蓝桥杯嵌入式 FreeRtos + DMA +空闲中断 初始化会卡死的问题

一、初始化

  MX_USART1_UART_Init();
  __HAL_UART_ENABLE_IT(&huart1, UART_IT_IDLE);
	HAL_UART_Receive_DMA(&huart1, U_1.Rx_Buf, 36);

二、中断的写法问题！！

1.中断1

按照以下的写法出现一个问题，初始化  __HAL_UART_ENABLE_IT(&huart1, UART_IT_IDLE);这一条时系统会卡死。

extern osMessageQueueId_t Uart_QueueHandle;
uint8_t u_num = 0;
char Cmd_1[] = "szm";
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
  if(__HAL_UART_GET_FLAG(&huart1, UART_FLAG_IDLE) != 0)
	{
		  __HAL_UART_CLEAR_IDLEFLAG(&huart1);
		  HAL_UART_DMAStop(&huart1);
			U_1.Rx_Buf_Index = 36 - (__HAL_DMA_GET_COUNTER(&hdma_usart1_rx));
		 
			if(U_1.Rx_Buf_Index == 2)
			{
					if(strncmp(Cmd_1, (char *)U_1.Rx_Buf, 2) == 1)
					{
						  u_num = 0; osMessageQueuePut(Uart_QueueHandle, &u_num, NULL, NULL);
								
					}
			}
	}
	HAL_UART_Receive_DMA(&huart1, U_1.Rx_Buf, 36);
}

2.中断2

按照以下的写法，自己随便改一个名字，把这个函数放在下面的位置就不会出错。

extern osMessageQueueId_t Uart_QueueHandle;
uint8_t u_num = 0;
char Cmd_1[] = "szm";
void Hl_Uart_Receive_Callback(void)
{
  if(__HAL_UART_GET_FLAG(&huart1, UART_FLAG_IDLE) != 0)
	{
		  __HAL_UART_CLEAR_IDLEFLAG(&huart1);
		  HAL_UART_DMAStop(&huart1);
			U_1.Rx_Buf_Index = 36 - (__HAL_DMA_GET_COUNTER(&hdma_usart1_rx));
		 
			if(U_1.Rx_Buf_Index == 2)
			{
					if(strncmp(Cmd_1, (char *)U_1.Rx_Buf, 2) == 1)
					{
						  u_num = 0; osMessageQueuePut(Uart_QueueHandle, &u_num, NULL, NULL);
								
					}
			}
	}
	HAL_UART_Receive_DMA(&huart1, U_1.Rx_Buf, 36);
}

void USART1_IRQHandler(void)
{
  /* USER CODE BEGIN USART1_IRQn 0 */
	Hl_Uart_Receive_Callback();
  /* USER CODE END USART1_IRQn 0 */
  HAL_UART_IRQHandler(&huart1);
  /* USER CODE BEGIN USART1_IRQn 1 */

  /* USER CODE END USART1_IRQn 1 */
}