Pierre Provent / USBHost

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Dependents:   TEST_USB_Nucleo_F429ZI Essais_USB_Nucleo_F429ZI SID_V3_Nucleo_F429ZI SID_V4_Nucleo_F429ZI_copy

FATFileSystem/FATFileSystem.cpp@0:77ca32e8e04e, 2020-09-25 (annotated)

Committer:
pierreprovent
Date:
Fri Sep 25 10:17:49 2020 +0000
Revision:
0:77ca32e8e04e
Programme acquisition en enregistrement sur clef USB carte Nucleo F429ZI cours ELE118 Cnam

Who changed what in which revision?

UserRevisionLine numberNew contents of line
pierreprovent 0:77ca32e8e04e 1 /* mbed Microcontroller Library
pierreprovent 0:77ca32e8e04e 2 * Copyright (c) 2006-2012 ARM Limited
pierreprovent 0:77ca32e8e04e 3 *
pierreprovent 0:77ca32e8e04e 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
pierreprovent 0:77ca32e8e04e 5 * of this software and associated documentation files (the "Software"), to deal
pierreprovent 0:77ca32e8e04e 6 * in the Software without restriction, including without limitation the rights
pierreprovent 0:77ca32e8e04e 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
pierreprovent 0:77ca32e8e04e 8 * copies of the Software, and to permit persons to whom the Software is
pierreprovent 0:77ca32e8e04e 9 * furnished to do so, subject to the following conditions:
pierreprovent 0:77ca32e8e04e 10 *
pierreprovent 0:77ca32e8e04e 11 * The above copyright notice and this permission notice shall be included in
pierreprovent 0:77ca32e8e04e 12 * all copies or substantial portions of the Software.
pierreprovent 0:77ca32e8e04e 13 *
pierreprovent 0:77ca32e8e04e 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
pierreprovent 0:77ca32e8e04e 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
pierreprovent 0:77ca32e8e04e 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
pierreprovent 0:77ca32e8e04e 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
pierreprovent 0:77ca32e8e04e 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
pierreprovent 0:77ca32e8e04e 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
pierreprovent 0:77ca32e8e04e 20 * SOFTWARE.
pierreprovent 0:77ca32e8e04e 21 */
pierreprovent 0:77ca32e8e04e 22 #include "mbed.h"
pierreprovent 0:77ca32e8e04e 23
pierreprovent 0:77ca32e8e04e 24 #include "ffconf.h"
pierreprovent 0:77ca32e8e04e 25 #include "mbed_debug.h"
pierreprovent 0:77ca32e8e04e 26
pierreprovent 0:77ca32e8e04e 27 #include "FATFileSystem.h"
pierreprovent 0:77ca32e8e04e 28 #include "FATFileHandle.h"
pierreprovent 0:77ca32e8e04e 29 #include "FATDirHandle.h"
pierreprovent 0:77ca32e8e04e 30
pierreprovent 0:77ca32e8e04e 31 DWORD get_fattime(void) {
pierreprovent 0:77ca32e8e04e 32 time_t rawtime;
pierreprovent 0:77ca32e8e04e 33 time(&rawtime);
pierreprovent 0:77ca32e8e04e 34 struct tm *ptm = localtime(&rawtime);
pierreprovent 0:77ca32e8e04e 35 return (DWORD)(ptm->tm_year - 80) << 25
pierreprovent 0:77ca32e8e04e 36 | (DWORD)(ptm->tm_mon + 1 ) << 21
pierreprovent 0:77ca32e8e04e 37 | (DWORD)(ptm->tm_mday ) << 16
pierreprovent 0:77ca32e8e04e 38 | (DWORD)(ptm->tm_hour ) << 11
pierreprovent 0:77ca32e8e04e 39 | (DWORD)(ptm->tm_min ) << 5
pierreprovent 0:77ca32e8e04e 40 | (DWORD)(ptm->tm_sec/2 );
pierreprovent 0:77ca32e8e04e 41 }
pierreprovent 0:77ca32e8e04e 42
pierreprovent 0:77ca32e8e04e 43 FATFileSystem *FATFileSystem::_ffs[_VOLUMES] = {0};
pierreprovent 0:77ca32e8e04e 44
pierreprovent 0:77ca32e8e04e 45 FATFileSystem::FATFileSystem(const char* n) : FileSystemLike(n) {
