/**
* @brief Reads block(s) from a specified address in the SD card, in polling mode.
* @param pData: Pointer to the buffer that will contain the data to transmit
* @param ReadAddr: Address from where data is to be read
* @param BlockSize: SD card data block size, that should be 512
* @param NumOfBlocks: Number of SD blocks to read
* @retval SD status
*/
uint8_t BSP_SD_ReadBlocks(uint32_t* pData, uint32_t ReadAddr, uint16_t BlockSize, uint32_t NumberOfBlocks)
{
uint32_t counter = 0, offset = 0;
uint8_t rvalue = MSD_ERROR;
uint8_t *ptr = (uint8_t*) pData;
/* Send CMD16 (SD_CMD_SET_BLOCKLEN) to set the size of the block and
Check if the SD acknowledged the set block length command: R1 response (0x00: no errors) */
if (SD_IO_WriteCmd(SD_CMD_SET_BLOCKLEN, BlockSize, 0xFF, SD_RESPONSE_NO_ERROR) != 0)
{
return MSD_ERROR;
}
/* Data transfer */
while (NumberOfBlocks--)
{
/* Send dummy byte: 8 Clock pulses of delay */
SD_IO_WriteDummy();
/* Send CMD17 (SD_CMD_READ_SINGLE_BLOCK) to read one block */
/* Check if the SD acknowledged the read block command: R1 response (0x00: no errors) */
if (SD_IO_WriteCmd(SD_CMD_READ_SINGLE_BLOCK, ReadAddr + offset, 0xFF, SD_RESPONSE_NO_ERROR) != 0)
{
return MSD_ERROR;
}
/* Now look for the data token to signify the start of the data */
if (!SD_IO_WaitResponse(SD_START_DATA_SINGLE_BLOCK_READ))
{
/* Read the SD block data : read NumByteToRead data */
for (counter = 0; counter < BlockSize; counter++)
{
/* Read the pointed data */
*ptr = SD_IO_ReadByte();
/* Point to the next location where the byte read will be saved */
ptr++;
}
/* Set next read address*/
offset += BlockSize;
/* get CRC bytes (not really needed by us, but required by SD) */
SD_IO_ReadByte();
SD_IO_ReadByte();
/* Set response value to success */
rvalue = MSD_OK;
}
else
{
/* Set response value to failure */
rvalue = MSD_ERROR;
}
}
/* Send dummy byte: 8 Clock pulses of delay */
SD_IO_WriteDummy();
/* Return the reponse */
return rvalue;
}
/**
* @brief Writes block(s) to a specified address in an SD card, in polling mode.
* @param pData: Pointer to the buffer that will contain the data to transmit
* @param WriteAddr: Address from where data is to be written
* @param BlockSize: SD card data block size, that should be 512
* @param NumOfBlocks: Number of SD blocks to write
* @retval SD status
*/
uint8_t BSP_SD_WriteBlocks(uint32_t* p32Data, uint64_t WriteAddr, uint16_t BlockSize, uint32_t NumberOfBlocks)
{
uint32_t counter = 0, offset = 0;
uint8_t rvalue = MSD_ERROR;
uint8_t *pData = (uint8_t *)p32Data;
/* Data transfer */
while (NumberOfBlocks--)
{
/* Send CMD24 (SD_CMD_WRITE_SINGLE_BLOCK) to write blocks and
Check if the SD acknowledged the write block command: R1 response (0x00: no errors) */
if (SD_IO_WriteCmd(SD_CMD_WRITE_SINGLE_BLOCK, WriteAddr + offset, 0xFF, SD_RESPONSE_NO_ERROR) != HAL_OK)
{
return MSD_ERROR;
}
/* Send dummy byte */
SD_IO_WriteByte(SD_DUMMY_BYTE);
/* Send the data token to signify the start of the data */
SD_IO_WriteByte(SD_START_DATA_SINGLE_BLOCK_WRITE);
/* Write the block data to SD : write count data by block */
for (counter = 0; counter < BlockSize; counter++)
{
/* Send the pointed byte */
SD_IO_WriteByte(*pData);
/* Point to the next location where the byte read will be saved */
pData++;
}
/* Set next write address */
offset += BlockSize;
