/**
 ******************************************************************************
 * @file    stm32f1xx_hal_dma.c
 * @author  MCD Application Team
 * @brief   DMA HAL module driver.
 *         This file provides firmware functions to manage the following
 *         functionalities of the Direct Memory Access (DMA) peripheral:
 *           + Initialization and de-initialization functions
 *           + IO operation functions
 *           + Peripheral State and errors functions
 @verbatim
 ==============================================================================
 ##### How to use this driver #####
 ==============================================================================
 [..]
 (#) Enable and configure the peripheral to be connected to the DMA Channel
 (except for internal SRAM / FLASH memories: no initialization is 
 necessary). Please refer to the Reference manual for connection between peripherals
 and DMA requests.

 (#) For a given Channel, program the required configuration through the following parameters:
 Channel request, Transfer Direction, Source and Destination data formats,
 Circular or Normal mode, Channel Priority level, Source and Destination Increment mode
 using HAL_DMA_Init() function.

 (#) Use HAL_DMA_GetState() function to return the DMA state and HAL_DMA_GetError() in case of error 
 detection.
 
 (#) Use HAL_DMA_Abort() function to abort the current transfer
 
 -@-   In Memory-to-Memory transfer mode, Circular mode is not allowed.
 *** Polling mode IO operation ***
 =================================
 [..]
 (+) Use HAL_DMA_Start() to start DMA transfer after the configuration of Source
 address and destination address and the Length of data to be transferred
 (+) Use HAL_DMA_PollForTransfer() to poll for the end of current transfer, in this
 case a fixed Timeout can be configured by User depending from his application.

 *** Interrupt mode IO operation ***
 ===================================
 [..]
 (+) Configure the DMA interrupt priority using HAL_NVIC_SetPriority()
 (+) Enable the DMA IRQ handler using HAL_NVIC_EnableIRQ()
 (+) Use HAL_DMA_Start_IT() to start DMA transfer after the configuration of
 Source address and destination address and the Length of data to be transferred.
 In this case the DMA interrupt is configured
 (+) Use HAL_DMA_IRQHandler() called under DMA_IRQHandler() Interrupt subroutine
 (+) At the end of data transfer HAL_DMA_IRQHandler() function is executed and user can
 add his own function by customization of function pointer XferCpltCallback and
 XferErrorCallback (i.e. a member of DMA handle structure).

 *** DMA HAL driver macros list ***
 ============================================= 
 [..]
 Below the list of most used macros in DMA HAL driver.

 (+) __HAL_DMA_ENABLE: Enable the specified DMA Channel.
 (+) __HAL_DMA_DISABLE: Disable the specified DMA Channel.
 (+) __HAL_DMA_GET_FLAG: Get the DMA Channel pending flags.
 (+) __HAL_DMA_CLEAR_FLAG: Clear the DMA Channel pending flags.
 (+) __HAL_DMA_ENABLE_IT: Enable the specified DMA Channel interrupts.
 (+) __HAL_DMA_DISABLE_IT: Disable the specified DMA Channel interrupts.
 (+) __HAL_DMA_GET_IT_SOURCE: Check whether the specified DMA Channel interrupt has occurred or not. 

 [..] 
 (@) You can refer to the DMA HAL driver header file for more useful macros  

 @endverbatim
 ******************************************************************************
 * @attention
 *
 * Copyright (c) 2016 STMicroelectronics.
 * All rights reserved.
 *
 * This software is licensed under terms that can be found in the LICENSE file in
 * the root directory of this software component.
 * If no LICENSE file comes with this software, it is provided AS-IS.
 *
 ******************************************************************************
 */

/* Includes ------------------------------------------------------------------*/
#include "stm32f1xx_hal.h"

/** @addtogroup STM32F1xx_HAL_Driver
 * @{
 */

/** @defgroup DMA DMA
 * @brief DMA HAL module driver
 * @{
 */

#ifdef HAL_DMA_MODULE_ENABLED

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/** @defgroup DMA_Private_Functions DMA Private Functions
 * @{
 */
static void DMA_SetConfig(DMA_HandleTypeDef *hdma, uint32_t SrcAddress,
        uint32_t DstAddress, uint32_t DataLength);
/**
 * @}
 */

