SDFileSystem Library
Dependents: ECE2035_SUM17_Project
FATFileSystem/ChaN/diskio.cpp@0:71be9322f4eb, 2017-07-14 (annotated)
- Committer:
- kennyainny
- Date:
- Fri Jul 14 21:42:13 2017 +0000
- Revision:
- 0:71be9322f4eb
no changes
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
kennyainny | 0:71be9322f4eb | 1 | /*-----------------------------------------------------------------------*/ |
kennyainny | 0:71be9322f4eb | 2 | /* Low level disk I/O module skeleton for FatFs (C)ChaN, 2007 */ |
kennyainny | 0:71be9322f4eb | 3 | /*-----------------------------------------------------------------------*/ |
kennyainny | 0:71be9322f4eb | 4 | /* This is a stub disk I/O module that acts as front end of the existing */ |
kennyainny | 0:71be9322f4eb | 5 | /* disk I/O modules and attach it to FatFs module with common interface. */ |
kennyainny | 0:71be9322f4eb | 6 | /*-----------------------------------------------------------------------*/ |
kennyainny | 0:71be9322f4eb | 7 | #include "ffconf.h" |
kennyainny | 0:71be9322f4eb | 8 | #include "diskio.h" |
kennyainny | 0:71be9322f4eb | 9 | |
kennyainny | 0:71be9322f4eb | 10 | #include "mbed_debug.h" |
kennyainny | 0:71be9322f4eb | 11 | #include "FATFileSystem.h" |
kennyainny | 0:71be9322f4eb | 12 | |
kennyainny | 0:71be9322f4eb | 13 | using namespace mbed; |
kennyainny | 0:71be9322f4eb | 14 | |
kennyainny | 0:71be9322f4eb | 15 | DSTATUS disk_initialize ( |
kennyainny | 0:71be9322f4eb | 16 | BYTE drv /* Physical drive nmuber (0..) */ |
kennyainny | 0:71be9322f4eb | 17 | ) |
kennyainny | 0:71be9322f4eb | 18 | { |
kennyainny | 0:71be9322f4eb | 19 | debug_if(FFS_DBG, "disk_initialize on drv [%d]\n", drv); |
kennyainny | 0:71be9322f4eb | 20 | return (DSTATUS)FATFileSystem::_ffs[drv]->disk_initialize(); |
kennyainny | 0:71be9322f4eb | 21 | } |
kennyainny | 0:71be9322f4eb | 22 | |
kennyainny | 0:71be9322f4eb | 23 | DSTATUS disk_status ( |
kennyainny | 0:71be9322f4eb | 24 | BYTE drv /* Physical drive nmuber (0..) */ |
kennyainny | 0:71be9322f4eb | 25 | ) |
kennyainny | 0:71be9322f4eb | 26 | { |
kennyainny | 0:71be9322f4eb | 27 | debug_if(FFS_DBG, "disk_status on drv [%d]\n", drv); |
kennyainny | 0:71be9322f4eb | 28 | return (DSTATUS)FATFileSystem::_ffs[drv]->disk_status(); |
kennyainny | 0:71be9322f4eb | 29 | } |
kennyainny | 0:71be9322f4eb | 30 | |
kennyainny | 0:71be9322f4eb | 31 | DRESULT disk_read ( |
kennyainny | 0:71be9322f4eb | 32 | BYTE drv, /* Physical drive nmuber (0..) */ |
kennyainny | 0:71be9322f4eb | 33 | BYTE *buff, /* Data buffer to store read data */ |
kennyainny | 0:71be9322f4eb | 34 | DWORD sector, /* Sector address (LBA) */ |
kennyainny | 0:71be9322f4eb | 35 | BYTE count /* Number of sectors to read (1..255) */ |
kennyainny | 0:71be9322f4eb | 36 | ) |
kennyainny | 0:71be9322f4eb | 37 | { |
kennyainny | 0:71be9322f4eb | 38 | debug_if(FFS_DBG, "disk_read(sector %d, count %d) on drv [%d]\n", sector, count, drv); |
kennyainny | 0:71be9322f4eb | 39 | for(DWORD s=sector; s<sector+count; s++) { |
kennyainny | 0:71be9322f4eb | 40 | debug_if(FFS_DBG, " disk_read(sector %d)\n", s); |
kennyainny | 0:71be9322f4eb | 41 | int res = FATFileSystem::_ffs[drv]->disk_read((uint8_t*)buff, s); |
kennyainny | 0:71be9322f4eb | 42 | if(res) { |
kennyainny | 0:71be9322f4eb | 43 | return RES_PARERR; |
kennyainny | 0:71be9322f4eb | 44 | } |
kennyainny | 0:71be9322f4eb | 45 | buff += 512; |
kennyainny | 0:71be9322f4eb | 46 | } |
