Alek Boving / SDFileSystem8

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FATFileSystem/FATFileSystem.cpp@0:83e8ad3d9a65, 2020-11-12 (annotated)

Committer:
alekboving
Date:
Thu Nov 12 15:20:15 2020 +0000
Revision:
0:83e8ad3d9a65
initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
alekboving 0:83e8ad3d9a65 1 /* mbed Microcontroller Library
alekboving 0:83e8ad3d9a65 2 * Copyright (c) 2006-2012 ARM Limited
alekboving 0:83e8ad3d9a65 3 *
alekboving 0:83e8ad3d9a65 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
alekboving 0:83e8ad3d9a65 5 * of this software and associated documentation files (the "Software"), to deal
alekboving 0:83e8ad3d9a65 6 * in the Software without restriction, including without limitation the rights
alekboving 0:83e8ad3d9a65 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
alekboving 0:83e8ad3d9a65 8 * copies of the Software, and to permit persons to whom the Software is
alekboving 0:83e8ad3d9a65 9 * furnished to do so, subject to the following conditions:
alekboving 0:83e8ad3d9a65 10 *
alekboving 0:83e8ad3d9a65 11 * The above copyright notice and this permission notice shall be included in
alekboving 0:83e8ad3d9a65 12 * all copies or substantial portions of the Software.
alekboving 0:83e8ad3d9a65 13 *
alekboving 0:83e8ad3d9a65 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
alekboving 0:83e8ad3d9a65 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
alekboving 0:83e8ad3d9a65 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
alekboving 0:83e8ad3d9a65 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
alekboving 0:83e8ad3d9a65 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
alekboving 0:83e8ad3d9a65 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
alekboving 0:83e8ad3d9a65 20 * SOFTWARE.
alekboving 0:83e8ad3d9a65 21 */
alekboving 0:83e8ad3d9a65 22 #include "mbed.h"
alekboving 0:83e8ad3d9a65 23
alekboving 0:83e8ad3d9a65 24 #include "ffconf.h"
alekboving 0:83e8ad3d9a65 25 #include "mbed_debug.h"
alekboving 0:83e8ad3d9a65 26
alekboving 0:83e8ad3d9a65 27 #include "FATFileSystem.h"
alekboving 0:83e8ad3d9a65 28 #include "FATFileHandle.h"
alekboving 0:83e8ad3d9a65 29 #include "FATDirHandle.h"
alekboving 0:83e8ad3d9a65 30
alekboving 0:83e8ad3d9a65 31 DWORD get_fattime(void) {
alekboving 0:83e8ad3d9a65 32 time_t rawtime;
alekboving 0:83e8ad3d9a65 33 time(&rawtime);
alekboving 0:83e8ad3d9a65 34 struct tm *ptm = localtime(&rawtime);
alekboving 0:83e8ad3d9a65 35 return (DWORD)(ptm->tm_year - 80) << 25
alekboving 0:83e8ad3d9a65 36 | (DWORD)(ptm->tm_mon + 1 ) << 21
alekboving 0:83e8ad3d9a65 37 | (DWORD)(ptm->tm_mday ) << 16
alekboving 0:83e8ad3d9a65 38 | (DWORD)(ptm->tm_hour ) << 11
alekboving 0:83e8ad3d9a65 39 | (DWORD)(ptm->tm_min ) << 5
alekboving 0:83e8ad3d9a65 40 | (DWORD)(ptm->tm_sec/2 );
alekboving 0:83e8ad3d9a65 41 }
alekboving 0:83e8ad3d9a65 42
alekboving 0:83e8ad3d9a65 43 FATFileSystem *FATFileSystem::_ffs[_VOLUMES] = {0};
alekboving 0:83e8ad3d9a65 44
alekboving 0:83e8ad3d9a65 45 FATFileSystem::FATFileSystem(const char* n) : FileSystemLike(n) {
alekboving 0:83e8ad3d9a65 46 debug_if(FFS_DBG, "FATFileSystem(%s)\n", n);
