Kotachi Liu / SDFileSystem

SD card data log

Dependents:   riset_Datalogger

FATFileSystem/FATFileSystem.cpp@0:18d80d7403d3, 2019-11-03 (annotated)

Committer:
kotachi
Date:
Sun Nov 03 07:28:09 2019 +0000
Revision:
0:18d80d7403d3
SD card logging system

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kotachi 0:18d80d7403d3 1 /* mbed Microcontroller Library
kotachi 0:18d80d7403d3 2 * Copyright (c) 2006-2012 ARM Limited
kotachi 0:18d80d7403d3 3 *
kotachi 0:18d80d7403d3 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
kotachi 0:18d80d7403d3 5 * of this software and associated documentation files (the "Software"), to deal
kotachi 0:18d80d7403d3 6 * in the Software without restriction, including without limitation the rights
kotachi 0:18d80d7403d3 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
kotachi 0:18d80d7403d3 8 * copies of the Software, and to permit persons to whom the Software is
kotachi 0:18d80d7403d3 9 * furnished to do so, subject to the following conditions:
kotachi 0:18d80d7403d3 10 *
kotachi 0:18d80d7403d3 11 * The above copyright notice and this permission notice shall be included in
kotachi 0:18d80d7403d3 12 * all copies or substantial portions of the Software.
kotachi 0:18d80d7403d3 13 *
kotachi 0:18d80d7403d3 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
kotachi 0:18d80d7403d3 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
kotachi 0:18d80d7403d3 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
kotachi 0:18d80d7403d3 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
kotachi 0:18d80d7403d3 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
kotachi 0:18d80d7403d3 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
kotachi 0:18d80d7403d3 20 * SOFTWARE.
kotachi 0:18d80d7403d3 21 */
kotachi 0:18d80d7403d3 22 #include "mbed.h"
kotachi 0:18d80d7403d3 23
kotachi 0:18d80d7403d3 24 #include "ffconf.h"
kotachi 0:18d80d7403d3 25 #include "mbed_debug.h"
kotachi 0:18d80d7403d3 26
kotachi 0:18d80d7403d3 27 #include "FATFileSystem.h"
kotachi 0:18d80d7403d3 28 #include "FATFileHandle.h"
kotachi 0:18d80d7403d3 29 #include "FATDirHandle.h"
kotachi 0:18d80d7403d3 30
kotachi 0:18d80d7403d3 31 DWORD get_fattime(void) {
kotachi 0:18d80d7403d3 32 time_t rawtime;
kotachi 0:18d80d7403d3 33 time(&rawtime);
kotachi 0:18d80d7403d3 34 struct tm *ptm = localtime(&rawtime);
kotachi 0:18d80d7403d3 35 return (DWORD)(ptm->tm_year - 80) << 25
kotachi 0:18d80d7403d3 36 | (DWORD)(ptm->tm_mon + 1 ) << 21
kotachi 0:18d80d7403d3 37 | (DWORD)(ptm->tm_mday ) << 16
kotachi 0:18d80d7403d3 38 | (DWORD)(ptm->tm_hour ) << 11
kotachi 0:18d80d7403d3 39 | (DWORD)(ptm->tm_min ) << 5
kotachi 0:18d80d7403d3 40 | (DWORD)(ptm->tm_sec/2 );
kotachi 0:18d80d7403d3 41 }
kotachi 0:18d80d7403d3 42
kotachi 0:18d80d7403d3 43 FATFileSystem *FATFileSystem::_ffs[_VOLUMES] = {0};
kotachi 0:18d80d7403d3 44
kotachi 0:18d80d7403d3 45 FATFileSystem::FATFileSystem(const char* n) : FileSystemLike(n) {
kotachi 0:18d80d7403d3 46 debug_if(FFS_DBG, "FATFileSystem(%s)\n", n);
