大佬们，我用stm32cubemx生成的代码，用dma写的串口数据不定长接收，但是无法进入空闲中断是怎么回事呀，请求大佬支援

2670859546

void USART2_IRQHandler(void)
{
  /* USER CODE BEGIN USART2_IRQn 0 */
       
        if(__HAL_UART_GET_FLAG(&huart2,UART_IT_IDLE) != RESET)
        {
               
                __HAL_UART_CLEAR_IDLEFLAG(&huart2);
               
                HAL_UART_DMAStop(&huart2);
               
                uint8_t len = 3 - __HAL_DMA_GET_COUNTER(huart2.hdmarx);
               
                HAL_UART_Transmit_DMA(&huart2,data,len);
               
                HAL_UART_Receive_DMA(&huart2,data,3);
        }
  /* USER CODE END USART2_IRQn 0 */
  HAL_UART_IRQHandler(&huart2);
  /* USER CODE BEGIN USART2_IRQn 1 */

  /* USER CODE END USART2_IRQn 1 */
}
int main(void)
{
  /* USER CODE BEGIN 1 */
       
       

  /* USER CODE END 1 */

  /* MCU Configuration--------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* Configure the system clock */
  SystemClock_Config();

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_DMA_Init();
  MX_USART2_UART_Init();
  MX_USB_Device_Init();
  MX_TIM2_Init();
  MX_USART1_UART_Init();
  MX_USART3_UART_Init();
  /* USER CODE BEGIN 2 */
        HAL_UART_Receive_DMA(&huart2,data,3);

  /* USER CODE END 2 */

  /* Call init function for freertos objects (in freertos.c) */
  MX_FREERTOS_Init();
  /* Start scheduler */
  osKernelStart();

  /* We should never get here as control is now taken by the scheduler */
  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
  }
  /* USER CODE END 3 */
}

kfdn5555

STM的空闲中断在CUBEMX配置的时候不会自动帮你打开，需要你自己初始化加入进去，
MX_USART2_UART_Init();
__HAL_UART_ENABLE_IT(&huart2, UART_IT_IDLE);//加入空闲中断初始化
HAL_UART_Receive_DMA(&huart2,data,3);