sdcard.c

STM32实现读卡器功能,适用于STM32E-EVAL开发板

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

    CID_Tab[0] = SDIO_GetResponse(SDIO_RESP1);
    CID_Tab[1] = SDIO_GetResponse(SDIO_RESP2);
    CID_Tab[2] = SDIO_GetResponse(SDIO_RESP3);
    CID_Tab[3] = SDIO_GetResponse(SDIO_RESP4);
  }
  if ((SDIO_SECURE_DIGITAL_CARD == CardType) ||  (SDIO_SECURE_DIGITAL_IO_CARD == CardType) ||  (SDIO_SECURE_DIGITAL_IO_COMBO_CARD == CardType)
      ||  (SDIO_HIGH_CAPACITY_SD_CARD == CardType))
  {
    /* Send CMD3 SET_REL_ADDR with argument 0 */
    /* SD Card publishes its RCA. */
    SDIO_CmdInitStructure.SDIO_Argument = 0x00;
    SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_SET_REL_ADDR;
    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 = CmdResp6Error(SDIO_SET_REL_ADDR, &rca);

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

  if (SDIO_SECURE_DIGITAL_IO_CARD != CardType)
  {
    RCA = rca;

    /* Send CMD9 SEND_CSD with argument as card's RCA */
    SDIO_CmdInitStructure.SDIO_Argument = (u32)(rca << 16);
    SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_SEND_CSD;
    SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Long;
    SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
    SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
    SDIO_SendCommand(&SDIO_CmdInitStructure);

    errorstatus = CmdResp2Error();

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

    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);
}

/*******************************************************************************
* Function Name  : SD_GetCardInfo
* Description    : Returns information about specific card.
* Input          : cardinfo : pointer to a SD_CardInfo structure 
*                  that contains all SD card information.
* Output         : None
* Return         : SD_Error: SD Card Error code.
*******************************************************************************/
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);
}

/*******************************************************************************
* Function Name  : SD_EnableWideBusOperation
* Description    : Enables wide bus opeartion for the requeseted card if 
*                  supported by card.
* Input          : WideMode: Specifies the SD card wide bus mode. 
*                     This parameter can be one of the following values:
*                       - SDIO_BusWide_8b: 8-bit data transfer (Only for MMC)
*                       - SDIO_BusWide_4b: 4-bit data transfer
*                       - SDIO_BusWide_1b: 1-bit data transfer
* Output         : None
* Return         : SD_Error: SD Card Error code.
*******************************************************************************/
SD_Error SD_EnableWideBusOperation(u32 WideMode)
{
  SD_Error errorstatus = SD_OK;

  /* MMC Card doesn't support this feature */
  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)
      {
        /* Configure the SDIO peripheral */
        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;
        SDIO_Init(&SDIO_InitStructure);
      }
    }
    else
    {
      errorstatus = SDEnWideBus(DISABLE);

      if (SD_OK == errorstatus)
      {
        /* Configure the SDIO peripheral */
        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);
}

/*******************************************************************************
* Function Name  : SD_SetDeviceMode
* Description    : Sets device mode whether to operate in Polling, Interrupt or
*                  DMA mode.
* Input          : 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.
* Output         : None
* Return         : 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);

}

/*******************************************************************************
* Function Name  : SD_SelectDeselect
* Description    : Selects od Deselects the corresponding card.
* Input          : addr: Address of the Card to be selected.
* Output         : None
* Return         : 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);
}

/*******************************************************************************
* Function Name  : SD_ReadBlock
* Description    : Allows to read one block from a specified address in a card.
* Input          : - addr: Address from where data are to be read.
*                  - readbuff: pointer to the buffer that will contain the 
*                    received data
*                  - blocksize: the SD card Data block size.
* Output         : None
* Return         : SD_Error: SD Card Error code.
*******************************************************************************/
SD_Error SD_ReadBlock(u32 addr, u32 *readbuff, u16 BlockSize)
{
  SD_Error errorstatus = SD_OK;
  u32 count = 0, *tempbuff = readbuff;
  u8 power = 0;