Kevin Abraham / Mbed 2 deprecated MazeRunner_Fall2017

ECE 2036 Project

Dependencies:   mbed wave_player 4DGL-uLCD-SE

SDFileSystem/FATFileSystem/FATFileSystem.cpp@2:2042f29de6b7, 2019-11-21 (annotated)

Committer:
abraha2d
Date:
Thu Nov 21 16:10:57 2019 +0000
Revision:
2:2042f29de6b7
Parent:
0:cf4396614a79 
Because other peeps is wanting dis...

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rconnorlawson 0:cf4396614a79 1 /* mbed Microcontroller Library
rconnorlawson 0:cf4396614a79 2 * Copyright (c) 2006-2012 ARM Limited
rconnorlawson 0:cf4396614a79 3 *
rconnorlawson 0:cf4396614a79 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
rconnorlawson 0:cf4396614a79 5 * of this software and associated documentation files (the "Software"), to deal
rconnorlawson 0:cf4396614a79 6 * in the Software without restriction, including without limitation the rights
rconnorlawson 0:cf4396614a79 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
rconnorlawson 0:cf4396614a79 8 * copies of the Software, and to permit persons to whom the Software is
rconnorlawson 0:cf4396614a79 9 * furnished to do so, subject to the following conditions:
rconnorlawson 0:cf4396614a79 10 *
rconnorlawson 0:cf4396614a79 11 * The above copyright notice and this permission notice shall be included in
rconnorlawson 0:cf4396614a79 12 * all copies or substantial portions of the Software.
rconnorlawson 0:cf4396614a79 13 *
rconnorlawson 0:cf4396614a79 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
rconnorlawson 0:cf4396614a79 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
rconnorlawson 0:cf4396614a79 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
rconnorlawson 0:cf4396614a79 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
rconnorlawson 0:cf4396614a79 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
rconnorlawson 0:cf4396614a79 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
rconnorlawson 0:cf4396614a79 20 * SOFTWARE.
rconnorlawson 0:cf4396614a79 21 */
rconnorlawson 0:cf4396614a79 22 #include "mbed.h"
rconnorlawson 0:cf4396614a79 23
rconnorlawson 0:cf4396614a79 24 #include "ffconf.h"
rconnorlawson 0:cf4396614a79 25 #include "mbed_debug.h"
rconnorlawson 0:cf4396614a79 26
rconnorlawson 0:cf4396614a79 27 #include "FATFileSystem.h"
rconnorlawson 0:cf4396614a79 28 #include "FATFileHandle.h"
rconnorlawson 0:cf4396614a79 29 #include "FATDirHandle.h"
rconnorlawson 0:cf4396614a79 30
rconnorlawson 0:cf4396614a79 31 DWORD get_fattime(void) {
rconnorlawson 0:cf4396614a79 32 time_t rawtime;
rconnorlawson 0:cf4396614a79 33 time(&rawtime);
rconnorlawson 0:cf4396614a79 34 struct tm *ptm = localtime(&rawtime);
rconnorlawson 0:cf4396614a79 35 return (DWORD)(ptm->tm_year - 80) << 25
rconnorlawson 0:cf4396614a79 36 | (DWORD)(ptm->tm_mon + 1 ) << 21
rconnorlawson 0:cf4396614a79 37 | (DWORD)(ptm->tm_mday ) << 16
rconnorlawson 0:cf4396614a79 38 | (DWORD)(ptm->tm_hour ) << 11
rconnorlawson 0:cf4396614a79 39 | (DWORD)(ptm->tm_min ) << 5
rconnorlawson 0:cf4396614a79 40 | (DWORD)(ptm->tm_sec/2 );
rconnorlawson 0:cf4396614a79 41 }
rconnorlawson 0:cf4396614a79 42
rconnorlawson 0:cf4396614a79 43 FATFileSystem *FATFileSystem::_ffs[_VOLUMES] = {0};
rconnorlawson 0:cf4396614a79 44
rconnorlawson 0:cf4396614a79 45 FATFileSystem::FATFileSystem(const char* n) : FileSystemLike(n) {
rconnorlawson 0:cf4396614a79 46 debug_if(FFS_DBG, "FATFileSystem(%s)\n", n);
rconnorlawson 0:cf4396614a79 47 for(int i=0; i<_VOLUMES; i++) {
rconnorlawson 0:cf4396614a79 48 if(_ffs[i] == 0) {
rconnorlawson 0:cf4396614a79 49 _ffs[i] = this;
rconnorlawson 0:cf4396614a79 50 _fsid = i;
rconnorlawson 0:cf4396614a79 51 debug_if(FFS_DBG, "Mounting [%s] on ffs drive [%d]\n", _name, _fsid);
rconnorlawson 0:cf4396614a79 52 f_mount(i, &_fs);
rconnorlawson 0:cf4396614a79 53 return;
rconnorlawson 0:cf4396614a79 54 }
rconnorlawson 0:cf4396614a79 55 }
rconnorlawson 0:cf4396614a79 56 error("Couldn't create %s in FATFileSystem::FATFileSystem\n", n);
rconnorlawson 0:cf4396614a79 57 }
