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SD相关
0750long | 2010-02-11 23:11:17    阅读:4329   发布文章

SD相关

 

 

/**

SD卡命令共分为12类,分别为class0到class11,

不同的SDd卡,主控根据其功能,支持不同的命令集 如下:

Class0 :(卡的识别、初始化等基本命令集)

 CMD0:复位SD 卡.

 CMD1:读OCR寄存器.

 CMD9:读CSD寄存器.

 CMD10:读CID寄存器.

 CMD12:停止读多块时的数据传输

 CMD13:读 Card_Status 寄存器

Class2 (读卡命令集):

CMD16:设置块的长度

CMD17:读单块.

CMD18:读多块,直至主机发送CMD12为止 .

 

Class4(写卡命令集) :

CMD24:写单块.

CMD25:写多块.

CMD27:写CSD寄存器 .

Class5 (擦除卡命令集):

CMD32:设置擦除块的起始地址.

CMD33:设置擦除块的终止地址.

CMD38: 擦除所选择的块.

Class6(写保护命令集):

CMD28:设置写保护块的地址.

CMD29:擦除写保护块的地址.

CMD30: Ask the card for the status of the write protection bits

 

class7:卡的锁定,解锁功能命令集  

class8:申请特定命令集 。 

class10 -11 :保留

其中 class1,    class3,class9:SPI模式不支持    


  ******************************************************************************
  * @file    SDIO/sdcard.c
  * @author  MCD Application Team
  * @version V3.1.2
  * @date    09/28/2009
  * @brief   This file provides all the SD Card driver firmware functions.
  ******************************************************************************
  * @copy
  *
  * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
  * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
  * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
  * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
  * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
  * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
  *
  * <h2><center>&copy; COPYRIGHT 2009 STMicroelectronics</center></h2>
  */

/* Includes ------------------------------------------------------------------*/
#include "sdcard.h"

/** @addtogroup STM32F10x_StdPeriph_Examples
  * @{
  */

/** @addtogroup SDIO_Example
  * @{
  */

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define NULL 0
#define SDIO_STATIC_FLAGS               ((uint32_t)0x000005FF)
#define SDIO_CMD0TIMEOUT                ((uint32_t)0x00002710)
#define SDIO_FIFO_Address               ((uint32_t)0x40018080)

/* Mask for errors Card Status R1 (OCR Register) */
#define SD_OCR_ADDR_OUT_OF_RANGE        ((uint32_t)0x80000000)
#define SD_OCR_ADDR_MISALIGNED          ((uint32_t)0x40000000)
#define SD_OCR_BLOCK_LEN_ERR            ((uint32_t)0x20000000)
#define SD_OCR_ERASE_SEQ_ERR            ((uint32_t)0x10000000)
#define SD_OCR_BAD_ERASE_PARAM          ((uint32_t)0x08000000)
#define SD_OCR_WRITE_PROT_VIOLATION     ((uint32_t)0x04000000)
#define SD_OCR_LOCK_UNLOCK_FAILED       ((uint32_t)0x01000000)
#define SD_OCR_COM_CRC_FAILED           ((uint32_t)0x00800000)
#define SD_OCR_ILLEGAL_CMD              ((uint32_t)0x00400000)
#define SD_OCR_CARD_ECC_FAILED          ((uint32_t)0x00200000)
#define SD_OCR_CC_ERROR                 ((uint32_t)0x00100000)
#define SD_OCR_GENERAL_UNKNOWN_ERROR    ((uint32_t)0x00080000)
#define SD_OCR_STREAM_READ_UNDERRUN     ((uint32_t)0x00040000)
#define SD_OCR_STREAM_WRITE_OVERRUN     ((uint32_t)0x00020000)
#define SD_OCR_CID_CSD_OVERWRIETE       ((uint32_t)0x00010000)
#define SD_OCR_WP_ERASE_SKIP            ((uint32_t)0x00008000)
#define SD_OCR_CARD_ECC_DISABLED        ((uint32_t)0x00004000)
#define SD_OCR_ERASE_RESET              ((uint32_t)0x00002000)
#define SD_OCR_AKE_SEQ_ERROR            ((uint32_t)0x00000008)
#define SD_OCR_ERRORBITS                ((uint32_t)0xFDFFE008)

