Kazuki Yamamoto / USBFileSystem

Dependents:   USBMSD_CDC_11U35test

Fork of USBFileSystem by Erik -

FATFileSystem/ChaN/diskio.cpp@2:9af05743d551, 2013-10-23 (annotated)

Committer:
Sissors
Date:
Wed Oct 23 20:32:07 2013 +0000
Revision:
2:9af05743d551
FATFileSystem 'Tiny' option enabled -> Primary to solve a buffering issue when USB writes a file, also reduces RAM consumed

;

; USBDevice back to main branch

;

; USBMode 1 is default now

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Sissors 2:9af05743d551 1 /*-----------------------------------------------------------------------*/
Sissors 2:9af05743d551 2 /* Low level disk I/O module skeleton for FatFs (C)ChaN, 2007 */
Sissors 2:9af05743d551 3 /*-----------------------------------------------------------------------*/
Sissors 2:9af05743d551 4 /* This is a stub disk I/O module that acts as front end of the existing */
Sissors 2:9af05743d551 5 /* disk I/O modules and attach it to FatFs module with common interface. */
Sissors 2:9af05743d551 6 /*-----------------------------------------------------------------------*/
Sissors 2:9af05743d551 7 #include "ffconf.h"
Sissors 2:9af05743d551 8 #include "diskio.h"
Sissors 2:9af05743d551 9
Sissors 2:9af05743d551 10 #include "mbed_debug.h"
Sissors 2:9af05743d551 11 #include "FATFileSystem.h"
Sissors 2:9af05743d551 12
Sissors 2:9af05743d551 13 using namespace mbed;
Sissors 2:9af05743d551 14
Sissors 2:9af05743d551 15 DSTATUS disk_initialize (
Sissors 2:9af05743d551 16 BYTE drv /* Physical drive nmuber (0..) */
Sissors 2:9af05743d551 17 )
Sissors 2:9af05743d551 18 {
Sissors 2:9af05743d551 19 debug_if(FFS_DBG, "disk_initialize on drv [%d]\n", drv);
Sissors 2:9af05743d551 20 return (DSTATUS)FATFileSystem::_ffs[drv]->disk_initialize();
Sissors 2:9af05743d551 21 }
Sissors 2:9af05743d551 22
Sissors 2:9af05743d551 23 DSTATUS disk_status (
Sissors 2:9af05743d551 24 BYTE drv /* Physical drive nmuber (0..) */
Sissors 2:9af05743d551 25 )
Sissors 2:9af05743d551 26 {
Sissors 2:9af05743d551 27 debug_if(FFS_DBG, "disk_status on drv [%d]\n", drv);
Sissors 2:9af05743d551 28 return (DSTATUS)FATFileSystem::_ffs[drv]->disk_status();
Sissors 2:9af05743d551 29 }
Sissors 2:9af05743d551 30
Sissors 2:9af05743d551 31 DRESULT disk_read (
Sissors 2:9af05743d551 32 BYTE drv, /* Physical drive nmuber (0..) */
Sissors 2:9af05743d551 33 BYTE *buff, /* Data buffer to store read data */
Sissors 2:9af05743d551 34 DWORD sector, /* Sector address (LBA) */
Sissors 2:9af05743d551 35 BYTE count /* Number of sectors to read (1..255) */
Sissors 2:9af05743d551 36 )
Sissors 2:9af05743d551 37 {
Sissors 2:9af05743d551 38 debug_if(FFS_DBG, "disk_read(sector %d, count %d) on drv [%d]\n", sector, count, drv);
Sissors 2:9af05743d551 39 for(DWORD s=sector; s<sector+count; s++) {
Sissors 2:9af05743d551 40 debug_if(FFS_DBG, " disk_read(sector %d)\n", s);
Sissors 2:9af05743d551 41 int res = FATFileSystem::_ffs[drv]->disk_read((uint8_t*)buff, s);
Sissors 2:9af05743d551 42 if(res) {