/* Exported functions ---------------------------------------------------------*/

/** @defgroup DMA_Exported_Functions DMA Exported Functions
 * @{
 */

/** @defgroup DMA_Exported_Functions_Group1 Initialization and de-initialization functions
 *  @brief   Initialization and de-initialization functions 
 *
 @verbatim
 ===============================================================================
 ##### Initialization and de-initialization functions  #####
 ===============================================================================
 [..]
 This section provides functions allowing to initialize the DMA Channel source
 and destination addresses, incrementation and data sizes, transfer direction, 
 circular/normal mode selection, memory-to-memory mode selection and Channel priority value.
 [..]
 The HAL_DMA_Init() function follows the DMA configuration procedures as described in
 reference manual.  

 @endverbatim
 * @{
 */

/**
 * @brief  Initialize the DMA according to the specified
 *         parameters in the DMA_InitTypeDef and initialize the associated handle.
 * @param  hdma: Pointer to a DMA_HandleTypeDef structure that contains
 *               the configuration information for the specified DMA Channel.
 * @retval HAL status
 */
HAL_StatusTypeDef HAL_DMA_Init(DMA_HandleTypeDef *hdma)
{
    uint32_t tmp = 0U;

    /* Check the DMA handle allocation */
    if (hdma == NULL) {
        return HAL_ERROR;
    }

    /* Check the parameters */
    assert_param(IS_DMA_ALL_INSTANCE(hdma->Instance));
    assert_param(IS_DMA_DIRECTION(hdma->Init.Direction));
    assert_param(IS_DMA_PERIPHERAL_INC_STATE(hdma->Init.PeriphInc));
    assert_param(IS_DMA_MEMORY_INC_STATE(hdma->Init.MemInc));
    assert_param(IS_DMA_PERIPHERAL_DATA_SIZE(hdma->Init.PeriphDataAlignment));
    assert_param(IS_DMA_MEMORY_DATA_SIZE(hdma->Init.MemDataAlignment));
    assert_param(IS_DMA_MODE(hdma->Init.Mode));
    assert_param(IS_DMA_PRIORITY(hdma->Init.Priority));

#if defined (DMA2)
  /* calculation of the channel index */
  if ((uint32_t)(hdma->Instance) < (uint32_t)(DMA2_Channel1))
  {
    /* DMA1 */
    hdma->ChannelIndex = (((uint32_t)hdma->Instance - (uint32_t)DMA1_Channel1) / ((uint32_t)DMA1_Channel2 - (uint32_t)DMA1_Channel1)) << 2;
    hdma->DmaBaseAddress = DMA1;
  }
  else 
  {
    /* DMA2 */
    hdma->ChannelIndex = (((uint32_t)hdma->Instance - (uint32_t)DMA2_Channel1) / ((uint32_t)DMA2_Channel2 - (uint32_t)DMA2_Channel1)) << 2;
    hdma->DmaBaseAddress = DMA2;
  }
#else
    /* DMA1 */
    hdma->ChannelIndex = (((uint32_t) hdma->Instance - (uint32_t) DMA1_Channel1)
            / ((uint32_t) DMA1_Channel2 - (uint32_t) DMA1_Channel1)) << 2;
    hdma->DmaBaseAddress = DMA1;
#endif /* DMA2 */

    /* Change DMA peripheral state */
    hdma->State = HAL_DMA_STATE_BUSY;

    /* Get the CR register value */
    tmp = hdma->Instance->CCR;

    /* Clear PL, MSIZE, PSIZE, MINC, PINC, CIRC and DIR bits */
    tmp &= ((uint32_t) ~(DMA_CCR_PL | DMA_CCR_MSIZE | DMA_CCR_PSIZE |
    DMA_CCR_MINC | DMA_CCR_PINC | DMA_CCR_CIRC |
    DMA_CCR_DIR));