/* Masks for R6 Response */
#define SD_R6_GENERAL_UNKNOWN_ERROR     ((uint32_t)0x00002000)
#define SD_R6_ILLEGAL_CMD               ((uint32_t)0x00004000)
#define SD_R6_COM_CRC_FAILED            ((uint32_t)0x00008000)

#define SD_VOLTAGE_WINDOW_SD            ((uint32_t)0x80100000)
#define SD_HIGH_CAPACITY                ((uint32_t)0x40000000)
#define SD_STD_CAPACITY                 ((uint32_t)0x00000000)
#define SD_CHECK_PATTERN                ((uint32_t)0x000001AA)

#define SD_MAX_VOLT_TRIAL               ((uint32_t)0x0000FFFF)
#define SD_ALLZERO                      ((uint32_t)0x00000000)

#define SD_WIDE_BUS_SUPPORT             ((uint32_t)0x00040000)
#define SD_SINGLE_BUS_SUPPORT           ((uint32_t)0x00010000)
#define SD_CARD_LOCKED                  ((uint32_t)0x02000000)
#define SD_CARD_PROGRAMMING             ((uint32_t)0x00000007)
#define SD_CARD_RECEIVING               ((uint32_t)0x00000006)
#define SD_DATATIMEOUT                  ((uint32_t)0x000FFFFF)
#define SD_0TO7BITS                     ((uint32_t)0x000000FF)
#define SD_8TO15BITS                    ((uint32_t)0x0000FF00)
#define SD_16TO23BITS                   ((uint32_t)0x00FF0000)
#define SD_24TO31BITS                   ((uint32_t)0xFF000000)
#define SD_MAX_DATA_LENGTH              ((uint32_t)0x01FFFFFF)

#define SD_HALFFIFO                     ((uint32_t)0x00000008)
#define SD_HALFFIFOBYTES                ((uint32_t)0x00000020)

/* Command Class Supported */
#define SD_CCCC_LOCK_UNLOCK             ((uint32_t)0x00000080)
#define SD_CCCC_WRITE_PROT              ((uint32_t)0x00000040)
#define SD_CCCC_ERASE                   ((uint32_t)0x00000020)

/* Following commands are SD Card Specific commands.
   SDIO_APP_CMD should be sent before sending these commands. */
#define SDIO_SEND_IF_COND               ((uint32_t)0x00000008)

#define SDIO_INIT_CLK_DIV                  ((uint8_t)0xB2)
#define SDIO_TRANSFER_CLK_DIV              ((uint8_t)0x1)

/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
static uint32_t CardType =  SDIO_STD_CAPACITY_SD_CARD_V1_1;
//static uint32_t CardType =  SDIO_SECURE_DIGITAL_IO_COMBO_CARD;
static uint32_t CSD_Tab[4], CID_Tab[4], RCA = 0;
static uint32_t DeviceMode = SD_POLLING_MODE;
static uint32_t TotalNumberOfBytes = 0, StopCondition = 0;
uint32_t *SrcBuffer, *DestBuffer;
volatile SD_Error TransferError = SD_OK;
__IO uint32_t TransferEnd = 0;
__IO uint32_t NumberOfBytes = 0;
SDIO_InitTypeDef SDIO_InitStructure;
SDIO_CmdInitTypeDef SDIO_CmdInitStructure;
SDIO_DataInitTypeDef SDIO_DataInitStructure;

/* Private function prototypes -----------------------------------------------*/
static SD_Error CmdError(void);
static SD_Error CmdResp1Error(uint8_t cmd);
static SD_Error CmdResp7Error(void);
static SD_Error CmdResp3Error(void);
static SD_Error CmdResp2Error(void);
static SD_Error CmdResp6Error(uint8_t cmd, uint16_t *prca);
static SD_Error SDEnWideBus(FunctionalState NewState);
static SD_Error IsCardProgramming(uint8_t *pstatus);
static SD_Error FindSCR(uint16_t rca, uint32_t *pscr);
static uint8_t convert_from_bytes_to_power_of_two(uint16_t NumberOfBytes);
static void GPIO_Configuration(void);
static void DMA_TxConfiguration(uint32_t *BufferSRC, uint32_t BufferSize);
static void DMA_RxConfiguration(uint32_t *BufferDST, uint32_t BufferSize);

