Joerg Schmalzl / USBHost_DISCO-F746NG_joerg

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Fork of USBHost_DISCO-F746NG by Dieter Graef

FATFileSystem/ChaN/diskio.cpp@26:49c13dfc95d0, 2016-11-30 (annotated)

Committer:
schmalzl
Date:
Wed Nov 30 10:51:48 2016 +0000
Revision:
26:49c13dfc95d0
Parent:
24:5396b6a93262 
Turbo Ede v1

Who changed what in which revision?

UserRevisionLine numberNew contents of line
DieterGraef 24:5396b6a93262 1 /*-----------------------------------------------------------------------*/
DieterGraef 24:5396b6a93262 2 /* Low level disk I/O module skeleton for FatFs (C)ChaN, 2007 */
DieterGraef 24:5396b6a93262 3 /*-----------------------------------------------------------------------*/
DieterGraef 24:5396b6a93262 4 /* This is a stub disk I/O module that acts as front end of the existing */
DieterGraef 24:5396b6a93262 5 /* disk I/O modules and attach it to FatFs module with common interface. */
DieterGraef 24:5396b6a93262 6 /*-----------------------------------------------------------------------*/
DieterGraef 24:5396b6a93262 7 #include "ffconf.h"
DieterGraef 24:5396b6a93262 8 #include "diskio.h"
DieterGraef 24:5396b6a93262 9
DieterGraef 24:5396b6a93262 10 #include "mbed_debug.h"
DieterGraef 24:5396b6a93262 11 #include "FATFileSystem.h"
DieterGraef 24:5396b6a93262 12
DieterGraef 24:5396b6a93262 13 using namespace mbed;
DieterGraef 24:5396b6a93262 14
DieterGraef 24:5396b6a93262 15 DSTATUS disk_initialize (
DieterGraef 24:5396b6a93262 16 BYTE pdrv /* Physical drive number (0..) */
DieterGraef 24:5396b6a93262 17 )
DieterGraef 24:5396b6a93262 18 {
DieterGraef 24:5396b6a93262 19 debug_if(FFS_DBG, "disk_initialize on pdrv [%d]\n", pdrv);
DieterGraef 24:5396b6a93262 20 return (DSTATUS)FATFileSystem::_ffs[pdrv]->disk_initialize();
DieterGraef 24:5396b6a93262 21 }
DieterGraef 24:5396b6a93262 22
DieterGraef 24:5396b6a93262 23 DSTATUS disk_status (
DieterGraef 24:5396b6a93262 24 BYTE pdrv /* Physical drive number (0..) */
DieterGraef 24:5396b6a93262 25 )
DieterGraef 24:5396b6a93262 26 {
DieterGraef 24:5396b6a93262 27 debug_if(FFS_DBG, "disk_status on pdrv [%d]\n", pdrv);
DieterGraef 24:5396b6a93262 28 return (DSTATUS)FATFileSystem::_ffs[pdrv]->disk_status();
DieterGraef 24:5396b6a93262 29 }
DieterGraef 24:5396b6a93262 30
DieterGraef 24:5396b6a93262 31 DRESULT disk_read (
DieterGraef 24:5396b6a93262 32 BYTE pdrv, /* Physical drive number (0..) */
DieterGraef 24:5396b6a93262 33 BYTE* buff, /* Data buffer to store read data */
DieterGraef 24:5396b6a93262 34 DWORD sector, /* Sector address (LBA) */
DieterGraef 24:5396b6a93262 35 UINT count /* Number of sectors to read (1..) */
DieterGraef 24:5396b6a93262 36 )
DieterGraef 24:5396b6a93262 37 {
DieterGraef 24:5396b6a93262 38 debug_if(FFS_DBG, "disk_read(sector %d, count %d) on pdrv [%d]\n", sector, count, pdrv);
DieterGraef 24:5396b6a93262 39 if (FATFileSystem::_ffs[pdrv]->disk_read((uint8_t*)buff, sector, count))
