text: /**
    ******************************************************************************
    * @file    stm32h7xx_hal_sd_ex.c
    * @author  MCD Application Team
    * @brief   SD card Extended HAL module driver.
    *          This file provides firmware functions to manage the following 
    *          functionalities of the Secure Digital (SD) peripheral:
    *           + Extended features functions
    *         
    @verbatim
    ==============================================================================
                          ##### How to use this driver #####
    ==============================================================================
    [..]
     The SD Extension HAL driver can be used as follows:
     (+) Configure Buffer0 and Buffer1 start address and Buffer size using HAL_SDEx_ConfigDMAMultiBuffer() function.
  
     (+) Start Read and Write for multibuffer mode using HAL_SDEx_ReadBlocksDMAMultiBuffer() and HAL_SDEx_WriteBlocksDMAMultiBuffer() functions.
     
    @endverbatim
    ******************************************************************************
    * @attention
    *
    * <h2><center>&copy; COPYRIGHT(c) 2018 STMicroelectronics</center></h2>
    *
    * Redistribution and use in source and binary forms, with or without modification,
    * are permitted provided that the following conditions are met:
    *   1. Redistributions of source code must retain the above copyright notice,
    *      this list of conditions and the following disclaimer.
    *   2. Redistributions in binary form must reproduce the above copyright notice,
    *      this list of conditions and the following disclaimer in the documentation
    *      and/or other materials provided with the distribution.
    *   3. Neither the name of STMicroelectronics nor the names of its contributors
    *      may be used to endorse or promote products derived from this software
    *      without specific prior written permission.
    *
    * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
    * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
    * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
    * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
    * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
    * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
    * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
    * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
    * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    *
    ******************************************************************************
    */ 
  
  /* Includes ------------------------------------------------------------------*/
  #include "stm32h7xx_hal.h"
  
  /** @addtogroup STM32H7xx_HAL_Driver
    * @{
    */
  
  /** @defgroup SDEx SDEx
    * @brief SD Extended HAL module driver
    * @{
    */
  
  #ifdef HAL_SD_MODULE_ENABLED
  
  /* Private typedef -----------------------------------------------------------*/
  /* Private define ------------------------------------------------------------*/
  /* Private macro -------------------------------------------------------------*/
  /* Private variables ---------------------------------------------------------*/
  /* Private function prototypes -----------------------------------------------*/
  /* Private functions ---------------------------------------------------------*/
  /* Exported functions --------------------------------------------------------*/
  /** @addtogroup SDEx_Exported_Functions
    * @{
    */
  
  /** @addtogroup SDEx_Exported_Functions_Group1
   *  @brief   Multibuffer functions 
   *
  @verbatim    
    ==============================================================================
            ##### Multibuffer functions #####
    ==============================================================================
    [..]  
      This section provides functions allowing to configure the multibuffer mode and start read and write 
      multibuffer mode for SD HAL driver.
        
  @endverbatim
    * @{
    */
  
  /**
    * @brief  Configure DMA Dual Buffer mode. The Data transfer is managed by an Internal DMA.
    * @param  hsd: SD handle
    * @param  pDataBuffer0: Pointer to the buffer0 that will contain/receive the transfered data
    * @param  pDataBuffer1: Pointer to the buffer1 that will contain/receive the transfered data
    * @param  BufferSize: Size of Buffer0 in Blocks. Buffer0 and Buffer1 must have the same size.
    * @retval HAL status
    */
  HAL_StatusTypeDef HAL_SDEx_ConfigDMAMultiBuffer(SD_HandleTypeDef *hsd, uint32_t *pDataBuffer0, uint32_t *pDataBuffer1, uint32_t BufferSize)
  {
    if(hsd->State == HAL_SD_STATE_READY)
    {
      hsd->Instance->IDMABASE0= (uint32_t) pDataBuffer0;
      hsd->Instance->IDMABASE1= (uint32_t) pDataBuffer1;
      hsd->Instance->IDMABSIZE= (uint32_t) (BLOCKSIZE * BufferSize);
      