/* Private functions ---------------------------------------------------------*/

/**
  * @brief  Initializes the SD Card and put it into StandBy State (Ready
  *   for data transfer).
  * @param  None
  * @retval SD_Error: SD Card Error code.
  */
SD_Error SD_Init(void)
{
  SD_Error errorstatus = SD_OK;

  /* Configure SDIO interface GPIO */
  GPIO_Configuration();

  /* Enable the SDIO AHB Clock */
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_SDIO, ENABLE);

  /* Enable the DMA2 Clock */
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA2, ENABLE);

  SDIO_DeInit();

  errorstatus = SD_PowerON();//对SD卡做一系列的检测

  if (errorstatus != SD_OK)
  {
    /* CMD Response TimeOut (wait for CMDSENT flag) */
    return(errorstatus);
  }

  errorstatus = SD_InitializeCards();//初始化SD卡

  if (errorstatus != SD_OK)
  {
    /* CMD Response TimeOut (wait for CMDSENT flag) */
    return(errorstatus);
  }

  /* Configure the SDIO peripheral */
  /* HCLK = 72 MHz, SDIOCLK = 72 MHz, SDIO_CK = HCLK/(2 + 1) = 24 MHz */ 
  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);
}

/**
  * @brief  Enquires cards about their operating voltage and configures
  *   clock controls. 简短的任何查询,卡对他们的工作电压和配置
       时钟控制。
  * @param  None
  * @retval SD_Error: SD Card Error code.
  */
SD_Error SD_PowerON(void)
{
  SD_Error errorstatus = SD_OK;
  uint32_t response = 0, count = 0;
  bool validvoltage = FALSE;
  uint32_t SDType = SD_STD_CAPACITY;

  /* Power ON Sequence -------------------------------------------------------*/
  /* Configure the SDIO peripheral 配置的SDIO外设*/
  SDIO_InitStructure.SDIO_ClockDiv = SDIO_INIT_CLK_DIV; /* HCLK = 72MHz, SDIOCLK = 72MHz, SDIO_CK = HCLK/(178 + 2) = 400 KHz */
  SDIO_InitStructure.SDIO_ClockEdge = SDIO_ClockEdge_Rising ;//时钟脉冲边沿
  SDIO_InitStructure.SDIO_ClockBypass = SDIO_ClockBypass_Disable;//旁路时钟
  SDIO_InitStructure.SDIO_ClockPowerSave = SDIO_ClockPowerSave_Disable;//时钟节电
  SDIO_InitStructure.SDIO_BusWide = SDIO_BusWide_1b;//总线宽度
  SDIO_InitStructure.SDIO_HardwareFlowControl = SDIO_HardwareFlowControl_Disable;//硬件流控制
 
  SDIO_Init(&SDIO_InitStructure);//即用上面的值初始化华SDIO

  /* Set Power State to ON */
  SDIO_SetPowerState(SDIO_PowerState_ON);//打开电源

  /* Enable SDIO Clock */
  SDIO_ClockCmd(ENABLE); //使能SDIO时钟

  /* CMD0: GO_IDLE_STATE -------------------------------------------------------*/
  /* No CMD response required */
  SDIO_CmdInitStructure.SDIO_Argument = 0x0;
  SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_GO_IDLE_STATE;
  SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_No;
  SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
  SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
  SDIO_SendCommand(&SDIO_CmdInitStructure);//根据SDIO_CmdInitStructure中的参数发送命令

  errorstatus = CmdError();//查询命令发送的情况

  if (errorstatus != SD_OK)
  {
    /* CMD Response TimeOut (wait for CMDSENT flag) CMD相应超时 */
    return(errorstatus);
  }

  /* CMD8: SEND_IF_COND --------------------------------------------------------*/
  /* Send CMD8 to verify SD card interface operating condition 发送CMD8核实SD卡接口,操作条件*/
  /* Argument: - [31:12]: Reserved (shall be set to '0')
               - [11:8]: Supply Voltage (VHS) 0x1 (Range: 2.7-3.6 V)
               - [7:0]: Check Pattern (recommended 0xAA) */
  /* CMD Response: R7 */
  SDIO_CmdInitStructure.SDIO_Argument = SD_CHECK_PATTERN;
  SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_SEND_IF_COND;
  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);  //发送命令

  errorstatus = CmdResp7Error();//错误信息检测

  if (errorstatus == SD_OK)
  {
    CardType = SDIO_STD_CAPACITY_SD_CARD_V2_0; /* SD Card 2.0 */
    SDType = SD_HIGH_CAPACITY;
  }
  else
  {
    /* CMD55 */
    SDIO_CmdInitStructure.SDIO_Argument = 0x00;
    SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_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(SDIO_APP_CMD);
  }
  /* CMD55 */
  SDIO_CmdInitStructure.SDIO_Argument = 0x00;
  SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_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(SDIO_APP_CMD);

