Murat Kilivan / FATFileSystem

FAT file system

Dependents:   S25FL216K_FATFileSystem SDFileSystem

ChaN/diskio.cpp@0:b864b021fc6d, 2014-12-23 (annotated)

Committer:
mkilivan
Date:
Tue Dec 23 21:37:54 2014 +0000
Revision:
0:b864b021fc6d
initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mkilivan 0:b864b021fc6d 1 /*-----------------------------------------------------------------------*/
mkilivan 0:b864b021fc6d 2 /* Low level disk I/O module skeleton for FatFs (C)ChaN, 2007 */
mkilivan 0:b864b021fc6d 3 /*-----------------------------------------------------------------------*/
mkilivan 0:b864b021fc6d 4 /* This is a stub disk I/O module that acts as front end of the existing */
mkilivan 0:b864b021fc6d 5 /* disk I/O modules and attach it to FatFs module with common interface. */
mkilivan 0:b864b021fc6d 6 /*-----------------------------------------------------------------------*/
mkilivan 0:b864b021fc6d 7 #include "ffconf.h"
mkilivan 0:b864b021fc6d 8 #include "diskio.h"
mkilivan 0:b864b021fc6d 9
mkilivan 0:b864b021fc6d 10 #include "mbed_debug.h"
mkilivan 0:b864b021fc6d 11 #include "FATFileSystem.h"
mkilivan 0:b864b021fc6d 12
mkilivan 0:b864b021fc6d 13 using namespace mbed;
mkilivan 0:b864b021fc6d 14
mkilivan 0:b864b021fc6d 15 DSTATUS disk_initialize (
mkilivan 0:b864b021fc6d 16 BYTE drv /* Physical drive nmuber (0..) */
mkilivan 0:b864b021fc6d 17 )
mkilivan 0:b864b021fc6d 18 {
mkilivan 0:b864b021fc6d 19 debug_if(FFS_DBG, "disk_initialize on drv [%d]\n", drv);
mkilivan 0:b864b021fc6d 20 return (DSTATUS)FATFileSystem::_ffs[drv]->disk_initialize();
mkilivan 0:b864b021fc6d 21 }
mkilivan 0:b864b021fc6d 22
mkilivan 0:b864b021fc6d 23 DSTATUS disk_status (
mkilivan 0:b864b021fc6d 24 BYTE drv /* Physical drive nmuber (0..) */
mkilivan 0:b864b021fc6d 25 )
mkilivan 0:b864b021fc6d 26 {
mkilivan 0:b864b021fc6d 27 debug_if(FFS_DBG, "disk_status on drv [%d]\n", drv);
mkilivan 0:b864b021fc6d 28 return (DSTATUS)FATFileSystem::_ffs[drv]->disk_status();
mkilivan 0:b864b021fc6d 29 }
mkilivan 0:b864b021fc6d 30
mkilivan 0:b864b021fc6d 31 DRESULT disk_read (
mkilivan 0:b864b021fc6d 32 BYTE drv, /* Physical drive nmuber (0..) */
mkilivan 0:b864b021fc6d 33 BYTE *buff, /* Data buffer to store read data */
mkilivan 0:b864b021fc6d 34 DWORD sector, /* Sector address (LBA) */
mkilivan 0:b864b021fc6d 35 BYTE count /* Number of sectors to read (1..255) */
mkilivan 0:b864b021fc6d 36 )
mkilivan 0:b864b021fc6d 37 {
mkilivan 0:b864b021fc6d 38 debug_if(FFS_DBG, "disk_read(sector %d, count %d) on drv [%d]\n", sector, count, drv);
mkilivan 0:b864b021fc6d 39 for(DWORD s=sector; s<sector+count; s++) {
mkilivan 0:b864b021fc6d 40 debug_if(FFS_DBG, " disk_read(sector %d)\n", s);
mkilivan 0:b864b021fc6d 41 int res = FATFileSystem::_ffs[drv]->disk_read((uint8_t*)buff, s);
mkilivan 0:b864b021fc6d 42 if(res) {
mkilivan 0:b864b021fc6d 43 return RES_PARERR;
mkilivan 0:b864b021fc6d 44 }
mkilivan 0:b864b021fc6d 45 buff += 512;
