一．硬件连接
上图为stm32的CPU引脚图
上图为SD卡的接线
二．源码
Sdio_sdcard.h
//SDIO相关标志位,拷贝自:stm32f4xx_sdio.h
#defineSDIO_FLAG_CCRCFAIL ((uint32_t)0x00000001)
#defineSDIO_FLAG_DCRCFAIL ((uint32_t)0x00000002)
#defineSDIO_FLAG_CTIMEOUT ((uint32_t)0x00000004)
#defineSDIO_FLAG_DTIMEOUT ((uint32_t)0x00000008)
#defineSDIO_FLAG_TXUNDERR ((uint32_t)0x00000010)
#defineSDIO_FLAG_RXOVERR ((uint32_t)0x00000020)
#defineSDIO_FLAG_CMDREND ((uint32_t)0x00000040)
#defineSDIO_FLAG_CMDSENT ((uint32_t)0x00000080)
#defineSDIO_FLAG_DATAEND ((uint32_t)0x00000100)
#defineSDIO_FLAG_STBITERR ((uint32_t)0x00000200)
#defineSDIO_FLAG_DBCKEND ((uint32_t)0x00000400)
#defineSDIO_FLAG_CMDACT ((uint32_t)0x00000800)
#defineSDIO_FLAG_TXACT ((uint32_t)0x00001000)
#defineSDIO_FLAG_RXACT ((uint32_t)0x00002000)
#defineSDIO_FLAG_TXFIFOHE ((uint32_t)0x00004000)
#defineSDIO_FLAG_RXFIFOHF ((uint32_t)0x00008000)
#defineSDIO_FLAG_TXFIFOF ((uint32_t)0x00010000)
#defineSDIO_FLAG_RXFIFOF ((uint32_t)0x00020000)
#defineSDIO_FLAG_TXFIFOE ((uint32_t)0x00040000)
#defineSDIO_FLAG_RXFIFOE ((uint32_t)0x00080000)
#defineSDIO_FLAG_TXDAVL ((uint32_t)0x00100000)
#defineSDIO_FLAG_RXDAVL ((uint32_t)0x00200000)
#defineSDIO_FLAG_SDIOIT ((uint32_t)0x00400000)
#defineSDIO_FLAG_CEATAEND ((uint32_t)0x00800000)
//用户配置区
//SDIO时钟计算公式:SDIO_CK时钟=SDIOCLK/[clkdiv+2];其中,SDIOCLK固定为48Mhz
//使用DMA模式的时候,传输速率可以到48Mhz(bypasson时),不过如果你的卡不是高速
//卡,可能也会出错,出错就请降低时钟
#defineSDIO_INIT_CLK_DIV 0x76 //SDIO初始化频率，最大400Kh
#defineSDIO_TRANSFER_CLK_DIV 0x00 //SDIO传输频率,该值太小可能会导致读写文件出错
////////////////////////////////////////////////////////////////////////////////////////////////////
//SDIO工作模式定义,通过SD_SetDeviceMode函数设置.
#defineSD_POLLING_MODE 0 //查询模式,该模式下,如果读写有问题,建议增大SDIO_TRANSFER_CLK_DIV的设置.
#defineSD_DMA_MODE 1 //DMA模式,该模式下,如果读写有问题,建议增大SDIO_TRANSFER_CLK_DIV的设置.
//SDIO 各种错误枚举定义
typedefenum
{
//特殊错误定义
SD_CMD_CRC_FAIL = (1), /*!< Commandresponse received (but CRC check failed) */
SD_DATA_CRC_FAIL = (2), /*!< Data bock sent/received(CRC check Failed) */
SD_CMD_RSP_TIMEOUT = (3), /*!< Commandresponse timeout */
SD_DATA_TIMEOUT = (4), /*!< Data timeout */
SD_TX_UNDERRUN = (5), /*!< TransmitFIFO under-run */
SD_RX_OVERRUN = (6), /*!< ReceiveFIFO over-run */
SD_START_BIT_ERR = (7), /*!< Start bit notdetected on all data signals in widE bus mode */
SD_CMD_OUT_OF_RANGE = (8), /*!< CMD's argumentwas out of range.*/
SD_ADDR_MISALIGNED = (9), /*!< Misalignedaddress */
SD_BLOCK_LEN_ERR = (10), /*!< Transferredblock length is not allowed for the card or the number of transferred bytesdoes not match the block length */
SD_ERASE_SEQ_ERR = (11), /*!< An error inthe sequence of erase command occurs.*/
SD_BAD_ERASE_PARAM = (12), /*!< An Invalidselection for erase groups */
SD_WRITE_PROT_VIOLATION = (13), /*!< Attempt to programa write protect block */
SD_LOCK_UNLOCK_FAILED = (14), /*!< Sequence orpassword error has been detected in unlock command or if there was an attemptto access a locked card */
SD_COM_CRC_FAILED = (15), /*!< CRC check ofthe previous command failed */
SD_ILLEGAL_CMD = (16), /*!< Command isnot legal for the card state */
SD_CARD_ECC_FAILED = (17), /*!< Card internalECC was applied but failed to correct the data */
SD_CC_ERROR = (18), /*!< Internal cardcontroller error */
SD_GENERAL_UNKNOWN_ERROR = (19), /*!< General or Unknownerror */
SD_STREAM_READ_UNDERRUN = (20), /*!< The card could notsustain data transfer in stream read operation. */
SD_STREAM_WRITE_OVERRUN = (21), /*!< The card could notsustain data programming in stream mode */
SD_CID_CSD_OVERWRITE = (22), /*!< CID/CSDoverwrite error */
SD_WP_ERASE_SKIP = (23), /*!< only partialaddress space was erased */
SD_CARD_ECC_DISABLED = (24), /*!< Command has beenexecuted without using internal ECC */
SD_ERASE_RESET = (25), /*!< Erasesequence was cleared before executing because an out of erase sequence command wasreceived */
SD_AKE_SEQ_ERROR = (26), /*!< Error insequence of authentication. */
SD_INVALID_VOLTRANGE = (27),
SD_ADDR_OUT_OF_RANGE = (28),
SD_SWITCH_ERROR = (29),
SD_SDIO_DISABLED = (30),
SD_SDIO_FUNCTION_BUSY = (31),
SD_SDIO_FUNCTION_FAILED = (32),
SD_SDIO_UNKNOWN_FUNCTION = (33),
//标准错误定义
SD_INTERNAL_ERROR,
SD_NOT_CONFIGURED,
SD_REQUEST_PENDING,
SD_REQUEST_NOT_APPLICABLE,
SD_INVALID_PARAMETER,
SD_UNSUPPORTED_FEATURE,
SD_UNSUPPORTED_HW,
SD_ERROR,
SD_OK = 0
}SD_Error;
//SD卡CSD寄存器数据
typedefstruct
{
u8 CSDStruct; /*!< CSDstructure */
u8 SysSpecVersion; /*!<System specification version */
u8 Reserved1; /*!<Reserved */
u8 TAAC; /*!< Dataread access-time 1 */
u8 NSAC; /*!< Dataread access-time 2 in CLK cycles */
u8 MaxBusClkFrec; /*!< Max.bus clock frequency */
u16 CardComdClasses; /*!< Card command classes */
u8 RdBlockLen; /*!< Max.read data block length */
u8 PartBlockRead; /*!<Partial blocks for read allowed */
u8 WrBlockMisalign; /*!<Write block misalignment */
u8 RdBlockMisalign; /*!< Readblock misalignment */
u8 DSRImpl; /*!< DSRimplemented */
u8 Reserved2; /*!<Reserved */
u32 DeviceSize; /*!< Device Size */
u8 MaxRdCurrentVDDMin; /*!< Max.read current @ VDD min */
u8 MaxRdCurrentVDDMax; /*!< Max.read current @ VDD max */
u8 MaxWrCurrentVDDMin; /*!< Max.write current @ VDD min */
u8 MaxWrCurrentVDDMax; /*!< Max.write current @ VDD max */
u8 DeviceSizeMul; /*!<Device size multiplier */
u8 EraseGrSize; /*!<Erase group size */
u8 EraseGrMul; /*!<Erase group size multiplier */
u8 WrProtectGrSize; /*!<Write protect group size */
u8 WrProtectGrEnable; /*!<Write protect group enable */
u8 ManDeflECC; /*!< Manufacturerdefault ECC */
u8 WrSpeedFact; /*!<Write speed factor */
u8 MaxWrBlockLen; /*!< Max.write data block length */
u8 WriteBlockPaPartial; /*!<Partial blocks for write allowed */
u8 Reserved3; /*!<Reserded */
u8 ContentProtectAppli; /*!<Content protection application */
u8 FileFormatGrouop; /*!< Fileformat group */
u8 CopyFlag; /*!< Copyflag (OTP) */
u8 PermWrProtect; /*!<Permanent write protection */
u8 TempWrProtect; /*!< Temporary write protection */
u8 FileFormat; /*!< FileFormat */
u8 ECC; /*!< ECCcode */
u8 CSD_CRC; /*!< CSDCRC */
u8 Reserved4; /*!<always 1*/
}SD_CSD;
//SD卡CID寄存器数据
typedefstruct
{
u8 ManufacturerID; /*!<ManufacturerID */
u16 OEM_AppliID; /*!< OEM/Application ID */
u32 ProdName1; /*!< Product Name part1 */
u8 ProdName2; /*!<Product Name part2*/
u8 ProdRev; /*!<Product Revision */
u32 ProdSN; /*!< Product Serial Number */
u8 Reserved1; /*!<Reserved1 */
u16 ManufactDate; /*!< Manufacturing Date */
u8 CID_CRC; /*!< CIDCRC */
u8 Reserved2; /*!<always 1 */
} SD_CID;
//SD卡状态
typedefenum
{
SD_CARD_READY = ((uint32_t)0x00000001),
SD_CARD_IDENTIFICATION = ((uint32_t)0x00000002),
SD_CARD_STANDBY = ((uint32_t)0x00000003),
SD_CARD_TRANSFER = ((uint32_t)0x00000004),
SD_CARD_SENDING = ((uint32_t)0x00000005),
SD_CARD_RECEIVING = ((uint32_t)0x00000006),
SD_CARD_PROGRAMMING = ((uint32_t)0x00000007),
SD_CARD_DISCONNECTED = ((uint32_t)0x00000008),
SD_CARD_ERROR = ((uint32_t)0x000000FF)
}SDCardState;
//SD卡信息,包括CSD,CID等数据
typedefstruct
{
SD_CSD SD_csd;
SD_CID SD_cid;
long long CardCapacity; //SD卡容量,单位:字节,最大支持2^64字节大小的卡.
u32 CardBlockSize; //SD卡块大小
u16 RCA; //卡相对地址
u8 CardType; //卡类型
}SD_CardInfo;
externSD_CardInfo SDCardInfo;//SD卡信息
////////////////////////////////////////////////////////////////////////////////////////////////////
//SDIO 指令集
#defineSD_CMD_GO_IDLE_STATE ((u8)0)
#defineSD_CMD_SEND_OP_COND ((u8)1)
#defineSD_CMD_ALL_SEND_CID ((u8)2)
#defineSD_CMD_SET_REL_ADDR ((u8)3) /*!< SDIO_SEND_REL_ADDR for SD Card */
#defineSD_CMD_SET_DSR ((u8)4)
#defineSD_CMD_SDIO_SEN_OP_COND ((u8)5)
#defineSD_CMD_HS_SWITCH ((u8)6)
#defineSD_CMD_SEL_DESEL_CARD ((u8)7)
#defineSD_CMD_HS_SEND_EXT_CSD ((u8)8)
#define SD_CMD_SEND_CSD ((u8)9)
#defineSD_CMD_SEND_CID ((u8)10)
#defineSD_CMD_READ_DAT_UNTIL_STOP ((u8)11) /*!< SD Card doesn't support it */
#defineSD_CMD_STOP_TRANSMISSION ((u8)12)
#defineSD_CMD_SEND_STATUS ((u8)13)
#defineSD_CMD_HS_BUSTEST_READ ((u8)14)
#defineSD_CMD_GO_INACTIVE_STATE ((u8)15)
#defineSD_CMD_SET_BLOCKLEN ((u8)16)
#defineSD_CMD_READ_SINGLE_BLOCK ((u8)17)
#defineSD_CMD_READ_MULT_BLOCK ((u8)18)
#defineSD_CMD_HS_BUSTEST_WRITE ((u8)19)
#defineSD_CMD_WRITE_DAT_UNTIL_STOP ((u8)20)
#defineSD_CMD_SET_BLOCK_COUNT ((u8)23)
#defineSD_CMD_WRITE_SINGLE_BLOCK ((u8)24)
#defineSD_CMD_WRITE_MULT_BLOCK ((u8)25)
#defineSD_CMD_PROG_CID ((u8)26)
#defineSD_CMD_PROG_CSD ((u8)27)
#defineSD_CMD_SET_WRITE_PROT ((u8)28)
#defineSD_CMD_CLR_WRITE_PROT ((u8)29)
#defineSD_CMD_SEND_WRITE_PROT ((u8)30)
#defineSD_CMD_SD_ERASE_GRP_START ((u8)32) /*!< To set the address of the first write
block to be erased. (For SD card only) */
#defineSD_CMD_SD_ERASE_GRP_END ((u8)33) /*!< To set the address of the last write block of the
continuous range to be erased. (For SD card only) */
#defineSD_CMD_ERASE_GRP_START ((u8)35) /*!< To set the address of the first write block to be erased.
