Shinichiro Nakamura / FatFileSystem

Local copy of the FatFileSystem.

Dependents:   SimpleWaveRecorderPlayer y_CameraC1098_ES_01 _test_SDHCFileSystem Application-SimpleWaveRecorderPlayerGenerator ... more

diskio.c@0:8c55801ce311, 2012-04-14 (annotated)

Committer:
shintamainjp
Date:
Sat Apr 14 02:24:08 2012 +0000
Revision:
0:8c55801ce311
Initial version.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
shintamainjp 0:8c55801ce311 1 /*-----------------------------------------------------------------------*/
shintamainjp 0:8c55801ce311 2 /* Low level disk I/O module skeleton for FatFs (C)ChaN, 2007 */
shintamainjp 0:8c55801ce311 3 /*-----------------------------------------------------------------------*/
shintamainjp 0:8c55801ce311 4 /* This is a stub disk I/O module that acts as front end of the existing */
shintamainjp 0:8c55801ce311 5 /* disk I/O modules and attach it to FatFs module with common interface. */
shintamainjp 0:8c55801ce311 6 /*-----------------------------------------------------------------------*/
shintamainjp 0:8c55801ce311 7
shintamainjp 0:8c55801ce311 8 #include "diskio.h"
shintamainjp 0:8c55801ce311 9 #include <stdio.h>
shintamainjp 0:8c55801ce311 10 #include <string.h>
shintamainjp 0:8c55801ce311 11 #include "FATFileSystem.h"
shintamainjp 0:8c55801ce311 12
shintamainjp 0:8c55801ce311 13 #include "mbed.h"
shintamainjp 0:8c55801ce311 14
shintamainjp 0:8c55801ce311 15 DSTATUS disk_initialize (
shintamainjp 0:8c55801ce311 16 BYTE drv /* Physical drive nmuber (0..) */
shintamainjp 0:8c55801ce311 17 )
shintamainjp 0:8c55801ce311 18 {
shintamainjp 0:8c55801ce311 19 FFSDEBUG("disk_initialize on drv [%d]\n", drv);
shintamainjp 0:8c55801ce311 20 return (DSTATUS)FATFileSystem::_ffs[drv]->disk_initialize();
shintamainjp 0:8c55801ce311 21 }
shintamainjp 0:8c55801ce311 22
shintamainjp 0:8c55801ce311 23 DSTATUS disk_status (
shintamainjp 0:8c55801ce311 24 BYTE drv /* Physical drive nmuber (0..) */
shintamainjp 0:8c55801ce311 25 )
shintamainjp 0:8c55801ce311 26 {
shintamainjp 0:8c55801ce311 27 FFSDEBUG("disk_status on drv [%d]\n", drv);
shintamainjp 0:8c55801ce311 28 return (DSTATUS)FATFileSystem::_ffs[drv]->disk_status();
shintamainjp 0:8c55801ce311 29 }
shintamainjp 0:8c55801ce311 30
shintamainjp 0:8c55801ce311 31 DRESULT disk_read (
shintamainjp 0:8c55801ce311 32 BYTE drv, /* Physical drive nmuber (0..) */
shintamainjp 0:8c55801ce311 33 BYTE *buff, /* Data buffer to store read data */
shintamainjp 0:8c55801ce311 34 DWORD sector, /* Sector address (LBA) */
shintamainjp 0:8c55801ce311 35 BYTE count /* Number of sectors to read (1..255) */
shintamainjp 0:8c55801ce311 36 )
shintamainjp 0:8c55801ce311 37 {
shintamainjp 0:8c55801ce311 38 FFSDEBUG("disk_read(sector %d, count %d) on drv [%d]\n", sector, count, drv);
shintamainjp 0:8c55801ce311 39 for(DWORD s=sector; s<sector+count; s++) {
shintamainjp 0:8c55801ce311 40 FFSDEBUG(" disk_read(sector %d)\n", s);
shintamainjp 0:8c55801ce311 41 int res = FATFileSystem::_ffs[drv]->disk_read((char*)buff, s);
shintamainjp 0:8c55801ce311 42 if(res) {
shintamainjp 0:8c55801ce311 43 return RES_PARERR;
shintamainjp 0:8c55801ce311 44 }
