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Web server based weather station using Sparkfun Weather Meters.
Dependencies: FatFileSystem mbed WeatherMeters SDFileSystem
Diff: FatFileSystem/FATFileSystem.cpp
- Revision:
- 0:616601bde9fb
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/FatFileSystem/FATFileSystem.cpp Thu Feb 23 21:38:39 2012 +0000 @@ -0,0 +1,134 @@ +/* mbed Microcontroller Library - FATFileSystem + * Copyright (c) 2008, sford + */ + +#include "FATFileSystem.h" + +#include "mbed.h" + +#include "FileSystemLike.h" +#include "FATFileHandle.h" +#include "FATDirHandle.h" +#include "ff.h" +//#include "Debug.h" +#include <stdio.h> +#include <stdlib.h> + +DWORD get_fattime (void) { + return 999; +} + +namespace mbed { + +#if FFSDEBUG_ENABLED +static const char *FR_ERRORS[] = { + "FR_OK = 0", + "FR_NOT_READY", + "FR_NO_FILE", + "FR_NO_PATH", + "FR_INVALID_NAME", + "FR_INVALID_DRIVE", + "FR_DENIED", + "FR_EXIST", + "FR_RW_ERROR", + "FR_WRITE_PROTECTED", + "FR_NOT_ENABLED", + "FR_NO_FILESYSTEM", + "FR_INVALID_OBJECT", + "FR_MKFS_ABORTED" +}; +#endif + +FATFileSystem *FATFileSystem::_ffs[_VOLUMES] = {0}; + +FATFileSystem::FATFileSystem(const char* n) : FileSystemLike(n) { + FFSDEBUG("FATFileSystem(%s)\n", n); + for(int i=0; i<_VOLUMES; i++) { + if(_ffs[i] == 0) { + _ffs[i] = this; + _fsid = i; + FFSDEBUG("Mounting [%s] on ffs drive [%d]\n", _name, _fsid); + f_mount(i, &_fs); + 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(i, NULL); + } + } +} + +FileHandle *FATFileSystem::open(const char* name, int flags) { + FFSDEBUG("open(%s) on filesystem [%s], drv [%d]\n", name, _name, _fsid); + char n[64]; + sprintf(n, "%d:/%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) { + FFSDEBUG("f_open('w') failed (%d, %s)\n", res, FR_ERRORS[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) { + FFSDEBUG("f_unlink() failed (%d, %s)\n", res, FR_ERRORS[res]); + return -1; + } + return 0; +} + +int FATFileSystem::format() { + FFSDEBUG("format()\n"); + FRESULT res = f_mkfs(_fsid, 0, 512); // Logical drive number, Partitioning rule, Allocation unit size (bytes per cluster) + if(res) { + FFSDEBUG("f_mkfs() failed (%d, %s)\n", res, FR_ERRORS[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; +} + +} // namespace mbed