pierreprovent 0:77ca32e8e04e 46 debug_if(FFS_DBG, "FATFileSystem(%s)\n", n);
pierreprovent 0:77ca32e8e04e 47 for(int i=0; i<_VOLUMES; i++) {
pierreprovent 0:77ca32e8e04e 48 if(_ffs[i] == 0) {
pierreprovent 0:77ca32e8e04e 49 _ffs[i] = this;
pierreprovent 0:77ca32e8e04e 50 _fsid[0] = '0' + i;
pierreprovent 0:77ca32e8e04e 51 _fsid[1] = '\0';
pierreprovent 0:77ca32e8e04e 52 debug_if(FFS_DBG, "Mounting [%s] on ffs drive [%s]\n", getName(), _fsid);
pierreprovent 0:77ca32e8e04e 53 f_mount(&_fs, _fsid, 0);
pierreprovent 0:77ca32e8e04e 54 return;
pierreprovent 0:77ca32e8e04e 55 }
pierreprovent 0:77ca32e8e04e 56 }
pierreprovent 0:77ca32e8e04e 57 error("Couldn't create %s in FATFileSystem::FATFileSystem\n", n);
pierreprovent 0:77ca32e8e04e 58 }
pierreprovent 0:77ca32e8e04e 59
pierreprovent 0:77ca32e8e04e 60 FATFileSystem::~FATFileSystem() {
pierreprovent 0:77ca32e8e04e 61 for (int i=0; i<_VOLUMES; i++) {
pierreprovent 0:77ca32e8e04e 62 if (_ffs[i] == this) {
pierreprovent 0:77ca32e8e04e 63 _ffs[i] = 0;
pierreprovent 0:77ca32e8e04e 64 f_mount(NULL, _fsid, 0);
pierreprovent 0:77ca32e8e04e 65 }
pierreprovent 0:77ca32e8e04e 66 }
pierreprovent 0:77ca32e8e04e 67 }
pierreprovent 0:77ca32e8e04e 68
pierreprovent 0:77ca32e8e04e 69 FileHandle *FATFileSystem::open(const char* name, int flags) {
pierreprovent 0:77ca32e8e04e 70 debug_if(FFS_DBG, "open(%s) on filesystem [%s], drv [%s]\n", name, getName(), _fsid);
pierreprovent 0:77ca32e8e04e 71 char n[64];
pierreprovent 0:77ca32e8e04e 72 sprintf(n, "%s:/%s", _fsid, name);
pierreprovent 0:77ca32e8e04e 73
pierreprovent 0:77ca32e8e04e 74 /* POSIX flags -> FatFS open mode */
pierreprovent 0:77ca32e8e04e 75 BYTE openmode;
pierreprovent 0:77ca32e8e04e 76 if (flags & O_RDWR) {
pierreprovent 0:77ca32e8e04e 77 openmode = FA_READ|FA_WRITE;
pierreprovent 0:77ca32e8e04e 78 } else if(flags & O_WRONLY) {
pierreprovent 0:77ca32e8e04e 79 openmode = FA_WRITE;
pierreprovent 0:77ca32e8e04e 80 } else {
pierreprovent 0:77ca32e8e04e 81 openmode = FA_READ;
pierreprovent 0:77ca32e8e04e 82 }
pierreprovent 0:77ca32e8e04e 83 if(flags & O_CREAT) {
pierreprovent 0:77ca32e8e04e 84 if(flags & O_TRUNC) {
pierreprovent 0:77ca32e8e04e 85 openmode |= FA_CREATE_ALWAYS;
pierreprovent 0:77ca32e8e04e 86 } else {
pierreprovent 0:77ca32e8e04e 87 openmode |= FA_OPEN_ALWAYS;
pierreprovent 0:77ca32e8e04e 88 }
pierreprovent 0:77ca32e8e04e 89 }
pierreprovent 0:77ca32e8e04e 90
pierreprovent 0:77ca32e8e04e 91 FIL fh;
pierreprovent 0:77ca32e8e04e 92 FRESULT res = f_open(&fh, n, openmode);
pierreprovent 0:77ca32e8e04e 93 if (res) {
pierreprovent 0:77ca32e8e04e 94 debug_if(FFS_DBG, "f_open('w') failed: %d\n", res);
pierreprovent 0:77ca32e8e04e 95 return NULL;
pierreprovent 0:77ca32e8e04e 96 }
pierreprovent 0:77ca32e8e04e 97 if (flags & O_APPEND) {
pierreprovent 0:77ca32e8e04e 98 f_lseek(&fh, fh.fsize);
pierreprovent 0:77ca32e8e04e 99 }
pierreprovent 0:77ca32e8e04e 100 return new FATFileHandle(fh);
pierreprovent 0:77ca32e8e04e 101 }
pierreprovent 0:77ca32e8e04e 102
pierreprovent 0:77ca32e8e04e 103 int FATFileSystem::open(FileHandle **file, const char *name, int flags) {
pierreprovent 0:77ca32e8e04e 104 FileHandle *temp = open(name, flags);
pierreprovent 0:77ca32e8e04e 105 if (!temp) {
pierreprovent 0:77ca32e8e04e 106 return -1;
pierreprovent 0:77ca32e8e04e 107 }
pierreprovent 0:77ca32e8e04e 108
pierreprovent 0:77ca32e8e04e 109 *file = temp;
