:\zj\Project_Ch32v307\prj\TCPClient\User" -I"D:\zj\Project_Ch32v307\prj\TCPClient\FreeRTOS\include" -I"D:\zj\Project_Ch32v307\prj\TCPClient\FreeRTOS\portable\GCC\RISC-V" -I"D:\zj\Project_Ch32v307\prj\TCPClient\FreeRTOS\portable\GCC\RISC-V\chip_specific_extensions\RV32I_PFIC_no_extensions" -std=gnu99 -MMD -MP -MF"$(@:%.o=%.d)" -MT"$(@)" -c -o "$@" "$<"
+	@	@
+
+FreeRTOS/portable/GCC/RISC-V/%.o: ../FreeRTOS/portable/GCC/RISC-V/%.S
+	@	@	riscv-none-embed-gcc -march=rv32imacxw -mabi=ilp32 -msmall-data-limit=8 -msave-restore -Os -fmessage-length=0 -fsigned-char -ffunction-sections -fdata-sections -fno-common -Wunused -Wuninitialized  -g -x assembler-with-cpp -I"D:\zj\Project_Ch32v307\prj\TCPClient\Startup" -I"D:\zj\Project_Ch32v307\prj\TCPClient\FreeRTOS\include" -I"D:\zj\Project_Ch32v307\prj\TCPClient\FreeRTOS\portable\GCC\RISC-V" -I"D:\zj\Project_Ch32v307\prj\TCPClient\FreeRTOS\portable\GCC\RISC-V\chip_specific_extensions\RV32I_PFIC_no_extensions" -MMD -MP -MF"$(@:%.o=%.d)" -MT"$(@)" -c -o "$@" "$<"
+	@	@
+

prj/TCPClient/obj/Middle/QDXnetworkStack/subdir.mk

@@ -5,19 +5,19 @@
 
 # Add inputs and outputs from these tool invocations to the build variables 
 C_SRCS += \
-../Middle/QDXnetworkStack/qdx_port_template.c \
+../Middle/QDXnetworkStack/qdx_port.c \
 ../Middle/QDXnetworkStack/qdx_preprocess.c \
 ../Middle/QDXnetworkStack/qdx_protocol.c \
 ../Middle/QDXnetworkStack/qdx_tcp_logic.c 
 
 OBJS += \
-./Middle/QDXnetworkStack/qdx_port_template.o \
+./Middle/QDXnetworkStack/qdx_port.o \
 ./Middle/QDXnetworkStack/qdx_preprocess.o \
 ./Middle/QDXnetworkStack/qdx_protocol.o \
 ./Middle/QDXnetworkStack/qdx_tcp_logic.o 
 
 C_DEPS += \
-./Middle/QDXnetworkStack/qdx_port_template.d \
+./Middle/QDXnetworkStack/qdx_port.d \
 ./Middle/QDXnetworkStack/qdx_preprocess.d \
 ./Middle/QDXnetworkStack/qdx_protocol.d \
 ./Middle/QDXnetworkStack/qdx_tcp_logic.d 
@@ -25,6 +25,6 @@ C_DEPS += \
 
 # Each subdirectory must supply rules for building sources it contributes
 Middle/QDXnetworkStack/%.o: ../Middle/QDXnetworkStack/%.c
-	@	@	riscv-none-embed-gcc -march=rv32imacxw -mabi=ilp32 -msmall-data-limit=8 -msave-restore -Os -fmessage-length=0 -fsigned-char -ffunction-sections -fdata-sections -fno-common -Wunused -Wuninitialized  -g -I"D:\zj\Project_Ch32v307\prj\TCPClient\NetLib" -I"D:\zj\Project_Ch32v307\prj\TCPClient\Core" -I"D:\zj\Project_Ch32v307\prj\TCPClient\Debug" -I"D:\zj\Project_Ch32v307\prj\TCPClient\Peripheral\inc" -I"D:\zj\Project_Ch32v307\prj\TCPClient\User" -std=gnu99 -MMD -MP -MF"$(@:%.o=%.d)" -MT"$(@)" -c -o "$@" "$<"
+	@	@	riscv-none-embed-gcc -march=rv32imacxw -mabi=ilp32 -msmall-data-limit=8 -msave-restore -Os -fmessage-length=0 -fsigned-char -ffunction-sections -fdata-sections -fno-common -Wunused -Wuninitialized  -g -I"D:\zj\Project_Ch32v307\prj\TCPClient\NetLib" -I"D:\zj\Project_Ch32v307\prj\TCPClient\Core" -I"D:\zj\Project_Ch32v307\prj\TCPClient\Debug" -I"D:\zj\Project_Ch32v307\prj\TCPClient\Peripheral\inc" -I"D:\zj\Project_Ch32v307\prj\TCPClient\User" -I"D:\zj\Project_Ch32v307\prj\TCPClient\FreeRTOS\include" -I"D:\zj\Project_Ch32v307\prj\TCPClient\FreeRTOS\portable\GCC\RISC-V" -I"D:\zj\Project_Ch32v307\prj\TCPClient\FreeRTOS\portable\GCC\RISC-V\chip_specific_extensions\RV32I_PFIC_no_extensions" -std=gnu99 -MMD -MP -MF"$(@:%.o=%.d)" -MT"$(@)" -c -o "$@" "$<"
 	@	@
 