Sissors 2:9af05743d551 43 return RES_PARERR;
Sissors 2:9af05743d551 44 }
Sissors 2:9af05743d551 45 buff += 512;
Sissors 2:9af05743d551 46 }
Sissors 2:9af05743d551 47 return RES_OK;
Sissors 2:9af05743d551 48 }
Sissors 2:9af05743d551 49
Sissors 2:9af05743d551 50 #if _READONLY == 0
Sissors 2:9af05743d551 51 DRESULT disk_write (
Sissors 2:9af05743d551 52 BYTE drv, /* Physical drive nmuber (0..) */
Sissors 2:9af05743d551 53 const BYTE *buff, /* Data to be written */
Sissors 2:9af05743d551 54 DWORD sector, /* Sector address (LBA) */
Sissors 2:9af05743d551 55 BYTE count /* Number of sectors to write (1..255) */
Sissors 2:9af05743d551 56 )
Sissors 2:9af05743d551 57 {
Sissors 2:9af05743d551 58 debug_if(FFS_DBG, "disk_write(sector %d, count %d) on drv [%d]\n", sector, count, drv);
Sissors 2:9af05743d551 59 for(DWORD s = sector; s < sector + count; s++) {
Sissors 2:9af05743d551 60 debug_if(FFS_DBG, " disk_write(sector %d)\n", s);
Sissors 2:9af05743d551 61 int res = FATFileSystem::_ffs[drv]->disk_write((uint8_t*)buff, s);
Sissors 2:9af05743d551 62 if(res) {
Sissors 2:9af05743d551 63 return RES_PARERR;
Sissors 2:9af05743d551 64 }
Sissors 2:9af05743d551 65 buff += 512;
Sissors 2:9af05743d551 66 }
Sissors 2:9af05743d551 67 return RES_OK;
Sissors 2:9af05743d551 68 }
Sissors 2:9af05743d551 69 #endif /* _READONLY */
Sissors 2:9af05743d551 70
Sissors 2:9af05743d551 71 DRESULT disk_ioctl (
Sissors 2:9af05743d551 72 BYTE drv, /* Physical drive nmuber (0..) */
Sissors 2:9af05743d551 73 BYTE ctrl, /* Control code */
Sissors 2:9af05743d551 74 void *buff /* Buffer to send/receive control data */
Sissors 2:9af05743d551 75 )
Sissors 2:9af05743d551 76 {
Sissors 2:9af05743d551 77 debug_if(FFS_DBG, "disk_ioctl(%d)\n", ctrl);
Sissors 2:9af05743d551 78 switch(ctrl) {
Sissors 2:9af05743d551 79 case CTRL_SYNC:
Sissors 2:9af05743d551 80 if(FATFileSystem::_ffs[drv] == NULL) {
Sissors 2:9af05743d551 81 return RES_NOTRDY;
Sissors 2:9af05743d551 82 } else if(FATFileSystem::_ffs[drv]->disk_sync()) {
Sissors 2:9af05743d551 83 return RES_ERROR;
Sissors 2:9af05743d551 84 }
Sissors 2:9af05743d551 85 return RES_OK;
Sissors 2:9af05743d551 86 case GET_SECTOR_COUNT:
Sissors 2:9af05743d551 87 if(FATFileSystem::_ffs[drv] == NULL) {
Sissors 2:9af05743d551 88 return RES_NOTRDY;
Sissors 2:9af05743d551 89 } else {
Sissors 2:9af05743d551 90 DWORD res = FATFileSystem::_ffs[drv]->disk_sectors();
Sissors 2:9af05743d551 91 if(res > 0) {
Sissors 2:9af05743d551 92 *((DWORD*)buff) = res; // minimum allowed
Sissors 2:9af05743d551 93 return RES_OK;
Sissors 2:9af05743d551 94 } else {
Sissors 2:9af05743d551 95 return RES_ERROR;
Sissors 2:9af05743d551 96 }
Sissors 2:9af05743d551 97 }
Sissors 2:9af05743d551 98 case GET_BLOCK_SIZE:
Sissors 2:9af05743d551 99 *((DWORD*)buff) = 1; // default when not known
Sissors 2:9af05743d551 100 return RES_OK;
Sissors 2:9af05743d551 101
Sissors 2:9af05743d551 102 }
Sissors 2:9af05743d551 103 return RES_PARERR;
Sissors 2:9af05743d551 104 }