Kazuki Yamamoto / USBLocalFileSystem

fork from va009039/USBLocalFileSystem

Dependencies:   USBDevice

Dependents:   11u35_usbLocalFilesystem

Fork of USBLocalFileSystem by Norimasa Okamoto

fat/FATFileSystem.cpp@11:c396747794c6, 2016-03-04 (annotated)

Committer:
k4zuki
Date:
Fri Mar 04 10:27:29 2016 +0000
Revision:
11:c396747794c6
Parent:
0:39eb4d5b97df 
remove SWSPI

Who changed what in which revision?

UserRevisionLine numberNew contents of line
va009039 0:39eb4d5b97df 1 /* mbed Microcontroller Library
va009039 0:39eb4d5b97df 2 * Copyright (c) 2006-2012 ARM Limited
va009039 0:39eb4d5b97df 3 *
va009039 0:39eb4d5b97df 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
va009039 0:39eb4d5b97df 5 * of this software and associated documentation files (the "Software"), to deal
va009039 0:39eb4d5b97df 6 * in the Software without restriction, including without limitation the rights
va009039 0:39eb4d5b97df 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
va009039 0:39eb4d5b97df 8 * copies of the Software, and to permit persons to whom the Software is
va009039 0:39eb4d5b97df 9 * furnished to do so, subject to the following conditions:
va009039 0:39eb4d5b97df 10 *
va009039 0:39eb4d5b97df 11 * The above copyright notice and this permission notice shall be included in
va009039 0:39eb4d5b97df 12 * all copies or substantial portions of the Software.
va009039 0:39eb4d5b97df 13 *
va009039 0:39eb4d5b97df 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
va009039 0:39eb4d5b97df 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
va009039 0:39eb4d5b97df 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
va009039 0:39eb4d5b97df 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
va009039 0:39eb4d5b97df 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
va009039 0:39eb4d5b97df 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
va009039 0:39eb4d5b97df 20 * SOFTWARE.
va009039 0:39eb4d5b97df 21 */
va009039 0:39eb4d5b97df 22 #include "mbed.h"
va009039 0:39eb4d5b97df 23
va009039 0:39eb4d5b97df 24 #include "ffconf.h"
va009039 0:39eb4d5b97df 25 #include "mbed_debug.h"
va009039 0:39eb4d5b97df 26
va009039 0:39eb4d5b97df 27 #include "FATFileSystem.h"
va009039 0:39eb4d5b97df 28 #include "FATFileHandle.h"
va009039 0:39eb4d5b97df 29 #include "FATDirHandle.h"
va009039 0:39eb4d5b97df 30
va009039 0:39eb4d5b97df 31 DWORD get_fattime(void) {
va009039 0:39eb4d5b97df 32 time_t rawtime;
va009039 0:39eb4d5b97df 33 time(&rawtime);
va009039 0:39eb4d5b97df 34 struct tm *ptm = localtime(&rawtime);
va009039 0:39eb4d5b97df 35 return (DWORD)(ptm->tm_year - 80) << 25
va009039 0:39eb4d5b97df 36 | (DWORD)(ptm->tm_mon + 1 ) << 21
va009039 0:39eb4d5b97df 37 | (DWORD)(ptm->tm_mday ) << 16
va009039 0:39eb4d5b97df 38 | (DWORD)(ptm->tm_hour ) << 11
va009039 0:39eb4d5b97df 39 | (DWORD)(ptm->tm_min ) << 5
va009039 0:39eb4d5b97df 40 | (DWORD)(ptm->tm_sec/2 );
va009039 0:39eb4d5b97df 41 }
va009039 0:39eb4d5b97df 42
va009039 0:39eb4d5b97df 43 FATFileSystem *FATFileSystem::_ffs[_VOLUMES] = {0};
va009039 0:39eb4d5b97df 44
va009039 0:39eb4d5b97df 45 FATFileSystem::FATFileSystem(const char* n) : FileSystemLike(n) {
va009039 0:39eb4d5b97df 46 debug_if(FFS_DBG, "FATFileSystem(%s)\n", n);
va009039 0:39eb4d5b97df 47 for(int i=0; i<_VOLUMES; i++) {
va009039 0:39eb4d5b97df 48 if(_ffs[i] == 0) {
va009039 0:39eb4d5b97df 49 _ffs[i] = this;
va009039 0:39eb4d5b97df 50 _fsid = i;
va009039 0:39eb4d5b97df 51 debug_if(FFS_DBG, "Mounting [%s] on ffs drive [%d]\n", _name, _fsid);
va009039 0:39eb4d5b97df 52 f_mount(i, &_fs);
va009039 0:39eb4d5b97df 53 return;
va009039 0:39eb4d5b97df 54 }
va009039 0:39eb4d5b97df 55 }
