/**
* @brief Tests the SD card Multiple Blocks operations.
* @param None
* @retval None
*/
static void SD_MultiBlockTest(void)
{
SD_Error status;
/* Fill the buffer to send */
Fill_Buffer(aBuffer_MultiBlock_Tx, MULTI_BUFFER_SIZE, 0x0);
/* Write Multiple Block of many bytes on address 0 */
status = SD_WriteMultiBlocksFIXED(aBuffer_MultiBlock_Tx, 0, BLOCK_SIZE, NUMBER_OF_BLOCKS);
/* check if the Transfer finished */
status = SD_WaitWriteOperation();
while(SD_GetStatus() != SD_TRANSFER_OK);
if(status == SD_OK)
{
/* Read Block of many bytes from address 0 */
status = SD_ReadMultiBlocksFIXED(aBuffer_MultiBlock_Rx, 0, BLOCK_SIZE, NUMBER_OF_BLOCKS);
/* check if the Transfer finished */
status = SD_WaitReadOperation();
while(SD_GetStatus() != SD_TRANSFER_OK);
}
/* Check the correctness of written data */
if(status == SD_OK)
{
TransferStatus2 = Buffercmp(aBuffer_MultiBlock_Tx, aBuffer_MultiBlock_Rx,MULTI_BUFFER_SIZE);
}
if(TransferStatus2 == PASSED) printf("SD Multiple block test passed!\n\r");
}
DRESULT disk_read (
BYTE drv, /* Physical drive nmuber (0..) */
BYTE *buff, /* Data buffer to store read data */
DWORD sector, /* Sector address (LBA) */
BYTE count /* Number of sectors to read (1..255) */
)
{
SD_Error Status;
#ifdef DBGIO
printf("disk_read %d %p %10d %d\n",drv,buff,sector,count);
#endif
if (SD_Detect() != SD_PRESENT)
return(RES_NOTRDY);
if ((DWORD)buff & 3) // DMA Alignment failure, do single up to aligned buffer
{
DRESULT res = RES_OK;
DWORD scratch[BLOCK_SIZE / 4]; // Alignment assured, you'll need a sufficiently big stack
while(count--)
{
res = disk_read(drv, (void *)scratch, sector++, 1);
if (res != RES_OK)
break;
memcpy(buff, scratch, BLOCK_SIZE);
buff += BLOCK_SIZE;
}
return(res);
}
Status = SD_ReadMultiBlocksFIXED(buff, sector, BLOCK_SIZE, count); // 4GB Compliant
if (Status == SD_OK)
{
SDTransferState State;
Status = SD_WaitReadOperation(); // Check if the Transfer is finished
while((State = SD_GetStatus()) == SD_TRANSFER_BUSY); // BUSY, OK (DONE), ERROR (FAIL)
if ((State == SD_TRANSFER_ERROR) || (Status != SD_OK))
return(RES_ERROR);
else
return(RES_OK);
}
else
return(RES_ERROR);
}
