diff --git a/prj/TCPClient/Startup/startup_ch32v30x_D8.S b/prj/TCPClient/Startup/startup_ch32v30x_D8.S
index f3ec0ab..3371f55 100644
--- a/prj/TCPClient/Startup/startup_ch32v30x_D8.S
+++ b/prj/TCPClient/Startup/startup_ch32v30x_D8.S
@@ -336,10 +336,10 @@ handle_reset:
     li t0, 0x1f
     csrw 0xbc0, t0
 /* Enable interrupt nesting and hardware stack */
-	li t0, 0x0b
+	li t0, 0x1f
 	csrw 0x804, t0
 /* Enable floating point and global interrupt, configure privileged mode */
-   	li t0, 0x6088
+   	li t0, 0x7800
    	csrw mstatus, t0
 /* Configure the interrupt vector table recognition mode and entry address mode */
  	la t0, _vector_base
diff --git a/prj/TCPClient/Startup/startup_ch32v30x_D8C.S b/prj/TCPClient/Startup/startup_ch32v30x_D8C.S
index 17c4f8e..d9adeb3 100644
--- a/prj/TCPClient/Startup/startup_ch32v30x_D8C.S
+++ b/prj/TCPClient/Startup/startup_ch32v30x_D8C.S
@@ -356,10 +356,10 @@ handle_reset:
     li t0, 0x1f
     csrw 0xbc0, t0
 /* Enable interrupt nesting and hardware stack */
-	li t0, 0x0b
+	li t0, 0x1f
 	csrw 0x804, t0
-/* Enable floating point and global interrupt, configure privileged mode */
-   	li t0, 0x6088           
+/* Enable global interrupt, configure privileged mode */
+   	li t0, 0x7800           
    	csrw mstatus, t0
 /* Configure the interrupt vector table recognition mode and entry address mode */
  	la t0, _vector_base
diff --git a/prj/TCPClient/User/main.c b/prj/TCPClient/User/main.c
index c8ee851..3c9819a 100644
--- a/prj/TCPClient/User/main.c
+++ b/prj/TCPClient/User/main.c
@@ -8,7 +8,6 @@
 
 #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];
@@ -40,13 +39,8 @@ void OnConfigUpdate(const ConfigCommon_t *common, const Config2D_t *cfg2d, const
 #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)
-{
-    (void)xTimer;
-    GPIO_ResetBits(NG_GPIO_PORT, NG_GPIO_PIN);
-}
+static volatile uint32_t g_ng_off_time = 0;
+extern volatile uint32_t sys_tick_ms;
 
 static void NG_GPIO_Init(void)
 {
@@ -57,9 +51,6 @@ static void NG_GPIO_Init(void)
     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)
@@ -68,8 +59,7 @@ void OnDetectionResult(uint32_t frameNumber, uint8_t resultStatus)
     /* 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);
+        g_ng_off_time = sys_tick_ms + NG_PULSE_MS;
     }
 }
 
@@ -222,6 +212,12 @@ static void task_business_entry(void *pvParameters)
 
     while (1)
     {
+        /* NG pulse off check */
+        if (g_ng_off_time && sys_tick_ms >= g_ng_off_time) {
+            GPIO_ResetBits(NG_GPIO_PORT, NG_GPIO_PIN);
+            g_ng_off_time = 0;
+        }
+
         DVP_Task();
 
         if (Frame_Ready_Flag)