pierreprovent 0:77ca32e8e04e 110 return 0;
pierreprovent 0:77ca32e8e04e 111 }
pierreprovent 0:77ca32e8e04e 112
pierreprovent 0:77ca32e8e04e 113 int FATFileSystem::remove(const char *filename) {
pierreprovent 0:77ca32e8e04e 114 FRESULT res = f_unlink(filename);
pierreprovent 0:77ca32e8e04e 115 if (res) {
pierreprovent 0:77ca32e8e04e 116 debug_if(FFS_DBG, "f_unlink() failed: %d\n", res);
pierreprovent 0:77ca32e8e04e 117 return -1;
pierreprovent 0:77ca32e8e04e 118 }
pierreprovent 0:77ca32e8e04e 119 return 0;
pierreprovent 0:77ca32e8e04e 120 }
pierreprovent 0:77ca32e8e04e 121
pierreprovent 0:77ca32e8e04e 122 int FATFileSystem::rename(const char *oldname, const char *newname) {
pierreprovent 0:77ca32e8e04e 123 FRESULT res = f_rename(oldname, newname);
pierreprovent 0:77ca32e8e04e 124 if (res) {
pierreprovent 0:77ca32e8e04e 125 debug_if(FFS_DBG, "f_rename() failed: %d\n", res);
pierreprovent 0:77ca32e8e04e 126 return -1;
pierreprovent 0:77ca32e8e04e 127 }
pierreprovent 0:77ca32e8e04e 128 return 0;
pierreprovent 0:77ca32e8e04e 129 }
pierreprovent 0:77ca32e8e04e 130
pierreprovent 0:77ca32e8e04e 131 int FATFileSystem::format() {
pierreprovent 0:77ca32e8e04e 132 FRESULT res = f_mkfs(_fsid, 0, 512); // Logical drive number, Partitioning rule, Allocation unit size (bytes per cluster)
pierreprovent 0:77ca32e8e04e 133 if (res) {
pierreprovent 0:77ca32e8e04e 134 debug_if(FFS_DBG, "f_mkfs() failed: %d\n", res);
pierreprovent 0:77ca32e8e04e 135 return -1;
pierreprovent 0:77ca32e8e04e 136 }
pierreprovent 0:77ca32e8e04e 137 return 0;
pierreprovent 0:77ca32e8e04e 138 }
pierreprovent 0:77ca32e8e04e 139
pierreprovent 0:77ca32e8e04e 140 DirHandle *FATFileSystem::opendir(const char *name) {
pierreprovent 0:77ca32e8e04e 141 FATFS_DIR dir;
pierreprovent 0:77ca32e8e04e 142 FRESULT res = f_opendir(&dir, name);
pierreprovent 0:77ca32e8e04e 143 if (res != 0) {
pierreprovent 0:77ca32e8e04e 144 return NULL;
pierreprovent 0:77ca32e8e04e 145 }
pierreprovent 0:77ca32e8e04e 146 return new FATDirHandle(dir);
pierreprovent 0:77ca32e8e04e 147 }
pierreprovent 0:77ca32e8e04e 148
pierreprovent 0:77ca32e8e04e 149 int FATFileSystem::open(DirHandle **dir, const char *name) {
pierreprovent 0:77ca32e8e04e 150 DirHandle *temp = opendir(name);
pierreprovent 0:77ca32e8e04e 151 if (!temp) {
pierreprovent 0:77ca32e8e04e 152 return -1;
pierreprovent 0:77ca32e8e04e 153 }
pierreprovent 0:77ca32e8e04e 154
pierreprovent 0:77ca32e8e04e 155 *dir = temp;
pierreprovent 0:77ca32e8e04e 156 return 0;
pierreprovent 0:77ca32e8e04e 157 }
pierreprovent 0:77ca32e8e04e 158
pierreprovent 0:77ca32e8e04e 159 int FATFileSystem::mkdir(const char *name, mode_t mode) {
pierreprovent 0:77ca32e8e04e 160 FRESULT res = f_mkdir(name);
pierreprovent 0:77ca32e8e04e 161 return res == 0 ? 0 : -1;
pierreprovent 0:77ca32e8e04e 162 }
pierreprovent 0:77ca32e8e04e 163
pierreprovent 0:77ca32e8e04e 164 int FATFileSystem::mount() {
pierreprovent 0:77ca32e8e04e 165 FRESULT res = f_mount(&_fs, _fsid, 1);
pierreprovent 0:77ca32e8e04e 166 return res == 0 ? 0 : -1;
pierreprovent 0:77ca32e8e04e 167 }
pierreprovent 0:77ca32e8e04e 168
pierreprovent 0:77ca32e8e04e 169 int FATFileSystem::unmount() {
pierreprovent 0:77ca32e8e04e 170 if (disk_sync())
pierreprovent 0:77ca32e8e04e 171 return -1;
pierreprovent 0:77ca32e8e04e 172 FRESULT res = f_mount(NULL, _fsid, 0);
pierreprovent 0:77ca32e8e04e 173 return res == 0 ? 0 : -1;
pierreprovent 0:77ca32e8e04e 174 }