(For MMC card only spec 3.31) */
#defineSD_CMD_ERASE_GRP_END ((u8)36) /*!< To set the address of the last write block of the
continuous range to be erased. (For MMC card only spec 3.31) */
#defineSD_CMD_ERASE ((u8)38)
#defineSD_CMD_FAST_IO ((u8)39) /*!< SD Card doesn't support it */
#defineSD_CMD_GO_IRQ_STATE ((u8)40) /*!< SD Card doesn't support it */
#defineSD_CMD_LOCK_UNLOCK ((u8)42)
#defineSD_CMD_APP_CMD ((u8)55)
#defineSD_CMD_GEN_CMD ((u8)56)
#defineSD_CMD_NO_CMD ((u8)64)
/**
* @brief Following commands are SD CardSpecific commands.
* SDIO_APP_CMD ：CMD55 should be sent before sending these commands.
*/
#defineSD_CMD_APP_SD_SET_BUSWIDTH ((u8)6) /*!< For SD Card only*/
#defineSD_CMD_SD_APP_STAUS ((u8)13) /*!< For SD Card only */
#defineSD_CMD_SD_APP_SEND_NUM_WRITE_BLOCKS ((u8)22) /*!< For SD Card only */
#defineSD_CMD_SD_APP_OP_COND ((u8)41) /*!< For SD Card only */
#defineSD_CMD_SD_APP_SET_CLR_CARD_DETECT ((u8)42) /*!< For SD Card only */
#defineSD_CMD_SD_APP_SEND_SCR ((u8)51) /*!< For SD Card only */
#defineSD_CMD_SDIO_RW_DIRECT ((u8)52) /*!< For SD I/O Card only */
#defineSD_CMD_SDIO_RW_EXTENDED ((u8)53) /*!< For SD I/O Card only */
/**
* @brief Following commands are SD CardSpecific security commands.
* SDIO_APP_CMD should be sent beforesending these commands.
*/
#defineSD_CMD_SD_APP_GET_MKB ((u8)43) /*!< For SD Card only */
#defineSD_CMD_SD_APP_GET_MID ((u8)44) /*!< For SD Card only */
#define SD_CMD_SD_APP_SET_CER_RN1 ((u8)45) /*!< For SD Cardonly */
#defineSD_CMD_SD_APP_GET_CER_RN2 ((u8)46) /*!< For SD Card only */
#defineSD_CMD_SD_APP_SET_CER_RES2 ((u8)47) /*!< For SD Card only */
#define SD_CMD_SD_APP_GET_CER_RES1 ((u8)48) /*!< For SD Cardonly */
#defineSD_CMD_SD_APP_SECURE_READ_MULTIPLE_BLOCK ((u8)18) /*!< For SD Card only */
#defineSD_CMD_SD_APP_SECURE_WRITE_MULTIPLE_BLOCK ((u8)25) /*!< For SD Card only */
#defineSD_CMD_SD_APP_SECURE_ERASE ((u8)38) /*!< For SD Card only */
#defineSD_CMD_SD_APP_CHANGE_SECURE_AREA ((u8)49) /*!< For SD Card only */
#defineSD_CMD_SD_APP_SECURE_WRITE_MKB ((u8)48) /*!< For SD Card only */
//支持的SD卡定义
#defineSDIO_STD_CAPACITY_SD_CARD_V1_1 ((u32)0x00000000)
#defineSDIO_STD_CAPACITY_SD_CARD_V2_0 ((u32)0x00000001)
#defineSDIO_HIGH_CAPACITY_SD_CARD ((u32)0x00000002)
#defineSDIO_MULTIMEDIA_CARD ((u32)0x00000003)
#defineSDIO_SECURE_DIGITAL_IO_CARD ((u32)0x00000004)
#defineSDIO_HIGH_SPEED_MULTIMEDIA_CARD ((u32)0x00000005)
#defineSDIO_SECURE_DIGITAL_IO_COMBO_CARD ((u32)0x00000006)
#defineSDIO_HIGH_CAPACITY_MMC_CARD ((u32)0x00000007)
//SDIO相关参数定义
#defineNULL 0
#defineSDIO_STATIC_FLAGS ((u32)0x000005FF)
#defineSDIO_CMD0TIMEOUT ((u32)0x00010000)
#defineSDIO_DATATIMEOUT ((u32)0xFFFFFFFF)
#defineSDIO_FIFO_Address ((u32)0x40018080)
//Maskfor errors Card Status R1 (OCR Register)
#defineSD_OCR_ADDR_OUT_OF_RANGE ((u32)0x80000000)
#defineSD_OCR_ADDR_MISALIGNED ((u32)0x40000000)
#defineSD_OCR_BLOCK_LEN_ERR ((u32)0x20000000)
#defineSD_OCR_ERASE_SEQ_ERR ((u32)0x10000000)
#defineSD_OCR_BAD_ERASE_PARAM ((u32)0x08000000)
#defineSD_OCR_WRITE_PROT_VIOLATION ((u32)0x04000000)
#defineSD_OCR_LOCK_UNLOCK_FAILED ((u32)0x01000000)
#defineSD_OCR_COM_CRC_FAILED ((u32)0x00800000)
#defineSD_OCR_ILLEGAL_CMD ((u32)0x00400000)
#defineSD_OCR_CARD_ECC_FAILED ((u32)0x00200000)
#defineSD_OCR_CC_ERROR ((u32)0x00100000)
#defineSD_OCR_GENERAL_UNKNOWN_ERROR ((u32)0x00080000)
#defineSD_OCR_STREAM_READ_UNDERRUN ((u32)0x00040000)
#defineSD_OCR_STREAM_WRITE_OVERRUN ((u32)0x00020000)
#defineSD_OCR_CID_CSD_OVERWRIETE ((u32)0x00010000)
#defineSD_OCR_WP_ERASE_SKIP ((u32)0x00008000)
#defineSD_OCR_CARD_ECC_DISABLED ((u32)0x00004000)
#defineSD_OCR_ERASE_RESET ((u32)0x00002000)
#defineSD_OCR_AKE_SEQ_ERROR ((u32)0x00000008)
#defineSD_OCR_ERRORBITS ((u32)0xFDFFE008)
//Masks forR6 Response
#defineSD_R6_GENERAL_UNKNOWN_ERROR ((u32)0x00002000)
#defineSD_R6_ILLEGAL_CMD ((u32)0x00004000)
#defineSD_R6_COM_CRC_FAILED ((u32)0x00008000)
#defineSD_VOLTAGE_WINDOW_SD ((u32)0x80100000)
#defineSD_HIGH_CAPACITY ((u32)0x40000000)
#defineSD_STD_CAPACITY ((u32)0x00000000)
#defineSD_CHECK_PATTERN ((u32)0x000001AA)
#defineSD_VOLTAGE_WINDOW_MMC ((u32)0x80FF8000)
#defineSD_MAX_VOLT_TRIAL ((u32)0x0000FFFF)
#defineSD_ALLZERO ((u32)0x00000000)
#defineSD_WIDE_BUS_SUPPORT ((u32)0x00040000)
#defineSD_SINGLE_BUS_SUPPORT ((u32)0x00010000)
#defineSD_CARD_LOCKED ((u32)0x02000000)
#defineSD_CARD_PROGRAMMING ((u32)0x00000007)
#defineSD_CARD_RECEIVING ((u32)0x00000006)
#defineSD_DATATIMEOUT ((u32)0xFFFFFFFF)
#defineSD_0TO7BITS ((u32)0x000000FF)
#defineSD_8TO15BITS ((u32)0x0000FF00)
#defineSD_16TO23BITS ((u32)0x00FF0000)
#defineSD_24TO31BITS ((u32)0xFF000000)
#defineSD_MAX_DATA_LENGTH ((u32)0x01FFFFFF)
#defineSD_HALFFIFO ((u32)0x00000008)
#defineSD_HALFFIFOBYTES ((u32)0x00000020)
//CommandClass Supported
#defineSD_CCCC_LOCK_UNLOCK ((u32)0x00000080)
#defineSD_CCCC_WRITE_PROT ((u32)0x00000040)
#defineSD_CCCC_ERASE ((u32)0x00000020)
//CMD8指令
#defineSDIO_SEND_IF_COND ((u32)0x00000008)
////////////////////////////////////////////////////////////////////////////////////////////////////
//相关函数定义
SD_ErrorSD_Init(void);
void SDIO_Clock_Set(u8clkdiv);
SD_ErrorSD_PowerON(void);
SD_ErrorSD_PowerOFF(void);
SD_ErrorSD_InitializeCards(void);
SD_ErrorSD_GetCardInfo(SD_CardInfo *cardinfo);
SD_ErrorSD_EnableWideBusOperation(u32 wmode);
SD_ErrorSD_SetDeviceMode(u32 mode);
SD_ErrorSD_SelectDeselect(u32 addr);
SD_ErrorSD_SendStatus(uint32_t *pcardstatus);
SDCardStateSD_GetState(void);
SD_ErrorSD_ReadBlock(u8 *buf,long long addr,u16 blksize);
SD_ErrorSD_ReadMultiBlocks(u8 *buf,long long addr,u16 blksize,u32 nblks);
SD_ErrorSD_WriteBlock(u8 *buf,long long addr, u16 blksize);
SD_ErrorSD_WriteMultiBlocks(u8 *buf,long long addr,u16 blksize,u32 nblks);
SD_ErrorSD_ProcessIRQSrc(void);
voidSD_DMA_Config(u32*mbuf,u32 bufsize,u32 dir);
//voidSD_DMA_Config(u32*mbuf,u32 bufsize,u8 dir);
u8SD_ReadDisk(u8*buf,u32 sector,u8 cnt); //读SD卡,fatfs/usb调用
u8 SD_WriteDisk(u8*buf,u32 sector,u8 cnt); //写SD卡,fatfs/usb调用sdio_sdcard.c
/*用于sdio初始化的结构体*/
SDIO_InitTypeDefSDIO_InitStructure;
SDIO_CmdInitTypeDefSDIO_CmdInitStructure;
SDIO_DataInitTypeDefSDIO_DataInitStructure;
SD_ErrorCmdError(void);
SD_ErrorCmdResp7Error(void);
SD_ErrorCmdResp1Error(u8 cmd);
SD_ErrorCmdResp3Error(void);
SD_ErrorCmdResp2Error(void);
SD_ErrorCmdResp6Error(u8 cmd,u16*prca);
SD_ErrorSDEnWideBus(u8 enx);
SD_ErrorIsCardProgramming(u8 *pstatus);
SD_ErrorFindSCR(u16 rca,u32 *pscr);
u8convert_from_bytes_to_power_of_two(u16 NumberOfBytes);
static u8CardType=SDIO_STD_CAPACITY_SD_CARD_V1_1; //SD卡类型（默认为1.x卡）
staticu32 CSD_Tab[4],CID_Tab[4],RCA=0; //SD卡CSD,CID以及相对地址(RCA)数据
static u8DeviceMode=SD_DMA_MODE; //工作模式,注意,工作模式必须通过SD_SetDeviceMode,后才算数.这里只是定义一个默认的模式(SD_DMA_MODE)
static u8StopCondition=0; //是否发送停止传输标志位,DMA多块读写的时候用到
volatileSD_Error TransferError=SD_OK; //数据传输错误标志,DMA读写时使用
volatileu8 TransferEnd=0; //传输结束标志,DMA读写时使用
SD_CardInfoSDCardInfo; //SD卡信息
//SD_ReadDisk/SD_WriteDisk函数专用buf,当这两个函数的数据缓存区地址不是4字节对齐的时候,
//需要用到该数组,确保数据缓存区地址是4字节对齐的.
