/**
* @brief Reads multiple block of data from the SD.
* @param pBuffer: pointer to the buffer that receives the data read from the
* SD.
* @param ReadAddr: SD's internal address to read from.
* @param BlockSize: the SD card Data block size.
* @param NumberOfBlocks: number of blocks to be read.
* @retval The SD Response:
* - SD_RESPONSE_FAILURE: Sequence failed
* - SD_RESPONSE_NO_ERROR: Sequence succeed
*/
SD_Error SD_ReadMultiBlocks(uint8_t* pBuffer, uint32_t ReadAddr, uint16_t BlockSize, uint32_t NumberOfBlocks)
{
uint32_t i = 0, Offset = 0;
SD_Error rvalue = SD_RESPONSE_FAILURE;
/*!< SD chip select low */
SD_CS_LOW();
/*!< Data transfer */
while (NumberOfBlocks--)
{
if(flag_SDHC == 1)
{
/*!< Send CMD17 (SD_CMD_READ_SINGLE_BLOCK) to read one block */
SD_SendCmd (SD_CMD_READ_SINGLE_BLOCK,(ReadAddr + Offset)/512, 0xFF);
}
else
{
/*!< Send CMD17 (SD_CMD_READ_SINGLE_BLOCK) to read one block */
SD_SendCmd (SD_CMD_READ_SINGLE_BLOCK, ReadAddr + Offset, 0xFF);
}
/*!< Check if the SD acknowledged the read block command: R1 response (0x00: no errors) */
if (SD_GetResponse(SD_RESPONSE_NO_ERROR))
{
return SD_RESPONSE_FAILURE;
}
/*!< Now look for the data token to signify the start of the data */
if (!SD_GetResponse(SD_START_DATA_SINGLE_BLOCK_READ))
{
/*!< Read the SD block data : read NumByteToRead data */
for (i = 0; i < BlockSize; i++)
{
/*!< Read the pointed data */
*pBuffer = SD_ReadByte();
/*!< Point to the next location where the byte read will be saved */
pBuffer++;
}
/*!< Set next read address*/
Offset += 512;
/*!< get CRC bytes (not really needed by us, but required by SD) */
SD_ReadByte();
SD_ReadByte();
/*!< Set response value to success */
rvalue = SD_RESPONSE_NO_ERROR;
}
else
{
/*!< Set response value to failure */
rvalue = SD_RESPONSE_FAILURE;
}
}
/*!< SD chip select high */
SD_CS_HIGH();
/*!< Send dummy byte: 8 Clock pulses of delay */
SD_WriteByte(SD_DUMMY_BYTE);
/*!< Returns the reponse */
return rvalue;
}
/**
* @brief Write a buffer (many blocks) in the SD card.
* @note The amount of data to write should be a multiple of SD card BLOCK
* size (512 Byte).
* @param pBuffer : pointer to the buffer containing the data to be written on the SD.
* @param WriteAddr : address to write on.
* @param NumByteToWrite : number of data to write.
* @retval SD Response:
* - SD_RESPONSE_FAILURE: Sequence failed.
* - SD_RESPONSE_NO_ERROR: Sequence succeed.