    /* Prepare the DMA Channel configuration */
    tmp |= hdma->Init.Direction | hdma->Init.PeriphInc | hdma->Init.MemInc
            | hdma->Init.PeriphDataAlignment | hdma->Init.MemDataAlignment
            | hdma->Init.Mode | hdma->Init.Priority;

    /* Write to DMA Channel CR register */
    hdma->Instance->CCR = tmp;

    /* Initialise the error code */
    hdma->ErrorCode = HAL_DMA_ERROR_NONE;

    /* Initialize the DMA state*/
    hdma->State = HAL_DMA_STATE_READY;
    /* Allocate lock resource and initialize it */
    hdma->Lock = HAL_UNLOCKED;

    return HAL_OK;
}

/**
 * @brief  DeInitialize the DMA peripheral.
 * @param  hdma: pointer to a DMA_HandleTypeDef structure that contains
 *               the configuration information for the specified DMA Channel.
 * @retval HAL status
 */
HAL_StatusTypeDef HAL_DMA_DeInit(DMA_HandleTypeDef *hdma)
{
    /* Check the DMA handle allocation */
    if (hdma == NULL) {
        return HAL_ERROR;
    }

    /* Check the parameters */
    assert_param(IS_DMA_ALL_INSTANCE(hdma->Instance));

    /* Disable the selected DMA Channelx */
    __HAL_DMA_DISABLE(hdma);

    /* Reset DMA Channel control register */
    hdma->Instance->CCR = 0U;

    /* Reset DMA Channel Number of Data to Transfer register */
    hdma->Instance->CNDTR = 0U;

    /* Reset DMA Channel peripheral address register */
    hdma->Instance->CPAR = 0U;

    /* Reset DMA Channel memory address register */
    hdma->Instance->CMAR = 0U;

#if defined (DMA2)
  /* calculation of the channel index */
  if ((uint32_t)(hdma->Instance) < (uint32_t)(DMA2_Channel1))
  {
    /* DMA1 */
    hdma->ChannelIndex = (((uint32_t)hdma->Instance - (uint32_t)DMA1_Channel1) / ((uint32_t)DMA1_Channel2 - (uint32_t)DMA1_Channel1)) << 2;
    hdma->DmaBaseAddress = DMA1;
  }
  else
  {
    /* DMA2 */
    hdma->ChannelIndex = (((uint32_t)hdma->Instance - (uint32_t)DMA2_Channel1) / ((uint32_t)DMA2_Channel2 - (uint32_t)DMA2_Channel1)) << 2;
    hdma->DmaBaseAddress = DMA2;
  }
#else
    /* DMA1 */
    hdma->ChannelIndex = (((uint32_t) hdma->Instance - (uint32_t) DMA1_Channel1)
            / ((uint32_t) DMA1_Channel2 - (uint32_t) DMA1_Channel1)) << 2;
    hdma->DmaBaseAddress = DMA1;
#endif /* DMA2 */

    /* Clear all flags */
    hdma->DmaBaseAddress->IFCR = (DMA_ISR_GIF1 << (hdma->ChannelIndex));

    /* Clean all callbacks */
    hdma->XferCpltCallback = NULL;
    hdma->XferHalfCpltCallback = NULL;
    hdma->XferErrorCallback = NULL;
    hdma->XferAbortCallback = NULL;

    /* Reset the error code */
    hdma->ErrorCode = HAL_DMA_ERROR_NONE;

    /* Reset the DMA state */
    hdma->State = HAL_DMA_STATE_RESET;

    /* Release Lock */
    __HAL_UNLOCK(hdma);

    return HAL_OK;
}

/**
 * @}
 */

/** @defgroup DMA_Exported_Functions_Group2 Input and Output operation functions
 *  @brief   Input and Output operation functions
 *
 @verbatim
 ===============================================================================
 #####  IO operation functions  #####
 ===============================================================================
 [..]  This section provides functions allowing to:
 (+) Configure the source, destination address and data length and Start DMA transfer
 (+) Configure the source, destination address and data length and
 Start DMA transfer with interrupt
 (+) Abort DMA transfer
 (+) Poll for transfer complete
 (+) Handle DMA interrupt request

