uart issue in interrupt

[ASaxe.1]

HI All,

I am using STM32F303 board and receiving data from UART3 in interrupt mode.

but in my code UART only working in debugging mode when i use break points.

at that time everything working fine but when I wan to use with out break points it will not work.

Can anyone tell me what else I can do

__HAL_UART_ENABLE_IT(&huart3,UART_IT_RXNE);
 
This line used in before main funcation

v
void MX_USART3_UART_Init(void)
{
 
  huart3.Instance = USART3;
  huart3.Init.BaudRate = 115200;
  huart3.Init.WordLength = UART_WORDLENGTH_8B;
  huart3.Init.StopBits = UART_STOPBITS_1;
  huart3.Init.Parity = UART_PARITY_NONE;
  huart3.Init.Mode = UART_MODE_TX_RX;
  huart3.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart3.Init.OverSampling = UART_OVERSAMPLING_16;
  huart3.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
  huart3.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
  if (HAL_UART_Init(&huart3) != HAL_OK)
  {
    Error_Handler();
  }
 
}
 
void HAL_UART_MspInit(UART_HandleTypeDef* uartHandle)
{
 
  GPIO_InitTypeDef GPIO_InitStruct = {0};
  if(uartHandle->Instance==USART3)
  {
  /* USER CODE BEGIN USART3_MspInit 0 */
 
  /* USER CODE END USART3_MspInit 0 */
    /* USART3 clock enable */
    __HAL_RCC_USART3_CLK_ENABLE();
  
    __HAL_RCC_GPIOD_CLK_ENABLE();
    /**USART3 GPIO Configuration    
    PD8     ------> USART3_TX
    PD9     ------> USART3_RX 
    */
    GPIO_InitStruct.Pin = TX_Pin|RX_Pin;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
    GPIO_InitStruct.Alternate = GPIO_AF7_USART3;
    HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
 
    /* USART3 interrupt Init */
    HAL_NVIC_SetPriority(USART3_IRQn, 0, 0);
    HAL_NVIC_EnableIRQ(USART3_IRQn);
  /* USER CODE BEGIN USART3_MspInit 1 */
 
  /* USER CODE END USART3_MspInit 1 */
  }
}
 
void HAL_UART_MspDeInit(UART_HandleTypeDef* uartHandle)
{
 
  if(uartHandle->Instance==USART3)
  {
  /* USER CODE BEGIN USART3_MspDeInit 0 */
 
  /* USER CODE END USART3_MspDeInit 0 */
    /* Peripheral clock disable */
    __HAL_RCC_USART3_CLK_DISABLE();
  
    /**USART3 GPIO Configuration    
    PD8     ------> USART3_TX
    PD9     ------> USART3_RX 
    */
    HAL_GPIO_DeInit(GPIOD, TX_Pin|RX_Pin);
 
    /* USART3 interrupt Deinit */
    HAL_NVIC_DisableIRQ(USART3_IRQn);
  /* USER CODE BEGIN USART3_MspDeInit 1 */
 
  /* USER CODE END USART3_MspDeInit 1 */
  }
} 
 
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
	if(huart->Instance==USART3){
	   msg_flag = 1;
	}
}
 
oid USART3_IRQHandler(void)
{
  /* USER CODE BEGIN USART3_IRQn 0 */
 
  /* USER CODE END USART3_IRQn 0 */
  HAL_UART_IRQHandler(&huart3);
  /* USER CODE BEGIN USART3_IRQn 1 */
  HAL_UART_Receive_IT(&huart3,rx_data,14) 
  /* USER CODE END USART3_IRQn 1 */
}

[Nikita91]

I don't know the HAL, but I think you shouldn't be using HAL_UART_Receive_IT inside an interrupt handler.

[TDK]

HAL_UART_Receive_IT should be called in the main loop, not an interrupt.

If you want to receive more data after one transmission is complete, call it again within HAL_UART_RxCpltCallback or in the main loop.