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Dependencies:   4DGL-uLCD-SE mbed wave_player

Fork of missile_command by ECE 2035 TA

SDFileSystem/FATFileSystem/ChaN/diskio.cpp@2:5e7876719560, 2014-11-12 (annotated)

Committer:
arvahsu
Date:
Wed Nov 12 02:06:48 2014 +0000
Revision:
2:5e7876719560
Copy the SDFileSystem library due to the original author stop sharing the library.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
arvahsu 2:5e7876719560 1 /*-----------------------------------------------------------------------*/
arvahsu 2:5e7876719560 2 /* Low level disk I/O module skeleton for FatFs (C)ChaN, 2007 */
arvahsu 2:5e7876719560 3 /*-----------------------------------------------------------------------*/
arvahsu 2:5e7876719560 4 /* This is a stub disk I/O module that acts as front end of the existing */
arvahsu 2:5e7876719560 5 /* disk I/O modules and attach it to FatFs module with common interface. */
arvahsu 2:5e7876719560 6 /*-----------------------------------------------------------------------*/
arvahsu 2:5e7876719560 7 #include "ffconf.h"
arvahsu 2:5e7876719560 8 #include "diskio.h"
arvahsu 2:5e7876719560 9
arvahsu 2:5e7876719560 10 #include "mbed_debug.h"
arvahsu 2:5e7876719560 11 #include "FATFileSystem.h"
arvahsu 2:5e7876719560 12
arvahsu 2:5e7876719560 13 using namespace mbed;
arvahsu 2:5e7876719560 14
arvahsu 2:5e7876719560 15 DSTATUS disk_initialize (
arvahsu 2:5e7876719560 16 BYTE drv /* Physical drive nmuber (0..) */
arvahsu 2:5e7876719560 17 )
arvahsu 2:5e7876719560 18 {
arvahsu 2:5e7876719560 19 debug_if(FFS_DBG, "disk_initialize on drv [%d]\n", drv);
arvahsu 2:5e7876719560 20 return (DSTATUS)FATFileSystem::_ffs[drv]->disk_initialize();
arvahsu 2:5e7876719560 21 }
arvahsu 2:5e7876719560 22
arvahsu 2:5e7876719560 23 DSTATUS disk_status (
arvahsu 2:5e7876719560 24 BYTE drv /* Physical drive nmuber (0..) */
arvahsu 2:5e7876719560 25 )
arvahsu 2:5e7876719560 26 {
arvahsu 2:5e7876719560 27 debug_if(FFS_DBG, "disk_status on drv [%d]\n", drv);
arvahsu 2:5e7876719560 28 return (DSTATUS)FATFileSystem::_ffs[drv]->disk_status();
arvahsu 2:5e7876719560 29 }
arvahsu 2:5e7876719560 30
arvahsu 2:5e7876719560 31 DRESULT disk_read (
arvahsu 2:5e7876719560 32 BYTE drv, /* Physical drive nmuber (0..) */
arvahsu 2:5e7876719560 33 BYTE *buff, /* Data buffer to store read data */
arvahsu 2:5e7876719560 34 DWORD sector, /* Sector address (LBA) */
arvahsu 2:5e7876719560 35 BYTE count /* Number of sectors to read (1..255) */
arvahsu 2:5e7876719560 36 )
arvahsu 2:5e7876719560 37 {
arvahsu 2:5e7876719560 38 debug_if(FFS_DBG, "disk_read(sector %d, count %d) on drv [%d]\n", sector, count, drv);
arvahsu 2:5e7876719560 39 for(DWORD s=sector; s<sector+count; s++) {
arvahsu 2:5e7876719560 40 debug_if(FFS_DBG, " disk_read(sector %d)\n", s);
arvahsu 2:5e7876719560 41 int res = FATFileSystem::_ffs[drv]->disk_read((uint8_t*)buff, s);
arvahsu 2:5e7876719560 42 if(res) {