 @endverbatim
 * @{
 */

/**
 * @brief  Start the DMA Transfer.
 * @param  hdma: pointer to a DMA_HandleTypeDef structure that contains
 *               the configuration information for the specified DMA Channel.
 * @param  SrcAddress: The source memory Buffer address
 * @param  DstAddress: The destination memory Buffer address
 * @param  DataLength: The length of data to be transferred from source to destination
 * @retval HAL status
 */
HAL_StatusTypeDef HAL_DMA_Start(DMA_HandleTypeDef *hdma, uint32_t SrcAddress,
        uint32_t DstAddress, uint32_t DataLength)
{
    HAL_StatusTypeDef status = HAL_OK;

    /* Check the parameters */
    assert_param(IS_DMA_BUFFER_SIZE(DataLength));

    /* Process locked */
    __HAL_LOCK(hdma);

    if (HAL_DMA_STATE_READY == hdma->State) {
        /* Change DMA peripheral state */
        hdma->State = HAL_DMA_STATE_BUSY;
        hdma->ErrorCode = HAL_DMA_ERROR_NONE;

        /* Disable the peripheral */
        __HAL_DMA_DISABLE(hdma);

        /* Configure the source, destination address and the data length & clear flags*/
        DMA_SetConfig(hdma, SrcAddress, DstAddress, DataLength);

        /* Enable the Peripheral */
        __HAL_DMA_ENABLE(hdma);
    } else {
        /* Process Unlocked */
        __HAL_UNLOCK(hdma);
        status = HAL_BUSY;
    }
    return status;
}

/**
 * @brief  Start the DMA Transfer with interrupt enabled.
 * @param  hdma: pointer to a DMA_HandleTypeDef structure that contains
 *               the configuration information for the specified DMA Channel.
 * @param  SrcAddress: The source memory Buffer address
 * @param  DstAddress: The destination memory Buffer address
 * @param  DataLength: The length of data to be transferred from source to destination
 * @retval HAL status
 */
HAL_StatusTypeDef HAL_DMA_Start_IT(DMA_HandleTypeDef *hdma, uint32_t SrcAddress,
        uint32_t DstAddress, uint32_t DataLength)
{
    HAL_StatusTypeDef status = HAL_OK;

    /* Check the parameters */
    assert_param(IS_DMA_BUFFER_SIZE(DataLength));

    /* Process locked */
    __HAL_LOCK(hdma);

    if (HAL_DMA_STATE_READY == hdma->State) {
        /* Change DMA peripheral state */
        hdma->State = HAL_DMA_STATE_BUSY;
        hdma->ErrorCode = HAL_DMA_ERROR_NONE;

        /* Disable the peripheral */
        __HAL_DMA_DISABLE(hdma);

        /* Configure the source, destination address and the data length & clear flags*/
        DMA_SetConfig(hdma, SrcAddress, DstAddress, DataLength);

        /* Enable the transfer complete interrupt */
        /* Enable the transfer Error interrupt */
        if (NULL != hdma->XferHalfCpltCallback) {
            /* Enable the Half transfer complete interrupt as well */
            __HAL_DMA_ENABLE_IT(hdma, (DMA_IT_TC | DMA_IT_HT | DMA_IT_TE));
        } else {
            __HAL_DMA_DISABLE_IT(hdma, DMA_IT_HT);
            __HAL_DMA_ENABLE_IT(hdma, (DMA_IT_TC | DMA_IT_TE));
        }
        /* Enable the Peripheral */
        __HAL_DMA_ENABLE(hdma);
    } else {
        /* Process Unlocked */
        __HAL_UNLOCK(hdma);