*/
uint8_t SD_WriteBuffer(uint8_t *pBuffer, uint32_t WriteAddr, uint32_t NumByteToWrite)
{
uint32_t i = 0, NbrOfBlock = 0, Offset = 0;
uint8_t rvalue = SD_RESPONSE_FAILURE;
/* Calculate number of blocks to write */
NbrOfBlock = NumByteToWrite / SD_BLOCK_SIZE;
/* SD chip select low */
SD_CS_LOW();
/* Data transfer */
while (NbrOfBlock--)
{
/* Send CMD24 (SD_WRITE_BLOCK) to write blocks */
SD_SendCmd(SD_CMD_WRITE_SINGLE_BLOCK, WriteAddr + Offset, 0xFF);
/* Check if the SD acknowledged the write block command: R1 response (0x00: no errors) */
if (SD_GetResponse(SD_RESPONSE_NO_ERROR))
{
return SD_RESPONSE_FAILURE;
}
/* Send dummy byte */
SD_WriteByte(SD_DUMMY_BYTE);
/* Send the data token to signify the start of the data */
SD_WriteByte(SD_START_DATA_SINGLE_BLOCK_WRITE);
/* Write the block data to SD : write count data by block */
for (i = 0; i < SD_BLOCK_SIZE; i++)
{
/* Send the pointed byte */
SD_WriteByte(*pBuffer);
/* Point to the next location where the byte read will be saved */
pBuffer++;
}
/* Set next write address */
Offset += 512;
/* Put CRC bytes (not really needed by us, but required by SD) */
SD_ReadByte();
SD_ReadByte();
/* Read data response */
if (SD_GetDataResponse() == SD_DATA_OK)
{
/* Set response value to success */
rvalue = SD_RESPONSE_NO_ERROR;
}
else
{
/* Set response value to failure */
rvalue = SD_RESPONSE_FAILURE;
}
}
/* SD chip select high */
SD_CS_HIGH();
/* Send dummy byte: 8 Clock pulses of delay */
SD_WriteByte(SD_DUMMY_BYTE);
/* Returns the response */
return rvalue;
}
/**
* @brief Writes a block on the SD
* @param pBuffer: pointer to the buffer containing the data to be written on
* the SD.
* @param WriteAddr: address to write on.
* @param BlockSize: the SD card Data block size.
* @retval The SD Response:
* - SD_RESPONSE_FAILURE: Sequence failed
* - SD_RESPONSE_NO_ERROR: Sequence succeed
*/
uint8_t SD_WriteBlock(uint8_t* pBuffer, uint32_t WriteAddr, uint16_t BlockSize)
{
uint32_t i = 0;
uint8_t rvalue = SD_RESPONSE_FAILURE;
/*!< SD chip select low */
SD_CS_LOW();
/*!< Send CMD24 (SD_CMD_WRITE_SINGLE_BLOCK) to write multiple block */
SD_SendCmd(SD_CMD_WRITE_SINGLE_BLOCK, WriteAddr, 0xFF);
/*!< Check if the SD acknowledged the write block command: R1 response (0x00: no errors) */
if (!SD_GetResponse(SD_RESPONSE_NO_ERROR))
{
/*!< Send a dummy byte */
SD_WriteByte(SD_DUMMY_BYTE);
/*!< Send the data token to signify the start of the data */
SD_WriteByte(0xFE);
/*!< Write the block data to SD : write count data by block */
for (i = 0; i < BlockSize; i++)
{
/*!< Send the pointed byte */
SD_WriteByte(*pBuffer);
/*!< Point to the next location where the byte read will be saved */
pBuffer++;
}
/* Send DUMMY bytes when the number of data to be written are lower
than the SD card BLOCK size (512 Byte) */
for (; i != SD_BLOCK_SIZE; i++)
{
/* Send the pointed byte */
SD_WriteByte(SD_DUMMY_BYTE);
}
/*!< Put CRC bytes (not really needed by us, but required by SD) */
SD_ReadByte();
SD_ReadByte();
/*!< Read data response */
if (SD_GetDataResponse() == SD_DATA_OK)
{
rvalue = SD_RESPONSE_NO_ERROR;
}
}
/*!< SD chip select high */
SD_CS_HIGH();
/*!< Send dummy byte: 8 Clock pulses of delay */
SD_WriteByte(SD_DUMMY_BYTE);
/*!< Returns the response */
return rvalue;
}
/**
* @brief Reads a block of data from the SD.
* @param pBuffer: pointer to the buffer that receives the data read from the
* SD.
* @param ReadAddr: SD's internal address to read from.
* @param BlockSize: the SD card Data block size.
