armfly/User/Bsp/sdio/sdcard.c

/**
 ******************************************************************************
 * @file    stm324xg_eval_sdio_sd.c
 * @author  MCD Application Team
 * @version V1.0.2
 * @date    09-March-2012
 * @brief   This file provides a set of functions needed to manage the SDIO SD
 *          Card memory mounted on STM324xG-EVAL evaluation board.
 *
 *
 *  @verbatim
 *
 *          ===================================================================
 *                                   How to use this driver
 *          ===================================================================
 *          It implements a high level communication layer for read and write
 *          from/to this memory. The needed STM32 hardware resources (SDIO and
 *          GPIO) are defined in stm324xg_eval.h file, and the initialization is
 *          performed in SD_LowLevel_Init() function declared in stm324xg_eval.c
 *          file.
 *          You can easily tailor this driver to any other development board,
 *          by just adapting the defines for hardware resources and
 *          SD_LowLevel_Init() function.
 *
 *          A - SD Card Initialization and configuration
 *          ============================================
 *            - To initialize the SD Card, use the SD_Init() function.  It
 *              Initializes the SD Card and put it into StandBy State (Ready
 *              for data transfer). This function provide the following operations:
 *
 *              1 - Apply the SD Card initialization process at 400KHz and check
 *                  the SD Card type (Standard Capacity or High Capacity). You
 *                  can change or adapt this frequency by adjusting the
 *                  "SDIO_INIT_CLK_DIV" define inside the stm324xg_eval.h file.
 *                  The SD Card frequency (SDIO_CK) is computed as follows:
 *
 *                     +---------------------------------------------+
 *                     | SDIO_CK = SDIOCLK / (SDIO_INIT_CLK_DIV + 2) |
 *                     +---------------------------------------------+
 *
 *                  In initialization mode and according to the SD Card standard,
 *                  make sure that the SDIO_CK frequency don't exceed 400KHz.
 *
 *              2 - Get the SD CID and CSD data. All these information are
 *                  managed by the SDCardInfo structure. This structure provide
 *                  also ready computed SD Card capacity and Block size.
 *
 *              3 - Configure the SD Card Data transfer frequency. By Default,
 *                  the card transfer frequency is set to 24MHz. You can change
 *                  or adapt this frequency by adjusting the "SDIO_TRANSFER_CLK_DIV"
 *                  define inside the stm324xg_eval.h file.
 *                  The SD Card frequency (SDIO_CK) is computed as follows:
 *
 *                     +---------------------------------------------+
 *                     | SDIO_CK = SDIOCLK / (SDIO_INIT_CLK_DIV + 2) |
 *                     +---------------------------------------------+
 *
 *                  In transfer mode and according to the SD Card standard,
 *                  make sure that the SDIO_CK frequency don't exceed 25MHz
 *                  and 50MHz in High-speed mode switch.
 *                  To be able to use a frequency higher than 24MHz, you should
 *                  use the SDIO peripheral in bypass mode. Refer to the
 *                  corresponding reference manual for more details.
 *
 *              4 -  Select the corresponding SD Card according to the address
 *                   read with the step 2.
 *
 *              5 -  Configure the SD Card in wide bus mode: 4-bits data.
 *
 *          B - SD Card Read operation
 *          ==========================
 *           - You can read SD card by using two function: SD_ReadBlock() and
 *             SD_ReadMultiBlocks() functions. These functions support only
 *             512-byte block length.
 *           - The SD_ReadBlock() function read only one block (512-byte). This
 *             function can transfer the data using DMA controller or using
 *             polling mode. To select between DMA or polling mode refer to
 *             "SD_DMA_MODE" or "SD_POLLING_MODE" inside the stm324xg_eval_sdio_sd.h
 *             file and uncomment the corresponding line. By default the SD DMA
 *             mode is selected
 *           - The SD_ReadMultiBlocks() function read only mutli blocks (multiple
 *             of 512-byte).
 *           - Any read 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.
 *
 *           - The DMA transfer is finished by the SDIO Data End interrupt.
 *             User has to call the SD_ProcessIRQ() function inside the SDIO_IRQHandler()
 *             and SD_ProcessDMAIRQ() function inside the DMA2_Streamx_IRQHandler().
 *             Don't forget to enable the SDIO_IRQn and DMA2_Stream3_IRQn or
 *             DMA2_Stream6_IRQn interrupts using the NVIC controller.
 *
 *          C - SD Card Write operation
 *          ===========================
 *           - You can write SD card by using two function: SD_WriteBlock() and
 *             SD_WriteMultiBlocks() functions. These functions support only
 *             512-byte block length.
 *           - The SD_WriteBlock() function write only one block (512-byte). This
 *             function can transfer the data using DMA controller or using
 *             polling mode. To select between DMA or polling mode refer to
 *             "SD_DMA_MODE" or "SD_POLLING_MODE" inside the stm324xg_eval_sdio_sd.h
 *             file and uncomment the corresponding line. By default the SD DMA
 *             mode is selected
 *           - The SD_WriteMultiBlocks() function write only mutli blocks (multiple
 *             of 512-byte).
 *           - Any write 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.
 *
 *           - The DMA transfer is finished by the SDIO Data End interrupt.
 *             User has to call the SD_ProcessIRQ() function inside the SDIO_IRQHandler()
 *             and SD_ProcessDMAIRQ() function inside the DMA2_Streamx_IRQHandler().
 *             Don't forget to enable the SDIO_IRQn and DMA2_Stream3_IRQn or
 *             DMA2_Stream6_IRQn interrupts using the NVIC controller.
 *
 *
 *          D - SD card status
 *          ==================
 *           - At any time, you can check the SD Card status and get the SD card
 *             state by using the SD_GetStatus() function. This function checks
 *             first if the SD card is still connected and then get the internal
 *             SD Card transfer state.
 *           - You can also get the SD card SD Status register by using the
 *             SD_SendSDStatus() function.
 *
 *          E - Programming Model (Selecting DMA for SDIO data Transfer)
 *          ============================================================
 *             Status = SD_Init(); // Initialization Step as described in section A
 *
 *             // SDIO Interrupt ENABLE
 *             NVIC_InitStructure.NVIC_IRQChannel = SDIO_IRQn;
 *             NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
 *             NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
 *             NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
 *             NVIC_Init(&NVIC_InitStructure);
 *             // DMA2 STREAMx Interrupt ENABLE
 *             NVIC_InitStructure.NVIC_IRQChannel = SD_SDIO_DMA_IRQn;
 *             NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
 *             NVIC_Init(&NVIC_InitStructure);
 *
 *             // Write operation as described in Section C
 *             Status = SD_WriteBlock(buffer, address, 512);
 *             Status = SD_WaitWriteOperation();
 *             while(SD_GetStatus() != SD_TRANSFER_OK);
 *
 *             Status = SD_WriteMultiBlocks(buffer, address, 512, NUMBEROFBLOCKS);
 *             Status = SD_WaitWriteOperation();
 *             while(SD_GetStatus() != SD_TRANSFER_OK);
 *
 *             // Read operation as described in Section B
 *             Status = SD_ReadBlock(buffer, address, 512);
 *             Status = SD_WaitReadOperation();
 *             while(SD_GetStatus() != SD_TRANSFER_OK);
 *
 *             Status = SD_ReadMultiBlocks(buffer, address, 512, NUMBEROFBLOCKS);
 *             Status = SD_WaitReadOperation();
 *             while(SD_GetStatus() != SD_TRANSFER_OK);
 *
 *             - Add the SDIO and DMA2 StreamX (3 or 6) IRQ Handlers:
 *                 void SDIO_IRQHandler(void)
 *                 {
 *                   SD_ProcessIRQ();
 *                 }
 *                 void SD_SDIO_DMA_IRQHANDLER(void)
 *                 {
 *                   SD_ProcessDMAIRQ();
 *                 }
 *
 *          F - Programming Model (Selecting Polling for SDIO data Transfer)
 *          ================================================================
 *            //Only SD Card Single Block operation are managed.
 *            Status = SD_Init(); // Initialization Step as described in section
 *
 *            // Write operation as described in Section C
 *            Status = SD_WriteBlock(buffer, address, 512);
 *
 *            // Read operation as described in Section B
 *            Status = SD_ReadBlock(buffer, address, 512);
 *
 *          STM32 SDIO Pin assignment
 *          =========================
 *          +-----------------------------------------------------------+
 *          |                     Pin assignment                        |
 *          +-----------------------------+---------------+-------------+
 *          |  STM32 SDIO Pins            |     SD        |    Pin      |
 *          +-----------------------------+---------------+-------------+
 *          |      SDIO D2                |   D2          |    1        |
 *          |      SDIO D3                |   D3          |    2        |
 *          |      SDIO CMD               |   CMD         |    3        |
 *          |                             |   VCC         |    4 (3.3 V)|
 *          |      SDIO CLK               |   CLK         |    5        |
 *          |                             |   GND         |    6 (0 V)  |
 *          |      SDIO D0                |   D0          |    7        |
 *          |      SDIO D1                |   D1          |    8        |
 *          +-----------------------------+---------------+-------------+
 *
 *  @endverbatim
 *
 ******************************************************************************
 * @attention
 *
 * <h2><center>&copy; COPYRIGHT 2012 STMicroelectronics</center></h2>
 *
 * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
 * You may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *        http://www.st.com/software_license_agreement_liberty_v2
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 ******************************************************************************
 */