  /* If errorstatus is Command TimeOut, it is a MMC card */
  /* If errorstatus is SD_OK it is a SD card: SD card 2.0 (voltage range mismatch)
     or SD card 1.x */
  if (errorstatus == SD_OK)
  {
    /* SD CARD */
    /* Send ACMD41 SD_APP_OP_COND with Argument 0x80100000 */
    while ((!validvoltage) && (count < SD_MAX_VOLT_TRIAL))
    {

      /* SEND CMD55 APP_CMD with RCA as 0 */
      SDIO_CmdInitStructure.SDIO_Argument = 0x00;
      SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_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(SDIO_APP_CMD);

      if (errorstatus != SD_OK)
      {
        return(errorstatus);
      }
      SDIO_CmdInitStructure.SDIO_Argument = SD_VOLTAGE_WINDOW_SD | SDType;
      SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_SD_APP_OP_COND;
      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 = CmdResp3Error();
      if (errorstatus != SD_OK)
      {
        return(errorstatus);
      }

      response = SDIO_GetResponse(SDIO_RESP1);
      validvoltage = (bool) (((response >> 31) == 1) ? 1 : 0);
      count++;
    }
    if (count >= SD_MAX_VOLT_TRIAL)
    {
      errorstatus = SD_INVALID_VOLTRANGE;
      return(errorstatus);
    }

    if (response &= SD_HIGH_CAPACITY)
    {
      CardType = SDIO_HIGH_CAPACITY_SD_CARD;
    }

  }/* else MMC Card */

  return(errorstatus);
}

/**
  * @brief  Turns the SDIO output signals off.
  * @param  None
  * @retval SD_Error: SD Card Error code.
  */
SD_Error SD_PowerOFF(void)
{
  SD_Error errorstatus = SD_OK;

  /* Set Power State to OFF */
  SDIO_SetPowerState(SDIO_PowerState_OFF);

  return(errorstatus);
}

/**
  * @brief  Intialises all cards or single card as the case may be.
  *   Card(s) come into standby state.
  * @param  None
  * @retval SD_Error: SD Card Error code.
  */
SD_Error SD_InitializeCards(void)
{
  SD_Error errorstatus = SD_OK;
  uint16_t rca = 0x01;

  if (SDIO_GetPowerState() == SDIO_PowerState_OFF)
  {
    errorstatus = SD_REQUEST_NOT_APPLICABLE;
    return(errorstatus);
  }

  if (SDIO_SECURE_DIGITAL_IO_CARD != CardType)
  {
    /* Send CMD2 ALL_SEND_CID */
    SDIO_CmdInitStructure.SDIO_Argument = 0x0;
    SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_ALL_SEND_CID;
    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);
    }

    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_STD_CAPACITY_SD_CARD_V1_1 == CardType) ||  (SDIO_STD_CAPACITY_SD_CARD_V2_0 == 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 = (uint32_t)(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);
}

/**
  * @brief  Returns information about specific card.
  * @param  cardinfo : pointer to a SD_CardInfo structure
  *   that contains all SD card information.
  * @retval SD_Error: SD Card Error code.
  */
SD_Error SD_GetCardInfo(SD_CardInfo *cardinfo)
{
  SD_Error errorstatus = SD_OK;
  uint8_t tmp = 0;

  cardinfo->CardType = (uint8_t)CardType;
  cardinfo->RCA = (uint16_t)RCA;

  /* Byte 0 */
  tmp = (uint8_t)((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 = (uint8_t)((CSD_Tab[0] & 0x00FF0000) >> 16);
  cardinfo->SD_csd.TAAC = tmp;

  /* Byte 2 */
  tmp = (uint8_t)((CSD_Tab[0] & 0x0000FF00) >> 8);
  cardinfo->SD_csd.NSAC = tmp;

  /* Byte 3 */
  tmp = (uint8_t)(CSD_Tab[0] & 0x000000FF);
  cardinfo->SD_csd.MaxBusClkFrec = tmp;