alekboving 0:83e8ad3d9a65 47 for(int i=0; i<_VOLUMES; i++) {
alekboving 0:83e8ad3d9a65 48 if(_ffs[i] == 0) {
alekboving 0:83e8ad3d9a65 49 _ffs[i] = this;
alekboving 0:83e8ad3d9a65 50 _fsid[0] = '0' + i;
alekboving 0:83e8ad3d9a65 51 _fsid[1] = '\0';
alekboving 0:83e8ad3d9a65 52 debug_if(FFS_DBG, "Mounting [%s] on ffs drive [%s]\n", getName(), _fsid);
alekboving 0:83e8ad3d9a65 53 f_mount(&_fs, _fsid, 0);
alekboving 0:83e8ad3d9a65 54 return;
alekboving 0:83e8ad3d9a65 55 }
alekboving 0:83e8ad3d9a65 56 }
alekboving 0:83e8ad3d9a65 57 error("Couldn't create %s in FATFileSystem::FATFileSystem\n", n);
alekboving 0:83e8ad3d9a65 58 }
alekboving 0:83e8ad3d9a65 59
alekboving 0:83e8ad3d9a65 60 FATFileSystem::~FATFileSystem() {
alekboving 0:83e8ad3d9a65 61 for (int i=0; i<_VOLUMES; i++) {
alekboving 0:83e8ad3d9a65 62 if (_ffs[i] == this) {
alekboving 0:83e8ad3d9a65 63 _ffs[i] = 0;
alekboving 0:83e8ad3d9a65 64 f_mount(NULL, _fsid, 0);
alekboving 0:83e8ad3d9a65 65 }
alekboving 0:83e8ad3d9a65 66 }
alekboving 0:83e8ad3d9a65 67 }
alekboving 0:83e8ad3d9a65 68
alekboving 0:83e8ad3d9a65 69 FileHandle *FATFileSystem::open(const char* name, int flags) {
alekboving 0:83e8ad3d9a65 70 debug_if(FFS_DBG, "open(%s) on filesystem [%s], drv [%s]\n", name, getName(), _fsid);
alekboving 0:83e8ad3d9a65 71 char n[64];
alekboving 0:83e8ad3d9a65 72 sprintf(n, "%s:/%s", _fsid, name);
alekboving 0:83e8ad3d9a65 73
alekboving 0:83e8ad3d9a65 74 /* POSIX flags -> FatFS open mode */
alekboving 0:83e8ad3d9a65 75 BYTE openmode;
alekboving 0:83e8ad3d9a65 76 if (flags & O_RDWR) {
alekboving 0:83e8ad3d9a65 77 openmode = FA_READ|FA_WRITE;
alekboving 0:83e8ad3d9a65 78 } else if(flags & O_WRONLY) {
alekboving 0:83e8ad3d9a65 79 openmode = FA_WRITE;
alekboving 0:83e8ad3d9a65 80 } else {
alekboving 0:83e8ad3d9a65 81 openmode = FA_READ;
alekboving 0:83e8ad3d9a65 82 }
alekboving 0:83e8ad3d9a65 83 if(flags & O_CREAT) {
alekboving 0:83e8ad3d9a65 84 if(flags & O_TRUNC) {
alekboving 0:83e8ad3d9a65 85 openmode |= FA_CREATE_ALWAYS;
alekboving 0:83e8ad3d9a65 86 } else {
alekboving 0:83e8ad3d9a65 87 openmode |= FA_OPEN_ALWAYS;
alekboving 0:83e8ad3d9a65 88 }
alekboving 0:83e8ad3d9a65 89 }
alekboving 0:83e8ad3d9a65 90
alekboving 0:83e8ad3d9a65 91 FIL fh;
alekboving 0:83e8ad3d9a65 92 FRESULT res = f_open(&fh, n, openmode);
alekboving 0:83e8ad3d9a65 93 if (res) {
alekboving 0:83e8ad3d9a65 94 debug_if(FFS_DBG, "f_open('w') failed: %d\n", res);
alekboving 0:83e8ad3d9a65 95 return NULL;
alekboving 0:83e8ad3d9a65 96 }
alekboving 0:83e8ad3d9a65 97 if (flags & O_APPEND) {
alekboving 0:83e8ad3d9a65 98 f_lseek(&fh, fh.fsize);
alekboving 0:83e8ad3d9a65 99 }
alekboving 0:83e8ad3d9a65 100 return new FATFileHandle(fh);
alekboving 0:83e8ad3d9a65 101 }
alekboving 0:83e8ad3d9a65 102
alekboving 0:83e8ad3d9a65 103 int FATFileSystem::open(FileHandle **file, const char *name, int flags) {
alekboving 0:83e8ad3d9a65 104 FileHandle *temp = open(name, flags);
alekboving 0:83e8ad3d9a65 105 if (!temp) {
alekboving 0:83e8ad3d9a65 106 return -1;
alekboving 0:83e8ad3d9a65 107 }
alekboving 0:83e8ad3d9a65 108
alekboving 0:83e8ad3d9a65 109 *file = temp;
alekboving 0:83e8ad3d9a65 110 return 0;
alekboving 0:83e8ad3d9a65 111 }
