--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/fatfs/diskio.c	Wed Apr 03 23:34:20 2013 +1030
@@ -0,0 +1,236 @@
+/*-----------------------------------------------------------------------*/
+/* Low level disk I/O module skeleton for FatFs     (C)ChaN, 2013        */
+/*-----------------------------------------------------------------------*/
+/* 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 module to the FatFs module with a defined API.        */
+/*-----------------------------------------------------------------------*/
+
+#include "diskio.h"		/* FatFs lower layer API */
+#include "usbdisk.h"	/* Example: USB drive control */
+#include "atadrive.h"	/* Example: ATA drive control */
+#include "sdcard.h"		/* Example: MMC/SDC contorl */
+
+/* Definitions of physical drive number for each media */
+#define ATA		0
+#define MMC		1
+#define USB		2
+
+
+/*-----------------------------------------------------------------------*/
+/* Inidialize a Drive                                                    */
+/*-----------------------------------------------------------------------*/
+
+DSTATUS disk_initialize (
+	BYTE pdrv				/* Physical drive nmuber (0..) */
+)
+{
+	DSTATUS stat;
+	int result;
+
+	switch (pdrv) {
+	case ATA :
+		result = ATA_disk_initialize();
+
+		// translate the reslut code here
+
+		return stat;
+
+	case MMC :
+		result = MMC_disk_initialize();
+
+		// translate the reslut code here
+
+		return stat;
+
+	case USB :
+		result = USB_disk_initialize();
+
+		// translate the reslut code here
+
+		return stat;
+	}
+	return STA_NOINIT;
+}
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Get Disk Status                                                       */
+/*-----------------------------------------------------------------------*/
+
+DSTATUS disk_status (
+	BYTE pdrv		/* Physical drive nmuber (0..) */
+)
+{
+	DSTATUS stat;
+	int result;
+
+	switch (pdrv) {
+	case ATA :
+		result = ATA_disk_status();
+
+		// translate the reslut code here
+
+		return stat;
+
+	case MMC :
+		result = MMC_disk_status();
+
+		// translate the reslut code here
+
+		return stat;
+
+	case USB :
+		result = USB_disk_status();
+
+		// translate the reslut code here
+
+		return stat;
+	}
+	return STA_NOINIT;
+}
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Read Sector(s)                                                        */
+/*-----------------------------------------------------------------------*/
+
+DRESULT disk_read (
+	BYTE pdrv,		/* 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..128) */
+)
+{
+	DRESULT res;
+	int result;
+
+	switch (pdrv) {
+	case ATA :
+		// translate the arguments here
+
+		result = ATA_disk_read(buff, sector, count);
+
+		// translate the reslut code here
+
+		return res;
+
+	case MMC :
+		// translate the arguments here
+
+		result = MMC_disk_read(buff, sector, count);
+
+		// translate the reslut code here
+
+		return res;
+
+	case USB :
+		// translate the arguments here
+
+		result = USB_disk_read(buff, sector, count);
+
+		// translate the reslut code here
+
+		return res;
+	}
+	return RES_PARERR;
+}
+
+
+
+/*-----------------------------------------------------------------------*/
+/* Write Sector(s)                                                       */
+/*-----------------------------------------------------------------------*/
+
+#if _USE_WRITE
+DRESULT disk_write (
+	BYTE pdrv,			/* Physical drive nmuber (0..) */
+	const BYTE *buff,	/* Data to be written */
+	DWORD sector,		/* Sector address (LBA) */
+	BYTE count			/* Number of sectors to write (1..128) */
+)
+{
+	DRESULT res;
+	int result;
+
+	switch (pdrv) {
+	case ATA :
+		// translate the arguments here
+
+		result = ATA_disk_write(buff, sector, count);
+
+		// translate the reslut code here
+
+		return res;
+
+	case MMC :
+		// translate the arguments here
+
+		result = MMC_disk_write(buff, sector, count);
+
+		// translate the reslut code here
+
+		return res;
+
+	case USB :
+		// translate the arguments here
+
+		result = USB_disk_write(buff, sector, count);
+
+		// translate the reslut code here
+
+		return res;
+	}
+	return RES_PARERR;
+}
+#endif
+
+
+/*-----------------------------------------------------------------------*/
+/* Miscellaneous Functions                                               */
+/*-----------------------------------------------------------------------*/
+
+#if _USE_IOCTL
+DRESULT disk_ioctl (
+	BYTE pdrv,		/* Physical drive nmuber (0..) */
+	BYTE cmd,		/* Control code */
+	void *buff		/* Buffer to send/receive control data */
+)
+{
+	DRESULT res;
+	int result;
+
+	switch (pdrv) {
+	case ATA :
+		// pre-process here
+
+		result = ATA_disk_ioctl(cmd, buff);
+
+		// post-process here
+
+		return res;
+
+	case MMC :
+		// pre-process here
+
+		result = MMC_disk_ioctl(cmd, buff);
+
+		// post-process here
+
+		return res;
+
+	case USB :
+		// pre-process here
+
+		result = USB_disk_ioctl(cmd, buff);
+
+		// post-process here
+
+		return res;
+	}
+	return RES_PARERR;
+}
+#endif