Ryo Iizuka / NySDFileSystem

This is SDFileSystem which corrected the bug for MiMicSDK.

Dependents:   MbedFileServer_1768MiniDK2 RedWireBridge IssueDebug_gcc MiMicRemoteMCU-for-Mbed ... more

Fork of SDFileSystem by mbed official

FATFileSystem/ChaN/diskio.cpp@9:b2ca0e66c1f7, 2013-11-12 (annotated)

Committer:
nyatla
Date:
Tue Nov 12 03:41:14 2013 +0000
Revision:
9:b2ca0e66c1f7
Parent:
8:22ce3449b224 
fix warning.;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
nyatla 5:2c7b6bd5b079 1 /*-----------------------------------------------------------------------*/
nyatla 5:2c7b6bd5b079 2 /* Low level disk I/O module skeleton for FatFs (C)ChaN, 2007 */
nyatla 5:2c7b6bd5b079 3 /*-----------------------------------------------------------------------*/
nyatla 5:2c7b6bd5b079 4 /* This is a stub disk I/O module that acts as front end of the existing */
nyatla 5:2c7b6bd5b079 5 /* disk I/O modules and attach it to FatFs module with common interface. */
nyatla 5:2c7b6bd5b079 6 /*-----------------------------------------------------------------------*/
nyatla 5:2c7b6bd5b079 7 #include "ffconf.h"
nyatla 5:2c7b6bd5b079 8 #include "diskio.h"
nyatla 5:2c7b6bd5b079 9
nyatla 5:2c7b6bd5b079 10 #include "FATFileSystem.h"
nyatla 5:2c7b6bd5b079 11
nyatla 7:5429e81addde 12
nyatla 5:2c7b6bd5b079 13 using namespace mbed;
nyatla 5:2c7b6bd5b079 14
nyatla 5:2c7b6bd5b079 15 DSTATUS disk_initialize (
nyatla 5:2c7b6bd5b079 16 BYTE drv /* Physical drive nmuber (0..) */
nyatla 5:2c7b6bd5b079 17 )
nyatla 5:2c7b6bd5b079 18 {
nyatla 5:2c7b6bd5b079 19 return (DSTATUS)FATFileSystem::_ffs[drv]->disk_initialize();
nyatla 5:2c7b6bd5b079 20 }
nyatla 5:2c7b6bd5b079 21
nyatla 5:2c7b6bd5b079 22 DSTATUS disk_status (
nyatla 5:2c7b6bd5b079 23 BYTE drv /* Physical drive nmuber (0..) */
nyatla 5:2c7b6bd5b079 24 )
nyatla 5:2c7b6bd5b079 25 {
nyatla 5:2c7b6bd5b079 26 return (DSTATUS)FATFileSystem::_ffs[drv]->disk_status();
nyatla 5:2c7b6bd5b079 27 }
nyatla 5:2c7b6bd5b079 28
nyatla 5:2c7b6bd5b079 29 DRESULT disk_read (
nyatla 5:2c7b6bd5b079 30 BYTE drv, /* Physical drive nmuber (0..) */
nyatla 5:2c7b6bd5b079 31 BYTE *buff, /* Data buffer to store read data */
nyatla 5:2c7b6bd5b079 32 DWORD sector, /* Sector address (LBA) */
nyatla 5:2c7b6bd5b079 33 BYTE count /* Number of sectors to read (1..255) */
nyatla 5:2c7b6bd5b079 34 )
nyatla 5:2c7b6bd5b079 35 {
nyatla 5:2c7b6bd5b079 36 for(DWORD s=sector; s<sector+count; s++) {
nyatla 5:2c7b6bd5b079 37 int res = FATFileSystem::_ffs[drv]->disk_read((uint8_t*)buff, s);
nyatla 5:2c7b6bd5b079 38 if(res) {
nyatla 5:2c7b6bd5b079 39 return RES_PARERR;
