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/**

  ******************************************************************************

  * @file    stm32f0xx_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 Reference manual for connection between peripherals

       and DMA requests .

   (#) For a given Channel, program the required configuration through the following parameters:  

       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_Channel_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.

     [..]

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

  @endverbatim

  ******************************************************************************

  * @attention

  *

  * <h2><center>&copy; Copyright (c) 2016 STMicroelectronics.

  * All rights reserved.</center></h2>

  *

  * This software component is licensed by ST under BSD 3-Clause license,

  * the "License"; You may not use this file except in compliance with the

  * License. You may obtain a copy of the License at:

  *                        opensource.org/licenses/BSD-3-Clause

  *

  ******************************************************************************

  */

/* Includes ------------------------------------------------------------------*/

#include "stm32f0xx_hal.h"

/** @addtogroup STM32F0xx_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);

static void DMA_CalcBaseAndBitshift(DMA_HandleTypeDef *hdma);

/**

  * @}

  */

/* 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(NULL == hdma)

  {

    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));

  /* 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, 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;  

  /* Initialize DmaBaseAddress and ChannelIndex parameters used

     by HAL_DMA_IRQHandler() and HAL_DMA_PollForTransfer() */

  DMA_CalcBaseAndBitshift(hdma);

  /* 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(NULL == hdma)

  {

    return HAL_ERROR;

  }

  /* Check the parameters */

  assert_param(IS_DMA_ALL_INSTANCE(hdma->Instance));

  /* Disable the selected DMA Channelx */

  hdma->Instance->CCR &= ~DMA_CCR_EN;

  /* 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;

/* Get DMA Base Address */  

  DMA_CalcBaseAndBitshift(hdma);

  /* Clear all flags */

  hdma->DmaBaseAddress->IFCR = DMA_FLAG_GL1 << hdma->ChannelIndex;

  /* Clean 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   I/O 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 */

        hdma->Instance->CCR &= ~DMA_CCR_EN;  

        /* Configure the source, destination address and the data length */

        DMA_SetConfig(hdma, SrcAddress, DstAddress, DataLength);

        /* Enable the Peripheral */

        hdma->Instance->CCR |= DMA_CCR_EN;  

  }

  else

  {

        /* Process Unlocked */

        __HAL_UNLOCK(hdma);

        /* Remain BUSY */

        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 */

        hdma->Instance->CCR &= ~DMA_CCR_EN;

        /* Configure the source, destination address and the data length */  

        DMA_SetConfig(hdma, SrcAddress, DstAddress, DataLength);

        /* Enable the transfer complete, & transfer error interrupts */

        /* Half transfer interrupt is optional: enable it only if associated callback is available */

    if(NULL != hdma->XferHalfCpltCallback )

    {

      hdma->Instance->CCR |= (DMA_IT_TC | DMA_IT_HT | DMA_IT_TE);

    }

        else

        {

                hdma->Instance->CCR |= (DMA_IT_TC | DMA_IT_TE);

                hdma->Instance->CCR &= ~DMA_IT_HT;

        }

        /* Enable the Peripheral */

        hdma->Instance->CCR |= DMA_CCR_EN;

  }

  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)

{

  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 */

    hdma->Instance->CCR &= ~(DMA_IT_TC | DMA_IT_HT | DMA_IT_TE);

    /* Disable the channel */

    hdma->Instance->CCR &= ~DMA_CCR_EN;

    /* Clear all flags */

    hdma->DmaBaseAddress->IFCR = (DMA_FLAG_GL1 << hdma->ChannelIndex);

  }

  /* Change the DMA state*/

  hdma->State = HAL_DMA_STATE_READY;

  /* Process Unlocked */

  __HAL_UNLOCK(hdma);

  return HAL_OK;

}

/**

  * @brief  Abort the DMA Transfer in Interrupt mode.

  * @param  hdma  pointer to a DMA_HandleTypeDef structure that contains

  *               the configuration information for the specified DMA Stream.

  * @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 */

    hdma->Instance->CCR &= ~(DMA_IT_TC | DMA_IT_HT | DMA_IT_TE);

    /* Disable the channel */

    hdma->Instance->CCR &= ~DMA_CCR_EN;

    /* Clear all flags */

    hdma->DmaBaseAddress->IFCR = DMA_FLAG_GL1 << hdma->ChannelIndex;

    /* 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(HAL_DMA_FULL_TRANSFER == CompleteLevel)

  {

    /* Transfer Complete flag */

    temp = DMA_FLAG_TC1 << hdma->ChannelIndex;

  }

  else

  {

    /* Half Transfer Complete flag */

    temp = DMA_FLAG_HT1 << hdma->ChannelIndex;

  }

  /* Get tick */

  tickstart = HAL_GetTick();

  while(RESET == (hdma->DmaBaseAddress->ISR & temp))

  {

    if(RESET != (hdma->DmaBaseAddress->ISR & (DMA_FLAG_TE1 << hdma->ChannelIndex)))

