diff --git a/software/Power_Pico/USB_DEVICE/App/usbd_cdc_if.c b/software/Power_Pico/USB_DEVICE/App/usbd_cdc_if.c
index 15478bc..bc48f09 100644
--- a/software/Power_Pico/USB_DEVICE/App/usbd_cdc_if.c
+++ b/software/Power_Pico/USB_DEVICE/App/usbd_cdc_if.c
@@ -23,14 +23,8 @@
 
 /* USER CODE BEGIN INCLUDE */
 
-/* 全局标志位，供 main.c 检测跳转 */
-volatile bool g_update_req = false;
-bool get_update_request(void) {
-    return g_update_req;
-}
-void set_update_request(bool req) {
-    g_update_req = req;
-}
+#include "user_TasksInit.h"
+
 /* USER CODE END INCLUDE */
 
 /* Private typedef -----------------------------------------------------------*/
@@ -276,7 +270,9 @@ static int8_t CDC_Receive_FS(uint8_t* Buf, uint32_t *Len)
       Buf[*Len] = 0; // 截断
 
       if (strstr((char*)Buf, "update") != NULL) {
-          set_update_request(true); // 置位，主循环看到后执行 JumpToBootloader
+          if (MessageReceiveTaskHandle != NULL) {
+            osThreadFlagsSet(MessageReceiveTaskHandle, FLAG_USB_UPDATE_REQ);
+          }
       }
 
       Buf[*Len] = temp_char; // 恢复 (虽然这里可能不需要)
diff --git a/software/Power_Pico/USB_DEVICE/App/usbd_cdc_if.h b/software/Power_Pico/USB_DEVICE/App/usbd_cdc_if.h
index c826ca7..53b6983 100644
--- a/software/Power_Pico/USB_DEVICE/App/usbd_cdc_if.h
+++ b/software/Power_Pico/USB_DEVICE/App/usbd_cdc_if.h
@@ -109,8 +109,7 @@ extern USBD_CDC_ItfTypeDef USBD_Interface_fops_FS;
 uint8_t CDC_Transmit_FS(uint8_t* Buf, uint16_t Len);
 
 /* USER CODE BEGIN EXPORTED_FUNCTIONS */
-void set_update_request(bool req);
-bool get_update_request(void);
+
 /* USER CODE END EXPORTED_FUNCTIONS */
 
 /**
diff --git a/software/Power_Pico/User/Tasks/Inc/user_TasksInit.h b/software/Power_Pico/User/Tasks/Inc/user_TasksInit.h
index b544529..56ccd66 100644
--- a/software/Power_Pico/User/Tasks/Inc/user_TasksInit.h
+++ b/software/Power_Pico/User/Tasks/Inc/user_TasksInit.h
@@ -17,10 +17,12 @@ typedef struct {
 
 // 定义一个标志位，表示 ADC 数据已经准备好，在ADC DMA中断中被置位
 // 在 MessageSendTask 中等待这个标志位，表示可以发送 ADC 数据了
-#define FLAG_ADC_HALF_READY  0x0001U  // 0000 0001
-#define FLAG_ADC_FULL_READY  0x0002U  // 0000 0010
+#define FLAG_ADC_HALF_READY  0x0001U  // 0000 0001 ADC 半满
+#define FLAG_ADC_FULL_READY  0x0002U  // 0000 0010 ADC 全满
+#define FLAG_USB_UPDATE_REQ  0x0004U  // 0000 0100 USB 请求升级
 
 extern osThreadId_t MessageSendTaskHandle;
+extern osThreadId_t MessageReceiveTaskHandle;
 
 extern osMessageQueueId_t Key_MessageQueue;
 extern osMessageQueueId_t PD_cmd_MessageQueue;
diff --git a/software/Power_Pico/User/Tasks/Src/user_MessageTask.c b/software/Power_Pico/User/Tasks/Src/user_MessageTask.c
index ab8e207..6bd0a7a 100644
--- a/software/Power_Pico/User/Tasks/Src/user_MessageTask.c
+++ b/software/Power_Pico/User/Tasks/Src/user_MessageTask.c
@@ -3,7 +3,6 @@
 #include "adc.h"
 #include "user_TasksInit.h"
 #include "user_MessageTask.h"
-#include "usbd_cdc_if.h"
 #include "usb_device.h"
 #include "BL24C02.h"
 
@@ -13,6 +12,9 @@
 
 /* Private variables ---------------------------------------------------------*/
 
+/* 10kHz / 100 / 10 = 10Hz UI data refresh rate */
+#define UI_UPDATE_DIV 10
+
 /* Private function prototypes -----------------------------------------------*/
 
 
@@ -23,12 +25,14 @@
   */
 void MessageReceiveTask(void *argument)
 {
+	uint32_t flags;
 	while(1)
 	{
-    if(get_update_request()) {
+    flags = osThreadFlagsWait(FLAG_USB_UPDATE_REQ,
+                              osFlagsWaitAny,
+                              osWaitForever);
 
-      // clear the flag
-      set_update_request(false);
+    if ((flags & 0x80000000U) == 0U) {
       // set the EEPROM flag
       EEPROM_UpdateCommand_Write(true);
       HAL_Delay(100);
@@ -38,7 +42,7 @@ void MessageReceiveTask(void *argument)
       // reset
       NVIC_SystemReset();
     }
-		osDelay(500);
+    HAL_Delay(500);
 	}
 }
 
@@ -49,6 +53,7 @@ void MessageReceiveTask(void *argument)
 void MessageSendTask(void *argument)
 {
   uint32_t flags;
+  uint32_t ui_div_cnt = 0;
   while (1)
   {
     // 1. 等待两个标志中的任意一个 (osFlagsWaitAny)
@@ -72,19 +77,21 @@ void MessageSendTask(void *argument)
         Process_ADC_Chunk(&adc_raw_buffer[ADC_TIMES][0], 1);
     }
 
-    // 发送数据给UI层进行显示
-    PowerData_t newData;
-    Data_Monitor_Get_Values(&newData.voltage, &newData.current);
+    // 4. 限频：每 UI_UPDATE_DIV 次才往队列写一次
+    if (++ui_div_cnt >= UI_UPDATE_DIV)
+    {
+        ui_div_cnt = 0;
 
-    // 尝试发送，如果不等待直接返回错误，说明队列可能满了
-    osStatus_t status = osMessageQueuePut(PowerDataQueue, &newData, 0, 0);
+        PowerData_t newData;
+        Data_Monitor_Get_Values(&newData.voltage, &newData.current);
 
-    if (status == osErrorResource) {
-        PowerData_t dummy;
-        // 1. 强行从队列头部取出一个旧数据（丢弃）
-        osMessageQueueGet(PowerDataQueue, &dummy, NULL, 0);
-        // 2. 再次存入新数据
-        osMessageQueuePut(PowerDataQueue, &newData, 0, 0);
+        osStatus_t status = osMessageQueuePut(PowerDataQueue, &newData, 0, 0);
+        if (status == osErrorResource) {
+            PowerData_t dummy;
+            // 队列满：丢弃旧数据，写入新数据
+            osMessageQueueGet(PowerDataQueue, &dummy, NULL, 0);
+            osMessageQueuePut(PowerDataQueue, &newData, 0, 0);
+        }
     }
   }
 }