Fanny Calle / SDFileSystem

this library has few changes from the original library, for effects of this work.

Dependents:   OBC3_1_h

FATFileSystem/FATFileSystem.cpp@0:8214896432e0, 2018-05-21 (annotated)

Committer:
FannyCalle
Date:
Mon May 21 15:10:37 2018 +0000
Revision:
0:8214896432e0
el sd hay que revisar;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
FannyCalle 0:8214896432e0 1 /* mbed Microcontroller Library
FannyCalle 0:8214896432e0 2 * Copyright (c) 2006-2012 ARM Limited
FannyCalle 0:8214896432e0 3 *
FannyCalle 0:8214896432e0 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
FannyCalle 0:8214896432e0 5 * of this software and associated documentation files (the "Software"), to deal
FannyCalle 0:8214896432e0 6 * in the Software without restriction, including without limitation the rights
FannyCalle 0:8214896432e0 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
FannyCalle 0:8214896432e0 8 * copies of the Software, and to permit persons to whom the Software is
FannyCalle 0:8214896432e0 9 * furnished to do so, subject to the following conditions:
FannyCalle 0:8214896432e0 10 *
FannyCalle 0:8214896432e0 11 * The above copyright notice and this permission notice shall be included in
FannyCalle 0:8214896432e0 12 * all copies or substantial portions of the Software.
FannyCalle 0:8214896432e0 13 *
FannyCalle 0:8214896432e0 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
FannyCalle 0:8214896432e0 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FannyCalle 0:8214896432e0 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
FannyCalle 0:8214896432e0 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
FannyCalle 0:8214896432e0 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
FannyCalle 0:8214896432e0 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
FannyCalle 0:8214896432e0 20 * SOFTWARE.
FannyCalle 0:8214896432e0 21 */
FannyCalle 0:8214896432e0 22 #include "mbed.h"
FannyCalle 0:8214896432e0 23
FannyCalle 0:8214896432e0 24 #include "ffconf.h"
FannyCalle 0:8214896432e0 25 #include "mbed_debug.h"
FannyCalle 0:8214896432e0 26
FannyCalle 0:8214896432e0 27 #include "FATFileSystem.h"
FannyCalle 0:8214896432e0 28 #include "FATFileHandle.h"
FannyCalle 0:8214896432e0 29 #include "FATDirHandle.h"
FannyCalle 0:8214896432e0 30
FannyCalle 0:8214896432e0 31 DWORD get_fattime(void) {
FannyCalle 0:8214896432e0 32 time_t rawtime;
FannyCalle 0:8214896432e0 33 time(&rawtime);
FannyCalle 0:8214896432e0 34 struct tm *ptm = localtime(&rawtime);
FannyCalle 0:8214896432e0 35 return (DWORD)(ptm->tm_year - 80) << 25
FannyCalle 0:8214896432e0 36 | (DWORD)(ptm->tm_mon + 1 ) << 21
FannyCalle 0:8214896432e0 37 | (DWORD)(ptm->tm_mday ) << 16
FannyCalle 0:8214896432e0 38 | (DWORD)(ptm->tm_hour ) << 11
FannyCalle 0:8214896432e0 39 | (DWORD)(ptm->tm_min ) << 5
FannyCalle 0:8214896432e0 40 | (DWORD)(ptm->tm_sec/2 );
