stm32_eval_sdio_sd.c

来自「STM32的SPI1与SPI2通信」· C语言 代码 · 共 1,916 行 · 第 1/5 页

    ReadAddr /= 512;
  }

  SDIO_DataInitStructure.SDIO_DataTimeOut = SD_DATATIMEOUT;
  SDIO_DataInitStructure.SDIO_DataLength = BlockSize;
  SDIO_DataInitStructure.SDIO_DataBlockSize = (uint32_t) 9 << 4;
  SDIO_DataInitStructure.SDIO_TransferDir = SDIO_TransferDir_ToSDIO;
  SDIO_DataInitStructure.SDIO_TransferMode = SDIO_TransferMode_Block;
  SDIO_DataInitStructure.SDIO_DPSM = SDIO_DPSM_Enable;
  SDIO_DataConfig(&SDIO_DataInitStructure);

  /*!< Send CMD17 READ_SINGLE_BLOCK */
  SDIO_CmdInitStructure.SDIO_Argument = (uint32_t)ReadAddr;
  SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_READ_SINGLE_BLOCK;
  SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
  SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
  SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
  SDIO_SendCommand(&SDIO_CmdInitStructure);

  errorstatus = CmdResp1Error(SD_CMD_READ_SINGLE_BLOCK);

  if (errorstatus != SD_OK)
  {
    return(errorstatus);
  }

#if defined (SD_POLLING_MODE)  
  /*!< In case of single block transfer, no need of stop transfer at all.*/
  /*!< Polling mode */
  while (!(SDIO->STA &(SDIO_FLAG_RXOVERR | SDIO_FLAG_DCRCFAIL | SDIO_FLAG_DTIMEOUT | SDIO_FLAG_DBCKEND | SDIO_FLAG_STBITERR)))
  {
    if (SDIO_GetFlagStatus(SDIO_FLAG_RXFIFOHF) != RESET)
    {
      for (count = 0; count < 8; count++)
      {
        *(tempbuff + count) = SDIO_ReadData();
      }
      tempbuff += 8;
    }
  }

  if (SDIO_GetFlagStatus(SDIO_FLAG_DTIMEOUT) != RESET)
  {
    SDIO_ClearFlag(SDIO_FLAG_DTIMEOUT);
    errorstatus = SD_DATA_TIMEOUT;
    return(errorstatus);
  }
  else if (SDIO_GetFlagStatus(SDIO_FLAG_DCRCFAIL) != RESET)
  {
    SDIO_ClearFlag(SDIO_FLAG_DCRCFAIL);
    errorstatus = SD_DATA_CRC_FAIL;
    return(errorstatus);
  }
  else if (SDIO_GetFlagStatus(SDIO_FLAG_RXOVERR) != RESET)
  {
    SDIO_ClearFlag(SDIO_FLAG_RXOVERR);
    errorstatus = SD_RX_OVERRUN;
    return(errorstatus);
  }
  else if (SDIO_GetFlagStatus(SDIO_FLAG_STBITERR) != RESET)
  {
    SDIO_ClearFlag(SDIO_FLAG_STBITERR);
    errorstatus = SD_START_BIT_ERR;
    return(errorstatus);
  }
  while (SDIO_GetFlagStatus(SDIO_FLAG_RXDAVL) != RESET)
  {
    *tempbuff = SDIO_ReadData();
    tempbuff++;
  }
  
  /*!< Clear all the static flags */
  SDIO_ClearFlag(SDIO_STATIC_FLAGS);