shintamainjp 0:8c55801ce311 45 buff += 512;
shintamainjp 0:8c55801ce311 46 }
shintamainjp 0:8c55801ce311 47 return RES_OK;
shintamainjp 0:8c55801ce311 48 }
shintamainjp 0:8c55801ce311 49
shintamainjp 0:8c55801ce311 50 #if _READONLY == 0
shintamainjp 0:8c55801ce311 51 DRESULT disk_write (
shintamainjp 0:8c55801ce311 52 BYTE drv, /* Physical drive nmuber (0..) */
shintamainjp 0:8c55801ce311 53 const BYTE *buff, /* Data to be written */
shintamainjp 0:8c55801ce311 54 DWORD sector, /* Sector address (LBA) */
shintamainjp 0:8c55801ce311 55 BYTE count /* Number of sectors to write (1..255) */
shintamainjp 0:8c55801ce311 56 )
shintamainjp 0:8c55801ce311 57 {
shintamainjp 0:8c55801ce311 58 FFSDEBUG("disk_write(sector %d, count %d) on drv [%d]\n", sector, count, drv);
shintamainjp 0:8c55801ce311 59 for(DWORD s=sector; s<sector+count; s++) {
shintamainjp 0:8c55801ce311 60 FFSDEBUG(" disk_write(sector %d)\n", s);
shintamainjp 0:8c55801ce311 61 int res = FATFileSystem::_ffs[drv]->disk_write((char*)buff, s);
shintamainjp 0:8c55801ce311 62 if(res) {
shintamainjp 0:8c55801ce311 63 return RES_PARERR;
shintamainjp 0:8c55801ce311 64 }
shintamainjp 0:8c55801ce311 65 buff += 512;
shintamainjp 0:8c55801ce311 66 }
shintamainjp 0:8c55801ce311 67 return RES_OK;
shintamainjp 0:8c55801ce311 68 }
shintamainjp 0:8c55801ce311 69 #endif /* _READONLY */
shintamainjp 0:8c55801ce311 70
shintamainjp 0:8c55801ce311 71 DRESULT disk_ioctl (
shintamainjp 0:8c55801ce311 72 BYTE drv, /* Physical drive nmuber (0..) */
shintamainjp 0:8c55801ce311 73 BYTE ctrl, /* Control code */
shintamainjp 0:8c55801ce311 74 void *buff /* Buffer to send/receive control data */
shintamainjp 0:8c55801ce311 75 )
shintamainjp 0:8c55801ce311 76 {
shintamainjp 0:8c55801ce311 77 FFSDEBUG("disk_ioctl(%d)\n", ctrl);
shintamainjp 0:8c55801ce311 78 switch(ctrl) {
shintamainjp 0:8c55801ce311 79 case CTRL_SYNC:
shintamainjp 0:8c55801ce311 80 if(FATFileSystem::_ffs[drv] == NULL) {
shintamainjp 0:8c55801ce311 81 return RES_NOTRDY;
shintamainjp 0:8c55801ce311 82 } else if(FATFileSystem::_ffs[drv]->disk_sync()) {
shintamainjp 0:8c55801ce311 83 return RES_ERROR;
shintamainjp 0:8c55801ce311 84 }
shintamainjp 0:8c55801ce311 85 return RES_OK;
shintamainjp 0:8c55801ce311 86 case GET_SECTOR_COUNT:
shintamainjp 0:8c55801ce311 87 if(FATFileSystem::_ffs[drv] == NULL) {
shintamainjp 0:8c55801ce311 88 return RES_NOTRDY;
shintamainjp 0:8c55801ce311 89 } else {
shintamainjp 0:8c55801ce311 90 int res = FATFileSystem::_ffs[drv]->disk_sectors();
shintamainjp 0:8c55801ce311 91 if(res > 0) {
shintamainjp 0:8c55801ce311 92 *((DWORD*)buff) = res; // minimum allowed
shintamainjp 0:8c55801ce311 93 return RES_OK;
shintamainjp 0:8c55801ce311 94 } else {
shintamainjp 0:8c55801ce311 95 return RES_ERROR;
shintamainjp 0:8c55801ce311 96 }
shintamainjp 0:8c55801ce311 97 }
shintamainjp 0:8c55801ce311 98 case GET_BLOCK_SIZE:
shintamainjp 0:8c55801ce311 99 *((DWORD*)buff) = 1; // default when not known
shintamainjp 0:8c55801ce311 100 return RES_OK;
shintamainjp 0:8c55801ce311 101
shintamainjp 0:8c55801ce311 102 }
shintamainjp 0:8c55801ce311 103 return RES_PARERR;
shintamainjp 0:8c55801ce311 104 }
shintamainjp 0:8c55801ce311 105