    {      

      /* When a DMA transfer error occurs */

      /* A hardware clear of its EN bits is performed */

      /* Clear all flags */

      hdma->DmaBaseAddress->IFCR = DMA_FLAG_GL1 << 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);

      return HAL_ERROR;      

    }      

    /* Check for the Timeout */

    if(Timeout != HAL_MAX_DELAY)

    {

      if((Timeout == 0U) || ((HAL_GetTick() - tickstart) > Timeout))

      {

        /* Update error code */

        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(HAL_DMA_FULL_TRANSFER == CompleteLevel)

  {

    /* Clear the transfer complete flag */

    hdma->DmaBaseAddress->IFCR = DMA_FLAG_TC1 << hdma->ChannelIndex;

    /* 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 */

    hdma->DmaBaseAddress->IFCR = DMA_FLAG_HT1 << hdma->ChannelIndex;

  }

  /* Process unlocked */

  __HAL_UNLOCK(hdma);  

  return HAL_OK;

}

/**

  * @brief  Handle 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 ((RESET != (flag_it & (DMA_FLAG_HT1 << hdma->ChannelIndex))) && (RESET != (source_it & DMA_IT_HT)))

  {

        /* 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 */

                hdma->Instance->CCR &= ~DMA_IT_HT;

        }

        /* Clear the half transfer complete flag */

        hdma->DmaBaseAddress->IFCR = DMA_FLAG_HT1 << hdma->ChannelIndex;

        /* DMA peripheral state is not updated in Half Transfer */

        /* State is updated only in Transfer Complete case */

        if(hdma->XferHalfCpltCallback != NULL)

        {

                /* Half transfer callback */

                hdma->XferHalfCpltCallback(hdma);

        }

  }

  /* Transfer Complete Interrupt management ***********************************/

  else if ((RESET != (flag_it & (DMA_FLAG_TC1 << hdma->ChannelIndex))) && (RESET != (source_it & DMA_IT_TC)))

  {

        if((hdma->Instance->CCR & DMA_CCR_CIRC) == 0U)

        {

                /* Disable the transfer complete  & transfer error interrupts */

                /* if the DMA mode is not CIRCULAR */

                hdma->Instance->CCR &= ~(DMA_IT_TC | DMA_IT_TE);

                /* Change the DMA state */

                hdma->State = HAL_DMA_STATE_READY;

        }

        /* Clear the transfer complete flag */

        hdma->DmaBaseAddress->IFCR = DMA_FLAG_TC1 << hdma->ChannelIndex;

        /* 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 */

    /* Then, disable all DMA interrupts */

    hdma->Instance->CCR &= ~(DMA_IT_TC | DMA_IT_HT | DMA_IT_TE);

    /* Clear all flags */

    hdma->DmaBaseAddress->IFCR = DMA_FLAG_GL1 << 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);

    }

   }

}  

/**

  * @brief  Register callbacks

  * @param  hdma                 pointer to a DMA_HandleTypeDef structure that contains

  *                               the configuration information for the specified DMA Stream.

  * @param  CallbackID           User Callback identifer

  *                               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 Stream.

  * @param  CallbackID           User Callback identifer

  *                               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 functions

 *  @brief    Peripheral State functions

 *

@verbatim  

 ===============================================================================

                    ##### State and Errors functions #####

 ===============================================================================  

    [..]

    This subsection provides functions allowing to

      (+) Check the DMA state

      (+) Get error code

@endverbatim

  * @{

  */  

/**

  * @brief  Returns the DMA 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 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  Set the DMA Transfer parameters.

  * @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_FLAG_GL1 << 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;

  }

}

/**

  * @brief  set the DMA base address and channel index depending on DMA instance

  * @param  hdma       pointer to a DMA_HandleTypeDef structure that contains

  *                     the configuration information for the specified DMA Stream.

  * @retval None

  */

static void DMA_CalcBaseAndBitshift(DMA_HandleTypeDef *hdma)

{

#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)) << 2U;

    hdma->DmaBaseAddress = DMA1;

  }

  else

  {

    /* DMA2 */

    hdma->ChannelIndex = (((uint32_t)hdma->Instance - (uint32_t)DMA2_Channel1) / ((uint32_t)DMA2_Channel2 - (uint32_t)DMA2_Channel1)) << 2U;

    hdma->DmaBaseAddress = DMA2;

  }

#else

  /* calculation of the channel index */

  /* DMA1 */

  hdma->ChannelIndex = (((uint32_t)hdma->Instance - (uint32_t)DMA1_Channel1) / ((uint32_t)DMA1_Channel2 - (uint32_t)DMA1_Channel1)) << 2U;

  hdma->DmaBaseAddress = DMA1;

#endif

}

/**

  * @}

  */

/**

  * @}

  */

#endif /* HAL_DMA_MODULE_ENABLED */

/**

  * @}

  */

  /**

  * @}

  */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/