forked version of FATFileSystemEx
Fork of FATFileSystem by
FATFileSystem.cpp@4:c9dcfcfd0c5a, 2014-08-20 (annotated)
- Committer:
- bkc_mbed
- Date:
- Wed Aug 20 00:20:41 2014 +0000
- Revision:
- 4:c9dcfcfd0c5a
- Parent:
- 2:b6669c987c8e
added tiny mode
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
emilmont | 1:46ce1e16c870 | 1 | /* mbed Microcontroller Library |
emilmont | 1:46ce1e16c870 | 2 | * Copyright (c) 2006-2012 ARM Limited |
emilmont | 1:46ce1e16c870 | 3 | * |
emilmont | 1:46ce1e16c870 | 4 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
emilmont | 1:46ce1e16c870 | 5 | * of this software and associated documentation files (the "Software"), to deal |
emilmont | 1:46ce1e16c870 | 6 | * in the Software without restriction, including without limitation the rights |
emilmont | 1:46ce1e16c870 | 7 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
emilmont | 1:46ce1e16c870 | 8 | * copies of the Software, and to permit persons to whom the Software is |
emilmont | 1:46ce1e16c870 | 9 | * furnished to do so, subject to the following conditions: |
emilmont | 1:46ce1e16c870 | 10 | * |
emilmont | 1:46ce1e16c870 | 11 | * The above copyright notice and this permission notice shall be included in |
emilmont | 1:46ce1e16c870 | 12 | * all copies or substantial portions of the Software. |
emilmont | 1:46ce1e16c870 | 13 | * |
emilmont | 1:46ce1e16c870 | 14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
emilmont | 1:46ce1e16c870 | 15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
emilmont | 1:46ce1e16c870 | 16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
emilmont | 1:46ce1e16c870 | 17 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
emilmont | 1:46ce1e16c870 | 18 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
emilmont | 1:46ce1e16c870 | 19 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
emilmont | 1:46ce1e16c870 | 20 | * SOFTWARE. |
emilmont | 1:46ce1e16c870 | 21 | */ |
emilmont | 1:46ce1e16c870 | 22 | #include "mbed.h" |
emilmont | 1:46ce1e16c870 | 23 | |
emilmont | 1:46ce1e16c870 | 24 | #include "ffconf.h" |
emilmont | 2:b6669c987c8e | 25 | #include "mbed_debug.h" |
emilmont | 1:46ce1e16c870 | 26 | |
emilmont | 1:46ce1e16c870 | 27 | #include "FATFileSystem.h" |
emilmont | 1:46ce1e16c870 | 28 | #include "FATFileHandle.h" |
emilmont | 1:46ce1e16c870 | 29 | #include "FATDirHandle.h" |
emilmont | 1:46ce1e16c870 | 30 | |
bkc_mbed | 4:c9dcfcfd0c5a | 31 | #ifdef FAT_TINY |
bkc_mbed | 4:c9dcfcfd0c5a | 32 | #define FA_RDWR FA_READ |
bkc_mbed | 4:c9dcfcfd0c5a | 33 | #define FA_WRITE FA_READ |
bkc_mbed | 4:c9dcfcfd0c5a | 34 | #define FA_CREATE_ALWAYS 0 |
bkc_mbed | 4:c9dcfcfd0c5a | 35 | #define FA_OPEN_ALWAYS 0 |
bkc_mbed | 4:c9dcfcfd0c5a | 36 | #else |
bkc_mbed | 4:c9dcfcfd0c5a | 37 | #define FA_RDWR (FA_READ|FA_WRITE) |
bkc_mbed | 4:c9dcfcfd0c5a | 38 | #endif |
bkc_mbed | 4:c9dcfcfd0c5a | 39 | |
bkc_mbed | 4:c9dcfcfd0c5a | 40 | |
emilmont | 1:46ce1e16c870 | 41 | DWORD get_fattime(void) { |
emilmont | 1:46ce1e16c870 | 42 | time_t rawtime; |
emilmont | 1:46ce1e16c870 | 43 | time(&rawtime); |