* @retval The SD Response:
* - SD_RESPONSE_FAILURE: Sequence failed
* - SD_RESPONSE_NO_ERROR: Sequence succeed
*/
uint8_t SD_ReadBlock(uint8_t* pBuffer, uint32_t ReadAddr, uint16_t BlockSize)
{
uint32_t i = 0;
uint8_t rvalue = SD_RESPONSE_FAILURE;
/*!< SD chip select low */
SD_CS_LOW();
/*!< Send CMD17 (SD_CMD_READ_SINGLE_BLOCK) to read one block */
SD_SendCmd(SD_CMD_READ_SINGLE_BLOCK, ReadAddr, 0xFF);
/*!< Check if the SD acknowledged the read block command: R1 response (0x00: no errors) */
if (!SD_GetResponse(SD_RESPONSE_NO_ERROR))
{
/*!< Now look for the data token to signify the start of the data */
if (!SD_GetResponse(SD_START_DATA_SINGLE_BLOCK_READ))
{
/*!< Read the SD block data : read NumByteToRead data */
for (i = 0; i < BlockSize; i++)
{
/*!< Save the received data */
*pBuffer = SD_ReadByte();
/*!< Point to the next location where the byte read will be saved */
pBuffer++;
}
/*!< Get CRC bytes (not really needed by us, but required by SD) */
SD_ReadByte();
SD_ReadByte();
/*!< Set response value to success */
rvalue = SD_RESPONSE_NO_ERROR;
}
}
/*!< SD chip select high */
SD_CS_HIGH();
/*!< Send dummy byte: 8 Clock pulses of delay */
SD_WriteByte(SD_DUMMY_BYTE);
/*!< Returns the response */
return rvalue;
}
/**
* @brief Put SD in Idle state.
* @param None
* @retval The SD Response:
* - SD_RESPONSE_FAILURE: Sequence failed
* - SD_RESPONSE_NO_ERROR: Sequence succeed
*/
SD_Error SD_GoIdleState(void)
{
/*!< SD chip select low */
SD_CS_LOW();
/*!< Send CMD0 (SD_CMD_GO_IDLE_STATE) to put SD in SPI mode */
SD_SendCmd(SD_CMD_GO_IDLE_STATE, 0, 0x95);
/*!< Wait for In Idle State Response (R1 Format) equal to 0x01 */
if (SD_GetResponse(SD_IN_IDLE_STATE))
{
/*!< No Idle State Response: return response failue */
return SD_RESPONSE_FAILURE;
}
/*----------Activates the card initialization process-----------*/
do
{
/*!< SD chip select high */
SD_CS_HIGH();
/*!< Send Dummy byte 0xFF */
SD_WriteByte(SD_DUMMY_BYTE);
/*!< SD chip select low */
SD_CS_LOW();
/*!< Send CMD1 (Activates the card process) until response equal to 0x0 */
SD_SendCmd(SD_CMD_SEND_OP_COND, 0, 0xFF);
/*!< Wait for no error Response (R1 Format) equal to 0x00 */
}
while (SD_GetResponse(SD_RESPONSE_NO_ERROR));
/*!< SD chip select high */
SD_CS_HIGH();
/*!< Send dummy byte 0xFF */
SD_WriteByte(SD_DUMMY_BYTE);
return SD_RESPONSE_NO_ERROR;
}
/**
* @name SD_RecvData
* @description 从sd卡读取一定长度的内容，保存到缓冲区buf中
