diskio.c

#if !defined(PC)
/*-----------------------------------------------------------------------*/
/* Low level disk I/O module skeleton for FatFs     (C)ChaN, 2016        */
/*-----------------------------------------------------------------------*/
/* If a working storage control module is available, it should be        */
/* attached to the FatFs via a glue function rather than modifying it.   */
/* This is an example of glue functions to attach various exsisting      */
/* storage control modules to the FatFs module with a defined API.       */
/*-----------------------------------------------------------------------*/

#include "diskio.h"		/* FatFs lower layer API */
#include "sdcard.h"

/* Definitions of physical drive number for each drive */
#define M0		0	/* Example: Map MMC/SD card to physical drive 0 */


/*-----------------------------------------------------------------------*/
/* Get Drive Status                                                      */
/*-----------------------------------------------------------------------*/

DSTATUS disk_status(BYTE pdrv)
{
	return 0;
}



/*-----------------------------------------------------------------------*/
/* Inidialize a Drive                                                    */
/*-----------------------------------------------------------------------*/

DSTATUS disk_initialize(BYTE pdrv)
{
	if (sd_init() == 0)
		return 0;
	return STA_NOINIT;
}



/*-----------------------------------------------------------------------*/
/* Read Sector(s)                                                        */
/*-----------------------------------------------------------------------*/

DRESULT disk_read(BYTE pdrv, BYTE *buff, DWORD sector, UINT count)
{
	if (sd_read_sector_dma(buff, sector, count) == 0)
		return RES_OK;
	return RES_ERROR;
}



/*-----------------------------------------------------------------------*/
/* Write Sector(s)                                                       */
/*-----------------------------------------------------------------------*/

DRESULT disk_write(BYTE pdrv, const BYTE *buff, DWORD sector, UINT count)
{
	if (sd_write_sector_dma((BYTE *)buff, sector, count) == 0)
		return RES_OK;
	return RES_ERROR;
}



/*-----------------------------------------------------------------------*/
/* Miscellaneous Functions                                               */
/*-----------------------------------------------------------------------*/

DRESULT disk_ioctl(BYTE pdrv, BYTE cmd, void *buff)
{
	DRESULT res = RES_ERROR;

	switch (cmd) {
	/* Make sure that no pending write process */
	case CTRL_SYNC:
		res = RES_OK;
		break;
	/* Get number of sectors on the disk (DWORD) */
	case GET_SECTOR_COUNT:
		*(DWORD *)buff = (cardinfo.SD_csd.DeviceSize + 1) << 10;
		res = RES_OK;
		break;
	/* Get R/W sector size (WORD) */
	case GET_SECTOR_SIZE:
		*(WORD *)buff = cardinfo.CardBlockSize;
		res = RES_OK;
		break;
	/* Get erase block size in unit of sector (DWORD) */
	case GET_BLOCK_SIZE:
		*(DWORD *)buff = cardinfo.CardBlockSize;
		res = RES_OK;
		break;
	default:
		res = RES_PARERR;
	}
	return res;
}
#endif