kotachi 0:18d80d7403d3 47 for(int i=0; i<_VOLUMES; i++) {
kotachi 0:18d80d7403d3 48 if(_ffs[i] == 0) {
kotachi 0:18d80d7403d3 49 _ffs[i] = this;
kotachi 0:18d80d7403d3 50 _fsid[0] = '0' + i;
kotachi 0:18d80d7403d3 51 _fsid[1] = '\0';
kotachi 0:18d80d7403d3 52 debug_if(FFS_DBG, "Mounting [%s] on ffs drive [%s]\n", getName(), _fsid);
kotachi 0:18d80d7403d3 53 f_mount(&_fs, _fsid, 0);
kotachi 0:18d80d7403d3 54 return;
kotachi 0:18d80d7403d3 55 }
kotachi 0:18d80d7403d3 56 }
kotachi 0:18d80d7403d3 57 error("Couldn't create %s in FATFileSystem::FATFileSystem\n", n);
kotachi 0:18d80d7403d3 58 }
kotachi 0:18d80d7403d3 59
kotachi 0:18d80d7403d3 60 FATFileSystem::~FATFileSystem() {
kotachi 0:18d80d7403d3 61 for (int i=0; i<_VOLUMES; i++) {
kotachi 0:18d80d7403d3 62 if (_ffs[i] == this) {
kotachi 0:18d80d7403d3 63 _ffs[i] = 0;
kotachi 0:18d80d7403d3 64 f_mount(NULL, _fsid, 0);
kotachi 0:18d80d7403d3 65 }
kotachi 0:18d80d7403d3 66 }
kotachi 0:18d80d7403d3 67 }
kotachi 0:18d80d7403d3 68
kotachi 0:18d80d7403d3 69 FileHandle *FATFileSystem::open(const char* name, int flags) {
kotachi 0:18d80d7403d3 70 debug_if(FFS_DBG, "open(%s) on filesystem [%s], drv [%s]\n", name, getName(), _fsid);
kotachi 0:18d80d7403d3 71 char n[64];
kotachi 0:18d80d7403d3 72 sprintf(n, "%s:/%s", _fsid, name);
kotachi 0:18d80d7403d3 73
kotachi 0:18d80d7403d3 74 /* POSIX flags -> FatFS open mode */
kotachi 0:18d80d7403d3 75 BYTE openmode;
kotachi 0:18d80d7403d3 76 if (flags & O_RDWR) {
kotachi 0:18d80d7403d3 77 openmode = FA_READ|FA_WRITE;
kotachi 0:18d80d7403d3 78 } else if(flags & O_WRONLY) {
kotachi 0:18d80d7403d3 79 openmode = FA_WRITE;
kotachi 0:18d80d7403d3 80 } else {
kotachi 0:18d80d7403d3 81 openmode = FA_READ;
kotachi 0:18d80d7403d3 82 }
kotachi 0:18d80d7403d3 83 if(flags & O_CREAT) {
kotachi 0:18d80d7403d3 84 if(flags & O_TRUNC) {
kotachi 0:18d80d7403d3 85 openmode |= FA_CREATE_ALWAYS;
kotachi 0:18d80d7403d3 86 } else {
kotachi 0:18d80d7403d3 87 openmode |= FA_OPEN_ALWAYS;
kotachi 0:18d80d7403d3 88 }
kotachi 0:18d80d7403d3 89 }
kotachi 0:18d80d7403d3 90
kotachi 0:18d80d7403d3 91 FIL fh;
kotachi 0:18d80d7403d3 92 FRESULT res = f_open(&fh, n, openmode);
kotachi 0:18d80d7403d3 93 if (res) {
kotachi 0:18d80d7403d3 94 debug_if(FFS_DBG, "f_open('w') failed: %d\n", res);
kotachi 0:18d80d7403d3 95 return NULL;
kotachi 0:18d80d7403d3 96 }
kotachi 0:18d80d7403d3 97 if (flags & O_APPEND) {
kotachi 0:18d80d7403d3 98 f_lseek(&fh, fh.fsize);
kotachi 0:18d80d7403d3 99 }
kotachi 0:18d80d7403d3 100 return new FATFileHandle(fh);
kotachi 0:18d80d7403d3 101 }
kotachi 0:18d80d7403d3 102
kotachi 0:18d80d7403d3 103 int FATFileSystem::open(FileHandle **file, const char *name, int flags) {
kotachi 0:18d80d7403d3 104 FileHandle *temp = open(name, flags);
kotachi 0:18d80d7403d3 105 if (!temp) {
kotachi 0:18d80d7403d3 106 return -1;
kotachi 0:18d80d7403d3 107 }
kotachi 0:18d80d7403d3 108
kotachi 0:18d80d7403d3 109 *file = temp;
kotachi 0:18d80d7403d3 110 return 0;