#elif defined (SD_DMA_MODE)
    SDIO_ITConfig(SDIO_IT_DATAEND, ENABLE);
    SDIO_DMACmd(ENABLE);
    SD_LowLevel_DMA_RxConfig((uint32_t *)readbuff, BlockSize);
#endif

  return(errorstatus);
}

/**
  * @brief  Allows to read blocks from a specified address  in a card.  The Data
  *         transfer can be managed by DMA mode or Polling mode. 
  * @note   This operation should be followed by two functions to check if the 
  *         DMA Controller and SD Card status.
  *          - SD_ReadWaitOperation(): this function insure that the DMA
  *            controller has finished all data transfer.
  *          - SD_GetStatus(): to check that the SD Card has finished the 
  *            data transfer and it is ready for data.   
  * @param  readbuff: pointer to the buffer that will contain the received data.
  * @param  ReadAddr: Address from where data are to be read.
  * @param  BlockSize: the SD card Data block size. The Block size should be 512.
  * @param  NumberOfBlocks: number of blocks to be read.
  * @retval SD_Error: SD Card Error code.
  */
SD_Error SD_ReadMultiBlocks(uint8_t *readbuff, uint32_t ReadAddr, uint16_t BlockSize, uint32_t NumberOfBlocks)
{
  SD_Error errorstatus = SD_OK;
  TransferError = SD_OK;
  TransferEnd = 0;
  StopCondition = 1;
	
  SDIO->DCTRL = 0x0;

  if (CardType == SDIO_HIGH_CAPACITY_SD_CARD)
  {
    BlockSize = 512;
    ReadAddr /= 512;
  }

  /*!< Set Block Size for Card */
  SDIO_CmdInitStructure.SDIO_Argument = (uint32_t) BlockSize;
  SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_SET_BLOCKLEN;
  SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
  SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
  SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
  SDIO_SendCommand(&SDIO_CmdInitStructure);

  errorstatus = CmdResp1Error(SD_CMD_SET_BLOCKLEN);

  if (SD_OK != errorstatus)
  {
    return(errorstatus);
  }
    
  SDIO_DataInitStructure.SDIO_DataTimeOut = SD_DATATIMEOUT;
  SDIO_DataInitStructure.SDIO_DataLength = NumberOfBlocks * BlockSize;
  SDIO_DataInitStructure.SDIO_DataBlockSize = (uint32_t) 9 << 4;
  SDIO_DataInitStructure.SDIO_TransferDir = SDIO_TransferDir_ToSDIO;
  SDIO_DataInitStructure.SDIO_TransferMode = SDIO_TransferMode_Block;
  SDIO_DataInitStructure.SDIO_DPSM = SDIO_DPSM_Enable;
  SDIO_DataConfig(&SDIO_DataInitStructure);

  /*!< Send CMD18 READ_MULT_BLOCK with argument data address */
  SDIO_CmdInitStructure.SDIO_Argument = (uint32_t)ReadAddr;
  SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_READ_MULT_BLOCK;
  SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
  SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
  SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
  SDIO_SendCommand(&SDIO_CmdInitStructure);

  errorstatus = CmdResp1Error(SD_CMD_READ_MULT_BLOCK);

  if (errorstatus != SD_OK)
  {
    return(errorstatus);
  }

  SDIO_ITConfig(SDIO_IT_DATAEND, ENABLE);
  SDIO_DMACmd(ENABLE);
  SD_LowLevel_DMA_RxConfig((uint32_t *)readbuff, (NumberOfBlocks * BlockSize));

  return(errorstatus);
}

/**
  * @brief  This function waits until the SDIO DMA data transfer is finished. 
  *         This function should be called after SDIO_ReadMultiBlocks() function
  *         to insure that all data sent by the card are already transferred by 
  *         the DMA controller.        
  * @param  None.
  * @retval SD_Error: SD Card Error code.
  */
SD_Error SD_WaitReadOperation(void)
{
  SD_Error errorstatus = SD_OK;

  while ((SD_DMAEndOfTransferStatus() == RESET) && (TransferEnd == 0) && (TransferError == SD_OK))
  {}

  if (TransferError != SD_OK)
  {
    return(TransferError);
  }

  return(errorstatus);
}

/**
  * @brief  Allows to write one block starting from a specified address in a card.
  *         The Data transfer can be managed by DMA mode or Polling mode.
  * @note   This operation should be followed by two functions to check if the 
  *         DMA Controller and SD Card status.
  *          - SD_ReadWaitOperation(): this function insure that the DMA
  *            controller has finished all data transfer.
  *          - SD_GetStatus(): to check that the SD Card has finished the 
  *            data transfer and it is ready for data.      
  * @param  writebuff: pointer to the buffer that contain the data to be transferred.
  * @param  WriteAddr: Address from where data are to be read.   
  * @param  BlockSize: the SD card Data block size. The Block size should be 512.
  * @retval SD_Error: SD Card Error code.
  */
SD_Error SD_WriteBlock(uint8_t *writebuff, uint32_t WriteAddr, uint16_t BlockSize)
{
  SD_Error errorstatus = SD_OK;