__align(4)u8 SDIO_DATA_BUFFER[512];
voidSDIO_Register_Deinit()
{
SDIO->POWER=0x00000000;
SDIO->CLKCR=0x00000000;
SDIO->ARG=0x00000000;
SDIO->CMD=0x00000000;
SDIO->DTIMER=0x00000000;
SDIO->DLEN=0x00000000;
SDIO->DCTRL=0x00000000;
SDIO->ICR=0x00C007FF;
SDIO->MASK=0x00000000;
}
//初始化SD卡
//返回值:错误代码;(0,无错误)
SD_ErrorSD_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
SD_Error errorstatus=SD_OK;
u8 clkdiv=0;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC|RCC_AHB1Periph_GPIOD|RCC_AHB1Periph_DMA2,ENABLE);//使能GPIOC,GPIOD DMA2时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SDIO,ENABLE);//SDIO时钟使能
RCC_APB2PeriphResetCmd(RCC_APB2Periph_SDIO,ENABLE);//SDIO复位
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_10|GPIO_Pin_11|GPIO_Pin_12; //PC8,9,10,11,12复用功能输出
GPIO_InitStructure.GPIO_Mode =GPIO_Mode_AF;//复用功能
GPIO_InitStructure.GPIO_Speed =GPIO_Speed_50MHz;//100M
GPIO_InitStructure.GPIO_OType =GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd =GPIO_PuPd_UP;//上拉
GPIO_Init(GPIOC, &GPIO_InitStructure);//PC8,9,10,11,12复用功能输出
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_2;
GPIO_Init(GPIOD,&GPIO_InitStructure);//PD2复用功能输出
//引脚复用映射设置
GPIO_PinAFConfig(GPIOC,GPIO_PinSource8,GPIO_AF_SDIO);//PC8,AF12
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);
RCC_APB2PeriphResetCmd(RCC_APB2Periph_SDIO,DISABLE);//SDIO结束复位
//SDIO外设寄存器设置为默认值
SDIO_Register_Deinit();
NVIC_InitStructure.NVIC_IRQChannel =SDIO_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0;//抢占优先级3
NVIC_InitStructure.NVIC_IRQChannelSubPriority=0; //子优先级3
NVIC_InitStructure.NVIC_IRQChannelCmd =ENABLE; //IRQ通道使能
NVIC_Init(&NVIC_InitStructure); //根据指定的参数初始化VIC寄存器、
errorstatus=SD_PowerON(); //SD卡上电
if(errorstatus==SD_OK)errorstatus=SD_InitializeCards(); //初始化SD卡
if(errorstatus==SD_OK)errorstatus=SD_GetCardInfo(&SDCardInfo); //获取卡信息
if(errorstatus==SD_OK)errorstatus=SD_SelectDeselect((u32)(SDCardInfo.RCA<<16));//选中SD卡
if(errorstatus==SD_OK)errorstatus=SD_EnableWideBusOperation(SDIO_BusWide_4b); //4位宽度,如果是MMC卡,则不能用4位模式
if((errorstatus==SD_OK)||(SDIO_MULTIMEDIA_CARD==CardType))
{
if(SDCardInfo.CardType==SDIO_STD_CAPACITY_SD_CARD_V1_1||SDCardInfo.CardType==SDIO_STD_CAPACITY_SD_CARD_V2_0)
{
clkdiv=SDIO_TRANSFER_CLK_DIV+2; //V1.1/V2.0卡，设置最高48/4=12Mhz
}elseclkdiv=SDIO_TRANSFER_CLK_DIV; //SDHC等其他卡，设置最高48/2=24Mhz
SDIO_Clock_Set(clkdiv); //设置时钟频率,SDIO时钟计算公式:SDIO_CK时钟=SDIOCLK/[clkdiv+2];其中,SDIOCLK固定为48Mhz
//errorstatus=SD_SetDeviceMode(SD_DMA_MODE); //设置为DMA模式
errorstatus=SD_SetDeviceMode(SD_POLLING_MODE);//设置为查询模式
}
return errorstatus;
}
//SDIO时钟初始化设置
//clkdiv:时钟分频系数
//CK时钟=SDIOCLK/[clkdiv+2];(SDIOCLK时钟固定为48Mhz)
void SDIO_Clock_Set(u8clkdiv)
{
u32 tmpreg=SDIO->CLKCR;
tmpreg&=0XFFFFFF00;
tmpreg|=clkdiv;
SDIO->CLKCR=tmpreg;
}
//卡上电
//查询所有SDIO接口上的卡设备,并查询其电压和配置时钟
//返回值:错误代码;(0,无错误)
SD_ErrorSD_PowerON(void)
{
u8i=0;
SD_Error errorstatus=SD_OK;
u32 response=0,count=0,validvoltage=0;
u32 SDType=SD_STD_CAPACITY;
/*初始化时的时钟不能大于400KHz*/
SDIO_InitStructure.SDIO_ClockDiv =SDIO_INIT_CLK_DIV; /* HCLK = 72MHz,SDIOCLK = 72MHz, SDIO_CK = HCLK/(178 + 2) = 400 KHz */
SDIO_InitStructure.SDIO_ClockEdge = SDIO_ClockEdge_Rising;
SDIO_InitStructure.SDIO_ClockBypass =SDIO_ClockBypass_Disable; //不使用bypass模式，直接用HCLK进行分频得到SDIO_CK
SDIO_InitStructure.SDIO_ClockPowerSave =SDIO_ClockPowerSave_Disable; // 空闲时不关闭时钟电源
SDIO_InitStructure.SDIO_BusWide =SDIO_BusWide_1b; //1位数据线
SDIO_InitStructure.SDIO_HardwareFlowControl =SDIO_HardwareFlowControl_Disable;//硬件流
SDIO_Init(&SDIO_InitStructure);
SDIO_SetPowerState(SDIO_PowerState_ON); //上电状态,开启卡时钟
SDIO->CLKCR|=1<<8; //SDIOCK使能
for(i=0;i<74;i++)
{
SDIO_CmdInitStructure.SDIO_Argument= 0x0;//发送CMD0进入IDLE STAGE模式命令.
SDIO_CmdInitStructure.SDIO_CmdIndex =SD_CMD_GO_IDLE_STATE; //cmd0
SDIO_CmdInitStructure.SDIO_Response =SDIO_Response_No; //无响应
SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
SDIO_CmdInitStructure.SDIO_CPSM =SDIO_CPSM_Enable; //则CPSM在开始发送命令之前等待数据传输结束。
SDIO_SendCommand(&SDIO_CmdInitStructure); //写命令进命令寄存器
errorstatus=CmdError();
if(errorstatus==SD_OK)break;
}
if(errorstatus)returnerrorstatus;//返回错误状态
SDIO_CmdInitStructure.SDIO_Argument =SD_CHECK_PATTERN; //发送CMD8,短响应,检查SD卡接口特性
SDIO_CmdInitStructure.SDIO_CmdIndex =SDIO_SEND_IF_COND; //cmd8
SDIO_CmdInitStructure.SDIO_Response =SDIO_Response_Short; //r7
SDIO_CmdInitStructure.SDIO_Wait =SDIO_Wait_No; //关闭等待中断
SDIO_CmdInitStructure.SDIO_CPSM =SDIO_CPSM_Enable;
SDIO_SendCommand(&SDIO_CmdInitStructure);
errorstatus=CmdResp7Error(); //等待R7响应
if(errorstatus==SD_OK) //R7响应正常
{
CardType=SDIO_STD_CAPACITY_SD_CARD_V2_0; //SD 2.0卡
SDType=SD_HIGH_CAPACITY; //高容量卡
}
SDIO_CmdInitStructure.SDIO_Argument = 0x00;//发送CMD55,短响应
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); //发送CMD55,短响应
errorstatus=CmdResp1Error(SD_CMD_APP_CMD); //等待R1响应
if(errorstatus==SD_OK)//SD2.0/SD 1.1,否则为MMC卡
{
//SD卡,发送ACMD41SD_APP_OP_COND,参数为:0x80100000
while((!validvoltage)&&(count<SD_MAX_VOLT_TRIAL))
{
SDIO_CmdInitStructure.SDIO_Argument = 0x00;//发送CMD55,短响应
SDIO_CmdInitStructure.SDIO_CmdIndex =SD_CMD_APP_CMD; //CMD55
SDIO_CmdInitStructure.SDIO_Response =SDIO_Response_Short;
SDIO_CmdInitStructure.SDIO_Wait =SDIO_Wait_No;
SDIO_CmdInitStructure.SDIO_CPSM =SDIO_CPSM_Enable;
SDIO_SendCommand(&SDIO_CmdInitStructure); //发送CMD55,短响应
errorstatus=CmdResp1Error(SD_CMD_APP_CMD); //等待R1响应
if(errorstatus!=SD_OK)returnerrorstatus; //响应错误
//acmd41，命令参数由支持的电压范围及HCS位组成，HCS位置一来区分卡是SDSc还是sdhc
SDIO_CmdInitStructure.SDIO_Argument =SD_VOLTAGE_WINDOW_SD | SDType; //发送ACMD41,短响应
SDIO_CmdInitStructure.SDIO_CmdIndex =SD_CMD_SD_APP_OP_COND;
SDIO_CmdInitStructure.SDIO_Response =SDIO_Response_Short; //r3
SDIO_CmdInitStructure.SDIO_Wait =SDIO_Wait_No;
SDIO_CmdInitStructure.SDIO_CPSM =SDIO_CPSM_Enable;
SDIO_SendCommand(&SDIO_CmdInitStructure);
errorstatus=CmdResp3Error(); //等待R3响应
if(errorstatus!=SD_OK)returnerrorstatus; //响应错误
response=SDIO->RESP1;; //得到响应
validvoltage=(((response>>31)==1)?1:0); //判断SD卡上电是否完成
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卡
{
//MMC卡,发送CMD1SDIO_SEND_OP_COND,参数为:0x80FF8000
while((!validvoltage)&&(count<SD_MAX_VOLT_TRIAL))
{
SDIO_CmdInitStructure.SDIO_Argument= SD_VOLTAGE_WINDOW_MMC;//发送CMD1,短响应
SDIO_CmdInitStructure.SDIO_CmdIndex =SD_CMD_SEND_OP_COND;
SDIO_CmdInitStructure.SDIO_Response =SDIO_Response_Short; //r3
SDIO_CmdInitStructure.SDIO_Wait =SDIO_Wait_No;
SDIO_CmdInitStructure.SDIO_CPSM =SDIO_CPSM_Enable;
SDIO_SendCommand(&SDIO_CmdInitStructure);
errorstatus=CmdResp3Error(); //等待R3响应
if(errorstatus!=SD_OK)returnerrorstatus; //响应错误
response=SDIO->RESP1;; //得到响应
validvoltage=(((response>>31)==1)?1:0);
count++;
}
if(count>=SD_MAX_VOLT_TRIAL)
{
errorstatus=SD_INVALID_VOLTRANGE;
return errorstatus;
}
CardType=SDIO_MULTIMEDIA_CARD;
}
return(errorstatus);
}
//SD卡 Power OFF
//返回值:错误代码;(0,无错误)
SD_ErrorSD_PowerOFF(void)
{
SDIO_SetPowerState(SDIO_PowerState_OFF);//SDIO电源关闭,时钟停止
return SD_OK;
}
//初始化所有的卡,并让卡进入就绪状态
//返回值:错误代码
SD_ErrorSD_InitializeCards(void)
{
SD_Errorerrorstatus=SD_OK;
u16 rca = 0x01;
if (SDIO_GetPowerState() ==SDIO_PowerState_OFF) //检查电源状态,确保为上电状态
{
errorstatus = SD_REQUEST_NOT_APPLICABLE;
return(errorstatus);
}
if(SDIO_SECURE_DIGITAL_IO_CARD!=CardType) //非SECURE_DIGITAL_IO_CARD
{
SDIO_CmdInitStructure.SDIO_Argument= 0x0;//发送CMD2,取得CID,长响应
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);//发送CMD2,取得CID,长响应
