We are trying to get UART-receiver to work in interrupt mode.

[RLind.2]

Here is the code that doesn't work. Any suggestions?

UART_HandleTypeDef UartHandle;

uint8_t MyRxBuf[ 10 ], MyTxBuf[3];

int main( void ) {

  uint32_t t_print;

  int16_t i;

  HAL_Init();

  SystemClock_Config();

 /* Put the USART peripheral in the Asynchronous mode (UART Mode) */

 /* UART2 configured as follows:

   - Word Length = 8 Bits

   - Stop Bit = One Stop bit

   - Parity = none

   - BaudRate = 38400 baud

   - Hardware flow control disabled (RTS and CTS signals) */

  UartHandle.Instance     = USART2;

  UartHandle.Init.BaudRate   = 38400;

  UartHandle.Init.WordLength  = UART_WORDLENGTH_8B;

  UartHandle.Init.StopBits   = UART_STOPBITS_1;

  UartHandle.Init.Parity    = UART_PARITY_NONE;

  UartHandle.Init.HwFlowCtl  = UART_HWCONTROL_NONE;

  UartHandle.Init.Mode     = UART_MODE_TX_RX;

  UartHandle.Init.OverSampling = UART_OVERSAMPLING_16;

  UartHandle.pTxBuffPtr    = &MyTxBuf[ 0 ];

  UartHandle.TxXferSize    = 3;

  UartHandle.pRxBuffPtr    = &MyRxBuf[ 0 ];

  UartHandle.RxXferSize    = 10;

  UartHandle.RxXferCount    = 3;

  if(HAL_UART_Init(&UartHandle) != HAL_OK) {

   Error_Handler(); 

  }

  HAL_UART_Receive_IT( &UartHandle, &MyRxBuf[ 0 ], 1 ); // Needed?

  /* Infinite loop */ 

  t_print = get_RTC();

  while (1) {

   if( get_RTC() > t_print ) {

     t_print += 2000UL; // Print buffer every 2 seconds

     printf("RxCnt %d ", UartHandle.RxXferCount );

     for(i=0;i<10;i++) printf("%d ", MyRxBuf[i] );

     printf("\n\r");

   }

  }

}

[TDK]

Are you initializing pins?

Does your interrupt handler call HAL_UART_IRQHandler?

[RLind.2]

Hello,

Sorry for delay in answer.

We don't know how to do that. Could you give example of how to call HAL_UART_IRQHandler?

[TDK]

Generate code from CubeMX and it will (probably) do this for you. Or check out a UART interrupt example in the appropriate cube repository.