Bayley Wang / FATFileSystem

modified version using external RTC for timestamps

Fork of FATFileSystem by mbed official

FATFileSystem.cpp@12:67250f8df758, 2018-01-29 (annotated)

Committer:
bwang
Date:
Mon Jan 29 09:41:35 2018 +0000
Revision:
12:67250f8df758
Parent:
11:3992ff7dc7dc 
get_fattime() uses external BNO55 object to get time

Who changed what in which revision?

UserRevisionLine numberNew contents of line
emilmont 1:46ce1e16c870 1 /* mbed Microcontroller Library
emilmont 1:46ce1e16c870 2 * Copyright (c) 2006-2012 ARM Limited
emilmont 1:46ce1e16c870 3 *
emilmont 1:46ce1e16c870 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
emilmont 1:46ce1e16c870 5 * of this software and associated documentation files (the "Software"), to deal
emilmont 1:46ce1e16c870 6 * in the Software without restriction, including without limitation the rights
emilmont 1:46ce1e16c870 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
emilmont 1:46ce1e16c870 8 * copies of the Software, and to permit persons to whom the Software is
emilmont 1:46ce1e16c870 9 * furnished to do so, subject to the following conditions:
emilmont 1:46ce1e16c870 10 *
emilmont 1:46ce1e16c870 11 * The above copyright notice and this permission notice shall be included in
emilmont 1:46ce1e16c870 12 * all copies or substantial portions of the Software.
emilmont 1:46ce1e16c870 13 *
emilmont 1:46ce1e16c870 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
emilmont 1:46ce1e16c870 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
emilmont 1:46ce1e16c870 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
emilmont 1:46ce1e16c870 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
emilmont 1:46ce1e16c870 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
emilmont 1:46ce1e16c870 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
emilmont 1:46ce1e16c870 20 * SOFTWARE.
emilmont 1:46ce1e16c870 21 */
emilmont 1:46ce1e16c870 22 #include "mbed.h"
emilmont 1:46ce1e16c870 23
emilmont 1:46ce1e16c870 24 #include "ffconf.h"
emilmont 2:b6669c987c8e 25 #include "mbed_debug.h"
emilmont 1:46ce1e16c870 26
bwang 11:3992ff7dc7dc 27 #include "DS1307.h"
bwang 11:3992ff7dc7dc 28 #include "rtc_define.h"
bwang 11:3992ff7dc7dc 29
emilmont 1:46ce1e16c870 30 #include "FATFileSystem.h"
emilmont 1:46ce1e16c870 31 #include "FATFileHandle.h"
emilmont 1:46ce1e16c870 32 #include "FATDirHandle.h"
emilmont 1:46ce1e16c870 33
emilmont 1:46ce1e16c870 34 DWORD get_fattime(void) {
emilmont 1:46ce1e16c870 35 time_t rawtime;
bwang 12:67250f8df758 36
bwang 11:3992ff7dc7dc 37 rawtime = rtc->now().unixtime();
emilmont 1:46ce1e16c870 38 struct tm *ptm = localtime(&rawtime);
emilmont 1:46ce1e16c870 39 return (DWORD)(ptm->tm_year - 80) << 25
emilmont 1:46ce1e16c870 40 | (DWORD)(ptm->tm_mon + 1 ) << 21
emilmont 1:46ce1e16c870 41 | (DWORD)(ptm->tm_mday ) << 16
emilmont 1:46ce1e16c870 42 | (DWORD)(ptm->tm_hour ) << 11