errorstatus=CmdResp2Error(); //等待R2响应
if(errorstatus!=SD_OK)returnerrorstatus; //响应错误
CID_Tab[0]=SDIO->RESP1;
CID_Tab[1]=SDIO->RESP2;
CID_Tab[2]=SDIO->RESP3;
CID_Tab[3]=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))//判断卡类型
{
SDIO_CmdInitStructure.SDIO_Argument= 0x00;//发送CMD3,短响应
SDIO_CmdInitStructure.SDIO_CmdIndex =SD_CMD_SET_REL_ADDR; //cmd3
SDIO_CmdInitStructure.SDIO_Response =SDIO_Response_Short; //r6
SDIO_CmdInitStructure.SDIO_Wait =SDIO_Wait_No;
SDIO_CmdInitStructure.SDIO_CPSM =SDIO_CPSM_Enable;
SDIO_SendCommand(&SDIO_CmdInitStructure); //发送CMD3,短响应
errorstatus=CmdResp6Error(SD_CMD_SET_REL_ADDR,&rca);//等待R6响应
if(errorstatus!=SD_OK)returnerrorstatus; //响应错误
}
if (SDIO_MULTIMEDIA_CARD==CardType)
{
SDIO_CmdInitStructure.SDIO_Argument =(u32)(rca<<16);//发送CMD3,短响应
SDIO_CmdInitStructure.SDIO_CmdIndex =SD_CMD_SET_REL_ADDR; //cmd3
SDIO_CmdInitStructure.SDIO_Response =SDIO_Response_Short; //r6
SDIO_CmdInitStructure.SDIO_Wait =SDIO_Wait_No;
SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
SDIO_SendCommand(&SDIO_CmdInitStructure); //发送CMD3,短响应
errorstatus=CmdResp2Error(); //等待R2响应
if(errorstatus!=SD_OK)returnerrorstatus; //响应错误
}
if(SDIO_SECURE_DIGITAL_IO_CARD!=CardType) //非SECURE_DIGITAL_IO_CARD
{
RCA = rca;
SDIO_CmdInitStructure.SDIO_Argument =(uint32_t)(rca << 16);//发送CMD9+卡RCA,取得CSD,长响应
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(); //等待R2响应
if(errorstatus!=SD_OK)returnerrorstatus; //响应错误
CSD_Tab[0]=SDIO->RESP1;
CSD_Tab[1]=SDIO->RESP2;
CSD_Tab[2]=SDIO->RESP3;
CSD_Tab[3]=SDIO->RESP4;
}
return SD_OK;//卡初始化成功
}
//得到卡信息
//cardinfo:卡信息存储区
//返回值:错误状态
SD_ErrorSD_GetCardInfo(SD_CardInfo *cardinfo)
{
SD_Errorerrorstatus=SD_OK;
u8 tmp=0;
cardinfo->CardType=(u8)CardType; //卡类型
cardinfo->RCA=(u16)RCA; //卡RCA值
tmp=(u8)((CSD_Tab[0]&0xFF000000)>>24);
cardinfo->SD_csd.CSDStruct=(tmp&0xC0)>>6; //CSD结构
cardinfo->SD_csd.SysSpecVersion=(tmp&0x3C)>>2; //2.0协议还没定义这部分(为保留),应该是后续协议定义的
cardinfo->SD_csd.Reserved1=tmp&0x03; //2个保留位
tmp=(u8)((CSD_Tab[0]&0x00FF0000)>>16); //第1个字节
cardinfo->SD_csd.TAAC=tmp; //数据读时间1
tmp=(u8)((CSD_Tab[0]&0x0000FF00)>>8); //第2个字节
cardinfo->SD_csd.NSAC=tmp; //数据读时间2
tmp=(u8)(CSD_Tab[0]&0x000000FF); //第3个字节
cardinfo->SD_csd.MaxBusClkFrec=tmp; //传输速度
tmp=(u8)((CSD_Tab[1]&0xFF000000)>>24); //第4个字节
cardinfo->SD_csd.CardComdClasses=tmp<<4; //卡指令类高四位
tmp=(u8)((CSD_Tab[1]&0x00FF0000)>>16); //第5个字节
cardinfo->SD_csd.CardComdClasses|=(tmp&0xF0)>>4;//卡指令类低四位
cardinfo->SD_csd.RdBlockLen=tmp&0x0F; //最大读取数据长度
tmp=(u8)((CSD_Tab[1]&0x0000FF00)>>8); //第6个字节
cardinfo->SD_csd.PartBlockRead=(tmp&0x80)>>7; //允许分块读
cardinfo->SD_csd.WrBlockMisalign=(tmp&0x40)>>6; //写块错位
cardinfo->SD_csd.RdBlockMisalign=(tmp&0x20)>>5; //读块错位
cardinfo->SD_csd.DSRImpl=(tmp&0x10)>>4;
cardinfo->SD_csd.Reserved2=0; //保留
if((CardType==SDIO_STD_CAPACITY_SD_CARD_V1_1)||(CardType==SDIO_STD_CAPACITY_SD_CARD_V2_0)||(SDIO_MULTIMEDIA_CARD==CardType))//标准1.1/2.0卡/MMC卡
{
cardinfo->SD_csd.DeviceSize=(tmp&0x03)<<10; //C_SIZE(12位)
tmp=(u8)(CSD_Tab[1]&0x000000FF); //第7个字节
cardinfo->SD_csd.DeviceSize|=(tmp)<<2;
tmp=(u8)((CSD_Tab[2]&0xFF000000)>>24); //第8个字节
cardinfo->SD_csd.DeviceSize|=(tmp&0xC0)>>6;
cardinfo->SD_csd.MaxRdCurrentVDDMin=(tmp&0x38)>>3;
cardinfo->SD_csd.MaxRdCurrentVDDMax=(tmp&0x07);
tmp=(u8)((CSD_Tab[2]&0x00FF0000)>>16); //第9个字节
cardinfo->SD_csd.MaxWrCurrentVDDMin=(tmp&0xE0)>>5;
cardinfo->SD_csd.MaxWrCurrentVDDMax=(tmp&0x1C)>>2;
cardinfo->SD_csd.DeviceSizeMul=(tmp&0x03)<<1;//C_SIZE_MULT
tmp=(u8)((CSD_Tab[2]&0x0000FF00)>>8); //第10个字节
cardinfo->SD_csd.DeviceSizeMul|=(tmp&0x80)>>7;
cardinfo->CardCapacity=(cardinfo->SD_csd.DeviceSize+1);//计算卡容量
cardinfo->CardCapacity*=(1<<(cardinfo->SD_csd.DeviceSizeMul+2));
cardinfo->CardBlockSize=1<<(cardinfo->SD_csd.RdBlockLen);//块大小
cardinfo->CardCapacity*=cardinfo->CardBlockSize;
}else if(CardType==SDIO_HIGH_CAPACITY_SD_CARD) //高容量卡
{
tmp=(u8)(CSD_Tab[1]&0x000000FF); //第7个字节
cardinfo->SD_csd.DeviceSize=(tmp&0x3F)<<16;//C_SIZE
tmp=(u8)((CSD_Tab[2]&0xFF000000)>>24); //第8个字节
cardinfo->SD_csd.DeviceSize|=(tmp<<8);
tmp=(u8)((CSD_Tab[2]&0x00FF0000)>>16); //第9个字节
cardinfo->SD_csd.DeviceSize|=(tmp);
tmp=(u8)((CSD_Tab[2]&0x0000FF00)>>8); //第10个字节
cardinfo->CardCapacity=(longlong)(cardinfo->SD_csd.DeviceSize+1)*512*1024;//计算卡容量
cardinfo->CardBlockSize=512; //块大小固定为512字节
}
cardinfo->SD_csd.EraseGrSize=(tmp&0x40)>>6;
cardinfo->SD_csd.EraseGrMul=(tmp&0x3F)<<1;
tmp=(u8)(CSD_Tab[2]&0x000000FF); //第11个字节
cardinfo->SD_csd.EraseGrMul|=(tmp&0x80)>>7;
cardinfo->SD_csd.WrProtectGrSize=(tmp&0x7F);
tmp=(u8)((CSD_Tab[3]&0xFF000000)>>24); //第12个字节
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;
tmp=(u8)((CSD_Tab[3]&0x00FF0000)>>16); //第13个字节
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);
tmp=(u8)((CSD_Tab[3]&0x0000FF00)>>8); //第14个字节
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);
tmp=(u8)(CSD_Tab[3]&0x000000FF); //第15个字节
cardinfo->SD_csd.CSD_CRC=(tmp&0xFE)>>1;
cardinfo->SD_csd.Reserved4=1;
tmp=(u8)((CID_Tab[0]&0xFF000000)>>24); //第0个字节
cardinfo->SD_cid.ManufacturerID=tmp;
tmp=(u8)((CID_Tab[0]&0x00FF0000)>>16); //第1个字节
cardinfo->SD_cid.OEM_AppliID=tmp<<8;
tmp=(u8)((CID_Tab[0]&0x000000FF00)>>8); //第2个字节
cardinfo->SD_cid.OEM_AppliID|=tmp;
tmp=(u8)(CID_Tab[0]&0x000000FF); //第3个字节
cardinfo->SD_cid.ProdName1=tmp<<24;
tmp=(u8)((CID_Tab[1]&0xFF000000)>>24); //第4个字节
cardinfo->SD_cid.ProdName1|=tmp<<16;
tmp=(u8)((CID_Tab[1]&0x00FF0000)>>16); //第5个字节
cardinfo->SD_cid.ProdName1|=tmp<<8;
tmp=(u8)((CID_Tab[1]&0x0000FF00)>>8); //第6个字节
cardinfo->SD_cid.ProdName1|=tmp;
tmp=(u8)(CID_Tab[1]&0x000000FF); //第7个字节
cardinfo->SD_cid.ProdName2=tmp;
tmp=(u8)((CID_Tab[2]&0xFF000000)>>24); //第8个字节
cardinfo->SD_cid.ProdRev=tmp;
tmp=(u8)((CID_Tab[2]&0x00FF0000)>>16); //第9个字节
cardinfo->SD_cid.ProdSN=tmp<<24;
tmp=(u8)((CID_Tab[2]&0x0000FF00)>>8); //第10个字节
cardinfo->SD_cid.ProdSN|=tmp<<16;
tmp=(u8)(CID_Tab[2]&0x000000FF); //第11个字节
cardinfo->SD_cid.ProdSN|=tmp<<8;
tmp=(u8)((CID_Tab[3]&0xFF000000)>>24); //第12个字节
cardinfo->SD_cid.ProdSN|=tmp;
tmp=(u8)((CID_Tab[3]&0x00FF0000)>>16); //第13个字节
cardinfo->SD_cid.Reserved1|=(tmp&0xF0)>>4;
cardinfo->SD_cid.ManufactDate=(tmp&0x0F)<<8;
tmp=(u8)((CID_Tab[3]&0x0000FF00)>>8); //第14个字节
cardinfo->SD_cid.ManufactDate|=tmp;
tmp=(u8)(CID_Tab[3]&0x000000FF); //第15个字节
cardinfo->SD_cid.CID_CRC=(tmp&0xFE)>>1;
cardinfo->SD_cid.Reserved2=1;
return errorstatus;
}
//设置SDIO总线宽度(MMC卡不支持4bit模式)
//wmode:位宽模式.0,1位数据宽度;1,4位数据宽度;2,8位数据宽度
//返回值:SD卡错误状态
//设置SDIO总线宽度(MMC卡不支持4bit模式)
// @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 (默认)
//返回值:SD卡错误状态
SD_ErrorSD_EnableWideBusOperation(u32 WideMode)
{
SD_Errorerrorstatus=SD_OK;
if (SDIO_MULTIMEDIA_CARD == CardType)
{
errorstatus = SD_UNSUPPORTED_FEATURE;
return(errorstatus);
}
elseif((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) //2.0 sd不支持8bits
{
errorstatus = SD_UNSUPPORTED_FEATURE;
return(errorstatus);
}
else
{
errorstatus=SDEnWideBus(WideMode);
if(SD_OK==errorstatus)
{
SDIO->CLKCR&=~(3<<11); //清除之前的位宽设置
SDIO->CLKCR|=WideMode;//1位/4位总线宽度
SDIO->CLKCR|=0<<14; //不开启硬件流控制
}
}
}
return errorstatus;
}
//设置SD卡工作模式
//Mode:
//返回值:错误状态
SD_ErrorSD_SetDeviceMode(u32 Mode)
{
SD_Error errorstatus = SD_OK;
if((Mode==SD_DMA_MODE)||(Mode==SD_POLLING_MODE))DeviceMode=Mode;
else errorstatus=SD_INVALID_PARAMETER;
return errorstatus;
}
//选卡
//发送CMD7,选择相对地址(rca)为addr的卡,取消其他卡.如果为0,则都不选择.
