Mark Schwarzer / SDFileSystem_A8

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FATFileSystem/FATFileSystem.cpp@0:a9d72fcb5d03, 2020-11-17 (annotated)

Committer:
markschwarzer
Date:
Tue Nov 17 20:28:59 2020 +0000
Revision:
0:a9d72fcb5d03
logs gps data to SD card

Who changed what in which revision?

UserRevisionLine numberNew contents of line
markschwarzer 0:a9d72fcb5d03 1 /* mbed Microcontroller Library
markschwarzer 0:a9d72fcb5d03 2 * Copyright (c) 2006-2012 ARM Limited
markschwarzer 0:a9d72fcb5d03 3 *
markschwarzer 0:a9d72fcb5d03 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
markschwarzer 0:a9d72fcb5d03 5 * of this software and associated documentation files (the "Software"), to deal
markschwarzer 0:a9d72fcb5d03 6 * in the Software without restriction, including without limitation the rights
markschwarzer 0:a9d72fcb5d03 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
markschwarzer 0:a9d72fcb5d03 8 * copies of the Software, and to permit persons to whom the Software is
markschwarzer 0:a9d72fcb5d03 9 * furnished to do so, subject to the following conditions:
markschwarzer 0:a9d72fcb5d03 10 *
markschwarzer 0:a9d72fcb5d03 11 * The above copyright notice and this permission notice shall be included in
markschwarzer 0:a9d72fcb5d03 12 * all copies or substantial portions of the Software.
markschwarzer 0:a9d72fcb5d03 13 *
markschwarzer 0:a9d72fcb5d03 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
markschwarzer 0:a9d72fcb5d03 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
markschwarzer 0:a9d72fcb5d03 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
markschwarzer 0:a9d72fcb5d03 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
markschwarzer 0:a9d72fcb5d03 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
markschwarzer 0:a9d72fcb5d03 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
markschwarzer 0:a9d72fcb5d03 20 * SOFTWARE.
markschwarzer 0:a9d72fcb5d03 21 */
markschwarzer 0:a9d72fcb5d03 22 #include "mbed.h"
markschwarzer 0:a9d72fcb5d03 23
markschwarzer 0:a9d72fcb5d03 24 #include "ffconf.h"
markschwarzer 0:a9d72fcb5d03 25 #include "mbed_debug.h"
markschwarzer 0:a9d72fcb5d03 26
markschwarzer 0:a9d72fcb5d03 27 #include "FATFileSystem.h"
markschwarzer 0:a9d72fcb5d03 28 #include "FATFileHandle.h"
markschwarzer 0:a9d72fcb5d03 29 #include "FATDirHandle.h"
markschwarzer 0:a9d72fcb5d03 30
markschwarzer 0:a9d72fcb5d03 31 DWORD get_fattime(void) {
markschwarzer 0:a9d72fcb5d03 32 time_t rawtime;
markschwarzer 0:a9d72fcb5d03 33 time(&rawtime);
markschwarzer 0:a9d72fcb5d03 34 struct tm *ptm = localtime(&rawtime);
markschwarzer 0:a9d72fcb5d03 35 return (DWORD)(ptm->tm_year - 80) << 25
markschwarzer 0:a9d72fcb5d03 36 | (DWORD)(ptm->tm_mon + 1 ) << 21
markschwarzer 0:a9d72fcb5d03 37 | (DWORD)(ptm->tm_mday ) << 16
markschwarzer 0:a9d72fcb5d03 38 | (DWORD)(ptm->tm_hour ) << 11
markschwarzer 0:a9d72fcb5d03 39 | (DWORD)(ptm->tm_min ) << 5
markschwarzer 0:a9d72fcb5d03 40 | (DWORD)(ptm->tm_sec/2 );
markschwarzer 0:a9d72fcb5d03 41 }
markschwarzer 0:a9d72fcb5d03 42
markschwarzer 0:a9d72fcb5d03 43 FATFileSystem *FATFileSystem::_ffs[_VOLUMES] = {0};
markschwarzer 0:a9d72fcb5d03 44
markschwarzer 0:a9d72fcb5d03 45 FATFileSystem::FATFileSystem(const char* n) : FileSystemLike(n) {
markschwarzer 0:a9d72fcb5d03 46 debug_if(FFS_DBG, "FATFileSystem(%s)\n", n);