/* Put CRC bytes (not really needed by us, but required by SD) */
SD_IO_ReadByte();
SD_IO_ReadByte();
/* Read data response */
if (SD_GetDataResponse() == SD_DATA_OK)
{
/* Set response value to success */
rvalue = MSD_OK;
}
else
{
/* Set response value to failure */
rvalue = MSD_ERROR;
}
}
/* Send dummy byte: 8 Clock pulses of delay */
SD_IO_WriteDummy();
/* Returns 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 Csd: pointer on an SCD register structure
* @retval SD status
*/
uint8_t SD_GetCSDRegister(SD_CSD* Csd)
{
uint32_t counter = 0;
uint8_t rvalue = MSD_ERROR;
uint8_t CSD_Tab[16];
/* Send CMD9 (CSD register) or CMD10(CSD register) and Wait for response in the R1 format (0x00 is no errors) */
if (SD_IO_WriteCmd(SD_CMD_SEND_CSD, 0, 0xFF, SD_RESPONSE_NO_ERROR) == HAL_OK)
{
if (SD_IO_WaitResponse(SD_START_DATA_SINGLE_BLOCK_READ) == HAL_OK)
{
for (counter = 0; counter < 16; counter++)
{
/* Store CSD register value on CSD_Tab */
CSD_Tab[counter] = SD_IO_ReadByte();
}
/* Get CRC bytes (not really needed by us, but required by SD) */
SD_IO_WriteByte(SD_DUMMY_BYTE);
SD_IO_WriteByte(SD_DUMMY_BYTE);
/* Set response value to success */
rvalue = MSD_OK;
}
}
/* Send dummy byte: 8 Clock pulses of delay */
SD_IO_WriteDummy();
if(rvalue == SD_RESPONSE_NO_ERROR)
{
/* Byte 0 */
Csd->CSDStruct = (CSD_Tab[0] & 0xC0) >> 6;
Csd->SysSpecVersion = (CSD_Tab[0] & 0x3C) >> 2;
Csd->Reserved1 = CSD_Tab[0] & 0x03;
/* Byte 1 */
Csd->TAAC = CSD_Tab[1];
/* Byte 2 */
Csd->NSAC = CSD_Tab[2];
/* Byte 3 */
Csd->MaxBusClkFrec = CSD_Tab[3];
/* Byte 4 */
Csd->CardComdClasses = CSD_Tab[4] << 4;
/* Byte 5 */
Csd->CardComdClasses |= (CSD_Tab[5] & 0xF0) >> 4;
Csd->RdBlockLen = CSD_Tab[5] & 0x0F;
/* Byte 6 */
Csd->PartBlockRead = (CSD_Tab[6] & 0x80) >> 7;
Csd->WrBlockMisalign = (CSD_Tab[6] & 0x40) >> 6;
Csd->RdBlockMisalign = (CSD_Tab[6] & 0x20) >> 5;
Csd->DSRImpl = (CSD_Tab[6] & 0x10) >> 4;
Csd->Reserved2 = 0; /*!< Reserved */
Csd->DeviceSize = (CSD_Tab[6] & 0x03) << 10;
/* Byte 7 */
Csd->DeviceSize |= (CSD_Tab[7]) << 2;
/* Byte 8 */
Csd->DeviceSize |= (CSD_Tab[8] & 0xC0) >> 6;
Csd->MaxRdCurrentVDDMin = (CSD_Tab[8] & 0x38) >> 3;
Csd->MaxRdCurrentVDDMax = (CSD_Tab[8] & 0x07);
/* Byte 9 */
Csd->MaxWrCurrentVDDMin = (CSD_Tab[9] & 0xE0) >> 5;
Csd->MaxWrCurrentVDDMax = (CSD_Tab[9] & 0x1C) >> 2;
Csd->DeviceSizeMul = (CSD_Tab[9] & 0x03) << 1;
/* Byte 10 */
Csd->DeviceSizeMul |= (CSD_Tab[10] & 0x80) >> 7;
Csd->EraseGrSize = (CSD_Tab[10] & 0x40) >> 6;
Csd->EraseGrMul = (CSD_Tab[10] & 0x3F) << 1;
/* Byte 11 */
Csd->EraseGrMul |= (CSD_Tab[11] & 0x80) >> 7;
Csd->WrProtectGrSize = (CSD_Tab[11] & 0x7F);
/* Byte 12 */
Csd->WrProtectGrEnable = (CSD_Tab[12] & 0x80) >> 7;
Csd->ManDeflECC = (CSD_Tab[12] & 0x60) >> 5;
Csd->WrSpeedFact = (CSD_Tab[12] & 0x1C) >> 2;
Csd->MaxWrBlockLen = (CSD_Tab[12] & 0x03) << 2;
/* Byte 13 */
Csd->MaxWrBlockLen |= (CSD_Tab[13] & 0xC0) >> 6;
Csd->WriteBlockPaPartial = (CSD_Tab[13] & 0x20) >> 5;
Csd->Reserved3 = 0;
Csd->ContentProtectAppli = (CSD_Tab[13] & 0x01);
/* Byte 14 */
Csd->FileFormatGrouop = (CSD_Tab[14] & 0x80) >> 7;
Csd->CopyFlag = (CSD_Tab[14] & 0x40) >> 6;
Csd->PermWrProtect = (CSD_Tab[14] & 0x20) >> 5;
Csd->TempWrProtect = (CSD_Tab[14] & 0x10) >> 4;
Csd->FileFormat = (CSD_Tab[14] & 0x0C) >> 2;
Csd->ECC = (CSD_Tab[14] & 0x03);
/* Byte 15 */
Csd->CSD_CRC = (CSD_Tab[15] & 0xFE) >> 1;
Csd->Reserved4 = 1;
}
