Receive data from multiple Serial ports as Interrupt STM32F103RE

[AAnju.1]

Hi, i need to receive serial data as ISR. i have 3 USART module. this is my test code. this is work fine. but some time suddenly stop the firing ISR routing of receiving event .when i call this line after stop the modem RX ISR function

 HAL_UART_Receive_DMA(&huart4, buff_modem_ISR, 1);

again code is work fine.

what will the issue. cant we write 3 separate ISR_RX_COMPLETE function?

Greetings

uint8_t buff_deb_ISR[10];
 uint8_t buff_modem_ISR[10];
 uint8_t buff_gps_ISR[10];
 
 
void init_modem(uint16_t baud ){
  huart4.Instance = UART4;
  huart4.Init.BaudRate = baud;
  huart4.Init.WordLength = UART_WORDLENGTH_8B;
  huart4.Init.StopBits = UART_STOPBITS_1;
  huart4.Init.Parity = UART_PARITY_NONE;
  huart4.Init.Mode = UART_MODE_TX_RX;
  huart4.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart4.Init.OverSampling = UART_OVERSAMPLING_16;
 
  if (HAL_UART_Init(&huart4) != HAL_OK)
  {
		printf("usrat 4 error\r\n");
   // Error_Handler();
  }
 
	 
 }
 
 
/**
  * @brief USART1 Initialization Function
  * @param None
  * @retval None
  */
 
 void init_gps(uint16_t baud )
{
 
  /* USER CODE BEGIN USART1_Init 0 */
 
  /* USER CODE END USART1_Init 0 */
 
  /* USER CODE BEGIN USART1_Init 1 */
 
  /* USER CODE END USART1_Init 1 */
  huart1.Instance = USART1;
  huart1.Init.BaudRate = baud;
  huart1.Init.WordLength = UART_WORDLENGTH_8B;
  huart1.Init.StopBits = UART_STOPBITS_1;
  huart1.Init.Parity = UART_PARITY_NONE;
  huart1.Init.Mode = UART_MODE_TX_RX;
  huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart1.Init.OverSampling = UART_OVERSAMPLING_16;
  if (HAL_UART_Init(&huart1) != HAL_OK)
  {
   // Error_Handler();
  }
  /* USER CODE BEGIN USART1_Init 2 */
 
  /* USER CODE END USART1_Init 2 */
 
}
 
/**
  * @brief USART2 Initialization Function
  * @param None
  * @retval None
  */
 
void init_debug(uint16_t baud ) 
{
 
  /* USER CODE BEGIN USART2_Init 0 */
 
  /* USER CODE END USART2_Init 0 */
 
  /* USER CODE BEGIN USART2_Init 1 */
 
  /* USER CODE END USART2_Init 1 */
  huart2.Instance = USART2;
  huart2.Init.BaudRate = baud;
  huart2.Init.WordLength = UART_WORDLENGTH_8B;
  huart2.Init.StopBits = UART_STOPBITS_1;
  huart2.Init.Parity = UART_PARITY_NONE;
  huart2.Init.Mode = UART_MODE_TX_RX;
  huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart2.Init.OverSampling = UART_OVERSAMPLING_16;
  if (HAL_UART_Init(&huart2) != HAL_OK)
  {
   // Error_Handler();
  }
  /* USER CODE BEGIN USART2_Init 2 */
 
  /* USER CODE END USART2_Init 2 */
}
 
 
/** 
  * Enable DMA controller clock
  */
  void DMA_init(void) 
{
 
  /* DMA controller clock enable */
  __HAL_RCC_DMA1_CLK_ENABLE();
  __HAL_RCC_DMA2_CLK_ENABLE();
 
  /* DMA interrupt init */
  /* DMA1_Channel2_IRQn interrupt configuration */ //timer
  HAL_NVIC_SetPriority(DMA1_Channel2_IRQn, 0, 0);  
  HAL_NVIC_EnableIRQ(DMA1_Channel2_IRQn);
  /* DMA1_Channel5_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(DMA1_Channel5_IRQn, 0, 0); //usart1
  HAL_NVIC_EnableIRQ(DMA1_Channel5_IRQn);
  /* DMA1_Channel6_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(DMA1_Channel6_IRQn, 0, 0); //usart2
  HAL_NVIC_EnableIRQ(DMA1_Channel6_IRQn);
  /* DMA2_Channel3_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(DMA2_Channel3_IRQn, 0, 0);//usart4
  HAL_NVIC_EnableIRQ(DMA2_Channel3_IRQn);
 
	
}
 
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{ 
 
if(huart->Instance==USART1) {
	//do 
	printf("gps %c",buff_gps_ISR[0]);
}
else if(huart->Instance==USART2) {
	//do 
	printf("debug %c",buff_deb_ISR[0]);
}
else if(huart->Instance==UART4) {
	//do 
	printf("modem %c",buff_modem_ISR[0]);
}
 
 
}
 
void main(){
	 DMA_init();
	init_modem(9600);
	init_gps(2400);
	init_debug(9600);
	
	 HAL_UART_Receive_DMA(&huart4, buff_modem_ISR, 1);
	 HAL_UART_Receive_DMA(&huart1,buff_gps_ISR, 1);
	HAL_UART_Receive_DMA(&huart2,buff_deb_ISR, 1);
 
 
 
while(1);

[Tesla DeLorean]

>>what will the issue. cant we write 3 separate ISR_RX_COMPLETE function?

If you want to use the HAL/Callback methods, HAL_UART_RxCpltCallback() will need to decompose and dispatch individual routines.

The hardware is capable of doing dispatch/service directly in the IRQ Handler.

>>but some time suddenly stop the firing ISR routing of receiving event.

a) Don't do multi-character printf() or delays in the callback, it is occurring under interrupt context.

b) Dispatch a new HAL_UART_Receive_DMA(), to restart for a new character, or batch of.