DieterGraef 24:5396b6a93262 40 return RES_PARERR;
DieterGraef 24:5396b6a93262 41 else
DieterGraef 24:5396b6a93262 42 return RES_OK;
DieterGraef 24:5396b6a93262 43 }
DieterGraef 24:5396b6a93262 44
DieterGraef 24:5396b6a93262 45 #if _READONLY == 0
DieterGraef 24:5396b6a93262 46 DRESULT disk_write (
DieterGraef 24:5396b6a93262 47 BYTE pdrv, /* Physical drive number (0..) */
DieterGraef 24:5396b6a93262 48 const BYTE* buff, /* Data to be written */
DieterGraef 24:5396b6a93262 49 DWORD sector, /* Sector address (LBA) */
DieterGraef 24:5396b6a93262 50 UINT count /* Number of sectors to write (1..) */
DieterGraef 24:5396b6a93262 51 )
DieterGraef 24:5396b6a93262 52 {
DieterGraef 24:5396b6a93262 53 debug_if(FFS_DBG, "disk_write(sector %d, count %d) on pdrv [%d]\n", sector, count, pdrv);
DieterGraef 24:5396b6a93262 54 if (FATFileSystem::_ffs[pdrv]->disk_write((uint8_t*)buff, sector, count))
DieterGraef 24:5396b6a93262 55 return RES_PARERR;
DieterGraef 24:5396b6a93262 56 else
DieterGraef 24:5396b6a93262 57 return RES_OK;
DieterGraef 24:5396b6a93262 58 }
DieterGraef 24:5396b6a93262 59 #endif /* _READONLY */
DieterGraef 24:5396b6a93262 60
DieterGraef 24:5396b6a93262 61 DRESULT disk_ioctl (
DieterGraef 24:5396b6a93262 62 BYTE pdrv, /* Physical drive number (0..) */
DieterGraef 24:5396b6a93262 63 BYTE cmd, /* Control code */
DieterGraef 24:5396b6a93262 64 void* buff /* Buffer to send/receive control data */
DieterGraef 24:5396b6a93262 65 )
DieterGraef 24:5396b6a93262 66 {
DieterGraef 24:5396b6a93262 67 debug_if(FFS_DBG, "disk_ioctl(%d)\n", cmd);
DieterGraef 24:5396b6a93262 68 switch(cmd) {
DieterGraef 24:5396b6a93262 69 case CTRL_SYNC:
DieterGraef 24:5396b6a93262 70 if(FATFileSystem::_ffs[pdrv] == NULL) {
DieterGraef 24:5396b6a93262 71 return RES_NOTRDY;
DieterGraef 24:5396b6a93262 72 } else if(FATFileSystem::_ffs[pdrv]->disk_sync()) {
DieterGraef 24:5396b6a93262 73 return RES_ERROR;
DieterGraef 24:5396b6a93262 74 }
DieterGraef 24:5396b6a93262 75 return RES_OK;
DieterGraef 24:5396b6a93262 76 case GET_SECTOR_COUNT:
DieterGraef 24:5396b6a93262 77 if(FATFileSystem::_ffs[pdrv] == NULL) {
DieterGraef 24:5396b6a93262 78 return RES_NOTRDY;
DieterGraef 24:5396b6a93262 79 } else {
DieterGraef 24:5396b6a93262 80 DWORD res = FATFileSystem::_ffs[pdrv]->disk_sectors();
DieterGraef 24:5396b6a93262 81 if(res > 0) {
DieterGraef 24:5396b6a93262 82 *((DWORD*)buff) = res; // minimum allowed
DieterGraef 24:5396b6a93262 83 return RES_OK;
DieterGraef 24:5396b6a93262 84 } else {
DieterGraef 24:5396b6a93262 85 return RES_ERROR;
DieterGraef 24:5396b6a93262 86 }
DieterGraef 24:5396b6a93262 87 }
DieterGraef 24:5396b6a93262 88 case GET_BLOCK_SIZE:
DieterGraef 24:5396b6a93262 89 *((DWORD*)buff) = 1; // default when not known
DieterGraef 24:5396b6a93262 90 return RES_OK;
DieterGraef 24:5396b6a93262 91
DieterGraef 24:5396b6a93262 92 }
DieterGraef 24:5396b6a93262 93 return RES_PARERR;
DieterGraef 24:5396b6a93262 94 }