        /* Remain BUSY */
        status = HAL_BUSY;
    }
    return status;
}

/**
 * @brief  Abort the DMA Transfer.
 * @param  hdma: pointer to a DMA_HandleTypeDef structure that contains
 *               the configuration information for the specified DMA Channel.
 * @retval HAL status
 */
HAL_StatusTypeDef HAL_DMA_Abort(DMA_HandleTypeDef *hdma)
{
    HAL_StatusTypeDef status = HAL_OK;

    if (hdma->State != HAL_DMA_STATE_BUSY) {
        /* no transfer ongoing */
        hdma->ErrorCode = HAL_DMA_ERROR_NO_XFER;

        /* Process Unlocked */
        __HAL_UNLOCK(hdma);

        return HAL_ERROR;
    } else

    {
        /* Disable DMA IT */
        __HAL_DMA_DISABLE_IT(hdma, (DMA_IT_TC | DMA_IT_HT | DMA_IT_TE));

        /* Disable the channel */
        __HAL_DMA_DISABLE(hdma);

        /* Clear all flags */
        hdma->DmaBaseAddress->IFCR = (DMA_ISR_GIF1 << hdma->ChannelIndex);
    }
    /* Change the DMA state */
    hdma->State = HAL_DMA_STATE_READY;

    /* Process Unlocked */
    __HAL_UNLOCK(hdma);

    return status;
}

/**
 * @brief  Aborts the DMA Transfer in Interrupt mode.
 * @param  hdma  : pointer to a DMA_HandleTypeDef structure that contains
 *                 the configuration information for the specified DMA Channel.
 * @retval HAL status
 */
HAL_StatusTypeDef HAL_DMA_Abort_IT(DMA_HandleTypeDef *hdma)
{
    HAL_StatusTypeDef status = HAL_OK;

    if (HAL_DMA_STATE_BUSY != hdma->State) {
        /* no transfer ongoing */
        hdma->ErrorCode = HAL_DMA_ERROR_NO_XFER;

        status = HAL_ERROR;
    } else {
        /* Disable DMA IT */
        __HAL_DMA_DISABLE_IT(hdma, (DMA_IT_TC | DMA_IT_HT | DMA_IT_TE));

        /* Disable the channel */
        __HAL_DMA_DISABLE(hdma);

        /* Clear all flags */
        __HAL_DMA_CLEAR_FLAG(hdma, __HAL_DMA_GET_GI_FLAG_INDEX(hdma));

        /* Change the DMA state */
        hdma->State = HAL_DMA_STATE_READY;

        /* Process Unlocked */
        __HAL_UNLOCK(hdma);

        /* Call User Abort callback */
        if (hdma->XferAbortCallback != NULL) {
            hdma->XferAbortCallback(hdma);
        }
    }
    return status;
}

/**
 * @brief  Polling for transfer complete.
 * @param  hdma:    pointer to a DMA_HandleTypeDef structure that contains
 *                  the configuration information for the specified DMA Channel.
 * @param  CompleteLevel: Specifies the DMA level complete.
 * @param  Timeout:       Timeout duration.
 * @retval HAL status
 */
HAL_StatusTypeDef HAL_DMA_PollForTransfer(DMA_HandleTypeDef *hdma,
        uint32_t CompleteLevel, uint32_t Timeout)
{
    uint32_t temp;
    uint32_t tickstart = 0U;

    if (HAL_DMA_STATE_BUSY != hdma->State) {
        /* no transfer ongoing */
        hdma->ErrorCode = HAL_DMA_ERROR_NO_XFER;
        __HAL_UNLOCK(hdma);
        return HAL_ERROR;
    }

    /* Polling mode not supported in circular mode */
    if (RESET != (hdma->Instance->CCR & DMA_CCR_CIRC)) {
        hdma->ErrorCode = HAL_DMA_ERROR_NOT_SUPPORTED;
        return HAL_ERROR;
    }

    /* Get the level transfer complete flag */
    if (CompleteLevel == HAL_DMA_FULL_TRANSFER) {
        /* Transfer Complete flag */
        temp = __HAL_DMA_GET_TC_FLAG_INDEX(hdma);
    } else {
        /* Half Transfer Complete flag */
        temp = __HAL_DMA_GET_HT_FLAG_INDEX(hdma);
    }