  /* Byte 4 */
  tmp = (uint8_t)((CSD_Tab[1] & 0xFF000000) >> 24);
  cardinfo->SD_csd.CardComdClasses = tmp << 4;

  /* Byte 5 */
  tmp = (uint8_t)((CSD_Tab[1] & 0x00FF0000) >> 16);
  cardinfo->SD_csd.CardComdClasses |= (tmp & 0xF0) >> 4;
  cardinfo->SD_csd.RdBlockLen = tmp & 0x0F;

  /* Byte 6 */
  tmp = (uint8_t)((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 */

  if ((CardType == SDIO_STD_CAPACITY_SD_CARD_V1_1) || (CardType == SDIO_STD_CAPACITY_SD_CARD_V2_0))
  {
    cardinfo->SD_csd.DeviceSize = (tmp & 0x03) << 10;

    /* Byte 7 */
    tmp = (uint8_t)(CSD_Tab[1] & 0x000000FF);
    cardinfo->SD_csd.DeviceSize |= (tmp) << 2;

    /* Byte 8 */
    tmp = (uint8_t)((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 = (uint8_t)((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 = (uint8_t)((CSD_Tab[2] & 0x0000FF00) >> 8);
    cardinfo->SD_csd.DeviceSizeMul |= (tmp & 0x80) >> 7;
   
    cardinfo->CardCapacity = (cardinfo->SD_csd.DeviceSize + 1) ;
    cardinfo->CardCapacity *= (1 << (cardinfo->SD_csd.DeviceSizeMul + 2));
    cardinfo->CardBlockSize = 1 << (cardinfo->SD_csd.RdBlockLen);
    cardinfo->CardCapacity *= cardinfo->CardBlockSize;
  }
  else if (CardType == SDIO_HIGH_CAPACITY_SD_CARD)
  {
    /* Byte 7 */
    tmp = (uint8_t)(CSD_Tab[1] & 0x000000FF);
    cardinfo->SD_csd.DeviceSize = (tmp & 0x3F) << 16;

    /* Byte 8 */
    tmp = (uint8_t)((CSD_Tab[2] & 0xFF000000) >> 24);

    cardinfo->SD_csd.DeviceSize |= (tmp << 8);

    /* Byte 9 */
    tmp = (uint8_t)((CSD_Tab[2] & 0x00FF0000) >> 16);

    cardinfo->SD_csd.DeviceSize |= (tmp);

    /* Byte 10 */
    tmp = (uint8_t)((CSD_Tab[2] & 0x0000FF00) >> 8);
   
    cardinfo->CardCapacity = (cardinfo->SD_csd.DeviceSize + 1) * 512 * 1024;
    cardinfo->CardBlockSize = 512;   
  }


  cardinfo->SD_csd.EraseGrSize = (tmp & 0x40) >> 6;
  cardinfo->SD_csd.EraseGrMul = (tmp & 0x3F) << 1;

  /* Byte 11 */
  tmp = (uint8_t)(CSD_Tab[2] & 0x000000FF);
  cardinfo->SD_csd.EraseGrMul |= (tmp & 0x80) >> 7;
  cardinfo->SD_csd.WrProtectGrSize = (tmp & 0x7F);

  /* Byte 12 */
  tmp = (uint8_t)((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 = (uint8_t)((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 = (uint8_t)((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 = (uint8_t)(CSD_Tab[3] & 0x000000FF);
  cardinfo->SD_csd.CSD_CRC = (tmp & 0xFE) >> 1;
  cardinfo->SD_csd.Reserved4 = 1;


  /* Byte 0 */
  tmp = (uint8_t)((CID_Tab[0] & 0xFF000000) >> 24);
  cardinfo->SD_cid.ManufacturerID = tmp;

  /* Byte 1 */
  tmp = (uint8_t)((CID_Tab[0] & 0x00FF0000) >> 16);
  cardinfo->SD_cid.OEM_AppliID = tmp << 8;

  /* Byte 2 */
  tmp = (uint8_t)((CID_Tab[0] & 0x000000FF00) >> 8);
  cardinfo->SD_cid.OEM_AppliID |= tmp;

  /* Byte 3 */
  tmp = (uint8_t)(CID_Tab[0] & 0x000000FF);
  cardinfo->SD_cid.ProdName1 = tmp << 24;