arvahsu 2:5e7876719560 43 return RES_PARERR;
arvahsu 2:5e7876719560 44 }
arvahsu 2:5e7876719560 45 buff += 512;
arvahsu 2:5e7876719560 46 }
arvahsu 2:5e7876719560 47 return RES_OK;
arvahsu 2:5e7876719560 48 }
arvahsu 2:5e7876719560 49
arvahsu 2:5e7876719560 50 #if _READONLY == 0
arvahsu 2:5e7876719560 51 DRESULT disk_write (
arvahsu 2:5e7876719560 52 BYTE drv, /* Physical drive nmuber (0..) */
arvahsu 2:5e7876719560 53 const BYTE *buff, /* Data to be written */
arvahsu 2:5e7876719560 54 DWORD sector, /* Sector address (LBA) */
arvahsu 2:5e7876719560 55 BYTE count /* Number of sectors to write (1..255) */
arvahsu 2:5e7876719560 56 )
arvahsu 2:5e7876719560 57 {
arvahsu 2:5e7876719560 58 debug_if(FFS_DBG, "disk_write(sector %d, count %d) on drv [%d]\n", sector, count, drv);
arvahsu 2:5e7876719560 59 for(DWORD s = sector; s < sector + count; s++) {
arvahsu 2:5e7876719560 60 debug_if(FFS_DBG, " disk_write(sector %d)\n", s);
arvahsu 2:5e7876719560 61 int res = FATFileSystem::_ffs[drv]->disk_write((uint8_t*)buff, s);
arvahsu 2:5e7876719560 62 if(res) {
arvahsu 2:5e7876719560 63 return RES_PARERR;
arvahsu 2:5e7876719560 64 }
arvahsu 2:5e7876719560 65 buff += 512;
arvahsu 2:5e7876719560 66 }
arvahsu 2:5e7876719560 67 return RES_OK;
arvahsu 2:5e7876719560 68 }
arvahsu 2:5e7876719560 69 #endif /* _READONLY */
arvahsu 2:5e7876719560 70
arvahsu 2:5e7876719560 71 DRESULT disk_ioctl (
arvahsu 2:5e7876719560 72 BYTE drv, /* Physical drive nmuber (0..) */
arvahsu 2:5e7876719560 73 BYTE ctrl, /* Control code */
arvahsu 2:5e7876719560 74 void *buff /* Buffer to send/receive control data */
arvahsu 2:5e7876719560 75 )
arvahsu 2:5e7876719560 76 {
arvahsu 2:5e7876719560 77 debug_if(FFS_DBG, "disk_ioctl(%d)\n", ctrl);
arvahsu 2:5e7876719560 78 switch(ctrl) {
arvahsu 2:5e7876719560 79 case CTRL_SYNC:
arvahsu 2:5e7876719560 80 if(FATFileSystem::_ffs[drv] == NULL) {
arvahsu 2:5e7876719560 81 return RES_NOTRDY;
arvahsu 2:5e7876719560 82 } else if(FATFileSystem::_ffs[drv]->disk_sync()) {
arvahsu 2:5e7876719560 83 return RES_ERROR;
arvahsu 2:5e7876719560 84 }
arvahsu 2:5e7876719560 85 return RES_OK;
arvahsu 2:5e7876719560 86 case GET_SECTOR_COUNT:
arvahsu 2:5e7876719560 87 if(FATFileSystem::_ffs[drv] == NULL) {
arvahsu 2:5e7876719560 88 return RES_NOTRDY;
arvahsu 2:5e7876719560 89 } else {
arvahsu 2:5e7876719560 90 DWORD res = FATFileSystem::_ffs[drv]->disk_sectors();
arvahsu 2:5e7876719560 91 if(res > 0) {
arvahsu 2:5e7876719560 92 *((DWORD*)buff) = res; // minimum allowed
arvahsu 2:5e7876719560 93 return RES_OK;
arvahsu 2:5e7876719560 94 } else {
arvahsu 2:5e7876719560 95 return RES_ERROR;
arvahsu 2:5e7876719560 96 }
arvahsu 2:5e7876719560 97 }
arvahsu 2:5e7876719560 98 case GET_BLOCK_SIZE:
arvahsu 2:5e7876719560 99 *((DWORD*)buff) = 1; // default when not known
arvahsu 2:5e7876719560 100 return RES_OK;
arvahsu 2:5e7876719560 101
arvahsu 2:5e7876719560 102 }
arvahsu 2:5e7876719560 103 return RES_PARERR;
arvahsu 2:5e7876719560 104 }