sdcard.c

ARM_CORTEX-M3应用实例开发详解光盘

    CSD_Tab[0] = SDIO_GetResponse(SDIO_RESP1);
    CSD_Tab[1] = SDIO_GetResponse(SDIO_RESP2);
    CSD_Tab[2] = SDIO_GetResponse(SDIO_RESP3);
    CSD_Tab[3] = SDIO_GetResponse(SDIO_RESP4);
  }

  errorstatus = SD_OK; /* All cards get intialized */

  return(errorstatus);
}

/*******************************************************************************
* 函数名  : SD_GetCardInfo
* 功能描述: 获取卡信息.
* 输入    : cardinfo 
* 输出    :无
* Return  : SD_Error: SD卡错误代码.
*******************************************************************************/
SD_Error SD_GetCardInfo(SD_CardInfo *cardinfo)
{
  SD_Error errorstatus = SD_OK;
  u8 tmp = 0;

  cardinfo->CardType = (u8)CardType;
  cardinfo->RCA = (u16)RCA;

  /* Byte 0 */
  tmp = (u8)((CSD_Tab[0] & 0xFF000000) >> 24);
  cardinfo->SD_csd.CSDStruct = (tmp & 0xC0) >> 6;
  cardinfo->SD_csd.SysSpecVersion = (tmp & 0x3C) >> 2;
  cardinfo->SD_csd.Reserved1 = tmp & 0x03;

  /* Byte 1 */
  tmp = (u8)((CSD_Tab[0] & 0x00FF0000) >> 16);
  cardinfo->SD_csd.TAAC = tmp;

  /* Byte 2 */
  tmp = (u8)((CSD_Tab[0] & 0x0000FF00) >> 8);
  cardinfo->SD_csd.NSAC = tmp;

  /* Byte 3 */
  tmp = (u8)(CSD_Tab[0] & 0x000000FF);
  cardinfo->SD_csd.MaxBusClkFrec = tmp;

  /* Byte 4 */
  tmp = (u8)((CSD_Tab[1] & 0xFF000000) >> 24);
  cardinfo->SD_csd.CardComdClasses = tmp << 4;

  /* Byte 5 */
  tmp = (u8)((CSD_Tab[1] & 0x00FF0000) >> 16);
  cardinfo->SD_csd.CardComdClasses |= (tmp & 0xF0) >> 4;
  cardinfo->SD_csd.RdBlockLen = tmp & 0x0F;

  /* Byte 6 */
  tmp = (u8)((CSD_Tab[1] & 0x0000FF00) >> 8);
  cardinfo->SD_csd.PartBlockRead = (tmp & 0x80) >> 7;
  cardinfo->SD_csd.WrBlockMisalign = (tmp & 0x40) >> 6;
  cardinfo->SD_csd.RdBlockMisalign = (tmp & 0x20) >> 5;
  cardinfo->SD_csd.DSRImpl = (tmp & 0x10) >> 4;
  cardinfo->SD_csd.Reserved2 = 0; /* Reserved */
  cardinfo->SD_csd.DeviceSize = (tmp & 0x03) << 10;

  /* Byte 7 */
  tmp = (u8)(CSD_Tab[1] & 0x000000FF);
  cardinfo->SD_csd.DeviceSize |= (tmp) << 2;

  /* Byte 8 */
  tmp = (u8)((CSD_Tab[2] & 0xFF000000) >> 24);

  cardinfo->SD_csd.DeviceSize |= (tmp & 0xC0) >> 6;
  cardinfo->SD_csd.MaxRdCurrentVDDMin = (tmp & 0x38) >> 3;
  cardinfo->SD_csd.MaxRdCurrentVDDMax = (tmp & 0x07);

  /* Byte 9 */
  tmp = (u8)((CSD_Tab[2] & 0x00FF0000) >> 16);
  cardinfo->SD_csd.MaxWrCurrentVDDMin = (tmp & 0xE0) >> 5;
  cardinfo->SD_csd.MaxWrCurrentVDDMax = (tmp & 0x1C) >> 2;
  cardinfo->SD_csd.DeviceSizeMul = (tmp & 0x03) << 1;

