APS Lab / FATFileSystem

No change from original version.

Fork of FATFileSystem by mbed official

ChaN/diskio.cpp@10:f49c186f60d3, 2017-08-18 (annotated)

Committer:
APS_Lab
Date:
Fri Aug 18 05:16:10 2017 +0000
Revision:
10:f49c186f60d3
Parent:
6:a5fcdbf92056 
No change

Who changed what in which revision?

UserRevisionLine numberNew contents of line
emilmont 1:46ce1e16c870 1 /*-----------------------------------------------------------------------*/
mbed_official 6:a5fcdbf92056 2 /* Low level disk I/O module skeleton for FatFs (C)ChaN, 2014 */
emilmont 1:46ce1e16c870 3 /*-----------------------------------------------------------------------*/
mbed_official 6:a5fcdbf92056 4 /* If a working storage control module is available, it should be */
mbed_official 6:a5fcdbf92056 5 /* attached to the FatFs via a glue function rather than modifying it. */
mbed_official 6:a5fcdbf92056 6 /* This is an example of glue functions to attach various exsisting */
mbed_official 6:a5fcdbf92056 7 /* storage control modules to the FatFs module with a defined API. */
emilmont 1:46ce1e16c870 8 /*-----------------------------------------------------------------------*/
mbed_official 6:a5fcdbf92056 9
emilmont 1:46ce1e16c870 10 #include "diskio.h"
emilmont 2:b6669c987c8e 11 #include "mbed_debug.h"
emilmont 1:46ce1e16c870 12 #include "FATFileSystem.h"
emilmont 1:46ce1e16c870 13
emilmont 1:46ce1e16c870 14 using namespace mbed;
emilmont 1:46ce1e16c870 15
mbed_official 6:a5fcdbf92056 16 /*-----------------------------------------------------------------------*/
mbed_official 6:a5fcdbf92056 17 /* Get Drive Status */
mbed_official 6:a5fcdbf92056 18 /*-----------------------------------------------------------------------*/
mbed_official 6:a5fcdbf92056 19
mbed_official 6:a5fcdbf92056 20 DSTATUS disk_status (
mbed_official 6:a5fcdbf92056 21 BYTE pdrv /* Physical drive nmuber to identify the drive */
mbed_official 6:a5fcdbf92056 22 )
mbed_official 6:a5fcdbf92056 23 {
mbed_official 6:a5fcdbf92056 24 debug_if(FFS_DBG, "disk_status on pdrv [%d]\n", pdrv);
mbed_official 6:a5fcdbf92056 25 return (DSTATUS)FATFileSystem::_ffs[pdrv]->disk_status();
mbed_official 6:a5fcdbf92056 26 }
mbed_official 6:a5fcdbf92056 27
mbed_official 6:a5fcdbf92056 28 /*-----------------------------------------------------------------------*/
mbed_official 6:a5fcdbf92056 29 /* Inidialize a Drive */
mbed_official 6:a5fcdbf92056 30 /*-----------------------------------------------------------------------*/
mbed_official 6:a5fcdbf92056 31
emilmont 1:46ce1e16c870 32 DSTATUS disk_initialize (
mbed_official 6:a5fcdbf92056 33 BYTE pdrv /* Physical drive nmuber to identify the drive */
mbed_official 4:3ff2606d5713 34 )
emilmont 1:46ce1e16c870 35 {
mbed_official 5:b3b3370574cf 36 debug_if(FFS_DBG, "disk_initialize on pdrv [%d]\n", pdrv);
mbed_official 5:b3b3370574cf 37 return (DSTATUS)FATFileSystem::_ffs[pdrv]->disk_initialize();
emilmont 1:46ce1e16c870 38 }
emilmont 1:46ce1e16c870 39
mbed_official 6:a5fcdbf92056 40 /*-----------------------------------------------------------------------*/
mbed_official 6:a5fcdbf92056 41 /* Read Sector(s) */
mbed_official 6:a5fcdbf92056 42 /*-----------------------------------------------------------------------*/
emilmont 1:46ce1e16c870 43
emilmont 1:46ce1e16c870 44 DRESULT disk_read (
mbed_official 6:a5fcdbf92056 45 BYTE pdrv, /* Physical drive nmuber to identify the drive */
mbed_official 5:b3b3370574cf 46 BYTE* buff, /* Data buffer to store read data */
mbed_official 6:a5fcdbf92056 47 DWORD sector, /* Sector address in LBA */
mbed_official 6:a5fcdbf92056 48 UINT count /* Number of sectors to read */
emilmont 1:46ce1e16c870 49 )
emilmont 1:46ce1e16c870 50 {