* @param buf 数据缓存区
len 要读取的数据长度
* @return 1 读取成功
0 读取失败
* @notice
*/
u8 SD_RecvData(u8 *buf,u16 len)
{
//等待SD卡发回数据起始令牌
if(SD_GetResponse(SD_BEGIN_END_FLAG) != SD_RESPONSE_NO_ERROR)
return 0;
//开始接收数据
while(len--)
{
*buf = SD_SPI_ReadWriteByte(SD_DUMMY_BYTE);
buf++;
}
//下面是2个伪CRC（dummy CRC）
SD_SPI_ReadWriteByte(0xFF);
SD_SPI_ReadWriteByte(0xFF);
return 1;//读取成功
}
//在指定扇区,从offset开始读出bytes个字节
//输入:u32 sector 扇区地址（sector值，非物理地址）
// u8 *buf 数据存储地址（大小<=512byte）
// u16 offset 在扇区里面的偏移量
// u16 bytes 要读出的字节数
//返回值:0： 成功
// other：失败
u8 SD_Read_Bytes(unsigned long address,unsigned char *buf,unsigned int offset,unsigned int bytes)
{
u8 r1;
u16 i=0;
r1=SD_SendCommand(CMD17,address<<9,0);//发送读扇区命令
if(r1)return r1; //应答不正确，直接返回
SD_CS=0;//选中SD卡
if(SD_GetResponse(0xFE))//等待SD卡发回数据起始令牌0xFE
{
SD_CS=1; //关闭SD卡
return 1;//读取失败
}
for(i=0; i<offset; i++)SPIx_ReadWriteByte(0xff); //跳过offset位
for(; i<offset+bytes; i++)*buf++=SPIx_ReadWriteByte(0xff); //读取有用数据
for(; i<512; i++) SPIx_ReadWriteByte(0xff); //读出剩余字节
SPIx_ReadWriteByte(0xff);//发送伪CRC码
SPIx_ReadWriteByte(0xff);
SD_CS=1;//关闭SD卡
return 0;
}
//从SD卡中读回指定长度的数据，放置在给定位置
//输入: u8 *data(存放读回数据的内存>len)
// u16 len(数据长度）
// u8 release(传输完成后是否释放总线CS置高 0：不释放 1：释放）
//返回值:0：NO_ERR
// other：错误信息
u8 SD_ReceiveData(u8 *data, u16 len, u8 release)
{
// 启动一次传输
SD_CS=0;
if(SD_GetResponse(0xFE))//等待SD卡发回数据起始令牌0xFE
{
SD_CS=1;
return 1;
}
while(len--)//开始接收数据
{
*data=SPIx_ReadWriteByte(0xFF);
data++;
}
//下面是2个伪CRC（dummy CRC）
SPIx_ReadWriteByte(0xFF);
SPIx_ReadWriteByte(0xFF);
if(release==RELEASE)//按需释放总线，将CS置高
{
SD_CS=1;//传输结束
SPIx_ReadWriteByte(0xFF);
}
return 0;
}
/**
* @brief Read the CID card register.
* Reading the contents of the CID register in SPI mode is a simple
* read-block transaction.
* @param SD_cid: pointer on an CID register structure
* @retval The SD Response:
* - SD_RESPONSE_FAILURE: Sequence failed
* - SD_RESPONSE_NO_ERROR: Sequence succeed
*/
SD_Error SD_GetCIDRegister(SD_CID* SD_cid)
{
uint32_t i = 0;
SD_Error rvalue = SD_RESPONSE_FAILURE;
uint8_t CID_Tab[16];
/*!< SD chip select low */
SD_CS_LOW();
/*!< Send CMD10 (CID register) */
SD_SendCmd(SD_CMD_SEND_CID, 0, 0xFF);
/*!< Wait for response in the R1 format (0x00 is no errors) */
if (!SD_GetResponse(SD_RESPONSE_NO_ERROR))
{
if (!SD_GetResponse(SD_START_DATA_SINGLE_BLOCK_READ))
{
/*!< Store CID register value on CID_Tab */
for (i = 0; i < 16; i++)