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

/** @addtogroup Utilities
 * @{
 */

/** @addtogroup STM32_EVAL
 * @{
 */

/** @addtogroup STM324xG_EVAL
 * @{
 */

/** @addtogroup STM324xG_EVAL_SDIO_SD
 * @brief      This file provides all the SD Card driver firmware functions.
 * @{
 */

/** @defgroup STM324xG_EVAL_SDIO_SD_Private_Types
 * @{
 */
/**
 * @}
 */

/** @defgroup STM324xG_EVAL_SDIO_SD_Private_Defines
 * @{
 */

/**
 * @brief  SDIO Static flags, TimeOut, FIFO Address
 */
#define NULL              0
#define SDIO_STATIC_FLAGS ((uint32_t)0x000005FF)
#define SDIO_CMD0TIMEOUT  ((uint32_t)0x00010000)

/**
 * @brief  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)

/**
 * @brief  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_DATATIMEOUT     ((uint32_t)0xFFFFFFFF)
#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)

/**
 * @brief  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)

/**
 * @brief  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)

/**
 * @}
 */

/** @defgroup STM324xG_EVAL_SDIO_SD_Private_Macros
 * @{
 */
/**
 * @}
 */

/** @defgroup STM324xG_EVAL_SDIO_SD_Private_Variables
 * @{
 */

static uint32_t CardType = SDIO_STD_CAPACITY_SD_CARD_V1_1;
static uint32_t CSD_Tab[4], CID_Tab[4], RCA = 0;
static uint8_t  SDSTATUS_Tab[16];
__IO uint32_t   StopCondition = 0;
__IO SD_Error   TransferError = SD_OK;
__IO uint32_t   TransferEnd = 0, DMAEndOfTransfer = 0;
SD_CardInfo     SDCardInfo;

SDIO_InitTypeDef     SDIO_InitStructure;
SDIO_CmdInitTypeDef  SDIO_CmdInitStructure;
SDIO_DataInitTypeDef SDIO_DataInitStructure;
/**
 * @}
 */

/** @defgroup STM324xG_EVAL_SDIO_SD_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);
uint8_t         convert_from_bytes_to_power_of_two(uint16_t NumberOfBytes);

/**
 * @}
 */

/** @defgroup STM324xG_EVAL_SDIO_SD_Private_Functions
 * @{
 */

/**
 * @brief  DeInitializes the SDIO interface.
 * @param  None
 * @retval None
 */
void SD_DeInit(void)
{
    SD_LowLevel_DeInit();
}

/**
 * @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)
{
    __IO SD_Error errorstatus = SD_OK;

    /* 配置NVIC */
    SDIO_Interrupts_Config();

    /* SDIO Peripheral Low Level Init */
    SD_LowLevel_Init();

    SDIO_DeInit();

    errorstatus = SD_PowerON();

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

    errorstatus = SD_InitializeCards();

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

    /*!< Configure the SDIO peripheral */
    /*!< SDIO_CK = SDIOCLK / (SDIO_TRANSFER_CLK_DIV + 2) */
    /*!< on STM32F4xx devices, SDIOCLK is fixed to 48MHz */
    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);

    /*----------------- Read CSD/CID MSD registers ------------------*/
    errorstatus = SD_GetCardInfo(&SDCardInfo);

    if (errorstatus == SD_OK)
    {
        /*----------------- Select Card --------------------------------*/
        errorstatus = SD_SelectDeselect((uint32_t)(SDCardInfo.RCA << 16));
    }

    if (errorstatus == SD_OK)
    {
        errorstatus = SD_EnableWideBusOperation(SDIO_BusWide_4b);
    }

    return (errorstatus);
}

/**
 * @brief  Gets the cuurent sd card data transfer status.
 * @param  None
 * @retval SDTransferState: Data Transfer state.
 *   This value can be:
 *        - SD_TRANSFER_OK: No data transfer is acting
 *        - SD_TRANSFER_BUSY: Data transfer is acting
 */
SDTransferState SD_GetStatus(void)
{
    SDCardState cardstate = SD_CARD_TRANSFER;

    cardstate = SD_GetState();

    if (cardstate == SD_CARD_TRANSFER)
    {
        return (SD_TRANSFER_OK);
    }
    else if (cardstate == SD_CARD_ERROR)
    {
        return (SD_TRANSFER_ERROR);
    }
    else
    {
        return (SD_TRANSFER_BUSY);
    }
}

/**
 * @brief  Returns the current card's state.
 * @param  None
 * @retval SDCardState: SD Card Error or SD Card Current State.
 */
SDCardState SD_GetState(void)
{
    uint32_t resp1 = 0;

    if (SD_Detect() == SD_PRESENT)
    {
        if (SD_SendStatus(&resp1) != SD_OK)
        {
            return SD_CARD_ERROR;
        }
        else
        {
            return (SDCardState)((resp1 >> 9) & 0x0F);
        }
    }
    else
    {
        return SD_CARD_ERROR;
    }
}

/**
 * @brief  Detect if SD card is correctly plugged in the memory slot.
 * @param  None
 * @retval Return if SD is detected or not
 */
uint8_t SD_Detect(void)
{
    __IO uint8_t status = SD_PRESENT;

    /*!< Check GPIO to detect SD */
    if (GPIO_ReadInputDataBit(SD_DETECT_GPIO_PORT, SD_DETECT_PIN) != Bit_RESET)
    {
        status = SD_NOT_PRESENT;
    }
    return status;
}

/**
 * @brief  Enquires cards about their operating voltage and configures
 *   clock controls.
 * @param  None
 * @retval SD_Error: SD Card Error code.
 */
SD_Error SD_PowerON(void)
{
    __IO SD_Error errorstatus = SD_OK;
    uint32_t      response = 0, count = 0, validvoltage = 0;
    uint32_t      SDType = SD_STD_CAPACITY;

    /*!< Power ON Sequence -----------------------------------------------------*/
    /*!< Configure the SDIO peripheral */
    /*!< SDIO_CK = SDIOCLK / (SDIO_INIT_CLK_DIV + 2) */
    /*!< on STM32F4xx devices, SDIOCLK is fixed to 48MHz */
    /*!< SDIO_CK for initialization should not exceed 400 KHz */
    SDIO_InitStructure.SDIO_ClockDiv            = SDIO_INIT_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);

    /*!< Set Power State to ON */
    SDIO_SetPowerState(SDIO_PowerState_ON);

    /*!< Enable SDIO Clock */
    SDIO_ClockCmd(ENABLE);

    /*!< CMD0: GO_IDLE_STATE ---------------------------------------------------*/
    /*!< No CMD response required */
    SDIO_CmdInitStructure.SDIO_Argument = 0x0;
    SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_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);

    errorstatus = CmdError();