//addr:卡的RCA地址
SD_ErrorSD_SelectDeselect(u32 addr)
{
SDIO_CmdInitStructure.SDIO_Argument = addr;//发送CMD7,选择卡,短响应
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);//发送CMD7,选择卡,短响应
returnCmdResp1Error(SD_CMD_SEL_DESEL_CARD);
}
//SD卡读取一个块
//buf:读数据缓存区(必须4字节对齐!!)
//addr:读取地址
//blksize:块大小
SD_ErrorSD_ReadBlock(u8 *buf,long long addr,u16 blksize)
{
SD_Error errorstatus=SD_OK;
u8 power;
u32 count=0,*tempbuff=(u32*)buf;//转换为u32指针
u32 timeout=SDIO_DATATIMEOUT;
if(NULL==buf)
return SD_INVALID_PARAMETER;
SDIO->DCTRL=0x0; //数据控制寄存器清零(关DMA)
if(CardType==SDIO_HIGH_CAPACITY_SD_CARD)//大容量卡
{
blksize=512;
addr>>=9;
}
SDIO_DataInitStructure.SDIO_DataBlockSize=SDIO_DataBlockSize_1b ;//清除DPSM状态机配置
SDIO_DataInitStructure.SDIO_DataLength= 0 ;
SDIO_DataInitStructure.SDIO_DataTimeOut=SD_DATATIMEOUT ;
SDIO_DataInitStructure.SDIO_DPSM=SDIO_DPSM_Enable;
SDIO_DataInitStructure.SDIO_TransferDir=SDIO_TransferDir_ToCard;
SDIO_DataInitStructure.SDIO_TransferMode=SDIO_TransferMode_Block;
SDIO_DataConfig(&SDIO_DataInitStructure);
if(SDIO->RESP1&SD_CARD_LOCKED)returnSD_LOCK_UNLOCK_FAILED;//卡锁了
if((blksize>0)&&(blksize<=2048)&&((blksize&(blksize-1))==0))
{
power=convert_from_bytes_to_power_of_two(blksize);
SDIO_CmdInitStructure.SDIO_Argument= blksize;
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);//发送CMD16+设置数据长度为blksize,短响应
errorstatus=CmdResp1Error(SD_CMD_SET_BLOCKLEN); //等待R1响应
if(errorstatus!=SD_OK)returnerrorstatus; //响应错误
}else return SD_INVALID_PARAMETER;
SDIO_DataInitStructure.SDIO_DataBlockSize= power<<4 ;//清除DPSM状态机配置
SDIO_DataInitStructure.SDIO_DataLength= blksize ;
SDIO_DataInitStructure.SDIO_DataTimeOut=SD_DATATIMEOUT ;
SDIO_DataInitStructure.SDIO_DPSM=SDIO_DPSM_Enable;
SDIO_DataInitStructure.SDIO_TransferDir=SDIO_TransferDir_ToSDIO;
SDIO_DataInitStructure.SDIO_TransferMode=SDIO_TransferMode_Block;
SDIO_DataConfig(&SDIO_DataInitStructure);
SDIO_CmdInitStructure.SDIO_Argument = addr;
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);//发送CMD17+从addr地址出读取数据,短响应
errorstatus=CmdResp1Error(SD_CMD_READ_SINGLE_BLOCK);//等待R1响应
if(errorstatus!=SD_OK)returnerrorstatus; //响应错误
if(DeviceMode==SD_POLLING_MODE) //查询模式,轮询数据
{
INTX_DISABLE();//关闭总中断(POLLING模式,严禁中断打断SDIO读写操作!!!)
while(!(SDIO->STA&((1<<5)|(1<<1)|(1<<3)|(1<<10)|(1<<9))))//无上溢/CRC/超时/完成(标志)/起始位错误
{
if(SDIO_GetFlagStatus(SDIO_FLAG_RXFIFOHF)!= RESET) //接收区半满,表示至少存了8个字
{
for(count=0;count<8;count++) //循环读取数据
{
*(tempbuff+count)=SDIO->FIFO;
}
tempbuff+=8;
timeout=0X7FFFFF; //读数据溢出时间
}else //处理超时
{
if(timeout==0)returnSD_DATA_TIMEOUT;
timeout--;
}
}
if(SDIO_GetFlagStatus(SDIO_FLAG_DTIMEOUT)!= RESET) //数据超时错误
{
SDIO_ClearFlag(SDIO_FLAG_DTIMEOUT); //清错误标志
returnSD_DATA_TIMEOUT;
}elseif(SDIO_GetFlagStatus(SDIO_FLAG_DCRCFAIL) != RESET) //数据块CRC错误
{
SDIO_ClearFlag(SDIO_FLAG_DCRCFAIL); //清错误标志
returnSD_DATA_CRC_FAIL;
}elseif(SDIO_GetFlagStatus(SDIO_FLAG_RXOVERR) != RESET) //接收fifo上溢错误
{
SDIO_ClearFlag(SDIO_FLAG_RXOVERR); //清错误标志
returnSD_RX_OVERRUN;
}elseif(SDIO_GetFlagStatus(SDIO_FLAG_STBITERR) != RESET) //接收起始位错误
{
SDIO_ClearFlag(SDIO_FLAG_STBITERR);//清错误标志
returnSD_START_BIT_ERR;
}
while(SDIO_GetFlagStatus(SDIO_FLAG_RXDAVL)!= RESET) //FIFO里面,还存在可用数据
{
*tempbuff=SDIO->FIFO; //循环读取数据
tempbuff++;
}
INTX_ENABLE();//开启总中断
SDIO_ClearFlag(SDIO_STATIC_FLAGS);//清除所有标记
}else if(DeviceMode==SD_DMA_MODE)
{
TransferError=SD_OK;
StopCondition=0; //单块读,不需要发送停止传输指令
TransferEnd=0; //传输结束标置位，在中断服务置1
SDIO->MASK|=(1<<1)|(1<<3)|(1<<8)|(1<<5)|(1<<9); //配置需要的中断
SDIO->DCTRL|=1<<3; //SDIODMA使能
SD_DMA_Config((u32*)buf,blksize,DMA_DIR_PeripheralToMemory);
while(((DMA2->LISR&(1<<27))==RESET)&&(TransferEnd==0)&&(TransferError==SD_OK)&&timeout)timeout--;//等待传输完成
if(timeout==0)returnSD_DATA_TIMEOUT;//超时
if(TransferError!=SD_OK)errorstatus=TransferError;
}
returnerrorstatus;
}
//SD卡读取多个块
//buf:读数据缓存区
//addr:读取地址
//blksize:块大小
//nblks:要读取的块数
//返回值:错误状态
__align(4)u32 *tempbuff;
SD_ErrorSD_ReadMultiBlocks(u8 *buf,long long addr,u16 blksize,u32 nblks)
{
SD_Error errorstatus=SD_OK;
u8 power;
u32 count=0;
u32 timeout=SDIO_DATATIMEOUT;
tempbuff=(u32*)buf;//转换为u32指针
SDIO->DCTRL=0x0; //数据控制寄存器清零(关DMA)
if(CardType==SDIO_HIGH_CAPACITY_SD_CARD)//大容量卡
{
blksize=512;
addr>>=9;
}
SDIO_DataInitStructure.SDIO_DataBlockSize= 0; ;//清除DPSM状态机配置
SDIO_DataInitStructure.SDIO_DataLength= 0 ;
SDIO_DataInitStructure.SDIO_DataTimeOut=SD_DATATIMEOUT ;
SDIO_DataInitStructure.SDIO_DPSM=SDIO_DPSM_Enable;
SDIO_DataInitStructure.SDIO_TransferDir=SDIO_TransferDir_ToCard;
SDIO_DataInitStructure.SDIO_TransferMode=SDIO_TransferMode_Block;
SDIO_DataConfig(&SDIO_DataInitStructure);
if(SDIO->RESP1&SD_CARD_LOCKED)returnSD_LOCK_UNLOCK_FAILED;//卡锁了
if((blksize>0)&&(blksize<=2048)&&((blksize&(blksize-1))==0))
{
power=convert_from_bytes_to_power_of_two(blksize);
SDIO_CmdInitStructure.SDIO_Argument = blksize;//发送CMD16+设置数据长度为blksize,短响应
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); //等待R1响应
if(errorstatus!=SD_OK)returnerrorstatus; //响应错误
}else return SD_INVALID_PARAMETER;
if(nblks>1) //多块读
{
if(nblks*blksize>SD_MAX_DATA_LENGTH)returnSD_INVALID_PARAMETER;//判断是否超过最大接收长度
SDIO_DataInitStructure.SDIO_DataBlockSize=power<<4; ;//nblks*blksize,512块大小,卡到控制器
SDIO_DataInitStructure.SDIO_DataLength= nblks*blksize;
SDIO_DataInitStructure.SDIO_DataTimeOut=SD_DATATIMEOUT;
SDIO_DataInitStructure.SDIO_DPSM=SDIO_DPSM_Enable;
SDIO_DataInitStructure.SDIO_TransferDir=SDIO_TransferDir_ToSDIO;
SDIO_DataInitStructure.SDIO_TransferMode=SDIO_TransferMode_Block;
SDIO_DataConfig(&SDIO_DataInitStructure);
SDIO_CmdInitStructure.SDIO_Argument= addr;//发送CMD18+从addr地址出读取数据,短响应
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);//等待R1响应
if(errorstatus!=SD_OK)returnerrorstatus; //响应错误
if(DeviceMode==SD_POLLING_MODE)
{
INTX_DISABLE();//关闭总中断(POLLING模式,严禁中断打断SDIO读写操作!!!)