{
CID_Tab[i] = SD_ReadByte();
}
}
/*!< Get CRC bytes (not really needed by us, but required by SD) */
SD_WriteByte(SD_DUMMY_BYTE);
SD_WriteByte(SD_DUMMY_BYTE);
/*!< Set response value to success */
rvalue = SD_RESPONSE_NO_ERROR;
}
/*!< SD chip select high */
SD_CS_HIGH();
/*!< Send dummy byte: 8 Clock pulses of delay */
SD_WriteByte(SD_DUMMY_BYTE);
/*!< Byte 0 */
SD_cid->ManufacturerID = CID_Tab[0];
/*!< Byte 1 */
SD_cid->OEM_AppliID = CID_Tab[1] << 8;
/*!< Byte 2 */
SD_cid->OEM_AppliID |= CID_Tab[2];
/*!< Byte 3 */
SD_cid->ProdName1 = CID_Tab[3] << 24;
/*!< Byte 4 */
SD_cid->ProdName1 |= CID_Tab[4] << 16;
/*!< Byte 5 */
SD_cid->ProdName1 |= CID_Tab[5] << 8;
/*!< Byte 6 */
SD_cid->ProdName1 |= CID_Tab[6];
/*!< Byte 7 */
SD_cid->ProdName2 = CID_Tab[7];
/*!< Byte 8 */
SD_cid->ProdRev = CID_Tab[8];
/*!< Byte 9 */
SD_cid->ProdSN = CID_Tab[9] << 24;
/*!< Byte 10 */
SD_cid->ProdSN |= CID_Tab[10] << 16;
/*!< Byte 11 */
SD_cid->ProdSN |= CID_Tab[11] << 8;
/*!< Byte 12 */
SD_cid->ProdSN |= CID_Tab[12];
/*!< Byte 13 */
SD_cid->Reserved1 |= (CID_Tab[13] & 0xF0) >> 4;
SD_cid->ManufactDate = (CID_Tab[13] & 0x0F) << 8;
/*!< Byte 14 */
SD_cid->ManufactDate |= CID_Tab[14];
/*!< Byte 15 */
SD_cid->CID_CRC = (CID_Tab[15] & 0xFE) >> 1;
SD_cid->Reserved2 = 1;
/*!< Return the reponse */
return rvalue;
}
/**
* @brief Read the CSD card register.
* Reading the contents of the CSD register in SPI mode is a simple
* read-block transaction.
* @param SD_csd: pointer on an SCD register structure
* @retval The SD Response:
* - SD_RESPONSE_FAILURE: Sequence failed
* - SD_RESPONSE_NO_ERROR: Sequence succeed
*/
SD_Error SD_GetCSDRegister(SD_CSD* SD_csd)
{
uint32_t i = 0;
SD_Error rvalue = SD_RESPONSE_FAILURE;
uint8_t CSD_Tab[16];
/*!< SD chip select low */
SD_CS_LOW();
/*!< Send CMD9 (CSD register) or CMD10(CSD register) */
SD_SendCmd(SD_CMD_SEND_CSD, 0, 0xFF);
/*!< Wait for response in the R1 format (0x00 is no errors) */
if (!SD_GetResponse(SD_RESPONSE_NO_ERROR))
{
if (!SD_GetResponse(SD_START_DATA_SINGLE_BLOCK_READ))
{
for (i = 0; i < 16; i++)
{
/*!< Store CSD register value on CSD_Tab */
CSD_Tab[i] = SD_ReadByte();
}
}
/*!< Get CRC bytes (not really needed by us, but required by SD) */
SD_WriteByte(SD_DUMMY_BYTE);
SD_WriteByte(SD_DUMMY_BYTE);
/*!< Set response value to success */
rvalue = SD_RESPONSE_NO_ERROR;
}
/*!< SD chip select high */
SD_CS_HIGH();