    /* Get tick */
    tickstart = HAL_GetTick();

    while (__HAL_DMA_GET_FLAG(hdma, temp) == RESET) {
        if ((__HAL_DMA_GET_FLAG(hdma, __HAL_DMA_GET_TE_FLAG_INDEX(hdma))
                != RESET)) {
            /* When a DMA transfer error occurs */
            /* A hardware clear of its EN bits is performed */
            /* Clear all flags */
            hdma->DmaBaseAddress->IFCR = (DMA_ISR_GIF1 << hdma->ChannelIndex);

            /* Update error code */
            SET_BIT(hdma->ErrorCode, HAL_DMA_ERROR_TE);

            /* Change the DMA state */
            hdma->State = HAL_DMA_STATE_READY;

            /* Process Unlocked */
            __HAL_UNLOCK(hdma);

            return HAL_ERROR;
        }
        /* Check for the Timeout */
        if (Timeout != HAL_MAX_DELAY) {
            if ((Timeout == 0U) || ((HAL_GetTick() - tickstart) > Timeout)) {
                /* Update error code */
                SET_BIT(hdma->ErrorCode, HAL_DMA_ERROR_TIMEOUT);

                /* Change the DMA state */
                hdma->State = HAL_DMA_STATE_READY;

                /* Process Unlocked */
                __HAL_UNLOCK(hdma);

                return HAL_ERROR;
            }
        }
    }

    if (CompleteLevel == HAL_DMA_FULL_TRANSFER) {
        /* Clear the transfer complete flag */
        __HAL_DMA_CLEAR_FLAG(hdma, __HAL_DMA_GET_TC_FLAG_INDEX(hdma));

        /* The selected Channelx EN bit is cleared (DMA is disabled and
         all transfers are complete) */
        hdma->State = HAL_DMA_STATE_READY;
    } else {
        /* Clear the half transfer complete flag */
        __HAL_DMA_CLEAR_FLAG(hdma, __HAL_DMA_GET_HT_FLAG_INDEX(hdma));
    }

    /* Process unlocked */
    __HAL_UNLOCK(hdma);

    return HAL_OK;
}

/**
 * @brief  Handles DMA interrupt request.
 * @param  hdma: pointer to a DMA_HandleTypeDef structure that contains
 *               the configuration information for the specified DMA Channel.  
 * @retval None
 */
void HAL_DMA_IRQHandler(DMA_HandleTypeDef *hdma)
{
    uint32_t flag_it = hdma->DmaBaseAddress->ISR;
    uint32_t source_it = hdma->Instance->CCR;

    /* Half Transfer Complete Interrupt management ******************************/
    if (((flag_it & (DMA_FLAG_HT1 << hdma->ChannelIndex)) != RESET)
            && ((source_it & DMA_IT_HT) != RESET)) {
        /* Disable the half transfer interrupt if the DMA mode is not CIRCULAR */
        if ((hdma->Instance->CCR & DMA_CCR_CIRC) == 0U) {
            /* Disable the half transfer interrupt */
            __HAL_DMA_DISABLE_IT(hdma, DMA_IT_HT);
        }
        /* Clear the half transfer complete flag */
        __HAL_DMA_CLEAR_FLAG(hdma, __HAL_DMA_GET_HT_FLAG_INDEX(hdma));

        /* DMA peripheral state is not updated in Half Transfer */
        /* but in Transfer Complete case */

        if (hdma->XferHalfCpltCallback != NULL) {
            /* Half transfer callback */
            hdma->XferHalfCpltCallback(hdma);
        }
    }

    /* Transfer Complete Interrupt management ***********************************/
    else if (((flag_it & (DMA_FLAG_TC1 << hdma->ChannelIndex)) != RESET)
            && ((source_it & DMA_IT_TC) != RESET)) {
        if ((hdma->Instance->CCR & DMA_CCR_CIRC) == 0U) {
            /* Disable the transfer complete and error interrupt */
            __HAL_DMA_DISABLE_IT(hdma, DMA_IT_TE | DMA_IT_TC);