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

    /*!< CMD8: SEND_IF_COND ----------------------------------------------------*/
    /*!< Send CMD8 to verify SD card interface operating condition */
    /*!< 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);

    errorstatus = CmdResp7Error();

    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 = 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);
    }
    /*!< CMD55 */
    SDIO_CmdInitStructure.SDIO_Argument = 0x00;
    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 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 = 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);
            }
            SDIO_CmdInitStructure.SDIO_Argument = SD_VOLTAGE_WINDOW_SD | SDType;
            SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_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 = (((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 = SD_CMD_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 = SD_CMD_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(SD_CMD_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 = SD_CMD_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  = (int64_t)(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_GetCardStatus(SD_CardStatus *cardstatus)
{
    SD_Error errorstatus = SD_OK;
    uint8_t  tmp         = 0;

    errorstatus = SD_SendSDStatus((uint32_t *)SDSTATUS_Tab);

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

    /*!< Byte 0 */
    tmp                       = (uint8_t)((SDSTATUS_Tab[0] & 0xC0) >> 6);
    cardstatus->DAT_BUS_WIDTH = tmp;

    /*!< Byte 0 */
    tmp                      = (uint8_t)((SDSTATUS_Tab[0] & 0x20) >> 5);
    cardstatus->SECURED_MODE = tmp;

    /*!< Byte 2 */
    tmp                      = (uint8_t)((SDSTATUS_Tab[2] & 0xFF));
    cardstatus->SD_CARD_TYPE = tmp << 8;

    /*!< Byte 3 */
    tmp = (uint8_t)((SDSTATUS_Tab[3] & 0xFF));
    cardstatus->SD_CARD_TYPE |= tmp;

    /*!< Byte 4 */
    tmp                                = (uint8_t)(SDSTATUS_Tab[4] & 0xFF);
    cardstatus->SIZE_OF_PROTECTED_AREA = tmp << 24;

    /*!< Byte 5 */
    tmp = (uint8_t)(SDSTATUS_Tab[5] & 0xFF);
    cardstatus->SIZE_OF_PROTECTED_AREA |= tmp << 16;

    /*!< Byte 6 */
    tmp = (uint8_t)(SDSTATUS_Tab[6] & 0xFF);
    cardstatus->SIZE_OF_PROTECTED_AREA |= tmp << 8;

    /*!< Byte 7 */
    tmp = (uint8_t)(SDSTATUS_Tab[7] & 0xFF);
    cardstatus->SIZE_OF_PROTECTED_AREA |= tmp;

    /*!< Byte 8 */
    tmp                     = (uint8_t)((SDSTATUS_Tab[8] & 0xFF));
    cardstatus->SPEED_CLASS = tmp;

    /*!< Byte 9 */
    tmp                          = (uint8_t)((SDSTATUS_Tab[9] & 0xFF));
    cardstatus->PERFORMANCE_MOVE = tmp;

    /*!< Byte 10 */
    tmp                 = (uint8_t)((SDSTATUS_Tab[10] & 0xF0) >> 4);
    cardstatus->AU_SIZE = tmp;

    /*!< Byte 11 */
    tmp                    = (uint8_t)(SDSTATUS_Tab[11] & 0xFF);
    cardstatus->ERASE_SIZE = tmp << 8;

    /*!< Byte 12 */
    tmp = (uint8_t)(SDSTATUS_Tab[12] & 0xFF);
    cardstatus->ERASE_SIZE |= tmp;

    /*!< Byte 13 */
    tmp                       = (uint8_t)((SDSTATUS_Tab[13] & 0xFC) >> 2);
    cardstatus->ERASE_TIMEOUT = tmp;

    /*!< Byte 13 */
    tmp                      = (uint8_t)((SDSTATUS_Tab[13] & 0x3));
    cardstatus->ERASE_OFFSET = tmp;

    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  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 = SD_CMD_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(SD_CMD_SEL_DESEL_CARD);

    return (errorstatus);
}

/**
 * @brief  Allows to read one block 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.
 * @retval SD_Error: SD Card Error code.
 */
SD_Error SD_ReadBlock(uint8_t *readbuff, uint32_t ReadAddr, uint16_t BlockSize)
{
    SD_Error errorstatus = SD_OK;
#if defined(SD_POLLING_MODE)
    uint32_t count = 0, *tempbuff = (uint32_t *)readbuff;
#endif

    TransferError = SD_OK;
    TransferEnd   = 0;
    StopCondition = 0;

    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    = 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);
    }
    count = SD_DATATIMEOUT;
    while ((SDIO_GetFlagStatus(SDIO_FLAG_RXDAVL) != RESET) && (count > 0))
    {
        *tempbuff = SDIO_ReadData();
        tempbuff++;
        count--;
    }

    /*!< Clear all the static flags */
    SDIO_ClearFlag(SDIO_STATIC_FLAGS);

#elif defined(SD_DMA_MODE)
    SDIO_ITConfig(SDIO_IT_DCRCFAIL | SDIO_IT_DTIMEOUT | SDIO_IT_DATAEND | SDIO_IT_RXOVERR | SDIO_IT_STBITERR, 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_DCRCFAIL | SDIO_IT_DTIMEOUT | SDIO_IT_DATAEND | SDIO_IT_RXOVERR | SDIO_IT_STBITERR, 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;
    uint32_t timeout;

    timeout = SD_DATATIMEOUT;

    while ((DMAEndOfTransfer == 0x00) && (TransferEnd == 0) && (TransferError == SD_OK) && (timeout > 0))
    {
        timeout--;
    }

    DMAEndOfTransfer = 0x00;

    timeout = SD_DATATIMEOUT;

    while (((SDIO->STA & SDIO_FLAG_RXACT)) && (timeout > 0))
    {
        timeout--;
    }

    if (StopCondition == 1)
    {
        errorstatus   = SD_StopTransfer();
        StopCondition = 0;
    }

    if ((timeout == 0) && (errorstatus == SD_OK))
    {
        errorstatus = SD_DATA_TIMEOUT;
    }

    /*!< Clear all the static flags */
    SDIO_ClearFlag(SDIO_STATIC_FLAGS);

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

    /* 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);
    }

    /*!< 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_DCRCFAIL | SDIO_IT_DTIMEOUT | SDIO_IT_DATAEND | SDIO_IT_RXOVERR | SDIO_IT_STBITERR, 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;

    TransferError = SD_OK;
    TransferEnd   = 0;
    StopCondition = 1;

    SDIO->DCTRL = 0x0;

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

    /*!< 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);

    SDIO_ITConfig(SDIO_IT_DCRCFAIL | SDIO_IT_DTIMEOUT | SDIO_IT_DATAEND | SDIO_IT_RXOVERR | SDIO_IT_STBITERR, ENABLE);
    SDIO_DMACmd(ENABLE);
    SD_LowLevel_DMA_TxConfig((uint32_t *)writebuff, (NumberOfBlocks * BlockSize));

    return (errorstatus);
}

/**
 * @brief  This function waits until the SDIO DMA data transfer is finished.
 *         This function should be called after SDIO_WriteBlock() and
 *         SDIO_WriteMultiBlocks() 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_WaitWriteOperation(void)
{
    SD_Error errorstatus = SD_OK;
    uint32_t timeout;

    timeout = SD_DATATIMEOUT;

    while ((DMAEndOfTransfer == 0x00) && (TransferEnd == 0) && (TransferError == SD_OK) && (timeout > 0))
    {
        timeout--;
    }

    DMAEndOfTransfer = 0x00;

    timeout = SD_DATATIMEOUT;

    while (((SDIO->STA & SDIO_FLAG_TXACT)) && (timeout > 0))
    {
        timeout--;
    }

    if (StopCondition == 1)
    {
        errorstatus   = SD_StopTransfer();
        StopCondition = 0;
    }

    if ((timeout == 0) && (errorstatus == SD_OK))
    {
        errorstatus = SD_DATA_TIMEOUT;
    }

    /*!< Clear all the static flags */
    SDIO_ClearFlag(SDIO_STATIC_FLAGS);

