From 82f489bf5c646bdf76c1af29af3c6aac5e2fdb1e Mon Sep 17 00:00:00 2001
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 <1425962791@qq.com>
Date: Sun, 19 Oct 2025 12:00:28 +0800
Subject: [PATCH] =?UTF-8?q?=E5=8A=A0=E5=85=A5=E4=B8=B2=E5=8F=A3=E6=8E=A5?=
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---
 Power_Pico/Core/Inc/usart.h        |  3 ++-
 Power_Pico/Core/Src/stm32f4xx_it.c |  3 ++-
 Power_Pico/Core/Src/usart.c        | 10 +++++++++-
 3 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/Power_Pico/Core/Inc/usart.h b/Power_Pico/Core/Inc/usart.h
index c7eeb59..e79edbb 100644
--- a/Power_Pico/Core/Inc/usart.h
+++ b/Power_Pico/Core/Inc/usart.h
@@ -36,7 +36,8 @@ extern UART_HandleTypeDef huart6;
 
 /* USER CODE BEGIN Private defines */
 #define USART_RX_BUFFER_SIZE 25
-extern uint8_t uart_receive_str[USART_RX_BUFFER_SIZE + 1];
+extern uint8_t uart_receive_buf[USART_RX_BUFFER_SIZE + 1];
+extern uint8_t uart_receive_flag;
 /* USER CODE END Private defines */
 
 void MX_USART6_UART_Init(void);
diff --git a/Power_Pico/Core/Src/stm32f4xx_it.c b/Power_Pico/Core/Src/stm32f4xx_it.c
index 44b129a..3940eea 100644
--- a/Power_Pico/Core/Src/stm32f4xx_it.c
+++ b/Power_Pico/Core/Src/stm32f4xx_it.c
@@ -250,9 +250,10 @@ void USART6_IRQHandler(void)
   /* USER CODE BEGIN USART6_IRQn 0 */
   if(__HAL_UART_GET_FLAG(&huart6, UART_FLAG_IDLE) != RESET)
   {
+    uart_receive_flag = 1;
     __HAL_UART_CLEAR_FLAG(&huart6, UART_FLAG_IDLE);
     HAL_UART_DMAStop(&huart6);
-    HAL_UART_Receive_DMA(&huart6, uart_receive_str, USART_RX_BUFFER_SIZE);
+    HAL_UART_Receive_DMA(&huart6, uart_receive_buf, USART_RX_BUFFER_SIZE);
   }
 
   /* USER CODE END USART6_IRQn 0 */
diff --git a/Power_Pico/Core/Src/usart.c b/Power_Pico/Core/Src/usart.c
index c4050b0..5876168 100644
--- a/Power_Pico/Core/Src/usart.c
+++ b/Power_Pico/Core/Src/usart.c
@@ -21,9 +21,11 @@
 #include "usart.h"
 
 /* USER CODE BEGIN 0 */
+#include "stdio.h"
 
 // memeory for receive string
-uint8_t uart_receive_str[USART_RX_BUFFER_SIZE + 1];
+uint8_t uart_receive_buf[USART_RX_BUFFER_SIZE + 1];
+uint8_t uart_receive_flag = 0; // flag for receive complete
 
 /* USER CODE END 0 */
 
@@ -162,6 +164,12 @@ void HAL_UART_MspDeInit(UART_HandleTypeDef* uartHandle)
 
 /* USER CODE BEGIN 1 */
 
+int fputc(int ch, FILE *f)
+{
+  HAL_UART_Transmit(&huart6, (uint8_t *)&ch, 1, 0xffff);
+  return ch;
+}
+
 //串口6发送
 void UART6_TX_Send(uint8_t *buffer, uint16_t length)
 {