HAL_StatusTypeDef HAL_I2C_RegisterCallback()

in CMake-armcc/Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_i2c.c [679:784]
77 lines of code
17 McCabe index (conditional complexity)

HAL_StatusTypeDef HAL_I2C_RegisterCallback(I2C_HandleTypeDef *hi2c, HAL_I2C_CallbackIDTypeDef CallbackID,
                                           pI2C_CallbackTypeDef pCallback)
{
  HAL_StatusTypeDef status = HAL_OK;

  if (pCallback == NULL)
  {
    /* Update the error code */
    hi2c->ErrorCode |= HAL_I2C_ERROR_INVALID_CALLBACK;

    return HAL_ERROR;
  }
  /* Process locked */
  __HAL_LOCK(hi2c);

  if (HAL_I2C_STATE_READY == hi2c->State)
  {
    switch (CallbackID)
    {
      case HAL_I2C_MASTER_TX_COMPLETE_CB_ID :
        hi2c->MasterTxCpltCallback = pCallback;
        break;

      case HAL_I2C_MASTER_RX_COMPLETE_CB_ID :
        hi2c->MasterRxCpltCallback = pCallback;
        break;

      case HAL_I2C_SLAVE_TX_COMPLETE_CB_ID :
        hi2c->SlaveTxCpltCallback = pCallback;
        break;

      case HAL_I2C_SLAVE_RX_COMPLETE_CB_ID :
        hi2c->SlaveRxCpltCallback = pCallback;
        break;

      case HAL_I2C_LISTEN_COMPLETE_CB_ID :
        hi2c->ListenCpltCallback = pCallback;
        break;

      case HAL_I2C_MEM_TX_COMPLETE_CB_ID :
        hi2c->MemTxCpltCallback = pCallback;
        break;

      case HAL_I2C_MEM_RX_COMPLETE_CB_ID :
        hi2c->MemRxCpltCallback = pCallback;
        break;

      case HAL_I2C_ERROR_CB_ID :
        hi2c->ErrorCallback = pCallback;
        break;

      case HAL_I2C_ABORT_CB_ID :
        hi2c->AbortCpltCallback = pCallback;
        break;

      case HAL_I2C_MSPINIT_CB_ID :
        hi2c->MspInitCallback = pCallback;
        break;

      case HAL_I2C_MSPDEINIT_CB_ID :
        hi2c->MspDeInitCallback = pCallback;
        break;

      default :
        /* Update the error code */
        hi2c->ErrorCode |= HAL_I2C_ERROR_INVALID_CALLBACK;

        /* Return error status */
        status =  HAL_ERROR;
        break;
    }
  }
  else if (HAL_I2C_STATE_RESET == hi2c->State)
  {
    switch (CallbackID)
    {
      case HAL_I2C_MSPINIT_CB_ID :
        hi2c->MspInitCallback = pCallback;
        break;

      case HAL_I2C_MSPDEINIT_CB_ID :
        hi2c->MspDeInitCallback = pCallback;
        break;

      default :
        /* Update the error code */
        hi2c->ErrorCode |= HAL_I2C_ERROR_INVALID_CALLBACK;

        /* Return error status */
        status =  HAL_ERROR;
        break;
    }
  }
  else
  {
    /* Update the error code */
    hi2c->ErrorCode |= HAL_I2C_ERROR_INVALID_CALLBACK;

    /* Return error status */
    status =  HAL_ERROR;
  }

  /* Release Lock */
  __HAL_UNLOCK(hi2c);
  return status;
}