static void I2C_ITSlaveCplt()

in CMake-armcc/Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_i2c.c [5645:5796]

• 102 lines of code
• 16 McCabe index (conditional complexity)

static void I2C_ITSlaveCplt(I2C_HandleTypeDef *hi2c, uint32_t ITFlags)
{
  uint32_t tmpcr1value = READ_REG(hi2c->Instance->CR1);
  uint32_t tmpITFlags = ITFlags;
  HAL_I2C_StateTypeDef tmpstate = hi2c->State;

  /* Clear STOP Flag */
  __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_STOPF);

  /* Disable Interrupts and Store Previous state */
  if ((tmpstate == HAL_I2C_STATE_BUSY_TX) || (tmpstate == HAL_I2C_STATE_BUSY_TX_LISTEN))
  {
    I2C_Disable_IRQ(hi2c, I2C_XFER_LISTEN_IT | I2C_XFER_TX_IT);
    hi2c->PreviousState = I2C_STATE_SLAVE_BUSY_TX;
  }
  else if ((tmpstate == HAL_I2C_STATE_BUSY_RX) || (tmpstate == HAL_I2C_STATE_BUSY_RX_LISTEN))
  {
    I2C_Disable_IRQ(hi2c, I2C_XFER_LISTEN_IT | I2C_XFER_RX_IT);
    hi2c->PreviousState = I2C_STATE_SLAVE_BUSY_RX;
  }
  else
  {
    /* Do nothing */
  }

  /* Disable Address Acknowledge */
  hi2c->Instance->CR2 |= I2C_CR2_NACK;

  /* Clear Configuration Register 2 */
  I2C_RESET_CR2(hi2c);

  /* Flush TX register */
  I2C_Flush_TXDR(hi2c);

  /* If a DMA is ongoing, Update handle size context */
  if (I2C_CHECK_IT_SOURCE(tmpcr1value, I2C_CR1_TXDMAEN) != RESET)
  {
    /* Disable DMA Request */
    hi2c->Instance->CR1 &= ~I2C_CR1_TXDMAEN;

    if (hi2c->hdmatx != NULL)
    {
      hi2c->XferCount = (uint16_t)__HAL_DMA_GET_COUNTER(hi2c->hdmatx);
    }
  }
  else if (I2C_CHECK_IT_SOURCE(tmpcr1value, I2C_CR1_RXDMAEN) != RESET)
  {
    /* Disable DMA Request */
    hi2c->Instance->CR1 &= ~I2C_CR1_RXDMAEN;

    if (hi2c->hdmarx != NULL)
    {
      hi2c->XferCount = (uint16_t)__HAL_DMA_GET_COUNTER(hi2c->hdmarx);
    }
  }
  else
  {
    /* Do nothing */
  }

  /* Store Last receive data if any */
  if (I2C_CHECK_FLAG(tmpITFlags, I2C_FLAG_RXNE) != RESET)
  {
    /* Remove RXNE flag on temporary variable as read done */
    tmpITFlags &= ~I2C_FLAG_RXNE;

    /* Read data from RXDR */
    *hi2c->pBuffPtr = (uint8_t)hi2c->Instance->RXDR;

    /* Increment Buffer pointer */
    hi2c->pBuffPtr++;

    if ((hi2c->XferSize > 0U))
    {
      hi2c->XferSize--;
      hi2c->XferCount--;
    }
  }

  /* All data are not transferred, so set error code accordingly */
  if (hi2c->XferCount != 0U)
  {
    /* Set ErrorCode corresponding to a Non-Acknowledge */
    hi2c->ErrorCode |= HAL_I2C_ERROR_AF;
  }

  hi2c->Mode = HAL_I2C_MODE_NONE;
  hi2c->XferISR = NULL;

  if (hi2c->ErrorCode != HAL_I2C_ERROR_NONE)
  {
    /* Call the corresponding callback to inform upper layer of End of Transfer */
    I2C_ITError(hi2c, hi2c->ErrorCode);

    /* Call the Listen Complete callback, to inform upper layer of the end of Listen usecase */
    if (hi2c->State == HAL_I2C_STATE_LISTEN)
    {
      /* Call I2C Listen complete process */
      I2C_ITListenCplt(hi2c, tmpITFlags);
    }
  }
  else if (hi2c->XferOptions != I2C_NO_OPTION_FRAME)
  {
    /* Call the Sequential Complete callback, to inform upper layer of the end of Transfer */
    I2C_ITSlaveSeqCplt(hi2c);

    hi2c->XferOptions = I2C_NO_OPTION_FRAME;
    hi2c->State = HAL_I2C_STATE_READY;
    hi2c->PreviousState = I2C_STATE_NONE;

    /* Process Unlocked */
    __HAL_UNLOCK(hi2c);

    /* Call the Listen Complete callback, to inform upper layer of the end of Listen usecase */
#if (USE_HAL_I2C_REGISTER_CALLBACKS == 1)
    hi2c->ListenCpltCallback(hi2c);
#else
    HAL_I2C_ListenCpltCallback(hi2c);
#endif /* USE_HAL_I2C_REGISTER_CALLBACKS */
  }
  /* Call the corresponding callback to inform upper layer of End of Transfer */
  else if (hi2c->State == HAL_I2C_STATE_BUSY_RX)
  {
    hi2c->State = HAL_I2C_STATE_READY;
    hi2c->PreviousState = I2C_STATE_NONE;

    /* Process Unlocked */
    __HAL_UNLOCK(hi2c);

    /* Call the corresponding callback to inform upper layer of End of Transfer */
#if (USE_HAL_I2C_REGISTER_CALLBACKS == 1)
    hi2c->SlaveRxCpltCallback(hi2c);
#else
    HAL_I2C_SlaveRxCpltCallback(hi2c);
#endif /* USE_HAL_I2C_REGISTER_CALLBACKS */
  }
  else
  {
    hi2c->State = HAL_I2C_STATE_READY;
    hi2c->PreviousState = I2C_STATE_NONE;

    /* Process Unlocked */
    __HAL_UNLOCK(hi2c);

    /* Call the corresponding callback to inform upper layer of End of Transfer */
#if (USE_HAL_I2C_REGISTER_CALLBACKS == 1)
    hi2c->SlaveTxCpltCallback(hi2c);
#else
    HAL_I2C_SlaveTxCpltCallback(hi2c);
#endif /* USE_HAL_I2C_REGISTER_CALLBACKS */
  }
}