FFT LED Display / 4180_EditThis_copy_Demo_Test

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FATFileSystem/FATFileSystem.cpp@0:d6c9b09b4042, 2020-12-02 (annotated)

Committer:
annieluo2
Date:
Wed Dec 02 18:02:03 2020 +0000
Revision:
0:d6c9b09b4042
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annieluo2 0:d6c9b09b4042 1 /* mbed Microcontroller Library
annieluo2 0:d6c9b09b4042 2 * Copyright (c) 2006-2012 ARM Limited
annieluo2 0:d6c9b09b4042 3 *
annieluo2 0:d6c9b09b4042 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
annieluo2 0:d6c9b09b4042 5 * of this software and associated documentation files (the "Software"), to deal
annieluo2 0:d6c9b09b4042 6 * in the Software without restriction, including without limitation the rights
annieluo2 0:d6c9b09b4042 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
annieluo2 0:d6c9b09b4042 8 * copies of the Software, and to permit persons to whom the Software is
annieluo2 0:d6c9b09b4042 9 * furnished to do so, subject to the following conditions:
annieluo2 0:d6c9b09b4042 10 *
annieluo2 0:d6c9b09b4042 11 * The above copyright notice and this permission notice shall be included in
annieluo2 0:d6c9b09b4042 12 * all copies or substantial portions of the Software.
annieluo2 0:d6c9b09b4042 13 *
annieluo2 0:d6c9b09b4042 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
annieluo2 0:d6c9b09b4042 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
annieluo2 0:d6c9b09b4042 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
annieluo2 0:d6c9b09b4042 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
annieluo2 0:d6c9b09b4042 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
annieluo2 0:d6c9b09b4042 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
annieluo2 0:d6c9b09b4042 20 * SOFTWARE.
annieluo2 0:d6c9b09b4042 21 */
annieluo2 0:d6c9b09b4042 22 #include "mbed.h"
annieluo2 0:d6c9b09b4042 23
annieluo2 0:d6c9b09b4042 24 #include "ffconf.h"
annieluo2 0:d6c9b09b4042 25 #include "mbed_debug.h"
annieluo2 0:d6c9b09b4042 26
annieluo2 0:d6c9b09b4042 27 #include "FATFileSystem.h"
annieluo2 0:d6c9b09b4042 28 #include "FATFileHandle.h"
annieluo2 0:d6c9b09b4042 29 #include "FATDirHandle.h"
annieluo2 0:d6c9b09b4042 30
annieluo2 0:d6c9b09b4042 31 DWORD get_fattime(void) {
annieluo2 0:d6c9b09b4042 32 time_t rawtime;
annieluo2 0:d6c9b09b4042 33 time(&rawtime);
annieluo2 0:d6c9b09b4042 34 struct tm *ptm = localtime(&rawtime);
annieluo2 0:d6c9b09b4042 35 return (DWORD)(ptm->tm_year - 80) << 25
annieluo2 0:d6c9b09b4042 36 | (DWORD)(ptm->tm_mon + 1 ) << 21
annieluo2 0:d6c9b09b4042 37 | (DWORD)(ptm->tm_mday ) << 16
annieluo2 0:d6c9b09b4042 38 | (DWORD)(ptm->tm_hour ) << 11
annieluo2 0:d6c9b09b4042 39 | (DWORD)(ptm->tm_min ) << 5
annieluo2 0:d6c9b09b4042 40 | (DWORD)(ptm->tm_sec/2 );
annieluo2 0:d6c9b09b4042 41 }
annieluo2 0:d6c9b09b4042 42
annieluo2 0:d6c9b09b4042 43 FATFileSystem *FATFileSystem::_ffs[_VOLUMES] = {0};
annieluo2 0:d6c9b09b4042 44
annieluo2 0:d6c9b09b4042 45 FATFileSystem::FATFileSystem(const char* n) : FileSystemLike(n) {
annieluo2 0:d6c9b09b4042 46 debug_if(FFS_DBG, "FATFileSystem(%s)\n", n);
