解决中断冲突

Core/Src/usart.c

@@ -69,6 +69,7 @@ void MX_USART1_UART_Init(void)
   }
   /* USER CODE BEGIN USART1_Init 2 */
 
+
   /* USER CODE END USART1_Init 2 */
 
 }
@@ -260,5 +261,14 @@ void HAL_UART_MspDeInit(UART_HandleTypeDef* uartHandle)
 }
 
 /* USER CODE BEGIN 1 */
-
+int _write (int fd, char *pBuffer, int size)
+{
+  for (int i = 0; i < size; i++)
+  {
+    USART1->TDR =  (unsigned  char) *(pBuffer+i);
+    while((USART1->ISR & USART_ISR_TC) == 0)
+    {}
+  }
+  return size;
+}
 /* USER CODE END 1 */