mkilivan 0:b864b021fc6d 46 }
mkilivan 0:b864b021fc6d 47 return RES_OK;
mkilivan 0:b864b021fc6d 48 }
mkilivan 0:b864b021fc6d 49
mkilivan 0:b864b021fc6d 50 #if _READONLY == 0
mkilivan 0:b864b021fc6d 51 DRESULT disk_write (
mkilivan 0:b864b021fc6d 52 BYTE drv, /* Physical drive nmuber (0..) */
mkilivan 0:b864b021fc6d 53 const BYTE *buff, /* Data to be written */
mkilivan 0:b864b021fc6d 54 DWORD sector, /* Sector address (LBA) */
mkilivan 0:b864b021fc6d 55 BYTE count /* Number of sectors to write (1..255) */
mkilivan 0:b864b021fc6d 56 )
mkilivan 0:b864b021fc6d 57 {
mkilivan 0:b864b021fc6d 58 debug_if(FFS_DBG, "disk_write(sector %d, count %d) on drv [%d]\n", sector, count, drv);
mkilivan 0:b864b021fc6d 59 for(DWORD s = sector; s < sector + count; s++) {
mkilivan 0:b864b021fc6d 60 debug_if(FFS_DBG, " disk_write(sector %d)\n", s);
mkilivan 0:b864b021fc6d 61 int res = FATFileSystem::_ffs[drv]->disk_write((uint8_t*)buff, s);
mkilivan 0:b864b021fc6d 62 if(res) {
mkilivan 0:b864b021fc6d 63 return RES_PARERR;
mkilivan 0:b864b021fc6d 64 }
mkilivan 0:b864b021fc6d 65 buff += 512;
mkilivan 0:b864b021fc6d 66 }
mkilivan 0:b864b021fc6d 67 return RES_OK;
mkilivan 0:b864b021fc6d 68 }
mkilivan 0:b864b021fc6d 69 #endif /* _READONLY */
mkilivan 0:b864b021fc6d 70
mkilivan 0:b864b021fc6d 71 DRESULT disk_ioctl (
mkilivan 0:b864b021fc6d 72 BYTE drv, /* Physical drive nmuber (0..) */
mkilivan 0:b864b021fc6d 73 BYTE ctrl, /* Control code */
mkilivan 0:b864b021fc6d 74 void *buff /* Buffer to send/receive control data */
mkilivan 0:b864b021fc6d 75 )
mkilivan 0:b864b021fc6d 76 {
mkilivan 0:b864b021fc6d 77 debug_if(FFS_DBG, "disk_ioctl(%d)\n", ctrl);
mkilivan 0:b864b021fc6d 78 switch(ctrl) {
mkilivan 0:b864b021fc6d 79 case CTRL_SYNC:
mkilivan 0:b864b021fc6d 80 if(FATFileSystem::_ffs[drv] == NULL) {
mkilivan 0:b864b021fc6d 81 return RES_NOTRDY;
mkilivan 0:b864b021fc6d 82 } else if(FATFileSystem::_ffs[drv]->disk_sync()) {
mkilivan 0:b864b021fc6d 83 return RES_ERROR;
mkilivan 0:b864b021fc6d 84 }
mkilivan 0:b864b021fc6d 85 return RES_OK;
mkilivan 0:b864b021fc6d 86 case GET_SECTOR_COUNT:
mkilivan 0:b864b021fc6d 87 if(FATFileSystem::_ffs[drv] == NULL) {
mkilivan 0:b864b021fc6d 88 return RES_NOTRDY;
mkilivan 0:b864b021fc6d 89 } else {
mkilivan 0:b864b021fc6d 90 DWORD res = FATFileSystem::_ffs[drv]->disk_sectors();
mkilivan 0:b864b021fc6d 91 if(res > 0) {
mkilivan 0:b864b021fc6d 92 *((DWORD*)buff) = res; // minimum allowed
mkilivan 0:b864b021fc6d 93 return RES_OK;
mkilivan 0:b864b021fc6d 94 } else {
mkilivan 0:b864b021fc6d 95 return RES_ERROR;
mkilivan 0:b864b021fc6d 96 }
mkilivan 0:b864b021fc6d 97 }
mkilivan 0:b864b021fc6d 98 case GET_BLOCK_SIZE:
mkilivan 0:b864b021fc6d 99 *((DWORD*)buff) = 1; // default when not known
mkilivan 0:b864b021fc6d 100 return RES_OK;
mkilivan 0:b864b021fc6d 101
mkilivan 0:b864b021fc6d 102 }
mkilivan 0:b864b021fc6d 103 return RES_PARERR;
mkilivan 0:b864b021fc6d 104 }