while(!(SDIO->STA&((1<<5)|(1<<1)|(1<<3)|(1<<8)|(1<<9))))//无上溢/CRC/超时/完成(标志)/起始位错误
{
if(SDIO_GetFlagStatus(SDIO_FLAG_RXFIFOHF)!= RESET) //接收区半满,表示至少存了8个字
{
for(count=0;count<8;count++) //循环读取数据
{
*(tempbuff+count)=SDIO->FIFO;
}
tempbuff+=8;
timeout=0X7FFFFF; //读数据溢出时间
}else //处理超时
{
if(timeout==0)return SD_DATA_TIMEOUT;
timeout--;
}
}
if(SDIO_GetFlagStatus(SDIO_FLAG_DTIMEOUT)!= RESET) //数据超时错误
{
SDIO_ClearFlag(SDIO_FLAG_DTIMEOUT); //清错误标志
returnSD_DATA_TIMEOUT;
}else if(SDIO_GetFlagStatus(SDIO_FLAG_DCRCFAIL)!= RESET) //数据块CRC错误
{
SDIO_ClearFlag(SDIO_FLAG_DCRCFAIL); //清错误标志
returnSD_DATA_CRC_FAIL;
}elseif(SDIO_GetFlagStatus(SDIO_FLAG_RXOVERR) != RESET) //接收fifo上溢错误
{
SDIO_ClearFlag(SDIO_FLAG_RXOVERR); //清错误标志
returnSD_RX_OVERRUN;
}elseif(SDIO_GetFlagStatus(SDIO_FLAG_STBITERR) != RESET) //接收起始位错误
{
SDIO_ClearFlag(SDIO_FLAG_STBITERR);//清错误标志
returnSD_START_BIT_ERR;
}
while(SDIO_GetFlagStatus(SDIO_FLAG_RXDAVL)!= RESET) //FIFO里面,还存在可用数据
{
*tempbuff=SDIO->FIFO; //循环读取数据
tempbuff++;
}
if(SDIO_GetFlagStatus(SDIO_FLAG_DATAEND)!= RESET) //接收结束
{
if((SDIO_STD_CAPACITY_SD_CARD_V1_1==CardType)||(SDIO_STD_CAPACITY_SD_CARD_V2_0==CardType)||(SDIO_HIGH_CAPACITY_SD_CARD==CardType))
{
SDIO_CmdInitStructure.SDIO_Argument= 0;//发送CMD12+结束传输
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);//等待R1响应
if(errorstatus!=SD_OK)returnerrorstatus;
}
}
INTX_ENABLE();//开启总中断
SDIO_ClearFlag(SDIO_STATIC_FLAGS);//清除所有标记
}elseif(DeviceMode==SD_DMA_MODE)
{
TransferError=SD_OK;
StopCondition=1; //多块读,需要发送停止传输指令
TransferEnd=0; //传输结束标置位，在中断服务置1
SDIO->MASK|=(1<<1)|(1<<3)|(1<<8)|(1<<5)|(1<<9); //配置需要的中断
SDIO->DCTRL|=1<<3; //SDIODMA使能
SD_DMA_Config((u32*)buf,nblks*blksize,DMA_DIR_PeripheralToMemory);
while(((DMA2->LISR&(1<<27))==RESET)&&timeout)timeout--;//等待传输完成
if(timeout==0)returnSD_DATA_TIMEOUT;//超时
while((TransferEnd==0)&&(TransferError==SD_OK));
if(TransferError!=SD_OK)errorstatus=TransferError;
}
}
return errorstatus;
}
//SD卡写1个块
//buf:数据缓存区
//addr:写地址
//blksize:块大小
//返回值:错误状态
SD_Error SD_WriteBlock(u8*buf,long long addr, u16 blksize)
{
SD_Error errorstatus = SD_OK;
u8 power=0,cardstate=0;
u32 timeout=0,bytestransferred=0;
u32 cardstatus=0,count=0,restwords=0;
u32 tlen=blksize; //总长度(字节)
u32*tempbuff=(u32*)buf;
if(buf==NULL)returnSD_INVALID_PARAMETER;//参数错误
SDIO->DCTRL=0x0; //数据控制寄存器清零(关DMA)
SDIO_DataInitStructure.SDIO_DataBlockSize=0; ;//清除DPSM状态机配置
SDIO_DataInitStructure.SDIO_DataLength=0 ;
SDIO_DataInitStructure.SDIO_DataTimeOut=SD_DATATIMEOUT;
SDIO_DataInitStructure.SDIO_DPSM=SDIO_DPSM_Enable;
SDIO_DataInitStructure.SDIO_TransferDir=SDIO_TransferDir_ToCard;
SDIO_DataInitStructure.SDIO_TransferMode=SDIO_TransferMode_Block;
SDIO_DataConfig(&SDIO_DataInitStructure);
if(SDIO->RESP1&SD_CARD_LOCKED)returnSD_LOCK_UNLOCK_FAILED;//卡锁了
if(CardType==SDIO_HIGH_CAPACITY_SD_CARD) //大容量卡
{
blksize=512;
addr>>=9;
}
if((blksize>0)&&(blksize<=2048)&&((blksize&(blksize-1))==0))
{
power=convert_from_bytes_to_power_of_two(blksize);
SDIO_CmdInitStructure.SDIO_Argument= blksize;//发送CMD16+设置数据长度为blksize,短响应
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); //等待R1响应
if(errorstatus!=SD_OK)returnerrorstatus; //响应错误
}else return SD_INVALID_PARAMETER;
SDIO_CmdInitStructure.SDIO_Argument= (u32)RCA<<16;//发送CMD13,查询卡的状态,短响应
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); //等待R1响应
if(errorstatus!=SD_OK)returnerrorstatus;
cardstatus=SDIO->RESP1;
timeout=SD_DATATIMEOUT;
while(((cardstatus&0x00000100)==0)&&(timeout>0)) //检查READY_FOR_DATA位是否置位
{
timeout--;
SDIO_CmdInitStructure.SDIO_Argument= (u32)RCA<<16;//发送CMD13,查询卡的状态,短响应
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); //等待R1响应
if(errorstatus!=SD_OK)returnerrorstatus;
cardstatus=SDIO->RESP1;
}
if(timeout==0)return SD_ERROR;
SDIO_CmdInitStructure.SDIO_Argument= addr;//发送CMD24,写单块指令,短响应
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);//等待R1响应
if(errorstatus!=SD_OK)returnerrorstatus;
StopCondition=0; //单块写,不需要发送停止传输指令
SDIO_DataInitStructure.SDIO_DataBlockSize=power<<4; ; //blksize, 控制器到卡
SDIO_DataInitStructure.SDIO_DataLength=blksize ;
SDIO_DataInitStructure.SDIO_DataTimeOut=SD_DATATIMEOUT;
SDIO_DataInitStructure.SDIO_DPSM=SDIO_DPSM_Enable;
SDIO_DataInitStructure.SDIO_TransferDir=SDIO_TransferDir_ToCard;
SDIO_DataInitStructure.SDIO_TransferMode=SDIO_TransferMode_Block;
SDIO_DataConfig(&SDIO_DataInitStructure);
timeout=SDIO_DATATIMEOUT;
if (DeviceMode == SD_POLLING_MODE)
{
INTX_DISABLE();//关闭总中断(POLLING模式,严禁中断打断SDIO读写操作!!!)
while(!(SDIO->STA&((1<<10)|(1<<4)|(1<<1)|(1<<3)|(1<<9))))//数据块发送成功/下溢/CRC/超时/起始位错误
{
if(SDIO_GetFlagStatus(SDIO_FLAG_TXFIFOHE)!= RESET) //发送区半空,表示至少存了8个字
{
if((tlen-bytestransferred)<SD_HALFFIFOBYTES)//不够32字节了
{
restwords=((tlen-bytestransferred)%4==0)?((tlen-bytestransferred)/4):((tlen-bytestransferred)/4+1);
for(count=0;count<restwords;count++,tempbuff++,bytestransferred+=4)
{
SDIO->FIFO=*tempbuff;
}
}else
{
for(count=0;count<8;count++)
{
SDIO->FIFO=*(tempbuff+count);
}
tempbuff+=8;
bytestransferred+=32;
}
timeout=0X3FFFFFFF; //写数据溢出时间
}else
{
if(timeout==0)returnSD_DATA_TIMEOUT;
timeout--;
}
}
if(SDIO_GetFlagStatus(SDIO_FLAG_DTIMEOUT)!= RESET) //数据超时错误
{
SDIO_ClearFlag(SDIO_FLAG_DTIMEOUT); //清错误标志
returnSD_DATA_TIMEOUT;
}elseif(SDIO_GetFlagStatus(SDIO_FLAG_DCRCFAIL) != RESET) //数据块CRC错误
{
SDIO_ClearFlag(SDIO_FLAG_DCRCFAIL); //清错误标志
returnSD_DATA_CRC_FAIL;
}elseif(SDIO_GetFlagStatus(SDIO_FLAG_TXUNDERR) != RESET) //接收fifo下溢错误
{
SDIO_ClearFlag(SDIO_FLAG_TXUNDERR); //清错误标志
returnSD_TX_UNDERRUN;
}elseif(SDIO_GetFlagStatus(SDIO_FLAG_STBITERR) != RESET) //接收起始位错误
{
SDIO_ClearFlag(SDIO_FLAG_STBITERR);//清错误标志
returnSD_START_BIT_ERR;
}
INTX_ENABLE();//开启总中断
SDIO_ClearFlag(SDIO_STATIC_FLAGS);//清除所有标记
}else if(DeviceMode==SD_DMA_MODE)
{
TransferError=SD_OK;
StopCondition=0; //单块写,不需要发送停止传输指令
TransferEnd=0; //传输结束标置位，在中断服务置1
SDIO->MASK|=(1<<1)|(1<<3)|(1<<8)|(1<<4)|(1<<9); //配置产生数据接收完成中断
SD_DMA_Config((u32*)buf,blksize,DMA_DIR_MemoryToPeripheral); //SDIO DMA配置
SDIO->DCTRL|=1<<3; //SDIODMA使能.
while(((DMA2->LISR&(1<<27))==RESET)&&timeout)timeout--;//等待传输完成
if(timeout==0)
{
SD_Init(); //重新初始化SD卡,可以解决写入死机的问题
returnSD_DATA_TIMEOUT; //超时
}
timeout=SDIO_DATATIMEOUT;
while((TransferEnd==0)&&(TransferError==SD_OK)&&timeout)timeout--;
if(timeout==0)returnSD_DATA_TIMEOUT; //超时
if(TransferError!=SD_OK)returnTransferError;
}
SDIO_ClearFlag(SDIO_STATIC_FLAGS);//清除所有标记
errorstatus=IsCardProgramming(&cardstate);
while((errorstatus==SD_OK)&&((cardstate==SD_CARD_PROGRAMMING)||(cardstate==SD_CARD_RECEIVING)))
{
errorstatus=IsCardProgramming(&cardstate);
}
return errorstatus;
}
//SD卡写多个块
//buf:数据缓存区
//addr:写地址
//blksize:块大小
//nblks:要写入的块数
//返回值:错误状态
SD_ErrorSD_WriteMultiBlocks(u8 *buf,long long addr,u16 blksize,u32 nblks)
{
SD_Error errorstatus = SD_OK;
u8 power = 0, cardstate = 0;
u32 timeout=0,bytestransferred=0;
u32 count = 0, restwords = 0;
u32 tlen=nblks*blksize; //总长度(字节)
u32 *tempbuff = (u32*)buf;
if(buf==NULL)return SD_INVALID_PARAMETER; //参数错误
SDIO->DCTRL=0x0; //数据控制寄存器清零(关DMA)
SDIO_DataInitStructure.SDIO_DataBlockSize=0; ; //清除DPSM状态机配置
SDIO_DataInitStructure.SDIO_DataLength=0 ;
SDIO_DataInitStructure.SDIO_DataTimeOut=SD_DATATIMEOUT;
SDIO_DataInitStructure.SDIO_DPSM=SDIO_DPSM_Enable;
SDIO_DataInitStructure.SDIO_TransferDir=SDIO_TransferDir_ToCard;
SDIO_DataInitStructure.SDIO_TransferMode=SDIO_TransferMode_Block;
SDIO_DataConfig(&SDIO_DataInitStructure);
if(SDIO->RESP1&SD_CARD_LOCKED)returnSD_LOCK_UNLOCK_FAILED;//卡锁了
if(CardType==SDIO_HIGH_CAPACITY_SD_CARD)//大容量卡
{
blksize=512;
addr>>=9;
}
if((blksize>0)&&(blksize<=2048)&&((blksize&(blksize-1))==0))
{
power=convert_from_bytes_to_power_of_two(blksize);
SDIO_CmdInitStructure.SDIO_Argument= blksize; //发送CMD16+设置数据长度为blksize,短响应
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); //等待R1响应
if(errorstatus!=SD_OK)returnerrorstatus; //响应错误
}else return SD_INVALID_PARAMETER;
if(nblks>1)
{
if(nblks*blksize>SD_MAX_DATA_LENGTH)returnSD_INVALID_PARAMETER;
if((SDIO_STD_CAPACITY_SD_CARD_V1_1==CardType)||(SDIO_STD_CAPACITY_SD_CARD_V2_0==CardType)||(SDIO_HIGH_CAPACITY_SD_CARD==CardType))
{
//提高性能
SDIO_CmdInitStructure.SDIO_Argument= (u32)RCA<<16; //发送ACMD55,短响应
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); //等待R1响应
if(errorstatus!=SD_OK)returnerrorstatus;
SDIO_CmdInitStructure.SDIO_Argument=nblks; //发送CMD23,设置块数量,短响应
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);//等待R1响应
if(errorstatus!=SD_OK)returnerrorstatus;
}
SDIO_CmdInitStructure.SDIO_Argument=addr; //发送CMD25,多块写指令,短响应
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); //等待R1响应
if(errorstatus!=SD_OK)returnerrorstatus;
SDIO_DataInitStructure.SDIO_DataBlockSize= power<<4; ; //blksize, 控制器到卡
SDIO_DataInitStructure.SDIO_DataLength=nblks*blksize ;
SDIO_DataInitStructure.SDIO_DataTimeOut=SD_DATATIMEOUT;
SDIO_DataInitStructure.SDIO_DPSM=SDIO_DPSM_Enable;
SDIO_DataInitStructure.SDIO_TransferDir=SDIO_TransferDir_ToCard;
SDIO_DataInitStructure.SDIO_TransferMode=SDIO_TransferMode_Block;
SDIO_DataConfig(&SDIO_DataInitStructure);
if(DeviceMode==SD_POLLING_MODE)
{
timeout=SDIO_DATATIMEOUT;
INTX_DISABLE();//关闭总中断(POLLING模式,严禁中断打断SDIO读写操作!!!)