/*!< Send dummy byte: 8 Clock pulses of delay */
SD_WriteByte(SD_DUMMY_BYTE);
/*!< Byte 0 */
SD_csd->CSDStruct = (CSD_Tab[0] & 0xC0) >> 6;
SD_csd->SysSpecVersion = (CSD_Tab[0] & 0x3C) >> 2;
SD_csd->Reserved1 = CSD_Tab[0] & 0x03;
/*!< Byte 1 */
SD_csd->TAAC = CSD_Tab[1];
/*!< Byte 2 */
SD_csd->NSAC = CSD_Tab[2];
/*!< Byte 3 */
SD_csd->MaxBusClkFrec = CSD_Tab[3];
/*!< Byte 4 */
SD_csd->CardComdClasses = CSD_Tab[4] << 4;
/*!< Byte 5 */
SD_csd->CardComdClasses |= (CSD_Tab[5] & 0xF0) >> 4;
SD_csd->RdBlockLen = CSD_Tab[5] & 0x0F;
/*!< Byte 6 */
SD_csd->PartBlockRead = (CSD_Tab[6] & 0x80) >> 7;
SD_csd->WrBlockMisalign = (CSD_Tab[6] & 0x40) >> 6;
SD_csd->RdBlockMisalign = (CSD_Tab[6] & 0x20) >> 5;
SD_csd->DSRImpl = (CSD_Tab[6] & 0x10) >> 4;
SD_csd->Reserved2 = 0; /*!< Reserved */
SD_csd->DeviceSize = (CSD_Tab[6] & 0x03) << 10;
/*!< Byte 7 */
SD_csd->DeviceSize |= (CSD_Tab[7]) << 2;
/*!< Byte 8 */
SD_csd->DeviceSize |= (CSD_Tab[8] & 0xC0) >> 6;
SD_csd->MaxRdCurrentVDDMin = (CSD_Tab[8] & 0x38) >> 3;
SD_csd->MaxRdCurrentVDDMax = (CSD_Tab[8] & 0x07);
/*!< Byte 9 */
SD_csd->MaxWrCurrentVDDMin = (CSD_Tab[9] & 0xE0) >> 5;
SD_csd->MaxWrCurrentVDDMax = (CSD_Tab[9] & 0x1C) >> 2;
SD_csd->DeviceSizeMul = (CSD_Tab[9] & 0x03) << 1;
/*!< Byte 10 */
SD_csd->DeviceSizeMul |= (CSD_Tab[10] & 0x80) >> 7;
SD_csd->EraseGrSize = (CSD_Tab[10] & 0x40) >> 6;
SD_csd->EraseGrMul = (CSD_Tab[10] & 0x3F) << 1;
/*!< Byte 11 */
SD_csd->EraseGrMul |= (CSD_Tab[11] & 0x80) >> 7;
SD_csd->WrProtectGrSize = (CSD_Tab[11] & 0x7F);
/*!< Byte 12 */
SD_csd->WrProtectGrEnable = (CSD_Tab[12] & 0x80) >> 7;
SD_csd->ManDeflECC = (CSD_Tab[12] & 0x60) >> 5;
SD_csd->WrSpeedFact = (CSD_Tab[12] & 0x1C) >> 2;
SD_csd->MaxWrBlockLen = (CSD_Tab[12] & 0x03) << 2;
/*!< Byte 13 */
SD_csd->MaxWrBlockLen |= (CSD_Tab[13] & 0xC0) >> 6;
SD_csd->WriteBlockPaPartial = (CSD_Tab[13] & 0x20) >> 5;
SD_csd->Reserved3 = 0;
SD_csd->ContentProtectAppli = (CSD_Tab[13] & 0x01);
/*!< Byte 14 */
SD_csd->FileFormatGrouop = (CSD_Tab[14] & 0x80) >> 7;
SD_csd->CopyFlag = (CSD_Tab[14] & 0x40) >> 6;
SD_csd->PermWrProtect = (CSD_Tab[14] & 0x20) >> 5;
SD_csd->TempWrProtect = (CSD_Tab[14] & 0x10) >> 4;
SD_csd->FileFormat = (CSD_Tab[14] & 0x0C) >> 2;
SD_csd->ECC = (CSD_Tab[14] & 0x03);
/*!< Byte 15 */
SD_csd->CSD_CRC = (CSD_Tab[15] & 0xFE) >> 1;
SD_csd->Reserved4 = 1;
/*!< Return the reponse */
return rvalue;
}
/**
* @brief Read the CSD card register.