kotachi 0:18d80d7403d3 111 }
kotachi 0:18d80d7403d3 112
kotachi 0:18d80d7403d3 113 int FATFileSystem::remove(const char *filename) {
kotachi 0:18d80d7403d3 114 FRESULT res = f_unlink(filename);
kotachi 0:18d80d7403d3 115 if (res) {
kotachi 0:18d80d7403d3 116 debug_if(FFS_DBG, "f_unlink() failed: %d\n", res);
kotachi 0:18d80d7403d3 117 return -1;
kotachi 0:18d80d7403d3 118 }
kotachi 0:18d80d7403d3 119 return 0;
kotachi 0:18d80d7403d3 120 }
kotachi 0:18d80d7403d3 121
kotachi 0:18d80d7403d3 122 int FATFileSystem::rename(const char *oldname, const char *newname) {
kotachi 0:18d80d7403d3 123 FRESULT res = f_rename(oldname, newname);
kotachi 0:18d80d7403d3 124 if (res) {
kotachi 0:18d80d7403d3 125 debug_if(FFS_DBG, "f_rename() failed: %d\n", res);
kotachi 0:18d80d7403d3 126 return -1;
kotachi 0:18d80d7403d3 127 }
kotachi 0:18d80d7403d3 128 return 0;
kotachi 0:18d80d7403d3 129 }
kotachi 0:18d80d7403d3 130
kotachi 0:18d80d7403d3 131 int FATFileSystem::format() {
kotachi 0:18d80d7403d3 132 FRESULT res = f_mkfs(_fsid, 0, 512); // Logical drive number, Partitioning rule, Allocation unit size (bytes per cluster)
kotachi 0:18d80d7403d3 133 if (res) {
kotachi 0:18d80d7403d3 134 debug_if(FFS_DBG, "f_mkfs() failed: %d\n", res);
kotachi 0:18d80d7403d3 135 return -1;
kotachi 0:18d80d7403d3 136 }
kotachi 0:18d80d7403d3 137 return 0;
kotachi 0:18d80d7403d3 138 }
kotachi 0:18d80d7403d3 139
kotachi 0:18d80d7403d3 140 DirHandle *FATFileSystem::opendir(const char *name) {
kotachi 0:18d80d7403d3 141 FATFS_DIR dir;
kotachi 0:18d80d7403d3 142 FRESULT res = f_opendir(&dir, name);
kotachi 0:18d80d7403d3 143 if (res != 0) {
kotachi 0:18d80d7403d3 144 return NULL;
kotachi 0:18d80d7403d3 145 }
kotachi 0:18d80d7403d3 146 return new FATDirHandle(dir);
kotachi 0:18d80d7403d3 147 }
kotachi 0:18d80d7403d3 148
kotachi 0:18d80d7403d3 149 int FATFileSystem::open(DirHandle **dir, const char *name) {
kotachi 0:18d80d7403d3 150 DirHandle *temp = opendir(name);
kotachi 0:18d80d7403d3 151 if (!temp) {
kotachi 0:18d80d7403d3 152 return -1;
kotachi 0:18d80d7403d3 153 }
kotachi 0:18d80d7403d3 154
kotachi 0:18d80d7403d3 155 *dir = temp;
kotachi 0:18d80d7403d3 156 return 0;
kotachi 0:18d80d7403d3 157 }
kotachi 0:18d80d7403d3 158
kotachi 0:18d80d7403d3 159 int FATFileSystem::mkdir(const char *name, mode_t mode) {
kotachi 0:18d80d7403d3 160 FRESULT res = f_mkdir(name);
kotachi 0:18d80d7403d3 161 return res == 0 ? 0 : -1;
kotachi 0:18d80d7403d3 162 }
kotachi 0:18d80d7403d3 163
kotachi 0:18d80d7403d3 164 int FATFileSystem::mount() {
kotachi 0:18d80d7403d3 165 FRESULT res = f_mount(&_fs, _fsid, 1);
kotachi 0:18d80d7403d3 166 return res == 0 ? 0 : -1;
kotachi 0:18d80d7403d3 167 }
kotachi 0:18d80d7403d3 168
kotachi 0:18d80d7403d3 169 int FATFileSystem::unmount() {
kotachi 0:18d80d7403d3 170 if (disk_sync())
kotachi 0:18d80d7403d3 171 return -1;
kotachi 0:18d80d7403d3 172 FRESULT res = f_mount(NULL, _fsid, 0);
kotachi 0:18d80d7403d3 173 return res == 0 ? 0 : -1;
kotachi 0:18d80d7403d3 174 }