FannyCalle 0:8214896432e0 41 }
FannyCalle 0:8214896432e0 42
FannyCalle 0:8214896432e0 43 FATFileSystem *FATFileSystem::_ffs[_VOLUMES] = {0};
FannyCalle 0:8214896432e0 44
FannyCalle 0:8214896432e0 45 FATFileSystem::FATFileSystem(const char* n) : FileSystemLike(n) {
FannyCalle 0:8214896432e0 46 debug_if(FFS_DBG, "FATFileSystem(%s)\n", n);
FannyCalle 0:8214896432e0 47 for(int i=0; i<_VOLUMES; i++) {
FannyCalle 0:8214896432e0 48 if(_ffs[i] == 0) {
FannyCalle 0:8214896432e0 49 _ffs[i] = this;
FannyCalle 0:8214896432e0 50 _fsid[0] = '0' + i;
FannyCalle 0:8214896432e0 51 _fsid[1] = '\0';
FannyCalle 0:8214896432e0 52 debug_if(FFS_DBG, "Mounting [%s] on ffs drive [%s]\n", getName(), _fsid);
FannyCalle 0:8214896432e0 53 f_mount(&_fs, _fsid, 0);
FannyCalle 0:8214896432e0 54 return;
FannyCalle 0:8214896432e0 55 }
FannyCalle 0:8214896432e0 56 }
FannyCalle 0:8214896432e0 57 error("Couldn't create %s in FATFileSystem::FATFileSystem\n", n);
FannyCalle 0:8214896432e0 58 }
FannyCalle 0:8214896432e0 59
FannyCalle 0:8214896432e0 60 FATFileSystem::~FATFileSystem() {
FannyCalle 0:8214896432e0 61 for (int i=0; i<_VOLUMES; i++) {
FannyCalle 0:8214896432e0 62 if (_ffs[i] == this) {
FannyCalle 0:8214896432e0 63 _ffs[i] = 0;
FannyCalle 0:8214896432e0 64 f_mount(NULL, _fsid, 0);
FannyCalle 0:8214896432e0 65 }
FannyCalle 0:8214896432e0 66 }
FannyCalle 0:8214896432e0 67 }
FannyCalle 0:8214896432e0 68
FannyCalle 0:8214896432e0 69 FileHandle *FATFileSystem::open(const char* name, int flags) {
FannyCalle 0:8214896432e0 70 debug_if(FFS_DBG, "open(%s) on filesystem [%s], drv [%s]\n", name, getName(), _fsid);
FannyCalle 0:8214896432e0 71 char n[64];
FannyCalle 0:8214896432e0 72 sprintf(n, "%s:/%s", _fsid, name);
FannyCalle 0:8214896432e0 73
FannyCalle 0:8214896432e0 74 /* POSIX flags -> FatFS open mode */
FannyCalle 0:8214896432e0 75 BYTE openmode;
FannyCalle 0:8214896432e0 76 if (flags & O_RDWR) {
FannyCalle 0:8214896432e0 77 openmode = FA_READ|FA_WRITE;
FannyCalle 0:8214896432e0 78 } else if(flags & O_WRONLY) {
FannyCalle 0:8214896432e0 79 openmode = FA_WRITE;
FannyCalle 0:8214896432e0 80 } else {
FannyCalle 0:8214896432e0 81 openmode = FA_READ;
FannyCalle 0:8214896432e0 82 }
FannyCalle 0:8214896432e0 83 if(flags & O_CREAT) {
FannyCalle 0:8214896432e0 84 if(flags & O_TRUNC) {
FannyCalle 0:8214896432e0 85 openmode |= FA_CREATE_ALWAYS;
FannyCalle 0:8214896432e0 86 } else {
FannyCalle 0:8214896432e0 87 openmode |= FA_OPEN_ALWAYS;
FannyCalle 0:8214896432e0 88 }
FannyCalle 0:8214896432e0 89 }
FannyCalle 0:8214896432e0 90
FannyCalle 0:8214896432e0 91 FIL fh;
FannyCalle 0:8214896432e0 92 FRESULT res = f_open(&fh, n, openmode);
FannyCalle 0:8214896432e0 93 if (res) {
FannyCalle 0:8214896432e0 94 debug_if(FFS_DBG, "f_open('w') failed: %d\n", res);
FannyCalle 0:8214896432e0 95 return NULL;
FannyCalle 0:8214896432e0 96 }
FannyCalle 0:8214896432e0 97 if (flags & O_APPEND) {