* Reading the contents of the CSD register in SPI mode is a simple
* read-block transaction.
* @param SD_csd: pointer on an SCD register structure
* @retval The SD Response:
* - SD_RESPONSE_FAILURE: Sequence failed
* - SD_RESPONSE_NO_ERROR: Sequence succeed
*/
SD_Error SD_GetCSDRegister(SD_CSD* SD_csd)
{
uint32_t i = 0;
SD_Error rvalue = SD_RESPONSE_FAILURE;
uint8_t CSD_Tab[16];
uint32_t CardCapacity;
static uint32_t times = 0;
/*!< SD chip select low */
SD_CS_LOW();
/*!< Send CMD9 (CSD register) or CMD10(CSD register) */
SD_SendCmd(SD_CMD_SEND_CSD, 0, 0xFF);
/*!< Wait for response in the R1 format (0x00 is no errors) */
if (!SD_GetResponse(SD_RESPONSE_NO_ERROR))
{
if (!SD_GetResponse(SD_START_DATA_SINGLE_BLOCK_READ))
{
for (i = 0; i < 16; i++)
{
/*!< Store CSD register value on CSD_Tab */
CSD_Tab[i] = SD_ReadByte();
//if(0 == times)
//{
// printf("\n\r CSD_Tab[%d] 0x%X", i, CSD_Tab[i]);
//}
}
}
/*!< Get CRC bytes (not really needed by us, but required by SD) */
SD_WriteByte(SD_DUMMY_BYTE);
SD_WriteByte(SD_DUMMY_BYTE);
/*!< Set response value to success */
rvalue = SD_RESPONSE_NO_ERROR;
}
else
{
return rvalue;
}
/*!< SD chip select high */
SD_CS_HIGH();
/*!< Send dummy byte: 8 Clock pulses of delay */
SD_WriteByte(SD_DUMMY_BYTE);
/*!< Byte 0 */
SD_csd->CSDStruct = (CSD_Tab[0] & 0xC0) >> 6;
SD_csd->SysSpecVersion = (CSD_Tab[0] & 0x3C) >> 2;
SD_csd->Reserved1 = CSD_Tab[0] & 0x03;
if(0 == times)
{
if(SD_csd->CSDStruct == 1)
{
//printf("\n\r SDHC CSD Version 2.0 Acess AS SD High Capacity.");
flag_SDHC = 1;
}
else
{
//printf("\n\r SDSC CSD Version 1.0 Acess AS SD Standard Capacity.");
flag_SDHC = 0;
}
}
/*!< Byte 1 */
SD_csd->TAAC = CSD_Tab[1];
/*!< Byte 2 */
SD_csd->NSAC = CSD_Tab[2];
/*!< Byte 3 */
SD_csd->MaxBusClkFrec = CSD_Tab[3];
/*!< Byte 4 */
SD_csd->CardComdClasses = CSD_Tab[4] << 4;
/*!< Byte 5 */
SD_csd->CardComdClasses |= (CSD_Tab[5] & 0xF0) >> 4;
SD_csd->RdBlockLen = CSD_Tab[5] & 0x0F;
/*!< Byte 6 */
SD_csd->PartBlockRead = (CSD_Tab[6] & 0x80) >> 7;
SD_csd->WrBlockMisalign = (CSD_Tab[6] & 0x40) >> 6;
SD_csd->RdBlockMisalign = (CSD_Tab[6] & 0x20) >> 5;
SD_csd->DSRImpl = (CSD_Tab[6] & 0x10) >> 4;
SD_csd->Reserved2 = 0; /*!< Reserved */
if(flag_SDHC == 0)
{
SD_csd->DeviceSize = (CSD_Tab[6] & 0x03) << 10;
/*!< Byte 7 */
SD_csd->DeviceSize |= (CSD_Tab[7]) << 2;
/*!< Byte 8 */
SD_csd->DeviceSize |= (CSD_Tab[8] & 0xC0) >> 6;
}