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

/**
 * @brief  Gets the cuurent data transfer state.
 * @param  None
 * @retval SDTransferState: Data Transfer state.
 *   This value can be:
 *        - SD_TRANSFER_OK: No data transfer is acting
 *        - SD_TRANSFER_BUSY: Data transfer is acting
 */
SDTransferState SD_GetTransferState(void)
{
    if (SDIO->STA & (SDIO_FLAG_TXACT | SDIO_FLAG_RXACT))
    {
        return (SD_TRANSFER_BUSY);
    }
    else
    {
        return (SD_TRANSFER_OK);
    }
}

/**
 * @brief  Aborts an ongoing data transfer.
 * @param  None
 * @retval SD_Error: SD Card Error code.
 */
SD_Error SD_StopTransfer(void)
{
    SD_Error errorstatus = SD_OK;

    /*!< Send CMD12 STOP_TRANSMISSION  */
    SDIO_CmdInitStructure.SDIO_Argument = 0x0;
    SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_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(SD_CMD_STOP_TRANSMISSION);

    return (errorstatus);
}

/**
 * @brief  Allows to erase memory area specified for the given card.
 * @param  startaddr: the start address.
 * @param  endaddr: the end address.
 * @retval SD_Error: SD Card Error code.
 */
SD_Error SD_Erase(uint32_t startaddr, uint32_t endaddr)
{
    SD_Error      errorstatus = SD_OK;
    uint32_t      delay       = 0;
    __IO uint32_t maxdelay    = 0;
    uint8_t       cardstate   = 0;

    /*!< Check if the card coomnd class supports erase command */
    if (((CSD_Tab[1] >> 20) & SD_CCCC_ERASE) == 0)
    {
        errorstatus = SD_REQUEST_NOT_APPLICABLE;
        return (errorstatus);
    }

    maxdelay = 120000 / ((SDIO->CLKCR & 0xFF) + 2);

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

    if (CardType == SDIO_HIGH_CAPACITY_SD_CARD)
    {
        startaddr /= 512;
        endaddr /= 512;
    }

    /*!< According to sd-card spec 1.0 ERASE_GROUP_START (CMD32) and erase_group_end(CMD33) */
    if ((SDIO_STD_CAPACITY_SD_CARD_V1_1 == CardType) || (SDIO_STD_CAPACITY_SD_CARD_V2_0 == CardType) || (SDIO_HIGH_CAPACITY_SD_CARD == CardType))
    {
        /*!< Send CMD32 SD_ERASE_GRP_START with argument as addr  */
        SDIO_CmdInitStructure.SDIO_Argument = startaddr;
        SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_SD_ERASE_GRP_START;
        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_SD_ERASE_GRP_START);
        if (errorstatus != SD_OK)
        {
            return (errorstatus);
        }

        /*!< Send CMD33 SD_ERASE_GRP_END with argument as addr  */
        SDIO_CmdInitStructure.SDIO_Argument = endaddr;
        SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_SD_ERASE_GRP_END;
        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_SD_ERASE_GRP_END);
        if (errorstatus != SD_OK)
        {
            return (errorstatus);
        }
    }

    /*!< Send CMD38 ERASE */
    SDIO_CmdInitStructure.SDIO_Argument = 0;
    SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_ERASE;
    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_ERASE);

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

    for (delay = 0; delay < maxdelay; delay++)
    {
    }

    /*!< Wait till the card is in programming state */
    errorstatus = IsCardProgramming(&cardstate);
    delay       = SD_DATATIMEOUT;
    while ((delay > 0) && (errorstatus == SD_OK) && ((SD_CARD_PROGRAMMING == cardstate) || (SD_CARD_RECEIVING == cardstate)))
    {
        errorstatus = IsCardProgramming(&cardstate);
        delay--;
    }

    return (errorstatus);
}

/**
 * @brief  Returns the current card's status.
 * @param  pcardstatus: pointer to the buffer that will contain the SD card
 *         status (Card Status register).
 * @retval SD_Error: SD Card Error code.
 */
SD_Error SD_SendStatus(uint32_t *pcardstatus)
{
    SD_Error errorstatus = SD_OK;

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

    SDIO_CmdInitStructure.SDIO_Argument = (uint32_t)RCA << 16;
    SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_SEND_STATUS;
    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_SEND_STATUS);

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

    *pcardstatus = SDIO_GetResponse(SDIO_RESP1);

    return (errorstatus);
}

/**
 * @brief  Returns the current SD card's status.
 * @param  psdstatus: pointer to the buffer that will contain the SD card status
 *         (SD Status register).
 * @retval SD_Error: SD Card Error code.
 */
SD_Error SD_SendSDStatus(uint32_t *psdstatus)
{
    SD_Error errorstatus = SD_OK;
    uint32_t count       = 0;

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

    /*!< Set block size for card if it is not equal to current block size for card. */
    SDIO_CmdInitStructure.SDIO_Argument = 64;
    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 (errorstatus != SD_OK)
    {
        return (errorstatus);
    }

    /*!< CMD55 */
    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);
    }

    SDIO_DataInitStructure.SDIO_DataTimeOut   = SD_DATATIMEOUT;
    SDIO_DataInitStructure.SDIO_DataLength    = 64;
    SDIO_DataInitStructure.SDIO_DataBlockSize = SDIO_DataBlockSize_64b;
    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 ACMD13 SD_APP_STAUS  with argument as card's RCA.*/
    SDIO_CmdInitStructure.SDIO_Argument = 0;
    SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_SD_APP_STAUS;
    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_SD_APP_STAUS);

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

    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++)
            {
                *(psdstatus + count) = SDIO_ReadData();
            }
            psdstatus += 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);
    }

    count = SD_DATATIMEOUT;
    while ((SDIO_GetFlagStatus(SDIO_FLAG_RXDAVL) != RESET) && (count > 0))
    {
        *psdstatus = SDIO_ReadData();
        psdstatus++;
        count--;
    }
    /*!< Clear all the static status flags*/
    SDIO_ClearFlag(SDIO_STATIC_FLAGS);

    return (errorstatus);
}

/**
 * @brief  Allows to process all the interrupts that are high.
 * @param  None
 * @retval SD_Error: SD Card Error code.
 */
SD_Error SD_ProcessIRQSrc(void)
{
    if (SDIO_GetITStatus(SDIO_IT_DATAEND) != RESET)
    {
        TransferError = SD_OK;
        SDIO_ClearITPendingBit(SDIO_IT_DATAEND);
        TransferEnd = 1;
    }
    else if (SDIO_GetITStatus(SDIO_IT_DCRCFAIL) != RESET)
    {
        SDIO_ClearITPendingBit(SDIO_IT_DCRCFAIL);
        TransferError = SD_DATA_CRC_FAIL;
    }
    else if (SDIO_GetITStatus(SDIO_IT_DTIMEOUT) != RESET)
    {
        SDIO_ClearITPendingBit(SDIO_IT_DTIMEOUT);
        TransferError = SD_DATA_TIMEOUT;
    }
    else if (SDIO_GetITStatus(SDIO_IT_RXOVERR) != RESET)
    {
        SDIO_ClearITPendingBit(SDIO_IT_RXOVERR);
        TransferError = SD_RX_OVERRUN;
    }
    else if (SDIO_GetITStatus(SDIO_IT_TXUNDERR) != RESET)
    {
        SDIO_ClearITPendingBit(SDIO_IT_TXUNDERR);
        TransferError = SD_TX_UNDERRUN;
    }
    else if (SDIO_GetITStatus(SDIO_IT_STBITERR) != RESET)
    {
        SDIO_ClearITPendingBit(SDIO_IT_STBITERR);
        TransferError = SD_START_BIT_ERR;
    }

    SDIO_ITConfig(SDIO_IT_DCRCFAIL | SDIO_IT_DTIMEOUT | SDIO_IT_DATAEND |
                      SDIO_IT_TXFIFOHE | SDIO_IT_RXFIFOHF | SDIO_IT_TXUNDERR |
                      SDIO_IT_RXOVERR | SDIO_IT_STBITERR,
                  DISABLE);
    return (TransferError);
}