  /* Byte 10 */
  tmp = (u8)((CSD_Tab[2] & 0x0000FF00) >> 8);
  cardinfo->SD_csd.DeviceSizeMul |= (tmp & 0x80) >> 7;
  cardinfo->SD_csd.EraseGrSize = (tmp & 0x40) >> 6;
  cardinfo->SD_csd.EraseGrMul = (tmp & 0x3F) << 1;

  /* Byte 11 */
  tmp = (u8)(CSD_Tab[2] & 0x000000FF);
  cardinfo->SD_csd.EraseGrMul |= (tmp & 0x80) >> 7;
  cardinfo->SD_csd.WrProtectGrSize = (tmp & 0x7F);

  /* Byte 12 */
  tmp = (u8)((CSD_Tab[3] & 0xFF000000) >> 24);
  cardinfo->SD_csd.WrProtectGrEnable = (tmp & 0x80) >> 7;
  cardinfo->SD_csd.ManDeflECC = (tmp & 0x60) >> 5;
  cardinfo->SD_csd.WrSpeedFact = (tmp & 0x1C) >> 2;
  cardinfo->SD_csd.MaxWrBlockLen = (tmp & 0x03) << 2;

  /* Byte 13 */
  tmp = (u8)((CSD_Tab[3] & 0x00FF0000) >> 16);
  cardinfo->SD_csd.MaxWrBlockLen |= (tmp & 0xC0) >> 6;
  cardinfo->SD_csd.WriteBlockPaPartial = (tmp & 0x20) >> 5;
  cardinfo->SD_csd.Reserved3 = 0;
  cardinfo->SD_csd.ContentProtectAppli = (tmp & 0x01);

  /* Byte 14 */
  tmp = (u8)((CSD_Tab[3] & 0x0000FF00) >> 8);
  cardinfo->SD_csd.FileFormatGrouop = (tmp & 0x80) >> 7;
  cardinfo->SD_csd.CopyFlag = (tmp & 0x40) >> 6;
  cardinfo->SD_csd.PermWrProtect = (tmp & 0x20) >> 5;
  cardinfo->SD_csd.TempWrProtect = (tmp & 0x10) >> 4;
  cardinfo->SD_csd.FileFormat = (tmp & 0x0C) >> 2;
  cardinfo->SD_csd.ECC = (tmp & 0x03);

  /* Byte 15 */
  tmp = (u8)(CSD_Tab[3] & 0x000000FF);
  cardinfo->SD_csd.CSD_CRC = (tmp & 0xFE) >> 1;
  cardinfo->SD_csd.Reserved4 = 1;


  /* Byte 0 */
  tmp = (u8)((CID_Tab[0] & 0xFF000000) >> 24);
  cardinfo->SD_cid.ManufacturerID = tmp;

  /* Byte 1 */
  tmp = (u8)((CID_Tab[0] & 0x00FF0000) >> 16);
  cardinfo->SD_cid.OEM_AppliID = tmp << 8;

  /* Byte 2 */
  tmp = (u8)((CID_Tab[0] & 0x000000FF00) >> 8);
  cardinfo->SD_cid.OEM_AppliID |= tmp;

  /* Byte 3 */
  tmp = (u8)(CID_Tab[0] & 0x000000FF);
  cardinfo->SD_cid.ProdName1 = tmp << 24;

  /* Byte 4 */
  tmp = (u8)((CID_Tab[1] & 0xFF000000) >> 24);
  cardinfo->SD_cid.ProdName1 |= tmp << 16;

  /* Byte 5 */
  tmp = (u8)((CID_Tab[1] & 0x00FF0000) >> 16);
  cardinfo->SD_cid.ProdName1 |= tmp << 8;

  /* Byte 6 */
  tmp = (u8)((CID_Tab[1] & 0x0000FF00) >> 8);
  cardinfo->SD_cid.ProdName1 |= tmp;

  /* Byte 7 */
  tmp = (u8)(CID_Tab[1] & 0x000000FF);
  cardinfo->SD_cid.ProdName2 = tmp;

  /* Byte 8 */
  tmp = (u8)((CID_Tab[2] & 0xFF000000) >> 24);
  cardinfo->SD_cid.ProdRev = tmp;

  /* Byte 9 */
  tmp = (u8)((CID_Tab[2] & 0x00FF0000) >> 16);
  cardinfo->SD_cid.ProdSN = tmp << 24;