emilmont 1:46ce1e16c870 43 | (DWORD)(ptm->tm_min ) << 5
emilmont 1:46ce1e16c870 44 | (DWORD)(ptm->tm_sec/2 );
emilmont 1:46ce1e16c870 45 }
emilmont 1:46ce1e16c870 46
emilmont 1:46ce1e16c870 47 FATFileSystem *FATFileSystem::_ffs[_VOLUMES] = {0};
emilmont 1:46ce1e16c870 48
emilmont 1:46ce1e16c870 49 FATFileSystem::FATFileSystem(const char* n) : FileSystemLike(n) {
emilmont 1:46ce1e16c870 50 debug_if(FFS_DBG, "FATFileSystem(%s)\n", n);
emilmont 1:46ce1e16c870 51 for(int i=0; i<_VOLUMES; i++) {
emilmont 1:46ce1e16c870 52 if(_ffs[i] == 0) {
emilmont 1:46ce1e16c870 53 _ffs[i] = this;
mbed_official 5:b3b3370574cf 54 _fsid[0] = '0' + i;
mbed_official 5:b3b3370574cf 55 _fsid[1] = '\0';
p3p 9:e2ab678eb692 56 debug_if(FFS_DBG, "Mounting [%s] on ffs drive [%s]\n", getName(), _fsid);
mbed_official 5:b3b3370574cf 57 f_mount(&_fs, _fsid, 0);
emilmont 1:46ce1e16c870 58 return;
emilmont 1:46ce1e16c870 59 }
emilmont 1:46ce1e16c870 60 }
emilmont 1:46ce1e16c870 61 error("Couldn't create %s in FATFileSystem::FATFileSystem\n", n);
emilmont 1:46ce1e16c870 62 }
emilmont 1:46ce1e16c870 63
emilmont 1:46ce1e16c870 64 FATFileSystem::~FATFileSystem() {
emilmont 1:46ce1e16c870 65 for (int i=0; i<_VOLUMES; i++) {
emilmont 1:46ce1e16c870 66 if (_ffs[i] == this) {
emilmont 1:46ce1e16c870 67 _ffs[i] = 0;
mbed_official 5:b3b3370574cf 68 f_mount(NULL, _fsid, 0);
emilmont 1:46ce1e16c870 69 }
emilmont 1:46ce1e16c870 70 }
emilmont 1:46ce1e16c870 71 }
emilmont 1:46ce1e16c870 72
emilmont 1:46ce1e16c870 73 FileHandle *FATFileSystem::open(const char* name, int flags) {
p3p 9:e2ab678eb692 74 debug_if(FFS_DBG, "open(%s) on filesystem [%s], drv [%s]\n", name, getName(), _fsid);
emilmont 1:46ce1e16c870 75 char n[64];
mbed_official 5:b3b3370574cf 76 sprintf(n, "%s:/%s", _fsid, name);
mbed_official 4:3ff2606d5713 77
emilmont 1:46ce1e16c870 78 /* POSIX flags -> FatFS open mode */
emilmont 1:46ce1e16c870 79 BYTE openmode;
emilmont 1:46ce1e16c870 80 if (flags & O_RDWR) {
emilmont 1:46ce1e16c870 81 openmode = FA_READ|FA_WRITE;
emilmont 1:46ce1e16c870 82 } else if(flags & O_WRONLY) {
emilmont 1:46ce1e16c870 83 openmode = FA_WRITE;
emilmont 1:46ce1e16c870 84 } else {
emilmont 1:46ce1e16c870 85 openmode = FA_READ;
emilmont 1:46ce1e16c870 86 }
emilmont 1:46ce1e16c870 87 if(flags & O_CREAT) {
emilmont 1:46ce1e16c870 88 if(flags & O_TRUNC) {
emilmont 1:46ce1e16c870 89 openmode |= FA_CREATE_ALWAYS;
emilmont 1:46ce1e16c870 90 } else {
emilmont 1:46ce1e16c870 91 openmode |= FA_OPEN_ALWAYS;
emilmont 1:46ce1e16c870 92 }
emilmont 1:46ce1e16c870 93 }
mbed_official 4:3ff2606d5713 94
emilmont 1:46ce1e16c870 95 FIL fh;
emilmont 1:46ce1e16c870 96 FRESULT res = f_open(&fh, n, openmode);
mbed_official 4:3ff2606d5713 97 if (res) {
emilmont 1:46ce1e16c870 98 debug_if(FFS_DBG, "f_open('w') failed: %d\n", res);
emilmont 1:46ce1e16c870 99 return NULL;
emilmont 1:46ce1e16c870 100 }
emilmont 1:46ce1e16c870 101 if (flags & O_APPEND) {