/**
 * @brief  This function waits until the SDIO DMA data transfer is finished.
 * @param  None.
 * @retval None.
 */
void SD_ProcessDMAIRQ(void)
{
    if (DMA2->LISR & SD_SDIO_DMA_FLAG_TCIF)
    {
        DMAEndOfTransfer = 0x01;
        DMA_ClearFlag(SD_SDIO_DMA_STREAM, SD_SDIO_DMA_FLAG_TCIF | SD_SDIO_DMA_FLAG_FEIF);
    }
}

/**
 * @brief  Checks for error conditions for CMD0.
 * @param  None
 * @retval SD_Error: SD Card Error code.
 */
static SD_Error CmdError(void)
{
    SD_Error errorstatus = SD_OK;
    uint32_t timeout;

    timeout = SDIO_CMD0TIMEOUT; /*!< 10000 */

    while ((timeout > 0) && (SDIO_GetFlagStatus(SDIO_FLAG_CMDSENT) == RESET))
    {
        timeout--;
    }

    if (timeout == 0)
    {
        errorstatus = SD_CMD_RSP_TIMEOUT;
        return (errorstatus);
    }

    /*!< Clear all the static flags */
    SDIO_ClearFlag(SDIO_STATIC_FLAGS);

    return (errorstatus);
}

/**
 * @brief  Checks for error conditions for R7 response.
 * @param  None
 * @retval SD_Error: SD Card Error code.
 */
static SD_Error CmdResp7Error(void)
{
    SD_Error errorstatus = SD_OK;
    uint32_t status;
    uint32_t timeout = SDIO_CMD0TIMEOUT;

    status = SDIO->STA;

    while (!(status & (SDIO_FLAG_CCRCFAIL | SDIO_FLAG_CMDREND | SDIO_FLAG_CTIMEOUT)) && (timeout > 0))
    {
        timeout--;
        status = SDIO->STA;
    }

    if ((timeout == 0) || (status & SDIO_FLAG_CTIMEOUT))
    {
        /*!< Card is not V2.0 complient or card does not support the set voltage range */
        errorstatus = SD_CMD_RSP_TIMEOUT;
        SDIO_ClearFlag(SDIO_FLAG_CTIMEOUT);
        return (errorstatus);
    }

    if (status & SDIO_FLAG_CMDREND)
    {
        /*!< Card is SD V2.0 compliant */
        errorstatus = SD_OK;
        SDIO_ClearFlag(SDIO_FLAG_CMDREND);
        return (errorstatus);
    }
    return (errorstatus);
}

/**
 * @brief  Checks for error conditions for R1 response.
 * @param  cmd: The sent command index.
 * @retval SD_Error: SD Card Error code.
 */
static SD_Error CmdResp1Error(uint8_t cmd)
{
    SD_Error errorstatus = SD_OK;
    uint32_t status;
    uint32_t response_r1;

    status = SDIO->STA;

    while (!(status & (SDIO_FLAG_CCRCFAIL | SDIO_FLAG_CMDREND | SDIO_FLAG_CTIMEOUT)))
    {
        status = SDIO->STA;
    }

    if (status & SDIO_FLAG_CTIMEOUT)
    {
        errorstatus = SD_CMD_RSP_TIMEOUT;
        SDIO_ClearFlag(SDIO_FLAG_CTIMEOUT);
        return (errorstatus);
    }
    else if (status & SDIO_FLAG_CCRCFAIL)
    {
        errorstatus = SD_CMD_CRC_FAIL;
        SDIO_ClearFlag(SDIO_FLAG_CCRCFAIL);
        return (errorstatus);
    }

    /*!< Check response received is of desired command */
    if (SDIO_GetCommandResponse() != cmd)
    {
        errorstatus = SD_ILLEGAL_CMD;
        return (errorstatus);
    }

    /*!< Clear all the static flags */
    SDIO_ClearFlag(SDIO_STATIC_FLAGS);

    /*!< We have received response, retrieve it for analysis  */
    response_r1 = SDIO_GetResponse(SDIO_RESP1);

    if ((response_r1 & SD_OCR_ERRORBITS) == SD_ALLZERO)
    {
        return (errorstatus);
    }

    if (response_r1 & SD_OCR_ADDR_OUT_OF_RANGE)
    {
        return (SD_ADDR_OUT_OF_RANGE);
    }

    if (response_r1 & SD_OCR_ADDR_MISALIGNED)
    {
        return (SD_ADDR_MISALIGNED);
    }

    if (response_r1 & SD_OCR_BLOCK_LEN_ERR)
    {
        return (SD_BLOCK_LEN_ERR);
    }

    if (response_r1 & SD_OCR_ERASE_SEQ_ERR)
    {
        return (SD_ERASE_SEQ_ERR);
    }

    if (response_r1 & SD_OCR_BAD_ERASE_PARAM)
    {
        return (SD_BAD_ERASE_PARAM);
    }

    if (response_r1 & SD_OCR_WRITE_PROT_VIOLATION)
    {
        return (SD_WRITE_PROT_VIOLATION);
    }

    if (response_r1 & SD_OCR_LOCK_UNLOCK_FAILED)
    {
        return (SD_LOCK_UNLOCK_FAILED);
    }

    if (response_r1 & SD_OCR_COM_CRC_FAILED)
    {
        return (SD_COM_CRC_FAILED);
    }

    if (response_r1 & SD_OCR_ILLEGAL_CMD)
    {
        return (SD_ILLEGAL_CMD);
    }

    if (response_r1 & SD_OCR_CARD_ECC_FAILED)
    {
        return (SD_CARD_ECC_FAILED);
    }

    if (response_r1 & SD_OCR_CC_ERROR)
    {
        return (SD_CC_ERROR);
    }

    if (response_r1 & SD_OCR_GENERAL_UNKNOWN_ERROR)
    {
        return (SD_GENERAL_UNKNOWN_ERROR);
    }

    if (response_r1 & SD_OCR_STREAM_READ_UNDERRUN)
    {
        return (SD_STREAM_READ_UNDERRUN);
    }

    if (response_r1 & SD_OCR_STREAM_WRITE_OVERRUN)
    {
        return (SD_STREAM_WRITE_OVERRUN);
    }

    if (response_r1 & SD_OCR_CID_CSD_OVERWRIETE)
    {
        return (SD_CID_CSD_OVERWRITE);
    }

    if (response_r1 & SD_OCR_WP_ERASE_SKIP)
    {
        return (SD_WP_ERASE_SKIP);
    }

    if (response_r1 & SD_OCR_CARD_ECC_DISABLED)
    {
        return (SD_CARD_ECC_DISABLED);
    }

    if (response_r1 & SD_OCR_ERASE_RESET)
    {
        return (SD_ERASE_RESET);
    }

    if (response_r1 & SD_OCR_AKE_SEQ_ERROR)
    {
        return (SD_AKE_SEQ_ERROR);
    }
    return (errorstatus);
}

/**
 * @brief  Checks for error conditions for R3 (OCR) response.
 * @param  None
 * @retval SD_Error: SD Card Error code.
 */
static SD_Error CmdResp3Error(void)
{
    SD_Error errorstatus = SD_OK;
    uint32_t status;

    status = SDIO->STA;

    while (!(status & (SDIO_FLAG_CCRCFAIL | SDIO_FLAG_CMDREND | SDIO_FLAG_CTIMEOUT)))
    {
        status = SDIO->STA;
    }

    if (status & SDIO_FLAG_CTIMEOUT)
    {
        errorstatus = SD_CMD_RSP_TIMEOUT;
        SDIO_ClearFlag(SDIO_FLAG_CTIMEOUT);
        return (errorstatus);
    }
    /*!< Clear all the static flags */
    SDIO_ClearFlag(SDIO_STATIC_FLAGS);
    return (errorstatus);
}

