Diff: diskio.cpp

Revision:

1:88f22c32a456

Parent:

0:6ceefe1c53e4

Child:

2:5cdf6d5c3b68

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/diskio.cpp	Mon Jul 30 13:45:05 2012 +0000
@@ -0,0 +1,105 @@
+/*-----------------------------------------------------------------------*/
+/* Low level disk I/O module skeleton for FatFs     (C)ChaN, 2007        */
+/*-----------------------------------------------------------------------*/
+/* This is a stub disk I/O module that acts as front end of the existing */
+/* disk I/O modules and attach it to FatFs module with common interface. */
+/*-----------------------------------------------------------------------*/
+
+#include "diskio.h"
+#include <stdio.h>
+#include <string.h>
+#include "FATFileSystem.h"
+
+#include "mbed.h"
+
+DSTATUS disk_initialize (
+	BYTE drv				/* Physical drive nmuber (0..) */
+) 
+{
+	FFSDEBUG("disk_initialize on drv [%d]\n", drv);
+	return (DSTATUS)FATFileSystem::_ffs[drv]->disk_initialize();
+}
+
+DSTATUS disk_status (
+	BYTE drv		/* Physical drive nmuber (0..) */
+) 
+{
+	FFSDEBUG("disk_status on drv [%d]\n", drv);
+	return (DSTATUS)FATFileSystem::_ffs[drv]->disk_status();
+}
+
+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) */
+)
+{
+	FFSDEBUG("disk_read(sector %d, count %d) on drv [%d]\n", sector, count, drv);
+	for(DWORD s=sector; s<sector+count; s++) {
+		FFSDEBUG(" disk_read(sector %d)\n", s);
+		int res = FATFileSystem::_ffs[drv]->disk_read((char*)buff, s);
+		if(res) {
+			return RES_PARERR;
+		}
+		buff += 512;
+	}
+	return RES_OK;
+}
+
+#if _READONLY == 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) */
+)
+{
+	FFSDEBUG("disk_write(sector %d, count %d) on drv [%d]\n", sector, count, drv);
+	for(DWORD s=sector; s<sector+count; s++) {
+		FFSDEBUG(" disk_write(sector %d)\n", s);
+		int res = FATFileSystem::_ffs[drv]->disk_write((char*)buff, s);
+		if(res) {
+			return RES_PARERR;
+		}
+		buff += 512;
+	}
+	return RES_OK;
+}
+#endif /* _READONLY */
+
+DRESULT disk_ioctl (
+	BYTE drv,		/* Physical drive nmuber (0..) */
+	BYTE ctrl,		/* Control code */
+	void *buff		/* Buffer to send/receive control data */
+)
+{
+	FFSDEBUG("disk_ioctl(%d)\n", ctrl);
+	switch(ctrl) {
+		case CTRL_SYNC:
+			if(FATFileSystem::_ffs[drv] == NULL) {
+				return RES_NOTRDY;
+			} else if(FATFileSystem::_ffs[drv]->disk_sync()) {
+				return RES_ERROR;
+			} 
+			return RES_OK;
+		case GET_SECTOR_COUNT:
+			if(FATFileSystem::_ffs[drv] == NULL) {
+				return RES_NOTRDY;
+			} else {
+				int res = FATFileSystem::_ffs[drv]->disk_sectors();
+				if(res > 0) {
+					*((DWORD*)buff) = res; // minimum allowed
+					return RES_OK;
+				} else {
+					return RES_ERROR;
+				}
+			}
+		case GET_BLOCK_SIZE:
+			*((DWORD*)buff) = 1; // default when not known
+			return RES_OK;
+
+	}
+	return RES_PARERR;
+}
+