mbed_official 5:b3b3370574cf 51 debug_if(FFS_DBG, "disk_read(sector %d, count %d) on pdrv [%d]\n", sector, count, pdrv);
mbed_official 5:b3b3370574cf 52 if (FATFileSystem::_ffs[pdrv]->disk_read((uint8_t*)buff, sector, count))
mbed_official 4:3ff2606d5713 53 return RES_PARERR;
mbed_official 4:3ff2606d5713 54 else
mbed_official 4:3ff2606d5713 55 return RES_OK;
emilmont 1:46ce1e16c870 56 }
emilmont 1:46ce1e16c870 57
mbed_official 6:a5fcdbf92056 58 /*-----------------------------------------------------------------------*/
mbed_official 6:a5fcdbf92056 59 /* Write Sector(s) */
mbed_official 6:a5fcdbf92056 60 /*-----------------------------------------------------------------------*/
mbed_official 6:a5fcdbf92056 61
mbed_official 6:a5fcdbf92056 62 #if _USE_WRITE
emilmont 1:46ce1e16c870 63 DRESULT disk_write (
mbed_official 6:a5fcdbf92056 64 BYTE pdrv, /* Physical drive nmuber to identify the drive */
mbed_official 5:b3b3370574cf 65 const BYTE* buff, /* Data to be written */
mbed_official 6:a5fcdbf92056 66 DWORD sector, /* Sector address in LBA */
mbed_official 6:a5fcdbf92056 67 UINT count /* Number of sectors to write */
emilmont 1:46ce1e16c870 68 )
emilmont 1:46ce1e16c870 69 {
mbed_official 5:b3b3370574cf 70 debug_if(FFS_DBG, "disk_write(sector %d, count %d) on pdrv [%d]\n", sector, count, pdrv);
mbed_official 5:b3b3370574cf 71 if (FATFileSystem::_ffs[pdrv]->disk_write((uint8_t*)buff, sector, count))
mbed_official 4:3ff2606d5713 72 return RES_PARERR;
mbed_official 4:3ff2606d5713 73 else
mbed_official 4:3ff2606d5713 74 return RES_OK;
emilmont 1:46ce1e16c870 75 }
mbed_official 6:a5fcdbf92056 76 #endif
emilmont 1:46ce1e16c870 77
mbed_official 6:a5fcdbf92056 78 /*-----------------------------------------------------------------------*/
mbed_official 6:a5fcdbf92056 79 /* Miscellaneous Functions */
mbed_official 6:a5fcdbf92056 80 /*-----------------------------------------------------------------------*/
mbed_official 6:a5fcdbf92056 81
mbed_official 6:a5fcdbf92056 82 #if _USE_IOCTL
emilmont 1:46ce1e16c870 83 DRESULT disk_ioctl (
mbed_official 6:a5fcdbf92056 84 BYTE pdrv, /* Physical drive nmuber (0..) */
mbed_official 5:b3b3370574cf 85 BYTE cmd, /* Control code */
mbed_official 5:b3b3370574cf 86 void* buff /* Buffer to send/receive control data */
emilmont 1:46ce1e16c870 87 )
emilmont 1:46ce1e16c870 88 {
mbed_official 5:b3b3370574cf 89 debug_if(FFS_DBG, "disk_ioctl(%d)\n", cmd);
mbed_official 5:b3b3370574cf 90 switch(cmd) {
emilmont 1:46ce1e16c870 91 case CTRL_SYNC:
mbed_official 5:b3b3370574cf 92 if(FATFileSystem::_ffs[pdrv] == NULL) {
emilmont 1:46ce1e16c870 93 return RES_NOTRDY;
mbed_official 5:b3b3370574cf 94 } else if(FATFileSystem::_ffs[pdrv]->disk_sync()) {
emilmont 1:46ce1e16c870 95 return RES_ERROR;
emilmont 1:46ce1e16c870 96 }
emilmont 1:46ce1e16c870 97 return RES_OK;
emilmont 1:46ce1e16c870 98 case GET_SECTOR_COUNT:
mbed_official 5:b3b3370574cf 99 if(FATFileSystem::_ffs[pdrv] == NULL) {
emilmont 1:46ce1e16c870 100 return RES_NOTRDY;
emilmont 1:46ce1e16c870 101 } else {
mbed_official 5:b3b3370574cf 102 DWORD res = FATFileSystem::_ffs[pdrv]->disk_sectors();
emilmont 1:46ce1e16c870 103 if(res > 0) {
emilmont 1:46ce1e16c870 104 *((DWORD*)buff) = res; // minimum allowed
emilmont 1:46ce1e16c870 105 return RES_OK;
emilmont 1:46ce1e16c870 106 } else {
emilmont 1:46ce1e16c870 107 return RES_ERROR;
emilmont 1:46ce1e16c870 108 }
emilmont 1:46ce1e16c870 109 }
emilmont 1:46ce1e16c870 110 case GET_BLOCK_SIZE:
emilmont 1:46ce1e16c870 111 *((DWORD*)buff) = 1; // default when not known
emilmont 1:46ce1e16c870 112 return RES_OK;
emilmont 1:46ce1e16c870 113
emilmont 1:46ce1e16c870 114 }
emilmont 1:46ce1e16c870 115 return RES_PARERR;
emilmont 1:46ce1e16c870 116 }
mbed_official 6:a5fcdbf92056 117 #endif