/**
 * @brief  Checks for error conditions for R2 (CID or CSD) response.
 * @param  None
 * @retval SD_Error: SD Card Error code.
 */
static SD_Error CmdResp2Error(void)
{
    SD_Error errorstatus = SD_OK;
    uint32_t status;

    status = SDIO->STA;

    while (!(status & (SDIO_FLAG_CCRCFAIL | SDIO_FLAG_CTIMEOUT | SDIO_FLAG_CMDREND)))
    {
        status = SDIO->STA;
    }

    if (status & SDIO_FLAG_CTIMEOUT)
    {
        errorstatus = SD_CMD_RSP_TIMEOUT;
        SDIO_ClearFlag(SDIO_FLAG_CTIMEOUT);
        return (errorstatus);
    }
    else if (status & SDIO_FLAG_CCRCFAIL)
    {
        errorstatus = SD_CMD_CRC_FAIL;
        SDIO_ClearFlag(SDIO_FLAG_CCRCFAIL);
        return (errorstatus);
    }

    /*!< Clear all the static flags */
    SDIO_ClearFlag(SDIO_STATIC_FLAGS);

    return (errorstatus);
}

/**
 * @brief  Checks for error conditions for R6 (RCA) response.
 * @param  cmd: The sent command index.
 * @param  prca: pointer to the variable that will contain the SD card relative
 *         address RCA.
 * @retval SD_Error: SD Card Error code.
 */
static SD_Error CmdResp6Error(uint8_t cmd, uint16_t *prca)
{
    SD_Error errorstatus = SD_OK;
    uint32_t status;
    uint32_t response_r1;

    status = SDIO->STA;

    while (!(status & (SDIO_FLAG_CCRCFAIL | SDIO_FLAG_CTIMEOUT | SDIO_FLAG_CMDREND)))
    {
        status = SDIO->STA;
    }

    if (status & SDIO_FLAG_CTIMEOUT)
    {
        errorstatus = SD_CMD_RSP_TIMEOUT;
        SDIO_ClearFlag(SDIO_FLAG_CTIMEOUT);
        return (errorstatus);
    }
    else if (status & SDIO_FLAG_CCRCFAIL)
    {
        errorstatus = SD_CMD_CRC_FAIL;
        SDIO_ClearFlag(SDIO_FLAG_CCRCFAIL);
        return (errorstatus);
    }

    /*!< Check response received is of desired command */
    if (SDIO_GetCommandResponse() != cmd)
    {
        errorstatus = SD_ILLEGAL_CMD;
        return (errorstatus);
    }

    /*!< Clear all the static flags */
    SDIO_ClearFlag(SDIO_STATIC_FLAGS);

    /*!< We have received response, retrieve it.  */
    response_r1 = SDIO_GetResponse(SDIO_RESP1);

    if (SD_ALLZERO == (response_r1 & (SD_R6_GENERAL_UNKNOWN_ERROR | SD_R6_ILLEGAL_CMD | SD_R6_COM_CRC_FAILED)))
    {
        *prca = (uint16_t)(response_r1 >> 16);
        return (errorstatus);
    }

    if (response_r1 & SD_R6_GENERAL_UNKNOWN_ERROR)
    {
        return (SD_GENERAL_UNKNOWN_ERROR);
    }

    if (response_r1 & SD_R6_ILLEGAL_CMD)
    {
        return (SD_ILLEGAL_CMD);
    }

    if (response_r1 & SD_R6_COM_CRC_FAILED)
    {
        return (SD_COM_CRC_FAILED);
    }

    return (errorstatus);
}

/**
 * @brief  Enables or disables the SDIO wide bus mode.
 * @param  NewState: new state of the SDIO wide bus mode.
 *   This parameter can be: ENABLE or DISABLE.
 * @retval SD_Error: SD Card Error code.
 */
static SD_Error SDEnWideBus(FunctionalState NewState)
{
    SD_Error errorstatus = SD_OK;

    uint32_t scr[2] = {0, 0};

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

    /*!< Get SCR Register */
    errorstatus = FindSCR(RCA, scr);

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

    /*!< If wide bus operation to be enabled */
    if (NewState == ENABLE)
    {
        /*!< If requested card supports wide bus operation */
        if ((scr[1] & SD_WIDE_BUS_SUPPORT) != SD_ALLZERO)
        {
            /*!< Send CMD55 APP_CMD with argument as card's RCA.*/
            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);
            }

            /*!< Send ACMD6 APP_CMD with argument as 2 for wide bus mode */
            SDIO_CmdInitStructure.SDIO_Argument = 0x2;
            SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_APP_SD_SET_BUSWIDTH;
            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_SD_SET_BUSWIDTH);

            if (errorstatus != SD_OK)
            {
                return (errorstatus);
            }
            return (errorstatus);
        }
        else
        {
            errorstatus = SD_REQUEST_NOT_APPLICABLE;
            return (errorstatus);
        }
    } /*!< If wide bus operation to be disabled */
    else
    {
        /*!< If requested card supports 1 bit mode operation */
        if ((scr[1] & SD_SINGLE_BUS_SUPPORT) != SD_ALLZERO)
        {
            /*!< Send CMD55 APP_CMD with argument as card's RCA.*/
            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);
            }

            /*!< Send ACMD6 APP_CMD with argument as 2 for wide bus mode */
            SDIO_CmdInitStructure.SDIO_Argument = 0x00;
            SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_APP_SD_SET_BUSWIDTH;
            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_SD_SET_BUSWIDTH);

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

            return (errorstatus);
        }
        else
        {
            errorstatus = SD_REQUEST_NOT_APPLICABLE;
            return (errorstatus);
        }
    }
}

/**
 * @brief  Checks if the SD card is in programming state.
 * @param  pstatus: pointer to the variable that will contain the SD card state.
 * @retval SD_Error: SD Card Error code.
 */
static SD_Error IsCardProgramming(uint8_t *pstatus)
{
    SD_Error      errorstatus = SD_OK;
    __IO uint32_t respR1 = 0, status = 0;

    SDIO_CmdInitStructure.SDIO_Argument = (uint32_t)RCA << 16;
    SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_SEND_STATUS;
    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);

    status = SDIO->STA;
    while (!(status & (SDIO_FLAG_CCRCFAIL | SDIO_FLAG_CMDREND | SDIO_FLAG_CTIMEOUT)))
    {
        status = SDIO->STA;
    }

    if (status & SDIO_FLAG_CTIMEOUT)
    {
        errorstatus = SD_CMD_RSP_TIMEOUT;
        SDIO_ClearFlag(SDIO_FLAG_CTIMEOUT);
        return (errorstatus);
    }
    else if (status & SDIO_FLAG_CCRCFAIL)
    {
        errorstatus = SD_CMD_CRC_FAIL;
        SDIO_ClearFlag(SDIO_FLAG_CCRCFAIL);
        return (errorstatus);
    }

    status = (uint32_t)SDIO_GetCommandResponse();

    /*!< Check response received is of desired command */
    if (status != SD_CMD_SEND_STATUS)
    {
        errorstatus = SD_ILLEGAL_CMD;
        return (errorstatus);
    }

    /*!< Clear all the static flags */
    SDIO_ClearFlag(SDIO_STATIC_FLAGS);

    /*!< We have received response, retrieve it for analysis  */
    respR1 = SDIO_GetResponse(SDIO_RESP1);