  /* Byte 4 */
  tmp = (uint8_t)((CID_Tab[1] & 0xFF000000) >> 24);
  cardinfo->SD_cid.ProdName1 |= tmp << 16;

  /* Byte 5 */
  tmp = (uint8_t)((CID_Tab[1] & 0x00FF0000) >> 16);
  cardinfo->SD_cid.ProdName1 |= tmp << 8;

  /* Byte 6 */
  tmp = (uint8_t)((CID_Tab[1] & 0x0000FF00) >> 8);
  cardinfo->SD_cid.ProdName1 |= tmp;

  /* Byte 7 */
  tmp = (uint8_t)(CID_Tab[1] & 0x000000FF);
  cardinfo->SD_cid.ProdName2 = tmp;

  /* Byte 8 */
  tmp = (uint8_t)((CID_Tab[2] & 0xFF000000) >> 24);
  cardinfo->SD_cid.ProdRev = tmp;

  /* Byte 9 */
  tmp = (uint8_t)((CID_Tab[2] & 0x00FF0000) >> 16);
  cardinfo->SD_cid.ProdSN = tmp << 24;

  /* Byte 10 */
  tmp = (uint8_t)((CID_Tab[2] & 0x0000FF00) >> 8);
  cardinfo->SD_cid.ProdSN |= tmp << 16;

  /* Byte 11 */
  tmp = (uint8_t)(CID_Tab[2] & 0x000000FF);
  cardinfo->SD_cid.ProdSN |= tmp << 8;

  /* Byte 12 */
  tmp = (uint8_t)((CID_Tab[3] & 0xFF000000) >> 24);
  cardinfo->SD_cid.ProdSN |= tmp;

  /* Byte 13 */
  tmp = (uint8_t)((CID_Tab[3] & 0x00FF0000) >> 16);
  cardinfo->SD_cid.Reserved1 |= (tmp & 0xF0) >> 4;
  cardinfo->SD_cid.ManufactDate = (tmp & 0x0F) << 8;

  /* Byte 14 */
  tmp = (uint8_t)((CID_Tab[3] & 0x0000FF00) >> 8);
  cardinfo->SD_cid.ManufactDate |= tmp;

  /* Byte 15 */
  tmp = (uint8_t)(CID_Tab[3] & 0x000000FF);
  cardinfo->SD_cid.CID_CRC = (tmp & 0xFE) >> 1;
  cardinfo->SD_cid.Reserved2 = 1;
 
  return(errorstatus);
}

/**
  * @brief  Enables wide bus opeartion for the requeseted card if
  *   supported by card.
  * @param  WideMode: Specifies the SD card wide bus mode.
  *   This parameter can be one of the following values:
  *     @arg SDIO_BusWide_8b: 8-bit data transfer (Only for MMC)
  *     @arg SDIO_BusWide_4b: 4-bit data transfer
  *     @arg SDIO_BusWide_1b: 1-bit data transfer
  * @retval SD_Error: SD Card Error code.
  */
SD_Error SD_EnableWideBusOperation(uint32_t 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_STD_CAPACITY_SD_CARD_V1_1 == CardType) || (SDIO_STD_CAPACITY_SD_CARD_V2_0 == 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);
}

/**
  * @brief  Sets device mode whether to operate in Polling, Interrupt or
  *   DMA mode.
  * @param  Mode: Specifies the Data Transfer mode.
  *   This parameter can be one of the following values:
  *     @arg SD_DMA_MODE: Data transfer using DMA.
  *     @arg SD_INTERRUPT_MODE: Data transfer using interrupts.
  *     @arg SD_POLLING_MODE: Data transfer using flags.
  * @retval SD_Error: SD Card Error code.
  */
SD_Error SD_SetDeviceMode(uint32_t 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);

}

/**
  * @brief  Selects od Deselects the corresponding card.
  * @param  addr: Address of the Card to be selected.
  * @retval SD_Error: SD Card Error code.
  */
SD_Error SD_SelectDeselect(uint32_t 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);
}

/**
  * @brief  Allows to read one block from a specified address in a card.
  * @param  addr: Address from where data are to be read.
  * @param  readbuff: pointer to the buffer that will contain the
  *   received data
  * @param  BlockSize: the SD card Data block size.
  * @retval SD_Error: SD Card Error code.
  */
SD_Error SD_ReadBlock(uint32_t addr, uint32_t *readbuff, uint16_t BlockSize)
{
  SD_Error errorstatus = SD_OK;
  uint32_t count = 0, *tempbuff = readbuff;
  uint8_t power = 0;