annieluo2 0:d6c9b09b4042 47 for(int i=0; i<_VOLUMES; i++) {
annieluo2 0:d6c9b09b4042 48 if(_ffs[i] == 0) {
annieluo2 0:d6c9b09b4042 49 _ffs[i] = this;
annieluo2 0:d6c9b09b4042 50 _fsid[0] = '0' + i;
annieluo2 0:d6c9b09b4042 51 _fsid[1] = '\0';
annieluo2 0:d6c9b09b4042 52 debug_if(FFS_DBG, "Mounting [%s] on ffs drive [%s]\n", getName(), _fsid);
annieluo2 0:d6c9b09b4042 53 f_mount(&_fs, _fsid, 0);
annieluo2 0:d6c9b09b4042 54 return;
annieluo2 0:d6c9b09b4042 55 }
annieluo2 0:d6c9b09b4042 56 }
annieluo2 0:d6c9b09b4042 57 error("Couldn't create %s in FATFileSystem::FATFileSystem\n", n);
annieluo2 0:d6c9b09b4042 58 }
annieluo2 0:d6c9b09b4042 59
annieluo2 0:d6c9b09b4042 60 FATFileSystem::~FATFileSystem() {
annieluo2 0:d6c9b09b4042 61 for (int i=0; i<_VOLUMES; i++) {
annieluo2 0:d6c9b09b4042 62 if (_ffs[i] == this) {
annieluo2 0:d6c9b09b4042 63 _ffs[i] = 0;
annieluo2 0:d6c9b09b4042 64 f_mount(NULL, _fsid, 0);
annieluo2 0:d6c9b09b4042 65 }
annieluo2 0:d6c9b09b4042 66 }
annieluo2 0:d6c9b09b4042 67 }
annieluo2 0:d6c9b09b4042 68
annieluo2 0:d6c9b09b4042 69 FileHandle *FATFileSystem::open(const char* name, int flags) {
annieluo2 0:d6c9b09b4042 70 debug_if(FFS_DBG, "open(%s) on filesystem [%s], drv [%s]\n", name, getName(), _fsid);
annieluo2 0:d6c9b09b4042 71 char n[64];
annieluo2 0:d6c9b09b4042 72 sprintf(n, "%s:/%s", _fsid, name);
annieluo2 0:d6c9b09b4042 73
annieluo2 0:d6c9b09b4042 74 /* POSIX flags -> FatFS open mode */
annieluo2 0:d6c9b09b4042 75 BYTE openmode;
annieluo2 0:d6c9b09b4042 76 if (flags & O_RDWR) {
annieluo2 0:d6c9b09b4042 77 openmode = FA_READ|FA_WRITE;
annieluo2 0:d6c9b09b4042 78 } else if(flags & O_WRONLY) {
annieluo2 0:d6c9b09b4042 79 openmode = FA_WRITE;
annieluo2 0:d6c9b09b4042 80 } else {
annieluo2 0:d6c9b09b4042 81 openmode = FA_READ;
annieluo2 0:d6c9b09b4042 82 }
annieluo2 0:d6c9b09b4042 83 if(flags & O_CREAT) {
annieluo2 0:d6c9b09b4042 84 if(flags & O_TRUNC) {
annieluo2 0:d6c9b09b4042 85 openmode |= FA_CREATE_ALWAYS;
annieluo2 0:d6c9b09b4042 86 } else {
annieluo2 0:d6c9b09b4042 87 openmode |= FA_OPEN_ALWAYS;
annieluo2 0:d6c9b09b4042 88 }
annieluo2 0:d6c9b09b4042 89 }
annieluo2 0:d6c9b09b4042 90
annieluo2 0:d6c9b09b4042 91 FIL fh;
annieluo2 0:d6c9b09b4042 92 FRESULT res = f_open(&fh, n, openmode);
annieluo2 0:d6c9b09b4042 93 if (res) {
annieluo2 0:d6c9b09b4042 94 debug_if(FFS_DBG, "f_open('w') failed: %d\n", res);
annieluo2 0:d6c9b09b4042 95 return NULL;
annieluo2 0:d6c9b09b4042 96 }
annieluo2 0:d6c9b09b4042 97 if (flags & O_APPEND) {
annieluo2 0:d6c9b09b4042 98 f_lseek(&fh, fh.fsize);
annieluo2 0:d6c9b09b4042 99 }
annieluo2 0:d6c9b09b4042 100 return new FATFileHandle(fh);
annieluo2 0:d6c9b09b4042 101 }
annieluo2 0:d6c9b09b4042 102
annieluo2 0:d6c9b09b4042 103 int FATFileSystem::open(FileHandle **file, const char *name, int flags) {
annieluo2 0:d6c9b09b4042 104 FileHandle *temp = open(name, flags);
annieluo2 0:d6c9b09b4042 105 if (!temp) {
annieluo2 0:d6c9b09b4042 106 return -1;
annieluo2 0:d6c9b09b4042 107 }
annieluo2 0:d6c9b09b4042 108
annieluo2 0:d6c9b09b4042 109 *file = temp;
annieluo2 0:d6c9b09b4042 110 return 0;
