Kazuki Yamamoto / USBFileSystem

Dependents:   USBMSD_CDC_11U35test

Fork of USBFileSystem by Erik -

FATFileSystem/ChaN/diskio.cpp@7:da1f3328a496, 2015-01-18 (annotated)

Committer:
Sissors
Date:
Sun Jan 18 21:31:55 2015 +0000
Revision:
7:da1f3328a496
Updated USBDevice and added count argument

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Sissors 7:da1f3328a496 1 /*-----------------------------------------------------------------------*/
Sissors 7:da1f3328a496 2 /* Low level disk I/O module skeleton for FatFs (C)ChaN, 2007 */
Sissors 7:da1f3328a496 3 /*-----------------------------------------------------------------------*/
Sissors 7:da1f3328a496 4 /* This is a stub disk I/O module that acts as front end of the existing */
Sissors 7:da1f3328a496 5 /* disk I/O modules and attach it to FatFs module with common interface. */
Sissors 7:da1f3328a496 6 /*-----------------------------------------------------------------------*/
Sissors 7:da1f3328a496 7 #include "ffconf.h"
Sissors 7:da1f3328a496 8 #include "diskio.h"
Sissors 7:da1f3328a496 9
Sissors 7:da1f3328a496 10 #include "mbed_debug.h"
Sissors 7:da1f3328a496 11 #include "FATFileSystem.h"
Sissors 7:da1f3328a496 12
Sissors 7:da1f3328a496 13 using namespace mbed;
Sissors 7:da1f3328a496 14
Sissors 7:da1f3328a496 15 DSTATUS disk_initialize (
Sissors 7:da1f3328a496 16 BYTE drv /* Physical drive nmuber (0..) */
Sissors 7:da1f3328a496 17 )
Sissors 7:da1f3328a496 18 {
Sissors 7:da1f3328a496 19 debug_if(FFS_DBG, "disk_initialize on drv [%d]\n", drv);
Sissors 7:da1f3328a496 20 return (DSTATUS)FATFileSystem::_ffs[drv]->disk_initialize();
Sissors 7:da1f3328a496 21 }
Sissors 7:da1f3328a496 22
Sissors 7:da1f3328a496 23 DSTATUS disk_status (
Sissors 7:da1f3328a496 24 BYTE drv /* Physical drive nmuber (0..) */
Sissors 7:da1f3328a496 25 )
Sissors 7:da1f3328a496 26 {
Sissors 7:da1f3328a496 27 debug_if(FFS_DBG, "disk_status on drv [%d]\n", drv);
Sissors 7:da1f3328a496 28 return (DSTATUS)FATFileSystem::_ffs[drv]->disk_status();
Sissors 7:da1f3328a496 29 }
Sissors 7:da1f3328a496 30
Sissors 7:da1f3328a496 31 DRESULT disk_read (
Sissors 7:da1f3328a496 32 BYTE drv, /* Physical drive nmuber (0..) */
Sissors 7:da1f3328a496 33 BYTE *buff, /* Data buffer to store read data */
Sissors 7:da1f3328a496 34 DWORD sector, /* Sector address (LBA) */
Sissors 7:da1f3328a496 35 BYTE count /* Number of sectors to read (1..255) */
Sissors 7:da1f3328a496 36 )
Sissors 7:da1f3328a496 37 {
Sissors 7:da1f3328a496 38 debug_if(FFS_DBG, "disk_read(sector %d, count %d) on drv [%d]\n", sector, count, drv);
Sissors 7:da1f3328a496 39 if (FATFileSystem::_ffs[drv]->disk_read((uint8_t*)buff, sector, count))
Sissors 7:da1f3328a496 40 return RES_PARERR;
Sissors 7:da1f3328a496 41 else
Sissors 7:da1f3328a496 42 return RES_OK;
Sissors 7:da1f3328a496 43 }
Sissors 7:da1f3328a496 44
Sissors 7:da1f3328a496 45 #if _READONLY == 0
Sissors 7:da1f3328a496 46 DRESULT disk_write (
Sissors 7:da1f3328a496 47 BYTE drv, /* Physical drive nmuber (0..) */
Sissors 7:da1f3328a496 48 const BYTE *buff, /* Data to be written */
Sissors 7:da1f3328a496 49 DWORD sector, /* Sector address (LBA) */
Sissors 7:da1f3328a496 50 BYTE count /* Number of sectors to write (1..255) */
Sissors 7:da1f3328a496 51 )
Sissors 7:da1f3328a496 52 {
Sissors 7:da1f3328a496 53 debug_if(FFS_DBG, "disk_write(sector %d, count %d) on drv [%d]\n", sector, count, drv);
Sissors 7:da1f3328a496 54 if (FATFileSystem::_ffs[drv]->disk_write((uint8_t*)buff, sector, count))
Sissors 7:da1f3328a496 55 return RES_PARERR;
Sissors 7:da1f3328a496 56 else
Sissors 7:da1f3328a496 57 return RES_OK;
Sissors 7:da1f3328a496 58 }
Sissors 7:da1f3328a496 59 #endif /* _READONLY */
Sissors 7:da1f3328a496 60
Sissors 7:da1f3328a496 61 DRESULT disk_ioctl (
Sissors 7:da1f3328a496 62 BYTE drv, /* Physical drive nmuber (0..) */
Sissors 7:da1f3328a496 63 BYTE ctrl, /* Control code */
Sissors 7:da1f3328a496 64 void *buff /* Buffer to send/receive control data */
Sissors 7:da1f3328a496 65 )
Sissors 7:da1f3328a496 66 {
Sissors 7:da1f3328a496 67 debug_if(FFS_DBG, "disk_ioctl(%d)\n", ctrl);
Sissors 7:da1f3328a496 68 switch(ctrl) {
Sissors 7:da1f3328a496 69 case CTRL_SYNC:
Sissors 7:da1f3328a496 70 if(FATFileSystem::_ffs[drv] == NULL) {
Sissors 7:da1f3328a496 71 return RES_NOTRDY;
Sissors 7:da1f3328a496 72 } else if(FATFileSystem::_ffs[drv]->disk_sync()) {
Sissors 7:da1f3328a496 73 return RES_ERROR;
Sissors 7:da1f3328a496 74 }
Sissors 7:da1f3328a496 75 return RES_OK;
Sissors 7:da1f3328a496 76 case GET_SECTOR_COUNT:
Sissors 7:da1f3328a496 77 if(FATFileSystem::_ffs[drv] == NULL) {
Sissors 7:da1f3328a496 78 return RES_NOTRDY;
Sissors 7:da1f3328a496 79 } else {
Sissors 7:da1f3328a496 80 DWORD res = FATFileSystem::_ffs[drv]->disk_sectors();
Sissors 7:da1f3328a496 81 if(res > 0) {
Sissors 7:da1f3328a496 82 *((DWORD*)buff) = res; // minimum allowed
Sissors 7:da1f3328a496 83 return RES_OK;
Sissors 7:da1f3328a496 84 } else {
Sissors 7:da1f3328a496 85 return RES_ERROR;
Sissors 7:da1f3328a496 86 }
Sissors 7:da1f3328a496 87 }
Sissors 7:da1f3328a496 88 case GET_BLOCK_SIZE:
Sissors 7:da1f3328a496 89 *((DWORD*)buff) = 1; // default when not known
Sissors 7:da1f3328a496 90 return RES_OK;
Sissors 7:da1f3328a496 91
Sissors 7:da1f3328a496 92 }
Sissors 7:da1f3328a496 93 return RES_PARERR;
Sissors 7:da1f3328a496 94 }