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

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

  /* Clear all DPSM configuration */
  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 (CardType == SDIO_HIGH_CAPACITY_SD_CARD)
  {
    BlockSize = 512;
    addr /= 512;
  }
  if ((BlockSize > 0) && (BlockSize <= 2048) && ((BlockSize & (BlockSize - 1)) == 0))
  {
    power = convert_from_bytes_to_power_of_two(BlockSize);

    /* Set Block Size for Card */
    SDIO_CmdInitStructure.SDIO_Argument = (uint32_t) 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 = (uint32_t) 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;

  /* Send CMD17 READ_SINGLE_BLOCK */
  SDIO_CmdInitStructure.SDIO_Argument = (uint32_t)addr;
  SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_READ_SINGLE_BLOCK;
  SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
  SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
  //SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_Pend;
  SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
  SDIO_SendCommand(&SDIO_CmdInitStructure);

  errorstatus = CmdResp1Error(SDIO_READ_SINGLE_BLOCK);

  if (errorstatus != SD_OK)
  {
    return(errorstatus);
  }
  /* In case of single block transfer, no need of stop transfer at all.*/
  if (DeviceMode == SD_POLLING_MODE)
  {
    /* 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);
  }
  else if (DeviceMode == SD_INTERRUPT_MODE)
  {
    SDIO_ITConfig(SDIO_IT_DCRCFAIL | SDIO_IT_DTIMEOUT | SDIO_IT_DATAEND | SDIO_IT_RXOVERR | SDIO_IT_RXFIFOHF | SDIO_IT_STBITERR, ENABLE);
    while ((TransferEnd == 0) && (TransferError == SD_OK))
    {}
    if (TransferError != SD_OK)
    {
      return(TransferError);
    }
  }
  else if (DeviceMode == SD_DMA_MODE)
  {
    SDIO_ITConfig(SDIO_IT_DCRCFAIL | SDIO_IT_DTIMEOUT | SDIO_IT_DATAEND | SDIO_IT_RXOVERR | SDIO_IT_STBITERR, ENABLE);
    SDIO_DMACmd(ENABLE);
    DMA_RxConfiguration(readbuff, BlockSize);
    while (DMA_GetFlagStatus(DMA2_FLAG_TC4) == RESET)
    {}
  }
  return(errorstatus);
}

/**
  * @brief  Allows to read blocks from a specified address  in a card.
  * @param  addr: Address from where data are to be read.
  * @param  readbuff: pointer to the buffer that will contain the
  *   received data.
  * @param  BlockSize: the SD card Data block size.
  * @param  NumberOfBlocks: number of blocks to be read.
  * @retval SD_Error: SD Card Error code.
  */
SD_Error SD_ReadMultiBlocks(uint32_t addr, uint32_t *readbuff, uint16_t BlockSize, uint32_t NumberOfBlocks)
{
  SD_Error errorstatus = SD_OK;
  uint32_t count = 0, *tempbuff = readbuff;
  uint8_t power = 0;

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

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

  /* Clear all DPSM configuration */
  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 (CardType == SDIO_HIGH_CAPACITY_SD_CARD)
  {
    BlockSize = 512;
    addr /= 512;
  }
 
  if ((BlockSize > 0) && (BlockSize <= 2048) && (0 == (BlockSize & (BlockSize - 1))))
  {
    power = convert_from_bytes_to_power_of_two(BlockSize);

    /* Set Block Size for Card */
    SDIO_CmdInitStructure.SDIO_Argument = (uint32_t) 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);
  }

  if (NumberOfBlocks > 1)
  {
    /* Common to all modes */
    if (NumberOfBlocks * BlockSize > SD_MAX_DATA_LENGTH)
    {
      errorstatus = SD_INVALID_PARAMETER;
      return(errorstatus);
    }

    TotalNumberOfBytes = NumberOfBlocks * BlockSize;
    StopCondition = 1;
    DestBuffer = readbuff;

    SDIO_DataInitStructure.SDIO_DataTimeOut = SD_DATATIMEOUT;
    SDIO_DataInitStructure.SDIO_DataLength = NumberOfBlocks * BlockSize;
    SDIO_DataInitStructure.SDIO_DataBlockSize = (uint32_t) 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);