FannyCalle 0:8214896432e0 98 f_lseek(&fh, fh.fsize);
FannyCalle 0:8214896432e0 99 }
FannyCalle 0:8214896432e0 100 return new FATFileHandle(fh);
FannyCalle 0:8214896432e0 101 }
FannyCalle 0:8214896432e0 102
FannyCalle 0:8214896432e0 103 int FATFileSystem::remove(const char *filename) {
FannyCalle 0:8214896432e0 104 FRESULT res = f_unlink(filename);
FannyCalle 0:8214896432e0 105 if (res) {
FannyCalle 0:8214896432e0 106 debug_if(FFS_DBG, "f_unlink() failed: %d\n", res);
FannyCalle 0:8214896432e0 107 return -1;
FannyCalle 0:8214896432e0 108 }
FannyCalle 0:8214896432e0 109 return 0;
FannyCalle 0:8214896432e0 110 }
FannyCalle 0:8214896432e0 111
FannyCalle 0:8214896432e0 112 int FATFileSystem::rename(const char *oldname, const char *newname) {
FannyCalle 0:8214896432e0 113 FRESULT res = f_rename(oldname, newname);
FannyCalle 0:8214896432e0 114 if (res) {
FannyCalle 0:8214896432e0 115 debug_if(FFS_DBG, "f_rename() failed: %d\n", res);
FannyCalle 0:8214896432e0 116 return -1;
FannyCalle 0:8214896432e0 117 }
FannyCalle 0:8214896432e0 118 return 0;
FannyCalle 0:8214896432e0 119 }
FannyCalle 0:8214896432e0 120
FannyCalle 0:8214896432e0 121 int FATFileSystem::format() {
FannyCalle 0:8214896432e0 122 FRESULT res = f_mkfs(_fsid, 0, 512); // Logical drive number, Partitioning rule, Allocation unit size (bytes per cluster)
FannyCalle 0:8214896432e0 123 if (res) {
FannyCalle 0:8214896432e0 124 debug_if(FFS_DBG, "f_mkfs() failed: %d\n", res);
FannyCalle 0:8214896432e0 125 return -1;
FannyCalle 0:8214896432e0 126 }
FannyCalle 0:8214896432e0 127 return 0;
FannyCalle 0:8214896432e0 128 }
FannyCalle 0:8214896432e0 129
FannyCalle 0:8214896432e0 130 DirHandle *FATFileSystem::opendir(const char *name) {
FannyCalle 0:8214896432e0 131 FATFS_DIR dir;
FannyCalle 0:8214896432e0 132 FRESULT res = f_opendir(&dir, name);
FannyCalle 0:8214896432e0 133 if (res != 0) {
FannyCalle 0:8214896432e0 134 return NULL;
FannyCalle 0:8214896432e0 135 }
FannyCalle 0:8214896432e0 136 return new FATDirHandle(dir);
FannyCalle 0:8214896432e0 137 }
FannyCalle 0:8214896432e0 138
FannyCalle 0:8214896432e0 139 int FATFileSystem::mkdir(const char *name, mode_t mode) {
FannyCalle 0:8214896432e0 140 FRESULT res = f_mkdir(name);
FannyCalle 0:8214896432e0 141 return res == 0 ? 0 : -1;
FannyCalle 0:8214896432e0 142 }
FannyCalle 0:8214896432e0 143
FannyCalle 0:8214896432e0 144 int FATFileSystem::mount() {
FannyCalle 0:8214896432e0 145 FRESULT res = f_mount(&_fs, _fsid, 1);
FannyCalle 0:8214896432e0 146 return res == 0 ? 0 : -1;
FannyCalle 0:8214896432e0 147 }
FannyCalle 0:8214896432e0 148
FannyCalle 0:8214896432e0 149 int FATFileSystem::unmount() {
FannyCalle 0:8214896432e0 150 if (disk_sync())
FannyCalle 0:8214896432e0 151 return -1;
FannyCalle 0:8214896432e0 152 FRESULT res = f_mount(NULL, _fsid, 0);
FannyCalle 0:8214896432e0 153 return res == 0 ? 0 : -1;
FannyCalle 0:8214896432e0 154 }