#if defined (SD_POLLING_MODE)
  uint32_t bytestransferred = 0, count = 0, restwords = 0;
  uint32_t *tempbuff = (uint32_t *)writebuff;
#endif

  TransferError = SD_OK;
  TransferEnd = 0;
  StopCondition = 0;
  
  SDIO->DCTRL = 0x0;


  if (CardType == SDIO_HIGH_CAPACITY_SD_CARD)
  {
    BlockSize = 512;
    WriteAddr /= 512;
  }
  
  /*!< Send CMD24 WRITE_SINGLE_BLOCK */
  SDIO_CmdInitStructure.SDIO_Argument = WriteAddr;
  SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_WRITE_SINGLE_BLOCK;
  SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
  SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
  SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
  SDIO_SendCommand(&SDIO_CmdInitStructure);

  errorstatus = CmdResp1Error(SD_CMD_WRITE_SINGLE_BLOCK);

  if (errorstatus != SD_OK)
  {
    return(errorstatus);
  }

  SDIO_DataInitStructure.SDIO_DataTimeOut = SD_DATATIMEOUT;
  SDIO_DataInitStructure.SDIO_DataLength = BlockSize;
  SDIO_DataInitStructure.SDIO_DataBlockSize = (uint32_t) 9 << 4;
  SDIO_DataInitStructure.SDIO_TransferDir = SDIO_TransferDir_ToCard;
  SDIO_DataInitStructure.SDIO_TransferMode = SDIO_TransferMode_Block;
  SDIO_DataInitStructure.SDIO_DPSM = SDIO_DPSM_Enable;
  SDIO_DataConfig(&SDIO_DataInitStructure);

  /*!< In case of single data block transfer no need of stop command at all */
#if defined (SD_POLLING_MODE) 
  while (!(SDIO->STA & (SDIO_FLAG_DBCKEND | SDIO_FLAG_TXUNDERR | SDIO_FLAG_DCRCFAIL | SDIO_FLAG_DTIMEOUT | SDIO_FLAG_STBITERR)))
  {
    if (SDIO_GetFlagStatus(SDIO_FLAG_TXFIFOHE) != RESET)
    {
      if ((512 - bytestransferred) < 32)
      {
        restwords = ((512 - bytestransferred) % 4 == 0) ? ((512 - bytestransferred) / 4) : (( 512 -  bytestransferred) / 4 + 1);
        for (count = 0; count < restwords; count++, tempbuff++, bytestransferred += 4)
        {
          SDIO_WriteData(*tempbuff);
        }
      }
      else
      {
        for (count = 0; count < 8; count++)
        {
          SDIO_WriteData(*(tempbuff + count));
        }
        tempbuff += 8;
        bytestransferred += 32;
      }
    }
  }
  if (SDIO_GetFlagStatus(SDIO_FLAG_DTIMEOUT) != RESET)
  {
    SDIO_ClearFlag(SDIO_FLAG_DTIMEOUT);
    errorstatus = SD_DATA_TIMEOUT;
    return(errorstatus);
  }
  else if (SDIO_GetFlagStatus(SDIO_FLAG_DCRCFAIL) != RESET)
  {
    SDIO_ClearFlag(SDIO_FLAG_DCRCFAIL);
    errorstatus = SD_DATA_CRC_FAIL;
    return(errorstatus);
  }
  else if (SDIO_GetFlagStatus(SDIO_FLAG_TXUNDERR) != RESET)
  {
    SDIO_ClearFlag(SDIO_FLAG_TXUNDERR);
    errorstatus = SD_TX_UNDERRUN;
    return(errorstatus);
  }
  else if (SDIO_GetFlagStatus(SDIO_FLAG_STBITERR) != RESET)
  {
    SDIO_ClearFlag(SDIO_FLAG_STBITERR);
    errorstatus = SD_START_BIT_ERR;
    return(errorstatus);
  }
#elif defined (SD_DMA_MODE)
  SDIO_ITConfig(SDIO_IT_DATAEND, ENABLE);
  SD_LowLevel_DMA_TxConfig((uint32_t *)writebuff, BlockSize);
  SDIO_DMACmd(ENABLE);
#endif