rconnorlawson 0:cf4396614a79 58
rconnorlawson 0:cf4396614a79 59 FATFileSystem::~FATFileSystem() {
rconnorlawson 0:cf4396614a79 60 for (int i=0; i<_VOLUMES; i++) {
rconnorlawson 0:cf4396614a79 61 if (_ffs[i] == this) {
rconnorlawson 0:cf4396614a79 62 _ffs[i] = 0;
rconnorlawson 0:cf4396614a79 63 f_mount(i, NULL);
rconnorlawson 0:cf4396614a79 64 }
rconnorlawson 0:cf4396614a79 65 }
rconnorlawson 0:cf4396614a79 66 }
rconnorlawson 0:cf4396614a79 67
rconnorlawson 0:cf4396614a79 68 FileHandle *FATFileSystem::open(const char* name, int flags) {
rconnorlawson 0:cf4396614a79 69 debug_if(FFS_DBG, "open(%s) on filesystem [%s], drv [%d]\n", name, _name, _fsid);
rconnorlawson 0:cf4396614a79 70 char n[64];
rconnorlawson 0:cf4396614a79 71 sprintf(n, "%d:/%s", _fsid, name);
rconnorlawson 0:cf4396614a79 72
rconnorlawson 0:cf4396614a79 73 /* POSIX flags -> FatFS open mode */
rconnorlawson 0:cf4396614a79 74 BYTE openmode;
rconnorlawson 0:cf4396614a79 75 if (flags & O_RDWR) {
rconnorlawson 0:cf4396614a79 76 openmode = FA_READ|FA_WRITE;
rconnorlawson 0:cf4396614a79 77 } else if(flags & O_WRONLY) {
rconnorlawson 0:cf4396614a79 78 openmode = FA_WRITE;
rconnorlawson 0:cf4396614a79 79 } else {
rconnorlawson 0:cf4396614a79 80 openmode = FA_READ;
rconnorlawson 0:cf4396614a79 81 }
rconnorlawson 0:cf4396614a79 82 if(flags & O_CREAT) {
rconnorlawson 0:cf4396614a79 83 if(flags & O_TRUNC) {
rconnorlawson 0:cf4396614a79 84 openmode |= FA_CREATE_ALWAYS;
rconnorlawson 0:cf4396614a79 85 } else {
rconnorlawson 0:cf4396614a79 86 openmode |= FA_OPEN_ALWAYS;
rconnorlawson 0:cf4396614a79 87 }
rconnorlawson 0:cf4396614a79 88 }
rconnorlawson 0:cf4396614a79 89
rconnorlawson 0:cf4396614a79 90 FIL fh;
rconnorlawson 0:cf4396614a79 91 FRESULT res = f_open(&fh, n, openmode);
rconnorlawson 0:cf4396614a79 92 if (res) {
rconnorlawson 0:cf4396614a79 93 debug_if(FFS_DBG, "f_open('w') failed: %d\n", res);
rconnorlawson 0:cf4396614a79 94 return NULL;
rconnorlawson 0:cf4396614a79 95 }
rconnorlawson 0:cf4396614a79 96 if (flags & O_APPEND) {
rconnorlawson 0:cf4396614a79 97 f_lseek(&fh, fh.fsize);
rconnorlawson 0:cf4396614a79 98 }
rconnorlawson 0:cf4396614a79 99 return new FATFileHandle(fh);
rconnorlawson 0:cf4396614a79 100 }
rconnorlawson 0:cf4396614a79 101
rconnorlawson 0:cf4396614a79 102 int FATFileSystem::remove(const char *filename) {
rconnorlawson 0:cf4396614a79 103 FRESULT res = f_unlink(filename);
rconnorlawson 0:cf4396614a79 104 if (res) {
rconnorlawson 0:cf4396614a79 105 debug_if(FFS_DBG, "f_unlink() failed: %d\n", res);
rconnorlawson 0:cf4396614a79 106 return -1;
rconnorlawson 0:cf4396614a79 107 }
rconnorlawson 0:cf4396614a79 108 return 0;
rconnorlawson 0:cf4396614a79 109 }
rconnorlawson 0:cf4396614a79 110
rconnorlawson 0:cf4396614a79 111 int FATFileSystem::format() {
rconnorlawson 0:cf4396614a79 112 FRESULT res = f_mkfs(_fsid, 0, 512); // Logical drive number, Partitioning rule, Allocation unit size (bytes per cluster)
rconnorlawson 0:cf4396614a79 113 if (res) {
rconnorlawson 0:cf4396614a79 114 debug_if(FFS_DBG, "f_mkfs() failed: %d\n", res);
rconnorlawson 0:cf4396614a79 115 return -1;
rconnorlawson 0:cf4396614a79 116 }
rconnorlawson 0:cf4396614a79 117 return 0;
rconnorlawson 0:cf4396614a79 118 }
rconnorlawson 0:cf4396614a79 119
rconnorlawson 0:cf4396614a79 120 DirHandle *FATFileSystem::opendir(const char *name) {
rconnorlawson 0:cf4396614a79 121 FATFS_DIR dir;
rconnorlawson 0:cf4396614a79 122 FRESULT res = f_opendir(&dir, name);
rconnorlawson 0:cf4396614a79 123 if (res != 0) {
rconnorlawson 0:cf4396614a79 124 return NULL;
rconnorlawson 0:cf4396614a79 125 }
rconnorlawson 0:cf4396614a79 126 return new FATDirHandle(dir);
rconnorlawson 0:cf4396614a79 127 }
rconnorlawson 0:cf4396614a79 128
rconnorlawson 0:cf4396614a79 129 int FATFileSystem::mkdir(const char *name, mode_t mode) {
rconnorlawson 0:cf4396614a79 130 FRESULT res = f_mkdir(name);
rconnorlawson 0:cf4396614a79 131 return res == 0 ? 0 : -1;
rconnorlawson 0:cf4396614a79 132 }