markschwarzer 0:a9d72fcb5d03 47 for(int i=0; i<_VOLUMES; i++) {
markschwarzer 0:a9d72fcb5d03 48 if(_ffs[i] == 0) {
markschwarzer 0:a9d72fcb5d03 49 _ffs[i] = this;
markschwarzer 0:a9d72fcb5d03 50 _fsid[0] = '0' + i;
markschwarzer 0:a9d72fcb5d03 51 _fsid[1] = '\0';
markschwarzer 0:a9d72fcb5d03 52 debug_if(FFS_DBG, "Mounting [%s] on ffs drive [%s]\n", getName(), _fsid);
markschwarzer 0:a9d72fcb5d03 53 f_mount(&_fs, _fsid, 0);
markschwarzer 0:a9d72fcb5d03 54 return;
markschwarzer 0:a9d72fcb5d03 55 }
markschwarzer 0:a9d72fcb5d03 56 }
markschwarzer 0:a9d72fcb5d03 57 error("Couldn't create %s in FATFileSystem::FATFileSystem\n", n);
markschwarzer 0:a9d72fcb5d03 58 }
markschwarzer 0:a9d72fcb5d03 59
markschwarzer 0:a9d72fcb5d03 60 FATFileSystem::~FATFileSystem() {
markschwarzer 0:a9d72fcb5d03 61 for (int i=0; i<_VOLUMES; i++) {
markschwarzer 0:a9d72fcb5d03 62 if (_ffs[i] == this) {
markschwarzer 0:a9d72fcb5d03 63 _ffs[i] = 0;
markschwarzer 0:a9d72fcb5d03 64 f_mount(NULL, _fsid, 0);
markschwarzer 0:a9d72fcb5d03 65 }
markschwarzer 0:a9d72fcb5d03 66 }
markschwarzer 0:a9d72fcb5d03 67 }
markschwarzer 0:a9d72fcb5d03 68
markschwarzer 0:a9d72fcb5d03 69 FileHandle *FATFileSystem::open(const char* name, int flags) {
markschwarzer 0:a9d72fcb5d03 70 debug_if(FFS_DBG, "open(%s) on filesystem [%s], drv [%s]\n", name, getName(), _fsid);
markschwarzer 0:a9d72fcb5d03 71 char n[64];
markschwarzer 0:a9d72fcb5d03 72 sprintf(n, "%s:/%s", _fsid, name);
markschwarzer 0:a9d72fcb5d03 73
markschwarzer 0:a9d72fcb5d03 74 /* POSIX flags -> FatFS open mode */
markschwarzer 0:a9d72fcb5d03 75 BYTE openmode;
markschwarzer 0:a9d72fcb5d03 76 if (flags & O_RDWR) {
markschwarzer 0:a9d72fcb5d03 77 openmode = FA_READ|FA_WRITE;
markschwarzer 0:a9d72fcb5d03 78 } else if(flags & O_WRONLY) {
markschwarzer 0:a9d72fcb5d03 79 openmode = FA_WRITE;
markschwarzer 0:a9d72fcb5d03 80 } else {
markschwarzer 0:a9d72fcb5d03 81 openmode = FA_READ;
markschwarzer 0:a9d72fcb5d03 82 }
markschwarzer 0:a9d72fcb5d03 83 if(flags & O_CREAT) {
markschwarzer 0:a9d72fcb5d03 84 if(flags & O_TRUNC) {
markschwarzer 0:a9d72fcb5d03 85 openmode |= FA_CREATE_ALWAYS;
markschwarzer 0:a9d72fcb5d03 86 } else {
markschwarzer 0:a9d72fcb5d03 87 openmode |= FA_OPEN_ALWAYS;
markschwarzer 0:a9d72fcb5d03 88 }
markschwarzer 0:a9d72fcb5d03 89 }
markschwarzer 0:a9d72fcb5d03 90
markschwarzer 0:a9d72fcb5d03 91 FIL fh;
markschwarzer 0:a9d72fcb5d03 92 FRESULT res = f_open(&fh, n, openmode);
markschwarzer 0:a9d72fcb5d03 93 if (res) {
markschwarzer 0:a9d72fcb5d03 94 debug_if(FFS_DBG, "f_open('w') failed: %d\n", res);
markschwarzer 0:a9d72fcb5d03 95 return NULL;
markschwarzer 0:a9d72fcb5d03 96 }
markschwarzer 0:a9d72fcb5d03 97 if (flags & O_APPEND) {
markschwarzer 0:a9d72fcb5d03 98 f_lseek(&fh, fh.fsize);
markschwarzer 0:a9d72fcb5d03 99 }
markschwarzer 0:a9d72fcb5d03 100 return new FATFileHandle(fh);
markschwarzer 0:a9d72fcb5d03 101 }
markschwarzer 0:a9d72fcb5d03 102
markschwarzer 0:a9d72fcb5d03 103 int FATFileSystem::open(FileHandle **file, const char *name, int flags) {
markschwarzer 0:a9d72fcb5d03 104 FileHandle *temp = open(name, flags);
markschwarzer 0:a9d72fcb5d03 105 if (!temp) {
markschwarzer 0:a9d72fcb5d03 106 return -1;
markschwarzer 0:a9d72fcb5d03 107 }
markschwarzer 0:a9d72fcb5d03 108
markschwarzer 0:a9d72fcb5d03 109 *file = temp;
markschwarzer 0:a9d72fcb5d03 110 return 0;
markschwarzer 0:a9d72fcb5d03 111 }