  return(errorstatus);
}

/**
  * @brief  Allows to write blocks starting from a specified address in a card.
  *         The Data transfer can be managed by DMA mode only. 
  * @note   This operation should be followed by two functions to check if the 
  *         DMA Controller and SD Card status.
  *          - SD_ReadWaitOperation(): this function insure that the DMA
  *            controller has finished all data transfer.
  *          - SD_GetStatus(): to check that the SD Card has finished the 
  *            data transfer and it is ready for data.     
  * @param  WriteAddr: Address from where data are to be read.
  * @param  writebuff: pointer to the buffer that contain the data to be transferred.
  * @param  BlockSize: the SD card Data block size. The Block size should be 512.
  * @param  NumberOfBlocks: number of blocks to be written.
  * @retval SD_Error: SD Card Error code.
  */
SD_Error SD_WriteMultiBlocks(uint8_t *writebuff, uint32_t WriteAddr, uint16_t BlockSize, uint32_t NumberOfBlocks)
{
  SD_Error errorstatus = SD_OK;
  __IO uint32_t count = 0;

  TransferError = SD_OK;
  TransferEnd = 0;
  StopCondition = 1;
  
  SDIO->DCTRL = 0x0;

  if (CardType == SDIO_HIGH_CAPACITY_SD_CARD)
  {
    BlockSize = 512;
    WriteAddr /= 512;
  }

  /*!< To improve performance */
  SDIO_CmdInitStructure.SDIO_Argument = (uint32_t) (RCA << 16);
  SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_APP_CMD;
  SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
  SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
  SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
  SDIO_SendCommand(&SDIO_CmdInitStructure);


  errorstatus = CmdResp1Error(SD_CMD_APP_CMD);

  if (errorstatus != SD_OK)
  {
    return(errorstatus);
  }
  /*!< To improve performance */
  SDIO_CmdInitStructure.SDIO_Argument = (uint32_t)NumberOfBlocks;
  SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_SET_BLOCK_COUNT;
  SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
  SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
  SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
  SDIO_SendCommand(&SDIO_CmdInitStructure);

  errorstatus = CmdResp1Error(SD_CMD_SET_BLOCK_COUNT);

  if (errorstatus != SD_OK)
  {
    return(errorstatus);
  }


  /*!< Send CMD25 WRITE_MULT_BLOCK with argument data address */
  SDIO_CmdInitStructure.SDIO_Argument = (uint32_t)WriteAddr;
  SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_WRITE_MULT_BLOCK;
  SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
  SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
  SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
  SDIO_SendCommand(&SDIO_CmdInitStructure);

  errorstatus = CmdResp1Error(SD_CMD_WRITE_MULT_BLOCK);

  if (SD_OK != errorstatus)
  {
    return(errorstatus);
  }

  SDIO_DataInitStructure.SDIO_DataTimeOut = SD_DATATIMEOUT;
  SDIO_DataInitStructure.SDIO_DataLength = NumberOfBlocks * BlockSize;
  SDIO_DataInitStructure.SDIO_DataBlockSize = (uint32_t) 9 << 4;
  SDIO_DataInitStructure.SDIO_TransferDir = SDIO_TransferDir_ToCard;
  SDIO_DataInitStructure.SDIO_TransferMode = SDIO_TransferMode_Block;
  SDIO_DataInitStructure.SDIO_DPSM = SDIO_DPSM_Enable;
  SDIO_DataConfig(&SDIO_DataInitStructure);