kennyainny | 0:71be9322f4eb | 47 | return RES_OK; |
kennyainny | 0:71be9322f4eb | 48 | } |
kennyainny | 0:71be9322f4eb | 49 | |
kennyainny | 0:71be9322f4eb | 50 | #if _READONLY == 0 |
kennyainny | 0:71be9322f4eb | 51 | DRESULT disk_write ( |
kennyainny | 0:71be9322f4eb | 52 | BYTE drv, /* Physical drive nmuber (0..) */ |
kennyainny | 0:71be9322f4eb | 53 | const BYTE *buff, /* Data to be written */ |
kennyainny | 0:71be9322f4eb | 54 | DWORD sector, /* Sector address (LBA) */ |
kennyainny | 0:71be9322f4eb | 55 | BYTE count /* Number of sectors to write (1..255) */ |
kennyainny | 0:71be9322f4eb | 56 | ) |
kennyainny | 0:71be9322f4eb | 57 | { |
kennyainny | 0:71be9322f4eb | 58 | debug_if(FFS_DBG, "disk_write(sector %d, count %d) on drv [%d]\n", sector, count, drv); |
kennyainny | 0:71be9322f4eb | 59 | for(DWORD s = sector; s < sector + count; s++) { |
kennyainny | 0:71be9322f4eb | 60 | debug_if(FFS_DBG, " disk_write(sector %d)\n", s); |
kennyainny | 0:71be9322f4eb | 61 | int res = FATFileSystem::_ffs[drv]->disk_write((uint8_t*)buff, s); |
kennyainny | 0:71be9322f4eb | 62 | if(res) { |
kennyainny | 0:71be9322f4eb | 63 | return RES_PARERR; |
kennyainny | 0:71be9322f4eb | 64 | } |
kennyainny | 0:71be9322f4eb | 65 | buff += 512; |
kennyainny | 0:71be9322f4eb | 66 | } |
kennyainny | 0:71be9322f4eb | 67 | return RES_OK; |
kennyainny | 0:71be9322f4eb | 68 | } |
kennyainny | 0:71be9322f4eb | 69 | #endif /* _READONLY */ |
kennyainny | 0:71be9322f4eb | 70 | |
kennyainny | 0:71be9322f4eb | 71 | DRESULT disk_ioctl ( |
kennyainny | 0:71be9322f4eb | 72 | BYTE drv, /* Physical drive nmuber (0..) */ |
kennyainny | 0:71be9322f4eb | 73 | BYTE ctrl, /* Control code */ |
kennyainny | 0:71be9322f4eb | 74 | void *buff /* Buffer to send/receive control data */ |
kennyainny | 0:71be9322f4eb | 75 | ) |
kennyainny | 0:71be9322f4eb | 76 | { |
kennyainny | 0:71be9322f4eb | 77 | debug_if(FFS_DBG, "disk_ioctl(%d)\n", ctrl); |
kennyainny | 0:71be9322f4eb | 78 | switch(ctrl) { |
kennyainny | 0:71be9322f4eb | 79 | case CTRL_SYNC: |
kennyainny | 0:71be9322f4eb | 80 | if(FATFileSystem::_ffs[drv] == NULL) { |
kennyainny | 0:71be9322f4eb | 81 | return RES_NOTRDY; |
kennyainny | 0:71be9322f4eb | 82 | } else if(FATFileSystem::_ffs[drv]->disk_sync()) { |
kennyainny | 0:71be9322f4eb | 83 | return RES_ERROR; |
kennyainny | 0:71be9322f4eb | 84 | } |
kennyainny | 0:71be9322f4eb | 85 | return RES_OK; |
kennyainny | 0:71be9322f4eb | 86 | case GET_SECTOR_COUNT: |
kennyainny | 0:71be9322f4eb | 87 | if(FATFileSystem::_ffs[drv] == NULL) { |
kennyainny | 0:71be9322f4eb | 88 | return RES_NOTRDY; |
kennyainny | 0:71be9322f4eb | 89 | } else { |
kennyainny | 0:71be9322f4eb | 90 | DWORD res = FATFileSystem::_ffs[drv]->disk_sectors(); |
kennyainny | 0:71be9322f4eb | 91 | if(res > 0) { |
kennyainny | 0:71be9322f4eb | 92 | *((DWORD*)buff) = res; // minimum allowed |
kennyainny | 0:71be9322f4eb | 93 | return RES_OK; |
kennyainny | 0:71be9322f4eb | 94 | } else { |
kennyainny | 0:71be9322f4eb | 95 | return RES_ERROR; |
kennyainny | 0:71be9322f4eb | 96 | } |
kennyainny | 0:71be9322f4eb | 97 | } |
kennyainny | 0:71be9322f4eb | 98 | case GET_BLOCK_SIZE: |
kennyainny | 0:71be9322f4eb | 99 | *((DWORD*)buff) = 1; // default when not known |
kennyainny | 0:71be9322f4eb | 100 | return RES_OK; |
kennyainny | 0:71be9322f4eb | 101 | |
kennyainny | 0:71be9322f4eb | 102 | } |
kennyainny | 0:71be9322f4eb | 103 | return RES_PARERR; |
kennyainny | 0:71be9322f4eb | 104 | } |