      return HAL_OK;
    }
    else
    {
      return HAL_BUSY;
    }
  }
    
  /**
    * @brief  Reads block(s) from a specified address in a card. The received Data will be stored in Buffer0 and Buffer1.
    *         Buffer0, Buffer1 and BufferSize need to be configured by function HAL_SDEx_ConfigDMAMultiBuffer before call this function.
    * @param  hsd: SD handle
    * @param  BlockAdd: Block Address from where data is to be read  
    * @param  NumberOfBlocks: Total number of blocks to read
    * @retval HAL status
    */
  HAL_StatusTypeDef HAL_SDEx_ReadBlocksDMAMultiBuffer(SD_HandleTypeDef *hsd, uint32_t BlockAdd, uint32_t NumberOfBlocks)
  {
    SDMMC_DataInitTypeDef config;
    uint32_t errorstate;
    uint32_t DmaBase0_reg, DmaBase1_reg;
    uint32_t add = BlockAdd;
    
    if(hsd->State == HAL_SD_STATE_READY)
    {
      if((add + NumberOfBlocks) > (hsd->SdCard.LogBlockNbr))
      {
        hsd->ErrorCode |= HAL_SD_ERROR_ADDR_OUT_OF_RANGE;
        return HAL_ERROR;
      }
      
      DmaBase0_reg = hsd->Instance->IDMABASE0;
      DmaBase1_reg = hsd->Instance->IDMABASE1;
      if ((hsd->Instance->IDMABSIZE == 0U) || (DmaBase0_reg == 0U) || (DmaBase1_reg == 0U))
      {
        hsd->ErrorCode = HAL_SD_ERROR_ADDR_OUT_OF_RANGE;
        return HAL_ERROR;
      }
      
      /* Initialize data control register */
      hsd->Instance->DCTRL = 0;
      /* Clear old Flags*/
      __HAL_SD_CLEAR_FLAG(hsd, SDMMC_STATIC_FLAGS);
      
      hsd->ErrorCode = HAL_SD_ERROR_NONE;
      hsd->State = HAL_SD_STATE_BUSY;
  
      if(hsd->SdCard.CardType != CARD_SDHC_SDXC)
      {
        add *= 512U;
      }
      
      /* Configure the SD DPSM (Data Path State Machine) */ 
      config.DataTimeOut   = SDMMC_DATATIMEOUT;
      config.DataLength    = BLOCKSIZE * NumberOfBlocks;
      config.DataBlockSize = SDMMC_DATABLOCK_SIZE_512B;
      config.TransferDir   = SDMMC_TRANSFER_DIR_TO_SDMMC;
      config.TransferMode  = SDMMC_TRANSFER_MODE_BLOCK;
      config.DPSM          = SDMMC_DPSM_DISABLE;
      (void)SDMMC_ConfigData(hsd->Instance, &config);
      
      hsd->Instance->DCTRL |= SDMMC_DCTRL_FIFORST;
      
      __SDMMC_CMDTRANS_ENABLE( hsd->Instance);
      
      hsd->Instance->IDMACTRL = SDMMC_ENABLE_IDMA_DOUBLE_BUFF0; 
  
      __HAL_SD_ENABLE_IT(hsd, (SDMMC_IT_DCRCFAIL | SDMMC_IT_DTIMEOUT | SDMMC_IT_RXOVERR | SDMMC_IT_DATAEND | SDMMC_IT_IDMABTC));
     
      /* Read Blocks in DMA mode */
      hsd->Context = (SD_CONTEXT_READ_MULTIPLE_BLOCK | SD_CONTEXT_DMA);
      
      /* Read Multi Block command */
      errorstate = SDMMC_CmdReadMultiBlock(hsd->Instance, add);
      if(errorstate != HAL_SD_ERROR_NONE)
      {
        hsd->State = HAL_SD_STATE_READY;
        hsd->ErrorCode |= errorstate;
        return HAL_ERROR;
      }
      
      return HAL_OK;
    }
    else
    {
      return HAL_BUSY;
    }
     
  }
  
  /**
    * @brief  Write block(s) to a specified address in a card. The transfered Data are stored in Buffer0 and Buffer1.
    *         Buffer0, Buffer1 and BufferSize need to be configured by function HAL_SDEx_ConfigDMAMultiBuffer before call this function.
    * @param  hsd: SD handle
    * @param  BlockAdd: Block Address from where data is to be read  
    * @param  NumberOfBlocks: Total number of blocks to read
    * @retval HAL status
  */
  HAL_StatusTypeDef HAL_SDEx_WriteBlocksDMAMultiBuffer(SD_HandleTypeDef *hsd, uint32_t BlockAdd, uint32_t NumberOfBlocks)
  {
    SDMMC_DataInitTypeDef config;
    uint32_t errorstate;
    uint32_t DmaBase0_reg, DmaBase1_reg;
    uint32_t add = BlockAdd;
    
    if(hsd->State == HAL_SD_STATE_READY)
    {
      if((add + NumberOfBlocks) > (hsd->SdCard.LogBlockNbr))
      {
        hsd->ErrorCode |= HAL_SD_ERROR_ADDR_OUT_OF_RANGE;
        return HAL_ERROR;
      }
      
