HAL_StatusTypeDef HAL_UART_RegisterCallback()

in CMake-armcc/Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_uart.c [734:842]
85 lines of code
19 McCabe index (conditional complexity)

HAL_StatusTypeDef HAL_UART_RegisterCallback(UART_HandleTypeDef *huart, HAL_UART_CallbackIDTypeDef CallbackID,
                                            pUART_CallbackTypeDef pCallback)
{
  HAL_StatusTypeDef status = HAL_OK;

  if (pCallback == NULL)
  {
    huart->ErrorCode |= HAL_UART_ERROR_INVALID_CALLBACK;

    return HAL_ERROR;
  }

  __HAL_LOCK(huart);

  if (huart->gState == HAL_UART_STATE_READY)
  {
    switch (CallbackID)
    {
      case HAL_UART_TX_HALFCOMPLETE_CB_ID :
        huart->TxHalfCpltCallback = pCallback;
        break;

      case HAL_UART_TX_COMPLETE_CB_ID :
        huart->TxCpltCallback = pCallback;
        break;

      case HAL_UART_RX_HALFCOMPLETE_CB_ID :
        huart->RxHalfCpltCallback = pCallback;
        break;

      case HAL_UART_RX_COMPLETE_CB_ID :
        huart->RxCpltCallback = pCallback;
        break;

      case HAL_UART_ERROR_CB_ID :
        huart->ErrorCallback = pCallback;
        break;

      case HAL_UART_ABORT_COMPLETE_CB_ID :
        huart->AbortCpltCallback = pCallback;
        break;

      case HAL_UART_ABORT_TRANSMIT_COMPLETE_CB_ID :
        huart->AbortTransmitCpltCallback = pCallback;
        break;

      case HAL_UART_ABORT_RECEIVE_COMPLETE_CB_ID :
        huart->AbortReceiveCpltCallback = pCallback;
        break;

      case HAL_UART_WAKEUP_CB_ID :
        huart->WakeupCallback = pCallback;
        break;

#if defined(USART_CR1_FIFOEN)
      case HAL_UART_RX_FIFO_FULL_CB_ID :
        huart->RxFifoFullCallback = pCallback;
        break;

      case HAL_UART_TX_FIFO_EMPTY_CB_ID :
        huart->TxFifoEmptyCallback = pCallback;
        break;
#endif /* USART_CR1_FIFOEN */

      case HAL_UART_MSPINIT_CB_ID :
        huart->MspInitCallback = pCallback;
        break;

      case HAL_UART_MSPDEINIT_CB_ID :
        huart->MspDeInitCallback = pCallback;
        break;

      default :
        huart->ErrorCode |= HAL_UART_ERROR_INVALID_CALLBACK;

        status =  HAL_ERROR;
        break;
    }
  }
  else if (huart->gState == HAL_UART_STATE_RESET)
  {
    switch (CallbackID)
    {
      case HAL_UART_MSPINIT_CB_ID :
        huart->MspInitCallback = pCallback;
        break;

      case HAL_UART_MSPDEINIT_CB_ID :
        huart->MspDeInitCallback = pCallback;
        break;

      default :
        huart->ErrorCode |= HAL_UART_ERROR_INVALID_CALLBACK;

        status =  HAL_ERROR;
        break;
    }
  }
  else
  {
    huart->ErrorCode |= HAL_UART_ERROR_INVALID_CALLBACK;

    status =  HAL_ERROR;
  }

  __HAL_UNLOCK(huart);

  return status;
}