annieluo2 0:d6c9b09b4042 111 }
annieluo2 0:d6c9b09b4042 112
annieluo2 0:d6c9b09b4042 113 int FATFileSystem::remove(const char *filename) {
annieluo2 0:d6c9b09b4042 114 FRESULT res = f_unlink(filename);
annieluo2 0:d6c9b09b4042 115 if (res) {
annieluo2 0:d6c9b09b4042 116 debug_if(FFS_DBG, "f_unlink() failed: %d\n", res);
annieluo2 0:d6c9b09b4042 117 return -1;
annieluo2 0:d6c9b09b4042 118 }
annieluo2 0:d6c9b09b4042 119 return 0;
annieluo2 0:d6c9b09b4042 120 }
annieluo2 0:d6c9b09b4042 121
annieluo2 0:d6c9b09b4042 122 int FATFileSystem::rename(const char *oldname, const char *newname) {
annieluo2 0:d6c9b09b4042 123 FRESULT res = f_rename(oldname, newname);
annieluo2 0:d6c9b09b4042 124 if (res) {
annieluo2 0:d6c9b09b4042 125 debug_if(FFS_DBG, "f_rename() failed: %d\n", res);
annieluo2 0:d6c9b09b4042 126 return -1;
annieluo2 0:d6c9b09b4042 127 }
annieluo2 0:d6c9b09b4042 128 return 0;
annieluo2 0:d6c9b09b4042 129 }
annieluo2 0:d6c9b09b4042 130
annieluo2 0:d6c9b09b4042 131 int FATFileSystem::format() {
annieluo2 0:d6c9b09b4042 132 FRESULT res = f_mkfs(_fsid, 0, 512); // Logical drive number, Partitioning rule, Allocation unit size (bytes per cluster)
annieluo2 0:d6c9b09b4042 133 if (res) {
annieluo2 0:d6c9b09b4042 134 debug_if(FFS_DBG, "f_mkfs() failed: %d\n", res);
annieluo2 0:d6c9b09b4042 135 return -1;
annieluo2 0:d6c9b09b4042 136 }
annieluo2 0:d6c9b09b4042 137 return 0;
annieluo2 0:d6c9b09b4042 138 }
annieluo2 0:d6c9b09b4042 139
annieluo2 0:d6c9b09b4042 140 DirHandle *FATFileSystem::opendir(const char *name) {
annieluo2 0:d6c9b09b4042 141 FATFS_DIR dir;
annieluo2 0:d6c9b09b4042 142 FRESULT res = f_opendir(&dir, name);
annieluo2 0:d6c9b09b4042 143 if (res != 0) {
annieluo2 0:d6c9b09b4042 144 return NULL;
annieluo2 0:d6c9b09b4042 145 }
annieluo2 0:d6c9b09b4042 146 return new FATDirHandle(dir);
annieluo2 0:d6c9b09b4042 147 }
annieluo2 0:d6c9b09b4042 148
annieluo2 0:d6c9b09b4042 149 int FATFileSystem::open(DirHandle **dir, const char *name) {
annieluo2 0:d6c9b09b4042 150 DirHandle *temp = opendir(name);
annieluo2 0:d6c9b09b4042 151 if (!temp) {
annieluo2 0:d6c9b09b4042 152 return -1;
annieluo2 0:d6c9b09b4042 153 }
annieluo2 0:d6c9b09b4042 154
annieluo2 0:d6c9b09b4042 155 *dir = temp;
annieluo2 0:d6c9b09b4042 156 return 0;
annieluo2 0:d6c9b09b4042 157 }
annieluo2 0:d6c9b09b4042 158
annieluo2 0:d6c9b09b4042 159 int FATFileSystem::mkdir(const char *name, mode_t mode) {
annieluo2 0:d6c9b09b4042 160 FRESULT res = f_mkdir(name);
annieluo2 0:d6c9b09b4042 161 return res == 0 ? 0 : -1;
annieluo2 0:d6c9b09b4042 162 }
annieluo2 0:d6c9b09b4042 163
annieluo2 0:d6c9b09b4042 164 int FATFileSystem::mount() {
annieluo2 0:d6c9b09b4042 165 FRESULT res = f_mount(&_fs, _fsid, 1);
annieluo2 0:d6c9b09b4042 166 return res == 0 ? 0 : -1;
annieluo2 0:d6c9b09b4042 167 }
annieluo2 0:d6c9b09b4042 168
annieluo2 0:d6c9b09b4042 169 int FATFileSystem::unmount() {
annieluo2 0:d6c9b09b4042 170 if (disk_sync())
annieluo2 0:d6c9b09b4042 171 return -1;
annieluo2 0:d6c9b09b4042 172 FRESULT res = f_mount(NULL, _fsid, 0);
annieluo2 0:d6c9b09b4042 173 return res == 0 ? 0 : -1;
annieluo2 0:d6c9b09b4042 174 }