  /* Byte 10 */
  tmp = (u8)((CID_Tab[2] & 0x0000FF00) >> 8);
  cardinfo->SD_cid.ProdSN |= tmp << 16;

  /* Byte 11 */
  tmp = (u8)(CID_Tab[2] & 0x000000FF);
  cardinfo->SD_cid.ProdSN |= tmp << 8;

  /* Byte 12 */
  tmp = (u8)((CID_Tab[3] & 0xFF000000) >> 24);
  cardinfo->SD_cid.ProdSN |= tmp;

  /* Byte 13 */
  tmp = (u8)((CID_Tab[3] & 0x00FF0000) >> 16);
  cardinfo->SD_cid.Reserved1 |= (tmp & 0xF0) >> 4;
  cardinfo->SD_cid.ManufactDate = (tmp & 0x0F) << 8;

  /* Byte 14 */
  tmp = (u8)((CID_Tab[3] & 0x0000FF00) >> 8);
  cardinfo->SD_cid.ManufactDate |= tmp;

  /* Byte 15 */
  tmp = (u8)(CID_Tab[3] & 0x000000FF);
  cardinfo->SD_cid.CID_CRC = (tmp & 0xFE) >> 1;
  cardinfo->SD_cid.Reserved2 = 1;

  return(errorstatus);
}

/*******************************************************************************
* 函数名  : SD_EnableWideBusOperation
* 功能描述 : 使能SD卡数据传输模式（SD_8/4/1位模式）
* 输入          : 位宽度模式 
*                       - SDIO_BusWide_8b: 8位数据传输 (仅MMC卡)
*                       - SDIO_BusWide_4b: 4位数据传输
*                       - SDIO_BusWide_1b: 1位数据传输
* 输出　         : 无
* 返回         : SD_Error: SD卡错误代码
*******************************************************************************/
SD_Error SD_EnableWideBusOperation(u32 WideMode)
{
  SD_Error errorstatus = SD_OK;

  /* MMC不支持此操作 */
  if (SDIO_MULTIMEDIA_CARD == CardType)
  {
    errorstatus = SD_UNSUPPORTED_FEATURE;
    return(errorstatus);
  }
  else if ((SDIO_SECURE_DIGITAL_CARD == CardType) || (SDIO_HIGH_CAPACITY_SD_CARD == CardType))
  {
    if (SDIO_BusWide_8b == WideMode)
    {
      errorstatus = SD_UNSUPPORTED_FEATURE;
      return(errorstatus);
    }
    else if (SDIO_BusWide_4b == WideMode)
    {
      errorstatus = SDEnWideBus(ENABLE);

      if (SD_OK == errorstatus)
      {
        /* 配置SDIO外设 */
        SDIO_InitStructure.SDIO_ClockDiv = SDIO_TRANSFER_CLK_DIV; 
        SDIO_InitStructure.SDIO_ClockEdge = SDIO_ClockEdge_Rising;
        SDIO_InitStructure.SDIO_ClockBypass = SDIO_ClockBypass_Disable;
        SDIO_InitStructure.SDIO_ClockPowerSave = SDIO_ClockPowerSave_Disable;
        SDIO_InitStructure.SDIO_BusWide = SDIO_BusWide_4b;
        SDIO_InitStructure.SDIO_HardwareFlowControl = SDIO_HardwareFlowControl_Disable;/*硬件流控*/
        SDIO_Init(&SDIO_InitStructure);
      }
    }
    else
    {
      errorstatus = SDEnWideBus(DISABLE);

      if (SD_OK == errorstatus)
      {
        /* 配置SDIO外设  */
        SDIO_InitStructure.SDIO_ClockDiv = SDIO_TRANSFER_CLK_DIV; 
        SDIO_InitStructure.SDIO_ClockEdge = SDIO_ClockEdge_Rising;
        SDIO_InitStructure.SDIO_ClockBypass = SDIO_ClockBypass_Disable;
        SDIO_InitStructure.SDIO_ClockPowerSave = SDIO_ClockPowerSave_Disable;
        SDIO_InitStructure.SDIO_BusWide = SDIO_BusWide_1b;
        SDIO_InitStructure.SDIO_HardwareFlowControl = SDIO_HardwareFlowControl_Disable;
        SDIO_Init(&SDIO_InitStructure);
      }
    }
  }