va009039 0:39eb4d5b97df 56 error("Couldn't create %s in FATFileSystem::FATFileSystem\n", n);
va009039 0:39eb4d5b97df 57 }
va009039 0:39eb4d5b97df 58
va009039 0:39eb4d5b97df 59 FATFileSystem::~FATFileSystem() {
va009039 0:39eb4d5b97df 60 for (int i=0; i<_VOLUMES; i++) {
va009039 0:39eb4d5b97df 61 if (_ffs[i] == this) {
va009039 0:39eb4d5b97df 62 _ffs[i] = 0;
va009039 0:39eb4d5b97df 63 f_mount(i, NULL);
va009039 0:39eb4d5b97df 64 }
va009039 0:39eb4d5b97df 65 }
va009039 0:39eb4d5b97df 66 }
va009039 0:39eb4d5b97df 67
va009039 0:39eb4d5b97df 68 FileHandle *FATFileSystem::open(const char* name, int flags) {
va009039 0:39eb4d5b97df 69 debug_if(FFS_DBG, "open(%s) on filesystem [%s], drv [%d]\n", name, _name, _fsid);
va009039 0:39eb4d5b97df 70 char n[64];
va009039 0:39eb4d5b97df 71 sprintf(n, "%d:/%s", _fsid, name);
va009039 0:39eb4d5b97df 72
va009039 0:39eb4d5b97df 73 /* POSIX flags -> FatFS open mode */
va009039 0:39eb4d5b97df 74 BYTE openmode;
va009039 0:39eb4d5b97df 75 if (flags & O_RDWR) {
va009039 0:39eb4d5b97df 76 openmode = FA_READ|FA_WRITE;
va009039 0:39eb4d5b97df 77 } else if(flags & O_WRONLY) {
va009039 0:39eb4d5b97df 78 openmode = FA_WRITE;
va009039 0:39eb4d5b97df 79 } else {
va009039 0:39eb4d5b97df 80 openmode = FA_READ;
va009039 0:39eb4d5b97df 81 }
va009039 0:39eb4d5b97df 82 if(flags & O_CREAT) {
va009039 0:39eb4d5b97df 83 if(flags & O_TRUNC) {
va009039 0:39eb4d5b97df 84 openmode |= FA_CREATE_ALWAYS;
va009039 0:39eb4d5b97df 85 } else {
va009039 0:39eb4d5b97df 86 openmode |= FA_OPEN_ALWAYS;
va009039 0:39eb4d5b97df 87 }
va009039 0:39eb4d5b97df 88 }
va009039 0:39eb4d5b97df 89
va009039 0:39eb4d5b97df 90 FIL fh;
va009039 0:39eb4d5b97df 91 FRESULT res = f_open(&fh, n, openmode);
va009039 0:39eb4d5b97df 92 if (res) {
va009039 0:39eb4d5b97df 93 debug_if(FFS_DBG, "f_open('w') failed: %d\n", res);
va009039 0:39eb4d5b97df 94 return NULL;
va009039 0:39eb4d5b97df 95 }
va009039 0:39eb4d5b97df 96 if (flags & O_APPEND) {
va009039 0:39eb4d5b97df 97 f_lseek(&fh, fh.fsize);
va009039 0:39eb4d5b97df 98 }
va009039 0:39eb4d5b97df 99 return new FATFileHandle(fh);
va009039 0:39eb4d5b97df 100 }
va009039 0:39eb4d5b97df 101
va009039 0:39eb4d5b97df 102 int FATFileSystem::remove(const char *filename) {
va009039 0:39eb4d5b97df 103 FRESULT res = f_unlink(filename);
va009039 0:39eb4d5b97df 104 if (res) {
va009039 0:39eb4d5b97df 105 debug_if(FFS_DBG, "f_unlink() failed: %d\n", res);
va009039 0:39eb4d5b97df 106 return -1;
va009039 0:39eb4d5b97df 107 }
va009039 0:39eb4d5b97df 108 return 0;
va009039 0:39eb4d5b97df 109 }
va009039 0:39eb4d5b97df 110
va009039 0:39eb4d5b97df 111 int FATFileSystem::format() {
va009039 0:39eb4d5b97df 112 FRESULT res = f_mkfs(_fsid, 0, 512); // Logical drive number, Partitioning rule, Allocation unit size (bytes per cluster)
va009039 0:39eb4d5b97df 113 if (res) {
va009039 0:39eb4d5b97df 114 debug_if(FFS_DBG, "f_mkfs() failed: %d\n", res);
va009039 0:39eb4d5b97df 115 return -1;
va009039 0:39eb4d5b97df 116 }
va009039 0:39eb4d5b97df 117 return 0;
va009039 0:39eb4d5b97df 118 }
va009039 0:39eb4d5b97df 119
va009039 0:39eb4d5b97df 120 DirHandle *FATFileSystem::opendir(const char *name) {
va009039 0:39eb4d5b97df 121 FATFS_DIR dir;
va009039 0:39eb4d5b97df 122 FRESULT res = f_opendir(&dir, name);
va009039 0:39eb4d5b97df 123 if (res != 0) {
va009039 0:39eb4d5b97df 124 return NULL;
va009039 0:39eb4d5b97df 125 }
va009039 0:39eb4d5b97df 126 return new FATDirHandle(dir);
va009039 0:39eb4d5b97df 127 }
va009039 0:39eb4d5b97df 128
va009039 0:39eb4d5b97df 129 int FATFileSystem::mkdir(const char *name, mode_t mode) {
va009039 0:39eb4d5b97df 130 FRESULT res = f_mkdir(name);
va009039 0:39eb4d5b97df 131 return res == 0 ? 0 : -1;
va009039 0:39eb4d5b97df 132 }