            /* Change the DMA state */
            hdma->State = HAL_DMA_STATE_READY;
        }
        /* Clear the transfer complete flag */
        __HAL_DMA_CLEAR_FLAG(hdma, __HAL_DMA_GET_TC_FLAG_INDEX(hdma));

        /* Process Unlocked */
        __HAL_UNLOCK(hdma);

        if (hdma->XferCpltCallback != NULL) {
            /* Transfer complete callback */
            hdma->XferCpltCallback(hdma);
        }
    }

    /* Transfer Error Interrupt management **************************************/
    else if ((RESET != (flag_it & (DMA_FLAG_TE1 << hdma->ChannelIndex)))
            && (RESET != (source_it & DMA_IT_TE))) {
        /* When a DMA transfer error occurs */
        /* A hardware clear of its EN bits is performed */
        /* Disable ALL DMA IT */
        __HAL_DMA_DISABLE_IT(hdma, (DMA_IT_TC | DMA_IT_HT | DMA_IT_TE));

        /* Clear all flags */
        hdma->DmaBaseAddress->IFCR = (DMA_ISR_GIF1 << hdma->ChannelIndex);

        /* Update error code */
        hdma->ErrorCode = HAL_DMA_ERROR_TE;

        /* Change the DMA state */
        hdma->State = HAL_DMA_STATE_READY;

        /* Process Unlocked */
        __HAL_UNLOCK(hdma);

        if (hdma->XferErrorCallback != NULL) {
            /* Transfer error callback */
            hdma->XferErrorCallback(hdma);
        }
    }
    return;
}

/**
 * @brief Register callbacks
 * @param hdma: pointer to a DMA_HandleTypeDef structure that contains
 *              the configuration information for the specified DMA Channel.
 * @param CallbackID: User Callback identifier
 *                    a HAL_DMA_CallbackIDTypeDef ENUM as parameter.
 * @param pCallback: pointer to private callback function which has pointer to 
 *                   a DMA_HandleTypeDef structure as parameter.
 * @retval HAL status
 */
HAL_StatusTypeDef HAL_DMA_RegisterCallback(DMA_HandleTypeDef *hdma,
        HAL_DMA_CallbackIDTypeDef CallbackID,
        void (*pCallback)(DMA_HandleTypeDef *_hdma))
{
    HAL_StatusTypeDef status = HAL_OK;

    /* Process locked */
    __HAL_LOCK(hdma);

    if (HAL_DMA_STATE_READY == hdma->State) {
        switch (CallbackID) {
        case HAL_DMA_XFER_CPLT_CB_ID:
            hdma->XferCpltCallback = pCallback;
            break;

        case HAL_DMA_XFER_HALFCPLT_CB_ID:
            hdma->XferHalfCpltCallback = pCallback;
            break;

        case HAL_DMA_XFER_ERROR_CB_ID:
            hdma->XferErrorCallback = pCallback;
            break;

        case HAL_DMA_XFER_ABORT_CB_ID:
            hdma->XferAbortCallback = pCallback;
            break;

        default:
            status = HAL_ERROR;
            break;
        }
    } else {
        status = HAL_ERROR;
    }

    /* Release Lock */
    __HAL_UNLOCK(hdma);

    return status;
}

/**
 * @brief UnRegister callbacks
 * @param hdma: pointer to a DMA_HandleTypeDef structure that contains
 *              the configuration information for the specified DMA Channel.
 * @param CallbackID: User Callback identifier
 *                    a HAL_DMA_CallbackIDTypeDef ENUM as parameter.
 * @retval HAL status
 */
HAL_StatusTypeDef HAL_DMA_UnRegisterCallback(DMA_HandleTypeDef *hdma,
        HAL_DMA_CallbackIDTypeDef CallbackID)
{
    HAL_StatusTypeDef status = HAL_OK;