  return(errorstatus);
}

/*******************************************************************************
* 函数名  : SD_SetDeviceMode
* 功能描述    : Sets device mode whether to operate in Polling, Interrupt or
*                  DMA mode.
* 输入          : Mode: Specifies the Data Transfer mode.
*                     This parameter can be one of the following values:
*                       - SD_DMA_MODE: Data transfer using DMA.
*                       - SD_INTERRUPT_MODE: Data transfer using interrupts.
*                       - SD_POLLING_MODE: Data transfer using flags.
* 输出         : None
* 返回         : SD_Error: SD Card Error code.
*******************************************************************************/
SD_Error SD_SetDeviceMode(u32 Mode)
{
  SD_Error errorstatus = SD_OK;

  if ((Mode == SD_DMA_MODE) || (Mode == SD_INTERRUPT_MODE) || (Mode == SD_POLLING_MODE))
  {
    DeviceMode = Mode;
  }
  else
  {
    errorstatus = SD_INVALID_PARAMETER;
  }
  return(errorstatus);

}

/*******************************************************************************
* 函数名  : SD_SelectDeselect
* 功能描述    : Selects od Deselects the corresponding card.
* 输入          : addr: Address of the Card to be selected.
* 输出         : None
* 返回         : SD_Error: SD Card Error code.
*******************************************************************************/
SD_Error SD_SelectDeselect(u32 addr)
{
  SD_Error errorstatus = SD_OK;

  /* Send CMD7 SDIO_SEL_DESEL_CARD */
  SDIO_CmdInitStructure.SDIO_Argument =  addr;
  SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_SEL_DESEL_CARD;
  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(SDIO_SEL_DESEL_CARD);

  return(errorstatus);
}

/*******************************************************************************
* 函数名  : SD_ReadBlock
* 功能描述   　: 读块.
* 输入         : - addr: 指定数据地址.
*                  - readbuff: 缓存指针
*                  - blocksize: 数据块大小.
* 输出         : 无
* 返回         : SD_Error: 错误代码.
*******************************************************************************/
SD_Error SD_ReadBlock(u32 addr, u32 *readbuff, u16 BlockSize)
{
  SD_Error errorstatus = SD_OK;
  u32 count = 0, *tempbuff = readbuff;
  u8 power = 0;

  if (NULL == readbuff)
  {
    errorstatus = SD_INVALID_PARAMETER;
    return(errorstatus);
  }

  TransferError = SD_OK;
  TransferEnd = 0;
  TotalNumberOfBytes = 0;

  /* 清除DPSM配置 */
  SDIO_DataInitStructure.SDIO_DataTimeOut = SD_DATATIMEOUT;
  SDIO_DataInitStructure.SDIO_DataLength = 0;
  SDIO_DataInitStructure.SDIO_DataBlockSize = SDIO_DataBlockSize_1b;
  SDIO_DataInitStructure.SDIO_TransferDir = SDIO_TransferDir_ToCard;
  SDIO_DataInitStructure.SDIO_TransferMode = SDIO_TransferMode_Block;
  SDIO_DataInitStructure.SDIO_DPSM = SDIO_DPSM_Disable;
  SDIO_DataConfig(&SDIO_DataInitStructure);
  SDIO_DMACmd(DISABLE);

  if (SDIO_GetResponse(SDIO_RESP1) & SD_CARD_LOCKED)
  {
    errorstatus = SD_LOCK_UNLOCK_FAILED;
    return(errorstatus);
  }

  if ((BlockSize > 0) && (BlockSize <= 2048) && ((BlockSize & (BlockSize - 1)) == 0))
  {
    power = convert_from_bytes_to_power_of_two(BlockSize);

    /*设定块大小*/
    SDIO_CmdInitStructure.SDIO_Argument = (u32) BlockSize;
    SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_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(SDIO_SET_BLOCKLEN);

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

  SDIO_DataInitStructure.SDIO_DataTimeOut = SD_DATATIMEOUT;
  SDIO_DataInitStructure.SDIO_DataLength = BlockSize;
  SDIO_DataInitStructure.SDIO_DataBlockSize = (u32) power << 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);

  TotalNumberOfBytes = BlockSize;
  StopCondition = 0;
  DestBuffer = readbuff;

  /* 发送命令CMD17 READ_SINGLE_BLOCK */
  SDIO_CmdInitStructure.SDIO_Argument = (u32)addr;