    /*!< Find out card status */
    *pstatus = (uint8_t)((respR1 >> 9) & 0x0000000F);

    if ((respR1 & SD_OCR_ERRORBITS) == SD_ALLZERO)
    {
        return (errorstatus);
    }

    if (respR1 & SD_OCR_ADDR_OUT_OF_RANGE)
    {
        return (SD_ADDR_OUT_OF_RANGE);
    }

    if (respR1 & SD_OCR_ADDR_MISALIGNED)
    {
        return (SD_ADDR_MISALIGNED);
    }

    if (respR1 & SD_OCR_BLOCK_LEN_ERR)
    {
        return (SD_BLOCK_LEN_ERR);
    }

    if (respR1 & SD_OCR_ERASE_SEQ_ERR)
    {
        return (SD_ERASE_SEQ_ERR);
    }

    if (respR1 & SD_OCR_BAD_ERASE_PARAM)
    {
        return (SD_BAD_ERASE_PARAM);
    }

    if (respR1 & SD_OCR_WRITE_PROT_VIOLATION)
    {
        return (SD_WRITE_PROT_VIOLATION);
    }

    if (respR1 & SD_OCR_LOCK_UNLOCK_FAILED)
    {
        return (SD_LOCK_UNLOCK_FAILED);
    }

    if (respR1 & SD_OCR_COM_CRC_FAILED)
    {
        return (SD_COM_CRC_FAILED);
    }

    if (respR1 & SD_OCR_ILLEGAL_CMD)
    {
        return (SD_ILLEGAL_CMD);
    }

    if (respR1 & SD_OCR_CARD_ECC_FAILED)
    {
        return (SD_CARD_ECC_FAILED);
    }

    if (respR1 & SD_OCR_CC_ERROR)
    {
        return (SD_CC_ERROR);
    }

    if (respR1 & SD_OCR_GENERAL_UNKNOWN_ERROR)
    {
        return (SD_GENERAL_UNKNOWN_ERROR);
    }

    if (respR1 & SD_OCR_STREAM_READ_UNDERRUN)
    {
        return (SD_STREAM_READ_UNDERRUN);
    }

    if (respR1 & SD_OCR_STREAM_WRITE_OVERRUN)
    {
        return (SD_STREAM_WRITE_OVERRUN);
    }

    if (respR1 & SD_OCR_CID_CSD_OVERWRIETE)
    {
        return (SD_CID_CSD_OVERWRITE);
    }

    if (respR1 & SD_OCR_WP_ERASE_SKIP)
    {
        return (SD_WP_ERASE_SKIP);
    }

    if (respR1 & SD_OCR_CARD_ECC_DISABLED)
    {
        return (SD_CARD_ECC_DISABLED);
    }

    if (respR1 & SD_OCR_ERASE_RESET)
    {
        return (SD_ERASE_RESET);
    }

    if (respR1 & SD_OCR_AKE_SEQ_ERROR)
    {
        return (SD_AKE_SEQ_ERROR);
    }

    return (errorstatus);
}

/**
 * @brief  Find the SD card SCR register value.
 * @param  rca: selected card address.
 * @param  pscr: pointer to the buffer that will contain the SCR value.
 * @retval SD_Error: SD Card Error code.
 */
static SD_Error FindSCR(uint16_t rca, uint32_t *pscr)
{
    uint32_t index       = 0;
    SD_Error errorstatus = SD_OK;
    uint32_t tempscr[2]  = {0, 0};

    /*!< Set Block Size To 8 Bytes */
    /*!< Send CMD55 APP_CMD with argument as card's RCA */
    SDIO_CmdInitStructure.SDIO_Argument = (uint32_t)8;
    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 (errorstatus != SD_OK)
    {
        return (errorstatus);
    }

    /*!< Send CMD55 APP_CMD with argument as card's RCA */
    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);
    }
    SDIO_DataInitStructure.SDIO_DataTimeOut   = SD_DATATIMEOUT;
    SDIO_DataInitStructure.SDIO_DataLength    = 8;
    SDIO_DataInitStructure.SDIO_DataBlockSize = SDIO_DataBlockSize_8b;
    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 ACMD51 SD_APP_SEND_SCR with argument as 0 */
    SDIO_CmdInitStructure.SDIO_Argument = 0x0;
    SDIO_CmdInitStructure.SDIO_CmdIndex = SD_CMD_SD_APP_SEND_SCR;
    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_SD_APP_SEND_SCR);

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

    while (!(SDIO->STA & (SDIO_FLAG_RXOVERR | SDIO_FLAG_DCRCFAIL | SDIO_FLAG_DTIMEOUT | SDIO_FLAG_DBCKEND | SDIO_FLAG_STBITERR)))
    {
        if (SDIO_GetFlagStatus(SDIO_FLAG_RXDAVL) != RESET)
        {
            *(tempscr + index) = SDIO_ReadData();
            index++;
        }
    }

    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);
    }

    /*!< Clear all the static flags */
    SDIO_ClearFlag(SDIO_STATIC_FLAGS);

    *(pscr + 1) = ((tempscr[0] & SD_0TO7BITS) << 24) | ((tempscr[0] & SD_8TO15BITS) << 8) | ((tempscr[0] & SD_16TO23BITS) >> 8) | ((tempscr[0] & SD_24TO31BITS) >> 24);

    *(pscr) = ((tempscr[1] & SD_0TO7BITS) << 24) | ((tempscr[1] & SD_8TO15BITS) << 8) | ((tempscr[1] & SD_16TO23BITS) >> 8) | ((tempscr[1] & SD_24TO31BITS) >> 24);

    return (errorstatus);
}

/**
 * @brief  Converts the number of bytes in power of two and returns the power.
 * @param  NumberOfBytes: number of bytes.
 * @retval None
 */
uint8_t convert_from_bytes_to_power_of_two(uint16_t NumberOfBytes)
{
    uint8_t count = 0;

    while (NumberOfBytes != 1)
    {
        NumberOfBytes >>= 1;
        count++;
    }
    return (count);
}

/*************************************************************************************/

/**
 * @brief  DeInitializes the SDIO interface.
 * @param  None
 * @retval None
 */
void SD_LowLevel_DeInit(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;

    /*!< Disable SDIO Clock */
    SDIO_ClockCmd(DISABLE);

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

    /*!< DeInitializes the SDIO peripheral */
    SDIO_DeInit();

    /* Disable the SDIO APB2 Clock */
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_SDIO, DISABLE);

    GPIO_PinAFConfig(GPIOC, GPIO_PinSource8, GPIO_AF_MCO);
    GPIO_PinAFConfig(GPIOC, GPIO_PinSource9, GPIO_AF_MCO);
    GPIO_PinAFConfig(GPIOC, GPIO_PinSource10, GPIO_AF_MCO);
    GPIO_PinAFConfig(GPIOC, GPIO_PinSource11, GPIO_AF_MCO);
    GPIO_PinAFConfig(GPIOC, GPIO_PinSource12, GPIO_AF_MCO);
    GPIO_PinAFConfig(GPIOD, GPIO_PinSource2, GPIO_AF_MCO);

    /* Configure PC.08, PC.09, PC.10, PC.11 pins: D0, D1, D2, D3 pins */
    GPIO_InitStructure.GPIO_Pin  = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
    GPIO_Init(GPIOC, &GPIO_InitStructure);

    /* Configure PD.02 CMD line */
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
    GPIO_Init(GPIOD, &GPIO_InitStructure);

    /* Configure PC.12 pin: CLK pin */
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
    GPIO_Init(GPIOC, &GPIO_InitStructure);
}

/**
 * @brief  Initializes the SD Card and put it into StandBy State (Ready for
 *         data transfer).
 * @param  None
 * @retval None
 */
void SD_LowLevel_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;

    /* GPIOC and GPIOD Periph clock enable */
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC | RCC_AHB1Periph_GPIOD | SD_DETECT_GPIO_CLK, ENABLE);

    GPIO_PinAFConfig(GPIOC, GPIO_PinSource8, GPIO_AF_SDIO);
    GPIO_PinAFConfig(GPIOC, GPIO_PinSource9, GPIO_AF_SDIO);
    GPIO_PinAFConfig(GPIOC, GPIO_PinSource10, GPIO_AF_SDIO);
    GPIO_PinAFConfig(GPIOC, GPIO_PinSource11, GPIO_AF_SDIO);
    GPIO_PinAFConfig(GPIOC, GPIO_PinSource12, GPIO_AF_SDIO);
    GPIO_PinAFConfig(GPIOD, GPIO_PinSource2, GPIO_AF_SDIO);

    /* Configure PC.08, PC.09, PC.10, PC.11 pins: D0, D1, D2, D3 pins */
    GPIO_InitStructure.GPIO_Pin   = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_25MHz;
    GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_AF;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_UP;
    GPIO_Init(GPIOC, &GPIO_InitStructure);

    /* Configure PD.02 CMD line */
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
    GPIO_Init(GPIOD, &GPIO_InitStructure);