while(!(SDIO->STA&((1<<4)|(1<<1)|(1<<8)|(1<<3)|(1<<9))))//下溢/CRC/数据结束/超时/起始位错误
{
if(SDIO_GetFlagStatus(SDIO_FLAG_TXFIFOHE)!= RESET) //发送区半空,表示至少存了8字(32字节)
{
if((tlen-bytestransferred)<SD_HALFFIFOBYTES)//不够32字节了
{
restwords=((tlen-bytestransferred)%4==0)?((tlen-bytestransferred)/4):((tlen-bytestransferred)/4+1);
for(count=0;count<restwords;count++,tempbuff++,bytestransferred+=4)
{
SDIO->FIFO=*tempbuff;
}
}else //发送区半空,可以发送至少8字(32字节)数据
{
for(count=0;count<SD_HALFFIFO;count++)
{
SDIO->FIFO=*(tempbuff+count);
}
tempbuff+=SD_HALFFIFO;
bytestransferred+=SD_HALFFIFOBYTES;
}
timeout=0X3FFFFFFF; //写数据溢出时间
}else
{
if(timeout==0)returnSD_DATA_TIMEOUT;
timeout--;
}
}
if(SDIO_GetFlagStatus(SDIO_FLAG_DTIMEOUT)!= RESET) //数据超时错误
{
SDIO_ClearFlag(SDIO_FLAG_DTIMEOUT); //清错误标志
returnSD_DATA_TIMEOUT;
}elseif(SDIO_GetFlagStatus(SDIO_FLAG_DCRCFAIL) != RESET) //数据块CRC错误
{
SDIO_ClearFlag(SDIO_FLAG_DCRCFAIL); //清错误标志
return SD_DATA_CRC_FAIL;
}elseif(SDIO_GetFlagStatus(SDIO_FLAG_TXUNDERR) != RESET) //接收fifo下溢错误
{
SDIO_ClearFlag(SDIO_FLAG_TXUNDERR); //清错误标志
returnSD_TX_UNDERRUN;
}elseif(SDIO_GetFlagStatus(SDIO_FLAG_STBITERR) != RESET) //接收起始位错误
{
SDIO_ClearFlag(SDIO_FLAG_STBITERR);//清错误标志
returnSD_START_BIT_ERR;
}
if(SDIO_GetFlagStatus(SDIO_FLAG_DATAEND)!= RESET) //发送结束
{
if((SDIO_STD_CAPACITY_SD_CARD_V1_1==CardType)||(SDIO_STD_CAPACITY_SD_CARD_V2_0==CardType)||(SDIO_HIGH_CAPACITY_SD_CARD==CardType))
{
SDIO_CmdInitStructure.SDIO_Argument=0;//发送CMD12+结束传输
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);//等待R1响应
if(errorstatus!=SD_OK)returnerrorstatus;
}
}
INTX_ENABLE();//开启总中断
SDIO_ClearFlag(SDIO_STATIC_FLAGS);//清除所有标记
}else if(DeviceMode==SD_DMA_MODE)
{
TransferError=SD_OK;
StopCondition=1; //多块写,需要发送停止传输指令
TransferEnd=0; //传输结束标置位，在中断服务置1
SDIO->MASK|=(1<<1)|(1<<3)|(1<<8)|(1<<4)|(1<<9); //配置产生数据接收完成中断
SD_DMA_Config((u32*)buf,nblks*blksize,DMA_DIR_MemoryToPeripheral); //SDIO DMA配置
SDIO->DCTRL|=1<<3; //SDIODMA使能.
timeout=SDIO_DATATIMEOUT;
while(((DMA2->LISR&(1<<27))==RESET)&&timeout)timeout--;//等待传输完成
if(timeout==0) //超时
{
SD_Init(); //重新初始化SD卡,可以解决写入死机的问题
returnSD_DATA_TIMEOUT; //超时
}
timeout=SDIO_DATATIMEOUT;
while((TransferEnd==0)&&(TransferError==SD_OK)&&timeout)timeout--;
if(timeout==0)returnSD_DATA_TIMEOUT; //超时
if(TransferError!=SD_OK)returnTransferError;
}
}
SDIO_ClearFlag(SDIO_STATIC_FLAGS);//清除所有标记
errorstatus=IsCardProgramming(&cardstate);
while((errorstatus==SD_OK)&&((cardstate==SD_CARD_PROGRAMMING)||(cardstate==SD_CARD_RECEIVING)))
{
errorstatus=IsCardProgramming(&cardstate);
}
return errorstatus;
}
//SDIO中断服务函数
voidSDIO_IRQHandler(void)
{
SD_ProcessIRQSrc();//处理所有SDIO相关中断
}
//SDIO中断处理函数
//处理SDIO传输过程中的各种中断事务
//返回值:错误代码
SD_ErrorSD_ProcessIRQSrc(void)
{
if(SDIO_GetFlagStatus(SDIO_FLAG_DATAEND)!= RESET)//接收完成中断
{
if (StopCondition==1)
{
SDIO_CmdInitStructure.SDIO_Argument=0;//发送CMD12+结束传输
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);
TransferError=CmdResp1Error(SD_CMD_STOP_TRANSMISSION);
}else TransferError = SD_OK;
SDIO->ICR|=1<<8;//清除完成中断标记
SDIO->MASK&=~((1<<1)|(1<<3)|(1<<8)|(1<<14)|(1<<15)|(1<<4)|(1<<5)|(1<<9));//关闭相关中断
TransferEnd= 1;
return(TransferError);
}
if(SDIO_GetFlagStatus(SDIO_FLAG_DCRCFAIL)!= RESET)//数据CRC错误
{
SDIO_ClearFlag(SDIO_FLAG_DCRCFAIL); //清错误标志
SDIO->MASK&=~((1<<1)|(1<<3)|(1<<8)|(1<<14)|(1<<15)|(1<<4)|(1<<5)|(1<<9));//关闭相关中断
TransferError = SD_DATA_CRC_FAIL;
return(SD_DATA_CRC_FAIL);
}
if(SDIO_GetFlagStatus(SDIO_FLAG_DTIMEOUT)!= RESET)//数据超时错误
{
SDIO_ClearFlag(SDIO_FLAG_DTIMEOUT); //清中断标志
SDIO->MASK&=~((1<<1)|(1<<3)|(1<<8)|(1<<14)|(1<<15)|(1<<4)|(1<<5)|(1<<9));//关闭相关中断
TransferError = SD_DATA_TIMEOUT;
return(SD_DATA_TIMEOUT);
}
if(SDIO_GetFlagStatus(SDIO_FLAG_RXOVERR)!= RESET)//FIFO上溢错误
{
SDIO_ClearFlag(SDIO_FLAG_RXOVERR); //清中断标志
SDIO->MASK&=~((1<<1)|(1<<3)|(1<<8)|(1<<14)|(1<<15)|(1<<4)|(1<<5)|(1<<9));//关闭相关中断
TransferError = SD_RX_OVERRUN;
return(SD_RX_OVERRUN);
}
if(SDIO_GetFlagStatus(SDIO_FLAG_TXUNDERR)!= RESET)//FIFO下溢错误
{
SDIO_ClearFlag(SDIO_FLAG_TXUNDERR); //清中断标志
SDIO->MASK&=~((1<<1)|(1<<3)|(1<<8)|(1<<14)|(1<<15)|(1<<4)|(1<<5)|(1<<9));//关闭相关中断
TransferError = SD_TX_UNDERRUN;
return(SD_TX_UNDERRUN);
}
if(SDIO_GetFlagStatus(SDIO_FLAG_STBITERR)!= RESET)//起始位错误
{
SDIO_ClearFlag(SDIO_FLAG_STBITERR); //清中断标志
SDIO->MASK&=~((1<<1)|(1<<3)|(1<<8)|(1<<14)|(1<<15)|(1<<4)|(1<<5)|(1<<9));//关闭相关中断
TransferError = SD_START_BIT_ERR;
return(SD_START_BIT_ERR);
}
return(SD_OK);
}
//检查CMD0的执行状态
//返回值:sd卡错误码
SD_ErrorCmdError(void)
{
SD_Error errorstatus = SD_OK;
u32 timeout=SDIO_CMD0TIMEOUT;
while(timeout--)
{
if(SDIO_GetFlagStatus(SDIO_FLAG_CMDSENT)!= RESET)break; //命令已发送(无需响应)
}
if(timeout==0)returnSD_CMD_RSP_TIMEOUT;
SDIO_ClearFlag(SDIO_STATIC_FLAGS);//清除所有标记
return errorstatus;
}
//检查R7响应的错误状态
//返回值:sd卡错误码
SD_ErrorCmdResp7Error(void)
{
SD_Error errorstatus=SD_OK;
u32 status;
u32 timeout=SDIO_CMD0TIMEOUT;
while(timeout--)
{
status=SDIO->STA;
if(status&((1<<0)|(1<<2)|(1<<6)))break;//CRC错误/命令响应超时/已经收到响应(CRC校验成功)
}
if((timeout==0)||(status&(1<<2))) //响应超时
{
errorstatus=SD_CMD_RSP_TIMEOUT; //当前卡不是2.0兼容卡,或者不支持设定的电压范围
SDIO_ClearFlag(SDIO_FLAG_CTIMEOUT); //清除命令响应超时标志
return errorstatus;
}
if(status&1<<6) //成功接收到响应
{
errorstatus=SD_OK;
SDIO_ClearFlag(SDIO_FLAG_CMDREND); //清除响应标志
}
return errorstatus;
}
//检查R1响应的错误状态
//cmd:当前命令
//返回值:sd卡错误码
SD_ErrorCmdResp1Error(u8 cmd)
{
u32status;
while(1)
{
status=SDIO->STA;
if(status&((1<<0)|(1<<2)|(1<<6)))break;//CRC错误/命令响应超时/已经收到响应(CRC校验成功)
}
if(SDIO_GetFlagStatus(SDIO_FLAG_CTIMEOUT)!= RESET) //响应超时
{
SDIO_ClearFlag(SDIO_FLAG_CTIMEOUT); //清除命令响应超时标志
return SD_CMD_RSP_TIMEOUT;
}
if(SDIO_GetFlagStatus(SDIO_FLAG_CCRCFAIL)!= RESET) //CRC错误
{
SDIO_ClearFlag(SDIO_FLAG_CCRCFAIL); //清除标志
return SD_CMD_CRC_FAIL;
}
if(SDIO->RESPCMD!=cmd)returnSD_ILLEGAL_CMD;//命令不匹配
SDIO_ClearFlag(SDIO_STATIC_FLAGS);//清除所有标记
return(SD_Error)(SDIO->RESP1&SD_OCR_ERRORBITS);//返回卡响应
}
//检查R3响应的错误状态
//返回值:错误状态
SD_ErrorCmdResp3Error(void)
{
u32 status;
while(1)
{
status=SDIO->STA;
if(status&((1<<0)|(1<<2)|(1<<6)))break;//CRC错误/命令响应超时/已经收到响应(CRC校验成功)
}
if(SDIO_GetFlagStatus(SDIO_FLAG_CTIMEOUT)!= RESET) //响应超时
{
SDIO_ClearFlag(SDIO_FLAG_CTIMEOUT); //清除命令响应超时标志
return SD_CMD_RSP_TIMEOUT;
}
SDIO_ClearFlag(SDIO_STATIC_FLAGS);//清除所有标记
returnSD_OK;
}
//检查R2响应的错误状态
//返回值:错误状态
SD_ErrorCmdResp2Error(void)
{
SD_Error errorstatus=SD_OK;
u32 status;
u32 timeout=SDIO_CMD0TIMEOUT;
while(timeout--)
{
status=SDIO->STA;
if(status&((1<<0)|(1<<2)|(1<<6)))break;//CRC错误/命令响应超时/已经收到响应(CRC校验成功)
}
if((timeout==0)||(status&(1<<2))) //响应超时
{
errorstatus=SD_CMD_RSP_TIMEOUT;
SDIO_ClearFlag(SDIO_FLAG_CTIMEOUT); //清除命令响应超时标志
return errorstatus;
}
if(SDIO_GetFlagStatus(SDIO_FLAG_CCRCFAIL)!= RESET) //CRC错误
{
errorstatus=SD_CMD_CRC_FAIL;
SDIO_ClearFlag(SDIO_FLAG_CCRCFAIL); //清除响应标志
}
SDIO_ClearFlag(SDIO_STATIC_FLAGS);//清除所有标记
returnerrorstatus;
}
//检查R6响应的错误状态
//cmd:之前发送的命令
//prca:卡返回的RCA地址
//返回值:错误状态
SD_ErrorCmdResp6Error(u8 cmd,u16*prca)
{
SD_Error errorstatus=SD_OK;
u32 status;
u32 rspr1;
while(1)
{
status=SDIO->STA;
if(status&((1<<0)|(1<<2)|(1<<6)))break;//CRC错误/命令响应超时/已经收到响应(CRC校验成功)
}
if(SDIO_GetFlagStatus(SDIO_FLAG_CTIMEOUT)!= RESET) //响应超时
{
SDIO_ClearFlag(SDIO_FLAG_CTIMEOUT); //清除命令响应超时标志
return SD_CMD_RSP_TIMEOUT;
}
if(SDIO_GetFlagStatus(SDIO_FLAG_CCRCFAIL)!= RESET) //CRC错误
{
SDIO_ClearFlag(SDIO_FLAG_CCRCFAIL); //清除响应标志
returnSD_CMD_CRC_FAIL;
}
if(SDIO->RESPCMD!=cmd) //判断是否响应cmd命令
{
returnSD_ILLEGAL_CMD;
}
SDIO_ClearFlag(SDIO_STATIC_FLAGS);//清除所有标记
rspr1=SDIO->RESP1; //得到响应
if(SD_ALLZERO==(rspr1&(SD_R6_GENERAL_UNKNOWN_ERROR|SD_R6_ILLEGAL_CMD|SD_R6_COM_CRC_FAILED)))
{
*prca=(u16)(rspr1>>16); //右移16位得到,rca
return errorstatus;
}
if(rspr1&SD_R6_GENERAL_UNKNOWN_ERROR)returnSD_GENERAL_UNKNOWN_ERROR;
if(rspr1&SD_R6_ILLEGAL_CMD)returnSD_ILLEGAL_CMD;
if(rspr1&SD_R6_COM_CRC_FAILED)returnSD_COM_CRC_FAILED;
return errorstatus;
}
//SDIO使能宽总线模式
//enx:0,不使能;1,使能;
//返回值:错误状态
SD_ErrorSDEnWideBus(u8 enx)
{
SD_Error errorstatus = SD_OK;
u32scr[2]={0,0};
u8 arg=0X00;
if(enx)arg=0X02;
else arg=0X00;
if(SDIO->RESP1&SD_CARD_LOCKED)returnSD_LOCK_UNLOCK_FAILED;//SD卡处于LOCKED状态
errorstatus=FindSCR(RCA,scr); //得到SCR寄存器数据
if(errorstatus!=SD_OK)returnerrorstatus;
if((scr[1]&SD_WIDE_BUS_SUPPORT)!=SD_ALLZERO) //支持宽总线
{
SDIO_CmdInitStructure.SDIO_Argument =(uint32_t) RCA << 16;//发送CMD55+RCA,短响应
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 = arg;//发送ACMD6,短响应,参数:10,4位;00,1位.
