Beispiel #1
0
/**
 * @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");

}
Beispiel #2
0
DRESULT disk_write (
        BYTE drv,                       /* Physical drive nmuber (0..) */
        const BYTE *buff,       /* Data to be written */
        DWORD sector,           /* Sector address (LBA) */
        BYTE count                      /* Number of sectors to write (1..255) */
)
{
	SD_Error Status;

#ifdef DBGIO
	printf("disk_write %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--)
		{
			memcpy(scratch, buff, BLOCK_SIZE);

			res = disk_write(drv, (void *)scratch, sector++, 1);

			if (res != RES_OK)
				break;

			buff += BLOCK_SIZE;
		}

		return(res);
	}

  Status = SD_WriteMultiBlocksFIXED((uint8_t *)buff, sector, BLOCK_SIZE, count); // 4GB Compliant

	if (Status == SD_OK)
	{
		SDTransferState State;

		Status = SD_WaitWriteOperation(); // 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);
}