emilmont | 1:46ce1e16c870 | 44 | struct tm *ptm = localtime(&rawtime); |
emilmont | 1:46ce1e16c870 | 45 | return (DWORD)(ptm->tm_year - 80) << 25 |
emilmont | 1:46ce1e16c870 | 46 | | (DWORD)(ptm->tm_mon + 1 ) << 21 |
emilmont | 1:46ce1e16c870 | 47 | | (DWORD)(ptm->tm_mday ) << 16 |
emilmont | 1:46ce1e16c870 | 48 | | (DWORD)(ptm->tm_hour ) << 11 |
emilmont | 1:46ce1e16c870 | 49 | | (DWORD)(ptm->tm_min ) << 5 |
emilmont | 1:46ce1e16c870 | 50 | | (DWORD)(ptm->tm_sec/2 ); |
emilmont | 1:46ce1e16c870 | 51 | } |
emilmont | 1:46ce1e16c870 | 52 | |
emilmont | 1:46ce1e16c870 | 53 | FATFileSystem *FATFileSystem::_ffs[_VOLUMES] = {0}; |
emilmont | 1:46ce1e16c870 | 54 | |
emilmont | 1:46ce1e16c870 | 55 | FATFileSystem::FATFileSystem(const char* n) : FileSystemLike(n) { |
emilmont | 1:46ce1e16c870 | 56 | debug_if(FFS_DBG, "FATFileSystem(%s)\n", n); |
emilmont | 1:46ce1e16c870 | 57 | for(int i=0; i<_VOLUMES; i++) { |
emilmont | 1:46ce1e16c870 | 58 | if(_ffs[i] == 0) { |
emilmont | 1:46ce1e16c870 | 59 | _ffs[i] = this; |
emilmont | 1:46ce1e16c870 | 60 | _fsid = i; |
emilmont | 1:46ce1e16c870 | 61 | debug_if(FFS_DBG, "Mounting [%s] on ffs drive [%d]\n", _name, _fsid); |
emilmont | 1:46ce1e16c870 | 62 | f_mount(i, &_fs); |
emilmont | 1:46ce1e16c870 | 63 | return; |
emilmont | 1:46ce1e16c870 | 64 | } |
emilmont | 1:46ce1e16c870 | 65 | } |
emilmont | 1:46ce1e16c870 | 66 | error("Couldn't create %s in FATFileSystem::FATFileSystem\n", n); |
emilmont | 1:46ce1e16c870 | 67 | } |
emilmont | 1:46ce1e16c870 | 68 | |
emilmont | 1:46ce1e16c870 | 69 | FATFileSystem::~FATFileSystem() { |
emilmont | 1:46ce1e16c870 | 70 | for (int i=0; i<_VOLUMES; i++) { |
emilmont | 1:46ce1e16c870 | 71 | if (_ffs[i] == this) { |
emilmont | 1:46ce1e16c870 | 72 | _ffs[i] = 0; |
emilmont | 1:46ce1e16c870 | 73 | f_mount(i, NULL); |
emilmont | 1:46ce1e16c870 | 74 | } |
emilmont | 1:46ce1e16c870 | 75 | } |
emilmont | 1:46ce1e16c870 | 76 | } |
emilmont | 1:46ce1e16c870 | 77 | |
emilmont | 1:46ce1e16c870 | 78 | FileHandle *FATFileSystem::open(const char* name, int flags) { |
emilmont | 1:46ce1e16c870 | 79 | debug_if(FFS_DBG, "open(%s) on filesystem [%s], drv [%d]\n", name, _name, _fsid); |
emilmont | 1:46ce1e16c870 | 80 | char n[64]; |
emilmont | 1:46ce1e16c870 | 81 | sprintf(n, "%d:/%s", _fsid, name); |
emilmont | 1:46ce1e16c870 | 82 | |
emilmont | 1:46ce1e16c870 | 83 | /* POSIX flags -> FatFS open mode */ |
emilmont | 1:46ce1e16c870 | 84 | BYTE openmode; |
emilmont | 1:46ce1e16c870 | 85 | if (flags & O_RDWR) { |
bkc_mbed | 4:c9dcfcfd0c5a | 86 | openmode = FA_RDWR; |
emilmont | 1:46ce1e16c870 | 87 | } else if(flags & O_WRONLY) { |
emilmont | 1:46ce1e16c870 | 88 | openmode = FA_WRITE; |
emilmont | 1:46ce1e16c870 | 89 | } else { |
emilmont | 1:46ce1e16c870 | 90 | openmode = FA_READ; |
emilmont | 1:46ce1e16c870 | 91 | } |
emilmont | 1:46ce1e16c870 | 92 | if(flags & O_CREAT) { |
emilmont | 1:46ce1e16c870 | 93 | if(flags & O_TRUNC) { |
emilmont | 1:46ce1e16c870 | 94 | openmode |= FA_CREATE_ALWAYS; |
emilmont | 1:46ce1e16c870 | 95 | } else { |
emilmont | 1:46ce1e16c870 | 96 | openmode |= FA_OPEN_ALWAYS; |