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);
return errorstatus;
}else return SD_REQUEST_NOT_APPLICABLE; //不支持宽总线设置
}
//检查卡是否正在执行写操作
//pstatus:当前状态.
//返回值:错误代码
SD_ErrorIsCardProgramming(u8 *pstatus)
{
vu32respR1 = 0, status = 0;
SDIO_CmdInitStructure.SDIO_Argument =(uint32_t) RCA << 16; //卡相对地址参数
SDIO_CmdInitStructure.SDIO_CmdIndex =SD_CMD_SEND_STATUS;//发送CMD13
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&((1<<0)|(1<<6)|(1<<2))))status=SDIO->STA;//等待操作完成
if(SDIO_GetFlagStatus(SDIO_FLAG_CCRCFAIL)!= RESET) //CRC检测失败
{
SDIO_ClearFlag(SDIO_FLAG_CCRCFAIL); //清除错误标记
return SD_CMD_CRC_FAIL;
}
if(SDIO_GetFlagStatus(SDIO_FLAG_CTIMEOUT)!= RESET) //命令超时
{
SDIO_ClearFlag(SDIO_FLAG_CTIMEOUT); //清除错误标记
return SD_CMD_RSP_TIMEOUT;
}
if(SDIO->RESPCMD!=SD_CMD_SEND_STATUS)returnSD_ILLEGAL_CMD;
SDIO_ClearFlag(SDIO_STATIC_FLAGS);//清除所有标记
respR1=SDIO->RESP1;
*pstatus=(u8)((respR1>>9)&0x0000000F);
return SD_OK;
}
//读取当前卡状态
//pcardstatus:卡状态
//返回值:错误代码
SD_ErrorSD_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;//发送CMD13,短响应
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); //查询响应状态
if(errorstatus!=SD_OK)returnerrorstatus;
*pcardstatus=SDIO->RESP1;//读取响应值
return errorstatus;
}
//返回SD卡的状态
//返回值:SD卡状态
SDCardStateSD_GetState(void)
{
u32 resp1=0;
if(SD_SendStatus(&resp1)!=SD_OK)returnSD_CARD_ERROR;
else return(SDCardState)((resp1>>9) & 0x0F);
}
//查找SD卡的SCR寄存器值
//rca:卡相对地址
//pscr:数据缓存区(存储SCR内容)
//返回值:错误状态
SD_ErrorFindSCR(u16 rca,u32 *pscr)
{
u32 index = 0;
SD_Error errorstatus = SD_OK;
u32 tempscr[2]={0,0};
SDIO_CmdInitStructure.SDIO_Argument =(uint32_t)8; //发送CMD16,短响应,设置Block Size为8字节
SDIO_CmdInitStructure.SDIO_CmdIndex =SD_CMD_SET_BLOCKLEN; // cmd16
SDIO_CmdInitStructure.SDIO_Response =SDIO_Response_Short; //r1
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)returnerrorstatus;
SDIO_CmdInitStructure.SDIO_Argument =(uint32_t) RCA << 16;
SDIO_CmdInitStructure.SDIO_CmdIndex =SD_CMD_APP_CMD;//发送CMD55,短响应
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)returnerrorstatus;
SDIO_DataInitStructure.SDIO_DataTimeOut =SD_DATATIMEOUT;
SDIO_DataInitStructure.SDIO_DataLength =8; //8个字节长度,block为8字节,SD卡到SDIO.
SDIO_DataInitStructure.SDIO_DataBlockSize =SDIO_DataBlockSize_8b ; //块大小8byte
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);
SDIO_CmdInitStructure.SDIO_Argument = 0x0;
SDIO_CmdInitStructure.SDIO_CmdIndex =SD_CMD_SD_APP_SEND_SCR; //发送ACMD51,短响应,参数为0
SDIO_CmdInitStructure.SDIO_Response =SDIO_Response_Short; //r1
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)returnerrorstatus;
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)//接收FIFO数据可用
{
*(tempscr+index)=SDIO->FIFO; //读取FIFO内容
index++;
if(index>=2)break;
}
}
if(SDIO_GetFlagStatus(SDIO_FLAG_DTIMEOUT)!= RESET) //数据超时错误
{
SDIO_ClearFlag(SDIO_FLAG_DTIMEOUT); //清错误标志
returnSD_DATA_TIMEOUT;
}elseif(SDIO_GetFlagStatus(SDIO_FLAG_DCRCFAIL) != RESET) //数据块CRC错误
{
SDIO_ClearFlag(SDIO_FLAG_DCRCFAIL); //清错误标志
returnSD_DATA_CRC_FAIL;
}elseif(SDIO_GetFlagStatus(SDIO_FLAG_RXOVERR) != RESET) //接收fifo上溢错误
{
SDIO_ClearFlag(SDIO_FLAG_RXOVERR); //清错误标志
returnSD_RX_OVERRUN;
}elseif(SDIO_GetFlagStatus(SDIO_FLAG_STBITERR) != RESET) //接收起始位错误
{
SDIO_ClearFlag(SDIO_FLAG_STBITERR);//清错误标志
returnSD_START_BIT_ERR;
}
SDIO_ClearFlag(SDIO_STATIC_FLAGS);//清除所有标记
//把数据顺序按8位为单位倒过来.
*(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);
returnerrorstatus;
}
//得到NumberOfBytes以2为底的指数.
//NumberOfBytes:字节数.
//返回值:以2为底的指数值
u8convert_from_bytes_to_power_of_two(u16 NumberOfBytes)
{
u8 count=0;
while(NumberOfBytes!=1)
{
NumberOfBytes>>=1;
count++;
}
return count;
}
//配置SDIODMA
//mbuf:存储器地址
//bufsize:传输数据量
//dir:方向;DMA_DIR_MemoryToPeripheral 存储器-->SDIO(写数据);DMA_DIR_PeripheralToMemorySDIO-->存储器(读数据);
voidSD_DMA_Config(u32*mbuf,u32 bufsize,u32 dir)
{
DMA_InitTypeDef DMA_InitStructure;
while (DMA_GetCmdStatus(DMA2_Stream3)!= DISABLE){}//等待DMA可配置
DMA_DeInit(DMA2_Stream3);//清空之前该stream3上的所有中断标志
DMA_InitStructure.DMA_Channel =DMA_Channel_4; //通道选择
DMA_InitStructure.DMA_PeripheralBaseAddr =(u32)&SDIO->FIFO;//DMA外设地址
DMA_InitStructure.DMA_Memory0BaseAddr =(u32)mbuf;//DMA 存储器0地址
DMA_InitStructure.DMA_DIR = dir;//存储器到外设模式
DMA_InitStructure.DMA_BufferSize = 0;//数据传输量
DMA_InitStructure.DMA_PeripheralInc =DMA_PeripheralInc_Disable;//外设非增量模式
DMA_InitStructure.DMA_MemoryInc =DMA_MemoryInc_Enable;//存储器增量模式
DMA_InitStructure.DMA_PeripheralDataSize =DMA_PeripheralDataSize_Word;//外设数据长度:32位
DMA_InitStructure.DMA_MemoryDataSize =DMA_MemoryDataSize_Word;//存储器数据长度:32位
DMA_InitStructure.DMA_Mode =DMA_Mode_Normal;// 使用普通模式
DMA_InitStructure.DMA_Priority =DMA_Priority_VeryHigh;//最高优先级
DMA_InitStructure.DMA_FIFOMode =DMA_FIFOMode_Enable; //FIFO使能
DMA_InitStructure.DMA_FIFOThreshold =DMA_FIFOThreshold_Full;//全FIFO
DMA_InitStructure.DMA_MemoryBurst =DMA_MemoryBurst_INC4;//外设突发4次传输
DMA_InitStructure.DMA_PeripheralBurst =DMA_PeripheralBurst_INC4;//存储器突发4次传输
DMA_Init(DMA2_Stream3,&DMA_InitStructure);//初始化DMA Stream
DMA_FlowControllerConfig(DMA2_Stream3,DMA_FlowCtrl_Peripheral);//外设流控制
DMA_Cmd(DMA2_Stream3 ,ENABLE);//开启DMA传输
}
//读SD卡
//buf:读数据缓存区
//sector:扇区地址
//cnt:扇区个数
//返回值:错误状态;0,正常;其他,错误代码;
u8SD_ReadDisk(u8*buf,u32 sector,u8 cnt)
{
u8 sta=SD_OK;
long long lsector=sector;
u8 n;
lsector<<=9;
if((u32)buf%4!=0)
{
for(n=0;n<cnt;n++)
{
sta=SD_ReadBlock(SDIO_DATA_BUFFER,lsector+512*n,512);//单个sector的读操作
memcpy(buf,SDIO_DATA_BUFFER,512);
buf+=512;
}
}else
{
if(cnt==1)sta=SD_ReadBlock(buf,lsector,512); //单个sector的读操作
elsesta=SD_ReadMultiBlocks(buf,lsector,512,cnt);//多个sector
}
return sta;
}
//写SD卡
//buf:写数据缓存区
//sector:扇区地址
//cnt:扇区个数
//返回值:错误状态;0,正常;其他,错误代码;
u8SD_WriteDisk(u8*buf,u32 sector,u8 cnt)
{
u8 sta=SD_OK;
u8 n;
long long lsector=sector;
lsector<<=9;
if((u32)buf%4!=0)
{
for(n=0;n<cnt;n++)
{
memcpy(SDIO_DATA_BUFFER,buf,512);
sta=SD_WriteBlock(SDIO_DATA_BUFFER,lsector+512*n,512);//单个sector的写操作
buf+=512;
}
}else
{
if(cnt==1)sta=SD_WriteBlock(buf,lsector,512); //单个sector的写操作
elsesta=SD_WriteMultiBlocks(buf,lsector,512,cnt); //多个sector
}
return sta;
}