this library has few changes from the original library, for effects of this work.
FATFileSystem/FATFileSystem.cpp
- Committer:
- FannyCalle
- Date:
- 2018-05-21
- Revision:
- 0:8214896432e0
File content as of revision 0:8214896432e0:
/* mbed Microcontroller Library * Copyright (c) 2006-2012 ARM Limited * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #include "mbed.h" #include "ffconf.h" #include "mbed_debug.h" #include "FATFileSystem.h" #include "FATFileHandle.h" #include "FATDirHandle.h" DWORD get_fattime(void) { time_t rawtime; time(&rawtime); struct tm *ptm = localtime(&rawtime); return (DWORD)(ptm->tm_year - 80) << 25 | (DWORD)(ptm->tm_mon + 1 ) << 21 | (DWORD)(ptm->tm_mday ) << 16 | (DWORD)(ptm->tm_hour ) << 11 | (DWORD)(ptm->tm_min ) << 5 | (DWORD)(ptm->tm_sec/2 ); } FATFileSystem *FATFileSystem::_ffs[_VOLUMES] = {0}; FATFileSystem::FATFileSystem(const char* n) : FileSystemLike(n) { debug_if(FFS_DBG, "FATFileSystem(%s)\n", n); for(int i=0; i<_VOLUMES; i++) { if(_ffs[i] == 0) { _ffs[i] = this; _fsid[0] = '0' + i; _fsid[1] = '\0'; debug_if(FFS_DBG, "Mounting [%s] on ffs drive [%s]\n", getName(), _fsid); f_mount(&_fs, _fsid, 0); return; } } error("Couldn't create %s in FATFileSystem::FATFileSystem\n", n); } FATFileSystem::~FATFileSystem() { for (int i=0; i<_VOLUMES; i++) { if (_ffs[i] == this) { _ffs[i] = 0; f_mount(NULL, _fsid, 0); } } } FileHandle *FATFileSystem::open(const char* name, int flags) { debug_if(FFS_DBG, "open(%s) on filesystem [%s], drv [%s]\n", name, getName(), _fsid); char n[64]; sprintf(n, "%s:/%s", _fsid, name); /* POSIX flags -> FatFS open mode */ BYTE openmode; if (flags & O_RDWR) { openmode = FA_READ|FA_WRITE; } else if(flags & O_WRONLY) { openmode = FA_WRITE; } else { openmode = FA_READ; } if(flags & O_CREAT) { if(flags & O_TRUNC) { openmode |= FA_CREATE_ALWAYS; } else { openmode |= FA_OPEN_ALWAYS; } } FIL fh; FRESULT res = f_open(&fh, n, openmode); if (res) { debug_if(FFS_DBG, "f_open('w') failed: %d\n", res); return NULL; } if (flags & O_APPEND) { f_lseek(&fh, fh.fsize); } return new FATFileHandle(fh); } int FATFileSystem::remove(const char *filename) { FRESULT res = f_unlink(filename); if (res) { debug_if(FFS_DBG, "f_unlink() failed: %d\n", res); return -1; } return 0; } int FATFileSystem::rename(const char *oldname, const char *newname) { FRESULT res = f_rename(oldname, newname); if (res) { debug_if(FFS_DBG, "f_rename() failed: %d\n", res); return -1; } return 0; } int FATFileSystem::format() { FRESULT res = f_mkfs(_fsid, 0, 512); // Logical drive number, Partitioning rule, Allocation unit size (bytes per cluster) if (res) { debug_if(FFS_DBG, "f_mkfs() failed: %d\n", res); return -1; } return 0; } DirHandle *FATFileSystem::opendir(const char *name) { FATFS_DIR dir; FRESULT res = f_opendir(&dir, name); if (res != 0) { return NULL; } return new FATDirHandle(dir); } int FATFileSystem::mkdir(const char *name, mode_t mode) { FRESULT res = f_mkdir(name); return res == 0 ? 0 : -1; } int FATFileSystem::mount() { FRESULT res = f_mount(&_fs, _fsid, 1); return res == 0 ? 0 : -1; } int FATFileSystem::unmount() { if (disk_sync()) return -1; FRESULT res = f_mount(NULL, _fsid, 0); return res == 0 ? 0 : -1; }