alekboving 0:83e8ad3d9a65 112
alekboving 0:83e8ad3d9a65 113 int FATFileSystem::remove(const char *filename) {
alekboving 0:83e8ad3d9a65 114 FRESULT res = f_unlink(filename);
alekboving 0:83e8ad3d9a65 115 if (res) {
alekboving 0:83e8ad3d9a65 116 debug_if(FFS_DBG, "f_unlink() failed: %d\n", res);
alekboving 0:83e8ad3d9a65 117 return -1;
alekboving 0:83e8ad3d9a65 118 }
alekboving 0:83e8ad3d9a65 119 return 0;
alekboving 0:83e8ad3d9a65 120 }
alekboving 0:83e8ad3d9a65 121
alekboving 0:83e8ad3d9a65 122 int FATFileSystem::rename(const char *oldname, const char *newname) {
alekboving 0:83e8ad3d9a65 123 FRESULT res = f_rename(oldname, newname);
alekboving 0:83e8ad3d9a65 124 if (res) {
alekboving 0:83e8ad3d9a65 125 debug_if(FFS_DBG, "f_rename() failed: %d\n", res);
alekboving 0:83e8ad3d9a65 126 return -1;
alekboving 0:83e8ad3d9a65 127 }
alekboving 0:83e8ad3d9a65 128 return 0;
alekboving 0:83e8ad3d9a65 129 }
alekboving 0:83e8ad3d9a65 130
alekboving 0:83e8ad3d9a65 131 int FATFileSystem::format() {
alekboving 0:83e8ad3d9a65 132 FRESULT res = f_mkfs(_fsid, 0, 512); // Logical drive number, Partitioning rule, Allocation unit size (bytes per cluster)
alekboving 0:83e8ad3d9a65 133 if (res) {
alekboving 0:83e8ad3d9a65 134 debug_if(FFS_DBG, "f_mkfs() failed: %d\n", res);
alekboving 0:83e8ad3d9a65 135 return -1;
alekboving 0:83e8ad3d9a65 136 }
alekboving 0:83e8ad3d9a65 137 return 0;
alekboving 0:83e8ad3d9a65 138 }
alekboving 0:83e8ad3d9a65 139
alekboving 0:83e8ad3d9a65 140 DirHandle *FATFileSystem::opendir(const char *name) {
alekboving 0:83e8ad3d9a65 141 FATFS_DIR dir;
alekboving 0:83e8ad3d9a65 142 FRESULT res = f_opendir(&dir, name);
alekboving 0:83e8ad3d9a65 143 if (res != 0) {
alekboving 0:83e8ad3d9a65 144 return NULL;
alekboving 0:83e8ad3d9a65 145 }
alekboving 0:83e8ad3d9a65 146 return new FATDirHandle(dir);
alekboving 0:83e8ad3d9a65 147 }
alekboving 0:83e8ad3d9a65 148
alekboving 0:83e8ad3d9a65 149 int FATFileSystem::open(DirHandle **dir, const char *name) {
alekboving 0:83e8ad3d9a65 150 DirHandle *temp = opendir(name);
alekboving 0:83e8ad3d9a65 151 if (!temp) {
alekboving 0:83e8ad3d9a65 152 return -1;
alekboving 0:83e8ad3d9a65 153 }
alekboving 0:83e8ad3d9a65 154
alekboving 0:83e8ad3d9a65 155 *dir = temp;
alekboving 0:83e8ad3d9a65 156 return 0;
alekboving 0:83e8ad3d9a65 157 }
alekboving 0:83e8ad3d9a65 158
alekboving 0:83e8ad3d9a65 159 int FATFileSystem::mkdir(const char *name, mode_t mode) {
alekboving 0:83e8ad3d9a65 160 FRESULT res = f_mkdir(name);
alekboving 0:83e8ad3d9a65 161 return res == 0 ? 0 : -1;
alekboving 0:83e8ad3d9a65 162 }
alekboving 0:83e8ad3d9a65 163
alekboving 0:83e8ad3d9a65 164 int FATFileSystem::mount() {
alekboving 0:83e8ad3d9a65 165 FRESULT res = f_mount(&_fs, _fsid, 1);
alekboving 0:83e8ad3d9a65 166 return res == 0 ? 0 : -1;
alekboving 0:83e8ad3d9a65 167 }
alekboving 0:83e8ad3d9a65 168
alekboving 0:83e8ad3d9a65 169 int FATFileSystem::unmount() {
alekboving 0:83e8ad3d9a65 170 if (disk_sync())
alekboving 0:83e8ad3d9a65 171 return -1;
alekboving 0:83e8ad3d9a65 172 FRESULT res = f_mount(NULL, _fsid, 0);
alekboving 0:83e8ad3d9a65 173 return res == 0 ? 0 : -1;
alekboving 0:83e8ad3d9a65 174 }