nyatla 5:2c7b6bd5b079 40 }
nyatla 5:2c7b6bd5b079 41 buff += 512;
nyatla 5:2c7b6bd5b079 42 }
nyatla 5:2c7b6bd5b079 43 return RES_OK;
nyatla 5:2c7b6bd5b079 44 }
nyatla 5:2c7b6bd5b079 45
nyatla 5:2c7b6bd5b079 46 #if _READONLY == 0
nyatla 5:2c7b6bd5b079 47 DRESULT disk_write (
nyatla 5:2c7b6bd5b079 48 BYTE drv, /* Physical drive nmuber (0..) */
nyatla 5:2c7b6bd5b079 49 const BYTE *buff, /* Data to be written */
nyatla 5:2c7b6bd5b079 50 DWORD sector, /* Sector address (LBA) */
nyatla 5:2c7b6bd5b079 51 BYTE count /* Number of sectors to write (1..255) */
nyatla 5:2c7b6bd5b079 52 )
nyatla 5:2c7b6bd5b079 53 {
nyatla 5:2c7b6bd5b079 54 for(DWORD s = sector; s < sector + count; s++) {
nyatla 5:2c7b6bd5b079 55 int res = FATFileSystem::_ffs[drv]->disk_write((uint8_t*)buff, s);
nyatla 5:2c7b6bd5b079 56 if(res) {
nyatla 5:2c7b6bd5b079 57 return RES_PARERR;
nyatla 5:2c7b6bd5b079 58 }
nyatla 5:2c7b6bd5b079 59 buff += 512;
nyatla 5:2c7b6bd5b079 60 }
nyatla 5:2c7b6bd5b079 61 return RES_OK;
nyatla 5:2c7b6bd5b079 62 }
nyatla 5:2c7b6bd5b079 63 #endif /* _READONLY */
nyatla 5:2c7b6bd5b079 64
nyatla 5:2c7b6bd5b079 65 DRESULT disk_ioctl (
nyatla 5:2c7b6bd5b079 66 BYTE drv, /* Physical drive nmuber (0..) */
nyatla 5:2c7b6bd5b079 67 BYTE ctrl, /* Control code */
nyatla 5:2c7b6bd5b079 68 void *buff /* Buffer to send/receive control data */
nyatla 5:2c7b6bd5b079 69 )
nyatla 5:2c7b6bd5b079 70 {
nyatla 5:2c7b6bd5b079 71 switch(ctrl) {
nyatla 5:2c7b6bd5b079 72 case CTRL_SYNC:
nyatla 5:2c7b6bd5b079 73 if(FATFileSystem::_ffs[drv] == NULL) {
nyatla 5:2c7b6bd5b079 74 return RES_NOTRDY;
nyatla 5:2c7b6bd5b079 75 } else if(FATFileSystem::_ffs[drv]->disk_sync()) {
nyatla 5:2c7b6bd5b079 76 return RES_ERROR;
nyatla 5:2c7b6bd5b079 77 }
nyatla 5:2c7b6bd5b079 78 return RES_OK;
nyatla 5:2c7b6bd5b079 79 case GET_SECTOR_COUNT:
nyatla 5:2c7b6bd5b079 80 if(FATFileSystem::_ffs[drv] == NULL) {
nyatla 5:2c7b6bd5b079 81 return RES_NOTRDY;
nyatla 5:2c7b6bd5b079 82 } else {
nyatla 5:2c7b6bd5b079 83 DWORD res = FATFileSystem::_ffs[drv]->disk_sectors();
nyatla 5:2c7b6bd5b079 84 if(res > 0) {
nyatla 5:2c7b6bd5b079 85 *((DWORD*)buff) = res; // minimum allowed
nyatla 5:2c7b6bd5b079 86 return RES_OK;
nyatla 5:2c7b6bd5b079 87 } else {
nyatla 5:2c7b6bd5b079 88 return RES_ERROR;
nyatla 5:2c7b6bd5b079 89 }
nyatla 5:2c7b6bd5b079 90 }
nyatla 5:2c7b6bd5b079 91 case GET_BLOCK_SIZE:
nyatla 5:2c7b6bd5b079 92 *((DWORD*)buff) = 1; // default when not known
nyatla 5:2c7b6bd5b079 93 return RES_OK;
nyatla 5:2c7b6bd5b079 94
nyatla 5:2c7b6bd5b079 95 }
nyatla 5:2c7b6bd5b079 96 return RES_PARERR;
nyatla 5:2c7b6bd5b079 97 }