      DmaBase0_reg = hsd->Instance->IDMABASE0;
      DmaBase1_reg = hsd->Instance->IDMABASE1;
      if ((hsd->Instance->IDMABSIZE == 0U) || (DmaBase0_reg == 0U) || (DmaBase1_reg == 0U))
      {
        hsd->ErrorCode = HAL_SD_ERROR_ADDR_OUT_OF_RANGE;
        return HAL_ERROR;
      }
      
      /* Initialize data control register */
      hsd->Instance->DCTRL = 0;
      
      hsd->ErrorCode = HAL_SD_ERROR_NONE;
      
      hsd->State = HAL_SD_STATE_BUSY;
  
      if(hsd->SdCard.CardType != CARD_SDHC_SDXC)
      {
        add *= 512U;
      }
      
      /* Configure the SD DPSM (Data Path State Machine) */ 
      config.DataTimeOut   = SDMMC_DATATIMEOUT;
      config.DataLength    = BLOCKSIZE * NumberOfBlocks;
      config.DataBlockSize = SDMMC_DATABLOCK_SIZE_512B;
      config.TransferDir   = SDMMC_TRANSFER_DIR_TO_CARD;
      config.TransferMode  = SDMMC_TRANSFER_MODE_BLOCK;
      config.DPSM          = SDMMC_DPSM_DISABLE;
      (void)SDMMC_ConfigData(hsd->Instance, &config);
      
      __SDMMC_CMDTRANS_ENABLE( hsd->Instance);
      
      hsd->Instance->IDMACTRL = SDMMC_ENABLE_IDMA_DOUBLE_BUFF0; 
   
      __HAL_SD_ENABLE_IT(hsd, (SDMMC_IT_DCRCFAIL | SDMMC_IT_DTIMEOUT | SDMMC_IT_TXUNDERR | SDMMC_IT_DATAEND | SDMMC_IT_IDMABTC));
     
      /* Write Blocks in DMA mode */
      hsd->Context = (SD_CONTEXT_WRITE_MULTIPLE_BLOCK | SD_CONTEXT_DMA);
      
      /* Write Multi Block command */
      errorstate = SDMMC_CmdWriteMultiBlock(hsd->Instance, add);
      if(errorstate != HAL_SD_ERROR_NONE)
      {
        hsd->State = HAL_SD_STATE_READY;
        hsd->ErrorCode |= errorstate;
        return HAL_ERROR;
      }
      
      return HAL_OK;
    }
    else
    {
      return HAL_BUSY;
    }  
  }
  
    
  /**
    * @brief  Change the DMA Buffer0 or Buffer1 address on the fly.
    * @param  hsd:           pointer to a SD_HandleTypeDef structure.
    * @param  Buffer:        the buffer to be changed, This parameter can be one of 
    *                        the following values: SD_DMA_BUFFER0 or SD_DMA_BUFFER1
    * @param  pDataBuffer:   The new address
    * @note   The BUFFER0 address can be changed only when the current transfer use
    *         BUFFER1 and the BUFFER1 address can be changed only when the current 
    *         transfer use BUFFER0.
    * @retval HAL status
    */
  HAL_StatusTypeDef HAL_SDEx_ChangeDMABuffer(SD_HandleTypeDef *hsd, HAL_SDEx_DMABuffer_MemoryTypeDef Buffer, uint32_t *pDataBuffer)
  {
    if(Buffer == SD_DMA_BUFFER0)
    {
      /* change the buffer0 address */
      hsd->Instance->IDMABASE0 = (uint32_t)pDataBuffer;
    }
    else
    {
      /* change the memory1 address */
      hsd->Instance->IDMABASE1 = (uint32_t)pDataBuffer;
    }
    
    return HAL_OK;
  }
  
  
  /**
    * @}
    */
  
  #endif /* HAL_SD_MODULE_ENABLED */
  
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
  