    /* Process locked */
    __HAL_LOCK(hdma);

    if (HAL_DMA_STATE_READY == hdma->State) {
        switch (CallbackID) {
        case HAL_DMA_XFER_CPLT_CB_ID:
            hdma->XferCpltCallback = NULL;
            break;

        case HAL_DMA_XFER_HALFCPLT_CB_ID:
            hdma->XferHalfCpltCallback = NULL;
            break;

        case HAL_DMA_XFER_ERROR_CB_ID:
            hdma->XferErrorCallback = NULL;
            break;

        case HAL_DMA_XFER_ABORT_CB_ID:
            hdma->XferAbortCallback = NULL;
            break;

        case HAL_DMA_XFER_ALL_CB_ID:
            hdma->XferCpltCallback = NULL;
            hdma->XferHalfCpltCallback = NULL;
            hdma->XferErrorCallback = NULL;
            hdma->XferAbortCallback = NULL;
            break;

        default:
            status = HAL_ERROR;
            break;
        }
    } else {
        status = HAL_ERROR;
    }

    /* Release Lock */
    __HAL_UNLOCK(hdma);

    return status;
}

/**
 * @}
 */

/** @defgroup DMA_Exported_Functions_Group3 Peripheral State and Errors functions
 *  @brief    Peripheral State and Errors functions
 *
 @verbatim
 ===============================================================================
 ##### Peripheral State and Errors functions #####
 ===============================================================================  
 [..]
 This subsection provides functions allowing to
 (+) Check the DMA state
 (+) Get error code

 @endverbatim
 * @{
 */

/**
 * @brief  Return the DMA handle state.
 * @param  hdma: pointer to a DMA_HandleTypeDef structure that contains
 *               the configuration information for the specified DMA Channel.
 * @retval HAL state
 */
HAL_DMA_StateTypeDef HAL_DMA_GetState(DMA_HandleTypeDef *hdma)
{
    /* Return DMA handle state */
    return hdma->State;
}

/**
 * @brief  Return the DMA error code.
 * @param  hdma : pointer to a DMA_HandleTypeDef structure that contains
 *              the configuration information for the specified DMA Channel.
 * @retval DMA Error Code
 */
uint32_t HAL_DMA_GetError(DMA_HandleTypeDef *hdma)
{
    return hdma->ErrorCode;
}

/**
 * @}
 */

/**
 * @}
 */

/** @addtogroup DMA_Private_Functions
 * @{
 */

/**
 * @brief  Sets the DMA Transfer parameter.
 * @param  hdma:       pointer to a DMA_HandleTypeDef structure that contains
 *                     the configuration information for the specified DMA Channel.
 * @param  SrcAddress: The source memory Buffer address
 * @param  DstAddress: The destination memory Buffer address
 * @param  DataLength: The length of data to be transferred from source to destination
 * @retval HAL status
 */
static void DMA_SetConfig(DMA_HandleTypeDef *hdma, uint32_t SrcAddress,
        uint32_t DstAddress, uint32_t DataLength)
{
    /* Clear all flags */
    hdma->DmaBaseAddress->IFCR = (DMA_ISR_GIF1 << hdma->ChannelIndex);

    /* Configure DMA Channel data length */
    hdma->Instance->CNDTR = DataLength;

    /* Memory to Peripheral */
    if ((hdma->Init.Direction) == DMA_MEMORY_TO_PERIPH) {
        /* Configure DMA Channel destination address */
        hdma->Instance->CPAR = DstAddress;

        /* Configure DMA Channel source address */
        hdma->Instance->CMAR = SrcAddress;
    }
    /* Peripheral to Memory */
    else {
        /* Configure DMA Channel source address */
        hdma->Instance->CPAR = SrcAddress;

        /* Configure DMA Channel destination address */
        hdma->Instance->CMAR = DstAddress;
    }
}

/**
 * @}
 */

#endif /* HAL_DMA_MODULE_ENABLED */
/**
 * @}
 */

/**
 * @}
 */