markschwarzer 0:a9d72fcb5d03 112
markschwarzer 0:a9d72fcb5d03 113 int FATFileSystem::remove(const char *filename) {
markschwarzer 0:a9d72fcb5d03 114 FRESULT res = f_unlink(filename);
markschwarzer 0:a9d72fcb5d03 115 if (res) {
markschwarzer 0:a9d72fcb5d03 116 debug_if(FFS_DBG, "f_unlink() failed: %d\n", res);
markschwarzer 0:a9d72fcb5d03 117 return -1;
markschwarzer 0:a9d72fcb5d03 118 }
markschwarzer 0:a9d72fcb5d03 119 return 0;
markschwarzer 0:a9d72fcb5d03 120 }
markschwarzer 0:a9d72fcb5d03 121
markschwarzer 0:a9d72fcb5d03 122 int FATFileSystem::rename(const char *oldname, const char *newname) {
markschwarzer 0:a9d72fcb5d03 123 FRESULT res = f_rename(oldname, newname);
markschwarzer 0:a9d72fcb5d03 124 if (res) {
markschwarzer 0:a9d72fcb5d03 125 debug_if(FFS_DBG, "f_rename() failed: %d\n", res);
markschwarzer 0:a9d72fcb5d03 126 return -1;
markschwarzer 0:a9d72fcb5d03 127 }
markschwarzer 0:a9d72fcb5d03 128 return 0;
markschwarzer 0:a9d72fcb5d03 129 }
markschwarzer 0:a9d72fcb5d03 130
markschwarzer 0:a9d72fcb5d03 131 int FATFileSystem::format() {
markschwarzer 0:a9d72fcb5d03 132 FRESULT res = f_mkfs(_fsid, 0, 512); // Logical drive number, Partitioning rule, Allocation unit size (bytes per cluster)
markschwarzer 0:a9d72fcb5d03 133 if (res) {
markschwarzer 0:a9d72fcb5d03 134 debug_if(FFS_DBG, "f_mkfs() failed: %d\n", res);
markschwarzer 0:a9d72fcb5d03 135 return -1;
markschwarzer 0:a9d72fcb5d03 136 }
markschwarzer 0:a9d72fcb5d03 137 return 0;
markschwarzer 0:a9d72fcb5d03 138 }
markschwarzer 0:a9d72fcb5d03 139
markschwarzer 0:a9d72fcb5d03 140 DirHandle *FATFileSystem::opendir(const char *name) {
markschwarzer 0:a9d72fcb5d03 141 FATFS_DIR dir;
markschwarzer 0:a9d72fcb5d03 142 FRESULT res = f_opendir(&dir, name);
markschwarzer 0:a9d72fcb5d03 143 if (res != 0) {
markschwarzer 0:a9d72fcb5d03 144 return NULL;
markschwarzer 0:a9d72fcb5d03 145 }
markschwarzer 0:a9d72fcb5d03 146 return new FATDirHandle(dir);
markschwarzer 0:a9d72fcb5d03 147 }
markschwarzer 0:a9d72fcb5d03 148
markschwarzer 0:a9d72fcb5d03 149 int FATFileSystem::open(DirHandle **dir, const char *name) {
markschwarzer 0:a9d72fcb5d03 150 DirHandle *temp = opendir(name);
markschwarzer 0:a9d72fcb5d03 151 if (!temp) {
markschwarzer 0:a9d72fcb5d03 152 return -1;
markschwarzer 0:a9d72fcb5d03 153 }
markschwarzer 0:a9d72fcb5d03 154
markschwarzer 0:a9d72fcb5d03 155 *dir = temp;
markschwarzer 0:a9d72fcb5d03 156 return 0;
markschwarzer 0:a9d72fcb5d03 157 }
markschwarzer 0:a9d72fcb5d03 158
markschwarzer 0:a9d72fcb5d03 159 int FATFileSystem::mkdir(const char *name, mode_t mode) {
markschwarzer 0:a9d72fcb5d03 160 FRESULT res = f_mkdir(name);
markschwarzer 0:a9d72fcb5d03 161 return res == 0 ? 0 : -1;
markschwarzer 0:a9d72fcb5d03 162 }
markschwarzer 0:a9d72fcb5d03 163
markschwarzer 0:a9d72fcb5d03 164 int FATFileSystem::mount() {
markschwarzer 0:a9d72fcb5d03 165 FRESULT res = f_mount(&_fs, _fsid, 1);
markschwarzer 0:a9d72fcb5d03 166 return res == 0 ? 0 : -1;
markschwarzer 0:a9d72fcb5d03 167 }
markschwarzer 0:a9d72fcb5d03 168
markschwarzer 0:a9d72fcb5d03 169 int FATFileSystem::unmount() {
markschwarzer 0:a9d72fcb5d03 170 if (disk_sync())
markschwarzer 0:a9d72fcb5d03 171 return -1;
markschwarzer 0:a9d72fcb5d03 172 FRESULT res = f_mount(NULL, _fsid, 0);
markschwarzer 0:a9d72fcb5d03 173 return res == 0 ? 0 : -1;
markschwarzer 0:a9d72fcb5d03 174 }