    /* Configure PC.12 pin: CLK pin */
    GPIO_InitStructure.GPIO_Pin  = GPIO_Pin_12;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
    GPIO_Init(GPIOC, &GPIO_InitStructure);

    /*!< Configure SD_SPI_DETECT_PIN pin: SD Card detect pin */
    GPIO_InitStructure.GPIO_Pin  = SD_DETECT_PIN;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
    GPIO_Init(SD_DETECT_GPIO_PORT, &GPIO_InitStructure);

    /* Enable the SDIO APB2 Clock */
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_SDIO, ENABLE);

    /* Enable the DMA2 Clock */
    RCC_AHB1PeriphClockCmd(SD_SDIO_DMA_CLK, ENABLE);
}

/**
 * @brief  Configures the DMA2 Channel4 for SDIO Tx request.
 * @param  BufferSRC: pointer to the source buffer
 * @param  BufferSize: buffer size
 * @retval None
 */
void SD_LowLevel_DMA_TxConfig(uint32_t *BufferSRC, uint32_t BufferSize)
{
    DMA_InitTypeDef SDDMA_InitStructure;

    DMA_ClearFlag(SD_SDIO_DMA_STREAM, SD_SDIO_DMA_FLAG_FEIF | SD_SDIO_DMA_FLAG_DMEIF | SD_SDIO_DMA_FLAG_TEIF | SD_SDIO_DMA_FLAG_HTIF | SD_SDIO_DMA_FLAG_TCIF);

    /* DMA2 Stream3  or Stream6 disable */
    DMA_Cmd(SD_SDIO_DMA_STREAM, DISABLE);

    /* DMA2 Stream3  or Stream6 Config */
    DMA_DeInit(SD_SDIO_DMA_STREAM);

    SDDMA_InitStructure.DMA_Channel            = SD_SDIO_DMA_CHANNEL;
    SDDMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)SDIO_FIFO_ADDRESS;
    SDDMA_InitStructure.DMA_Memory0BaseAddr    = (uint32_t)BufferSRC;
    SDDMA_InitStructure.DMA_DIR                = DMA_DIR_MemoryToPeripheral;
    SDDMA_InitStructure.DMA_BufferSize         = 0;
    SDDMA_InitStructure.DMA_PeripheralInc      = DMA_PeripheralInc_Disable;
    SDDMA_InitStructure.DMA_MemoryInc          = DMA_MemoryInc_Enable;
    SDDMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;
    SDDMA_InitStructure.DMA_MemoryDataSize     = DMA_MemoryDataSize_Word;
    SDDMA_InitStructure.DMA_Mode               = DMA_Mode_Normal;
    SDDMA_InitStructure.DMA_Priority           = DMA_Priority_VeryHigh;
    SDDMA_InitStructure.DMA_FIFOMode           = DMA_FIFOMode_Enable;
    SDDMA_InitStructure.DMA_FIFOThreshold      = DMA_FIFOThreshold_Full;
    SDDMA_InitStructure.DMA_MemoryBurst        = DMA_MemoryBurst_INC4;
    SDDMA_InitStructure.DMA_PeripheralBurst    = DMA_PeripheralBurst_INC4;
    DMA_Init(SD_SDIO_DMA_STREAM, &SDDMA_InitStructure);
    DMA_ITConfig(SD_SDIO_DMA_STREAM, DMA_IT_TC, ENABLE);
    DMA_FlowControllerConfig(SD_SDIO_DMA_STREAM, DMA_FlowCtrl_Peripheral);

    /* DMA2 Stream3  or Stream6 enable */
    DMA_Cmd(SD_SDIO_DMA_STREAM, ENABLE);
}

/**
 * @brief  Configures the DMA2 Channel4 for SDIO Rx request.
 * @param  BufferDST: pointer to the destination buffer
 * @param  BufferSize: buffer size
 * @retval None
 */
void SD_LowLevel_DMA_RxConfig(uint32_t *BufferDST, uint32_t BufferSize)
{
    DMA_InitTypeDef SDDMA_InitStructure;

    DMA_ClearFlag(SD_SDIO_DMA_STREAM, SD_SDIO_DMA_FLAG_FEIF | SD_SDIO_DMA_FLAG_DMEIF | SD_SDIO_DMA_FLAG_TEIF | SD_SDIO_DMA_FLAG_HTIF | SD_SDIO_DMA_FLAG_TCIF);

    /* DMA2 Stream3  or Stream6 disable */
    DMA_Cmd(SD_SDIO_DMA_STREAM, DISABLE);

    /* DMA2 Stream3 or Stream6 Config */
    DMA_DeInit(SD_SDIO_DMA_STREAM);

    SDDMA_InitStructure.DMA_Channel            = SD_SDIO_DMA_CHANNEL;
    SDDMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)SDIO_FIFO_ADDRESS;
    SDDMA_InitStructure.DMA_Memory0BaseAddr    = (uint32_t)BufferDST;
    SDDMA_InitStructure.DMA_DIR                = DMA_DIR_PeripheralToMemory;
    SDDMA_InitStructure.DMA_BufferSize         = 0;
    SDDMA_InitStructure.DMA_PeripheralInc      = DMA_PeripheralInc_Disable;
    SDDMA_InitStructure.DMA_MemoryInc          = DMA_MemoryInc_Enable;
    SDDMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;
    SDDMA_InitStructure.DMA_MemoryDataSize     = DMA_MemoryDataSize_Word;
    SDDMA_InitStructure.DMA_Mode               = DMA_Mode_Normal;
    SDDMA_InitStructure.DMA_Priority           = DMA_Priority_VeryHigh;
    SDDMA_InitStructure.DMA_FIFOMode           = DMA_FIFOMode_Enable;
    SDDMA_InitStructure.DMA_FIFOThreshold      = DMA_FIFOThreshold_Full;
    SDDMA_InitStructure.DMA_MemoryBurst        = DMA_MemoryBurst_INC4;
    SDDMA_InitStructure.DMA_PeripheralBurst    = DMA_PeripheralBurst_INC4;
    DMA_Init(SD_SDIO_DMA_STREAM, &SDDMA_InitStructure);
    DMA_ITConfig(SD_SDIO_DMA_STREAM, DMA_IT_TC, ENABLE);
    DMA_FlowControllerConfig(SD_SDIO_DMA_STREAM, DMA_FlowCtrl_Peripheral);

    /* DMA2 Stream3 or Stream6 enable */
    DMA_Cmd(SD_SDIO_DMA_STREAM, ENABLE);
}

/*
*********************************************************************************************************
*	函 数 名: SDIO_Interrupts_Config
*	功能说明: 配置SDIO中断
*	形    参:  无
*	返 回 值: 无
*********************************************************************************************************
*/
void SDIO_Interrupts_Config(void)
{
    NVIC_InitTypeDef NVIC_InitStructure;

    /* Configure the NVIC Preemption Priority Bits */
//    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);

    NVIC_InitStructure.NVIC_IRQChannel                   = SDIO_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority        = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd                = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

#if 1
    NVIC_InitStructure.NVIC_IRQChannel                   = SD_SDIO_DMA_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
    NVIC_Init(&NVIC_InitStructure);
#endif
}

/*
*********************************************************************************************************
*	函 数 名: SDIO_IRQHandler
*	功能说明: SDIO中断
*	形    参:  无
*	返 回 值: 无
*********************************************************************************************************
*/
void SDIO_IRQHandler(void)
{
    /* 处理所有的SDIO中断源 */
    SD_ProcessIRQSrc();
}

/**
 * @brief  This function handles DMA2 Stream3 or DMA2 Stream6 global interrupts
 *         requests.
 * @param  None
 * @retval None
 */
void DMA2_Stream3_IRQHandler(void)
{
    /* Process DMA2 Stream3 or DMA2 Stream6 Interrupt Sources */
    SD_ProcessDMAIRQ();
}

/**
 * @}
 */

/**
 * @}
 */

/**
 * @}
 */

/**
 * @}
 */

/**
 * @}
 */

/******************* (C) COPYRIGHT 2010 STMicroelectronics *****END OF FILE****/