emilmont | 1:46ce1e16c870 | 97 | } |
emilmont | 1:46ce1e16c870 | 98 | } |
emilmont | 1:46ce1e16c870 | 99 | |
emilmont | 1:46ce1e16c870 | 100 | FIL fh; |
emilmont | 1:46ce1e16c870 | 101 | FRESULT res = f_open(&fh, n, openmode); |
emilmont | 1:46ce1e16c870 | 102 | if (res) { |
emilmont | 1:46ce1e16c870 | 103 | debug_if(FFS_DBG, "f_open('w') failed: %d\n", res); |
emilmont | 1:46ce1e16c870 | 104 | return NULL; |
emilmont | 1:46ce1e16c870 | 105 | } |
emilmont | 1:46ce1e16c870 | 106 | if (flags & O_APPEND) { |
emilmont | 1:46ce1e16c870 | 107 | f_lseek(&fh, fh.fsize); |
emilmont | 1:46ce1e16c870 | 108 | } |
emilmont | 1:46ce1e16c870 | 109 | return new FATFileHandle(fh); |
emilmont | 1:46ce1e16c870 | 110 | } |
emilmont | 1:46ce1e16c870 | 111 | |
emilmont | 1:46ce1e16c870 | 112 | int FATFileSystem::remove(const char *filename) { |
bkc_mbed | 4:c9dcfcfd0c5a | 113 | #ifdef FAT_TINY |
bkc_mbed | 4:c9dcfcfd0c5a | 114 | return -1; |
bkc_mbed | 4:c9dcfcfd0c5a | 115 | #else |
emilmont | 1:46ce1e16c870 | 116 | FRESULT res = f_unlink(filename); |
emilmont | 1:46ce1e16c870 | 117 | if (res) { |
emilmont | 1:46ce1e16c870 | 118 | debug_if(FFS_DBG, "f_unlink() failed: %d\n", res); |
emilmont | 1:46ce1e16c870 | 119 | return -1; |
emilmont | 1:46ce1e16c870 | 120 | } |
emilmont | 1:46ce1e16c870 | 121 | return 0; |
bkc_mbed | 4:c9dcfcfd0c5a | 122 | #endif |
emilmont | 1:46ce1e16c870 | 123 | } |
emilmont | 1:46ce1e16c870 | 124 | |
emilmont | 1:46ce1e16c870 | 125 | int FATFileSystem::format() { |
bkc_mbed | 4:c9dcfcfd0c5a | 126 | #ifdef FAT_TINY |
bkc_mbed | 4:c9dcfcfd0c5a | 127 | return -1; |
bkc_mbed | 4:c9dcfcfd0c5a | 128 | #else |
emilmont | 1:46ce1e16c870 | 129 | FRESULT res = f_mkfs(_fsid, 0, 512); // Logical drive number, Partitioning rule, Allocation unit size (bytes per cluster) |
emilmont | 1:46ce1e16c870 | 130 | if (res) { |
emilmont | 1:46ce1e16c870 | 131 | debug_if(FFS_DBG, "f_mkfs() failed: %d\n", res); |
emilmont | 1:46ce1e16c870 | 132 | return -1; |
emilmont | 1:46ce1e16c870 | 133 | } |
emilmont | 1:46ce1e16c870 | 134 | return 0; |
bkc_mbed | 4:c9dcfcfd0c5a | 135 | #endif |
emilmont | 1:46ce1e16c870 | 136 | } |
emilmont | 1:46ce1e16c870 | 137 | |
emilmont | 1:46ce1e16c870 | 138 | DirHandle *FATFileSystem::opendir(const char *name) { |
emilmont | 1:46ce1e16c870 | 139 | FATFS_DIR dir; |
emilmont | 1:46ce1e16c870 | 140 | FRESULT res = f_opendir(&dir, name); |
emilmont | 1:46ce1e16c870 | 141 | if (res != 0) { |
emilmont | 1:46ce1e16c870 | 142 | return NULL; |
emilmont | 1:46ce1e16c870 | 143 | } |
emilmont | 1:46ce1e16c870 | 144 | return new FATDirHandle(dir); |
emilmont | 1:46ce1e16c870 | 145 | } |
emilmont | 1:46ce1e16c870 | 146 | |
emilmont | 1:46ce1e16c870 | 147 | int FATFileSystem::mkdir(const char *name, mode_t mode) { |
bkc_mbed | 4:c9dcfcfd0c5a | 148 | #ifdef FAT_TINY |
bkc_mbed | 4:c9dcfcfd0c5a | 149 | return -1; |
bkc_mbed | 4:c9dcfcfd0c5a | 150 | #else |
emilmont | 1:46ce1e16c870 | 151 | FRESULT res = f_mkdir(name); |
emilmont | 1:46ce1e16c870 | 152 | return res == 0 ? 0 : -1; |
bkc_mbed | 4:c9dcfcfd0c5a | 153 | #endif |
emilmont | 1:46ce1e16c870 | 154 | } |