/**
* @brief Sends 5 bytes command to the SD card and get response
* @param Cmd: The user expected command to send to SD card.
* @param Arg: The command argument.
* @param Crc: The CRC.
* @param Response: Expected response from the SD card
* @retval HAL_StatusTypeDef HAL Status
*/
HAL_StatusTypeDef SD_IO_WriteCmd(uint8_t Cmd, uint32_t Arg, uint8_t Crc, uint8_t Response)
{
uint32_t counter = 0x00;
uint8_t frame[6] = {0};
/* Prepare Frame to send */
frame[0] = (Cmd | 0x40); /* Construct byte 1 */
frame[1] = (uint8_t)(Arg >> 24); /* Construct byte 2 */
frame[2] = (uint8_t)(Arg >> 16); /* Construct byte 3 */
frame[3] = (uint8_t)(Arg >> 8); /* Construct byte 4 */
frame[4] = (uint8_t)(Arg); /* Construct byte 5 */
frame[5] = (Crc); /* Construct byte 6 */
/* SD chip select low */
SD_CS_LOW();
/* Send Frame */
for (counter = 0; counter < 6; counter++)
{
SD_IO_WriteByte(frame[counter]); /* Send the Cmd bytes */
}
if(Response != SD_NO_RESPONSE_EXPECTED)
{
return SD_IO_WaitResponse(Response);
}
return HAL_OK;
}
/**
* @brief Erases the specified memory area of the given SD card.
* @param StartAddr: Start byte address
* @param EndAddr: End byte address
* @retval SD status
*/
uint8_t BSP_SD_Erase(uint32_t StartAddr, uint32_t EndAddr)
{
uint8_t rvalue = SD_RESPONSE_FAILURE;
/* Send CMD32 (Erase group start) and check if the SD acknowledged the erase command: R1 response (0x00: no errors) */
if (!SD_SendCmd(SD_CMD_SD_ERASE_GRP_START, StartAddr, 0xFF, SD_RESPONSE_NO_ERROR))
{
/* Send CMD33 (Erase group end) and Check if the SD acknowledged the erase command: R1 response (0x00: no errors) */
if (!SD_SendCmd(SD_CMD_SD_ERASE_GRP_END, EndAddr, 0xFF, SD_RESPONSE_NO_ERROR))
{
/* Send CMD38 (Erase) and Check if the SD acknowledged the erase command: R1 response (0x00: no errors) */
if (!SD_SendCmd(SD_CMD_ERASE, 0, 0xFF, SD_RESPONSE_NO_ERROR))
{
/* Verify that SD card is ready to use after the specific command ERASE */
rvalue = (uint8_t)SD_IO_WaitResponse(SD_RESPONSE_NO_ERROR);
}
}
}
/* Return the response */
if (rvalue == SD_RESPONSE_NO_ERROR)
{
return MSD_OK;
}
else
{
return MSD_ERROR;
}
}
/**
* @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 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;
}