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