prj/TCPClient/obj/User/subdir.mk

@@ -22,6 +22,6 @@ C_DEPS += \
 
 # Each subdirectory must supply rules for building sources it contributes
 User/%.o: ../User/%.c
-	@	@	riscv-none-embed-gcc -march=rv32imacxw -mabi=ilp32 -msmall-data-limit=8 -msave-restore -Os -fmessage-length=0 -fsigned-char -ffunction-sections -fdata-sections -fno-common -Wunused -Wuninitialized  -g -I"D:\zj\Project_Ch32v307\prj\TCPClient\NetLib" -I"D:\zj\Project_Ch32v307\prj\TCPClient\Core" -I"D:\zj\Project_Ch32v307\prj\TCPClient\Debug" -I"D:\zj\Project_Ch32v307\prj\TCPClient\Peripheral\inc" -I"D:\zj\Project_Ch32v307\prj\TCPClient\User" -std=gnu99 -MMD -MP -MF"$(@:%.o=%.d)" -MT"$(@)" -c -o "$@" "$<"
+	@	@	riscv-none-embed-gcc -march=rv32imacxw -mabi=ilp32 -msmall-data-limit=8 -msave-restore -Os -fmessage-length=0 -fsigned-char -ffunction-sections -fdata-sections -fno-common -Wunused -Wuninitialized  -g -I"D:\zj\Project_Ch32v307\prj\TCPClient\NetLib" -I"D:\zj\Project_Ch32v307\prj\TCPClient\Core" -I"D:\zj\Project_Ch32v307\prj\TCPClient\Debug" -I"D:\zj\Project_Ch32v307\prj\TCPClient\Peripheral\inc" -I"D:\zj\Project_Ch32v307\prj\TCPClient\User" -I"D:\zj\Project_Ch32v307\prj\TCPClient\FreeRTOS\include" -I"D:\zj\Project_Ch32v307\prj\TCPClient\FreeRTOS\portable\GCC\RISC-V" -I"D:\zj\Project_Ch32v307\prj\TCPClient\FreeRTOS\portable\GCC\RISC-V\chip_specific_extensions\RV32I_PFIC_no_extensions" -I"D:\zj\Project_Ch32v307\prj\TCPClient\Middle\QDXnetworkStack" -std=gnu99 -MMD -MP -MF"$(@:%.o=%.d)" -MT"$(@)" -c -o "$@" "$<"
 	@	@
 

prj/TCPClient/obj/makefile

@@ -14,6 +14,7 @@ RM := rm -rf
 -include Peripheral/src/subdir.mk
 -include NetLib/subdir.mk
 -include Middle/QDXnetworkStack/subdir.mk
+-include FreeRTOS/subdir.mk
 -include Debug/subdir.mk
 -include Core/subdir.mk
 -include subdir.mk

prj/TCPClient/obj/sources.mk

@@ -25,6 +25,9 @@ C_DEPS :=
 SUBDIRS := \
 Core \
 Debug \
+FreeRTOS \
+FreeRTOS/portable/GCC/RISC-V \
+FreeRTOS/portable/MemMang \
 Middle/QDXnetworkStack \
 NetLib \
 Peripheral/src \