emilmont 1:46ce1e16c870 102 f_lseek(&fh, fh.fsize);
emilmont 1:46ce1e16c870 103 }
emilmont 1:46ce1e16c870 104 return new FATFileHandle(fh);
emilmont 1:46ce1e16c870 105 }
mbed_official 4:3ff2606d5713 106
emilmont 1:46ce1e16c870 107 int FATFileSystem::remove(const char *filename) {
emilmont 1:46ce1e16c870 108 FRESULT res = f_unlink(filename);
mbed_official 4:3ff2606d5713 109 if (res) {
emilmont 1:46ce1e16c870 110 debug_if(FFS_DBG, "f_unlink() failed: %d\n", res);
emilmont 1:46ce1e16c870 111 return -1;
emilmont 1:46ce1e16c870 112 }
emilmont 1:46ce1e16c870 113 return 0;
emilmont 1:46ce1e16c870 114 }
emilmont 1:46ce1e16c870 115
mbed_official 4:3ff2606d5713 116 int FATFileSystem::rename(const char *oldname, const char *newname) {
mbed_official 4:3ff2606d5713 117 FRESULT res = f_rename(oldname, newname);
mbed_official 4:3ff2606d5713 118 if (res) {
mbed_official 4:3ff2606d5713 119 debug_if(FFS_DBG, "f_rename() failed: %d\n", res);
mbed_official 4:3ff2606d5713 120 return -1;
mbed_official 4:3ff2606d5713 121 }
mbed_official 4:3ff2606d5713 122 return 0;
mbed_official 4:3ff2606d5713 123 }
mbed_official 4:3ff2606d5713 124
emilmont 1:46ce1e16c870 125 int FATFileSystem::format() {
emilmont 1:46ce1e16c870 126 FRESULT res = f_mkfs(_fsid, 0, 512); // Logical drive number, Partitioning rule, Allocation unit size (bytes per cluster)
emilmont 1:46ce1e16c870 127 if (res) {
emilmont 1:46ce1e16c870 128 debug_if(FFS_DBG, "f_mkfs() failed: %d\n", res);
emilmont 1:46ce1e16c870 129 return -1;
emilmont 1:46ce1e16c870 130 }
emilmont 1:46ce1e16c870 131 return 0;
emilmont 1:46ce1e16c870 132 }
emilmont 1:46ce1e16c870 133
emilmont 1:46ce1e16c870 134 DirHandle *FATFileSystem::opendir(const char *name) {
emilmont 1:46ce1e16c870 135 FATFS_DIR dir;
emilmont 1:46ce1e16c870 136 FRESULT res = f_opendir(&dir, name);
emilmont 1:46ce1e16c870 137 if (res != 0) {
emilmont 1:46ce1e16c870 138 return NULL;
emilmont 1:46ce1e16c870 139 }
emilmont 1:46ce1e16c870 140 return new FATDirHandle(dir);
emilmont 1:46ce1e16c870 141 }
emilmont 1:46ce1e16c870 142
emilmont 1:46ce1e16c870 143 int FATFileSystem::mkdir(const char *name, mode_t mode) {
emilmont 1:46ce1e16c870 144 FRESULT res = f_mkdir(name);
emilmont 1:46ce1e16c870 145 return res == 0 ? 0 : -1;
emilmont 1:46ce1e16c870 146 }
mbed_official 4:3ff2606d5713 147
mbed_official 4:3ff2606d5713 148 int FATFileSystem::mount() {
mbed_official 5:b3b3370574cf 149 FRESULT res = f_mount(&_fs, _fsid, 1);
mbed_official 4:3ff2606d5713 150 return res == 0 ? 0 : -1;
mbed_official 4:3ff2606d5713 151 }
mbed_official 4:3ff2606d5713 152
mbed_official 4:3ff2606d5713 153 int FATFileSystem::unmount() {
mbed_official 4:3ff2606d5713 154 if (disk_sync())
mbed_official 4:3ff2606d5713 155 return -1;
mbed_official 5:b3b3370574cf 156 FRESULT res = f_mount(NULL, _fsid, 0);
mbed_official 4:3ff2606d5713 157 return res == 0 ? 0 : -1;
mbed_official 4:3ff2606d5713 158 }