    /* Send CMD18 READ_MULT_BLOCK with argument data address */
    SDIO_CmdInitStructure.SDIO_Argument = (uint32_t)addr;
    SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_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(SDIO_READ_MULT_BLOCK);

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

    if (DeviceMode == SD_POLLING_MODE)
    {
      /* Polling mode */
      while (!(SDIO->STA &(SDIO_FLAG_RXOVERR | SDIO_FLAG_DCRCFAIL | SDIO_FLAG_DATAEND | SDIO_FLAG_DTIMEOUT | SDIO_FLAG_STBITERR)))
      {
        if (SDIO_GetFlagStatus(SDIO_FLAG_RXFIFOHF) != RESET)
        {
          for (count = 0; count < SD_HALFFIFO; count++)
          {
            *(tempbuff + count) = SDIO_ReadData();
          }
          tempbuff += SD_HALFFIFO;
        }
      }

      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++;
      }

      if (SDIO_GetFlagStatus(SDIO_FLAG_DATAEND) != RESET)
      {
        /* In Case Of SD-CARD Send Command STOP_TRANSMISSION */
        if ((SDIO_STD_CAPACITY_SD_CARD_V1_1 == CardType) || (SDIO_HIGH_CAPACITY_SD_CARD == CardType) || (SDIO_STD_CAPACITY_SD_CARD_V2_0 == CardType))
        {
          /* Send CMD12 STOP_TRANSMISSION */
          SDIO_CmdInitStructure.SDIO_Argument = 0x0;
          SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_STOP_TRANSMISSION;
          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_STOP_TRANSMISSION);

          if (errorstatus != SD_OK)
          {
            return(errorstatus);
          }
        }
      }
      /* Clear all the static flags */
      SDIO_ClearFlag(SDIO_STATIC_FLAGS);
    }
    else if (DeviceMode == SD_INTERRUPT_MODE)
    {
      SDIO_ITConfig(SDIO_IT_DCRCFAIL | SDIO_IT_DTIMEOUT | SDIO_IT_DATAEND | SDIO_IT_RXOVERR | SDIO_IT_RXFIFOHF | SDIO_IT_STBITERR, ENABLE);
      while ((TransferEnd == 0) && (TransferError == SD_OK))
      {}
      if (TransferError != SD_OK)
      {
        return(TransferError);
      }
    }
    else if (DeviceMode == SD_DMA_MODE)
    {
      SDIO_ITConfig(SDIO_IT_DCRCFAIL | SDIO_IT_DTIMEOUT | SDIO_IT_DATAEND | SDIO_IT_RXOVERR | SDIO_IT_STBITERR, ENABLE);
      SDIO_DMACmd(ENABLE);
      DMA_RxConfiguration(readbuff, (NumberOfBlocks * BlockSize));
      while (DMA_GetFlagStatus(DMA2_FLAG_TC4) == RESET)
      {}
      while ((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.
  * @param  addr: 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.
  * @retval SD_Error: SD Card Error code.
  */
SD_Error SD_WriteBlock(uint32_t addr, uint32_t *writebuff, uint16_t BlockSize)
{
  SD_Error errorstatus = SD_OK;
  uint8_t  power = 0, cardstate = 0;
  uint32_t timeout = 0, bytestransferred = 0;
  uint32_t cardstatus = 0, count = 0, restwords = 0;
  uint32_t *tempbuff = writebuff;

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

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

  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 (CardType == SDIO_HIGH_CAPACITY_SD_CARD)
  {
    BlockSize = 512;
    addr /= 512;
  }
 
  /* Set the block size, both on controller and card */
  if ((BlockSize > 0) && (BlockSize <= 2048) && ((BlockSize & (BlockSize - 1)) == 0))
  {
    power = convert_from_bytes_to_power_of_two(BlockSize);

    SDIO_CmdInitStructure.SDIO_Argument = (uint32_t) 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 (errorstatus != SD_OK)
    {
      return(errorstatus);
    }
  }
  else
  {
    errorstatus = SD_INVALID_PARAMETER;
    return(errorstatus);
  }

  /* Wait till card is ready for data Added */
  SDIO_CmdInitStructure.SDIO_Argument = (uint32_t) (RCA << 16);
  SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_SEND_STATUS;
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