james kain / Mbed 2 deprecated GPS_Incremental

JEK changes enabling proper recording of IMU/GPS datastrams - 02-APR-2013

Dependencies:   mbed

Fork of GPS_Incremental by Dan Matthews

FatFileSystem/FATFileSystem.cpp@9:b45feb91ba38, 2013-04-19 (annotated)

Committer:
jekain314
Date:
Fri Apr 19 16:21:27 2013 +0000
Revision:
9:b45feb91ba38
Parent:
0:c746ee34feae 
update to allow better imu gps data collection

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dannyman939 0:c746ee34feae 1 /* mbed Microcontroller Library - FATFileSystem
dannyman939 0:c746ee34feae 2 * Copyright (c) 2008, sford
dannyman939 0:c746ee34feae 3 */
dannyman939 0:c746ee34feae 4
dannyman939 0:c746ee34feae 5 #include "FATFileSystem.h"
dannyman939 0:c746ee34feae 6
dannyman939 0:c746ee34feae 7 #include "mbed.h"
dannyman939 0:c746ee34feae 8
dannyman939 0:c746ee34feae 9 #include "FileSystemLike.h"
dannyman939 0:c746ee34feae 10 #include "FATFileHandle.h"
dannyman939 0:c746ee34feae 11 #include "FATDirHandle.h"
dannyman939 0:c746ee34feae 12 #include "ff.h"
dannyman939 0:c746ee34feae 13 //#include "Debug.h"
dannyman939 0:c746ee34feae 14 #include <stdio.h>
dannyman939 0:c746ee34feae 15 #include <stdlib.h>
dannyman939 0:c746ee34feae 16
dannyman939 0:c746ee34feae 17 DWORD get_fattime (void) {
dannyman939 0:c746ee34feae 18 return 999;
dannyman939 0:c746ee34feae 19 }
dannyman939 0:c746ee34feae 20
dannyman939 0:c746ee34feae 21 namespace mbed {
dannyman939 0:c746ee34feae 22
dannyman939 0:c746ee34feae 23 #if FFSDEBUG_ENABLED
dannyman939 0:c746ee34feae 24 static const char *FR_ERRORS[] = {
dannyman939 0:c746ee34feae 25 "FR_OK = 0",
dannyman939 0:c746ee34feae 26 "FR_NOT_READY",
dannyman939 0:c746ee34feae 27 "FR_NO_FILE",
dannyman939 0:c746ee34feae 28 "FR_NO_PATH",
dannyman939 0:c746ee34feae 29 "FR_INVALID_NAME",
dannyman939 0:c746ee34feae 30 "FR_INVALID_DRIVE",
dannyman939 0:c746ee34feae 31 "FR_DENIED",
dannyman939 0:c746ee34feae 32 "FR_EXIST",
dannyman939 0:c746ee34feae 33 "FR_RW_ERROR",
dannyman939 0:c746ee34feae 34 "FR_WRITE_PROTECTED",
dannyman939 0:c746ee34feae 35 "FR_NOT_ENABLED",
dannyman939 0:c746ee34feae 36 "FR_NO_FILESYSTEM",
dannyman939 0:c746ee34feae 37 "FR_INVALID_OBJECT",
dannyman939 0:c746ee34feae 38 "FR_MKFS_ABORTED"
dannyman939 0:c746ee34feae 39 };
dannyman939 0:c746ee34feae 40 #endif
dannyman939 0:c746ee34feae 41
dannyman939 0:c746ee34feae 42 FATFileSystem *FATFileSystem::_ffs[_VOLUMES] = {0};
dannyman939 0:c746ee34feae 43
dannyman939 0:c746ee34feae 44 FATFileSystem::FATFileSystem(const char* n) : FileSystemLike(n) {
dannyman939 0:c746ee34feae 45 FFSDEBUG("FATFileSystem(%s)\n", n);
dannyman939 0:c746ee34feae 46 for(int i=0; i<_VOLUMES; i++) {
dannyman939 0:c746ee34feae 47 if(_ffs[i] == 0) {
dannyman939 0:c746ee34feae 48 _ffs[i] = this;
dannyman939 0:c746ee34feae 49 _fsid = i;
dannyman939 0:c746ee34feae 50 FFSDEBUG("Mounting [%s] on ffs drive [%d]\n", _name, _fsid);
dannyman939 0:c746ee34feae 51 f_mount(i, &_fs);
dannyman939 0:c746ee34feae 52 return;
dannyman939 0:c746ee34feae 53 }
dannyman939 0:c746ee34feae 54 }
dannyman939 0:c746ee34feae 55 error("Couldn't create %s in FATFileSystem::FATFileSystem\n",n);
dannyman939 0:c746ee34feae 56 }
dannyman939 0:c746ee34feae 57
dannyman939 0:c746ee34feae 58 FATFileSystem::~FATFileSystem() {
dannyman939 0:c746ee34feae 59 for(int i=0; i<_VOLUMES; i++) {
dannyman939 0:c746ee34feae 60 if(_ffs[i] == this) {
dannyman939 0:c746ee34feae 61 _ffs[i] = 0;
dannyman939 0:c746ee34feae 62 f_mount(i, NULL);
dannyman939 0:c746ee34feae 63 }
dannyman939 0:c746ee34feae 64 }
dannyman939 0:c746ee34feae 65 }
dannyman939 0:c746ee34feae 66
dannyman939 0:c746ee34feae 67 FileHandle *FATFileSystem::open(const char* name, int flags) {
dannyman939 0:c746ee34feae 68 FFSDEBUG("open(%s) on filesystem [%s], drv [%d]\n", name, _name, _fsid);
dannyman939 0:c746ee34feae 69 char n[64];
dannyman939 0:c746ee34feae 70 sprintf(n, "%d:/%s", _fsid, name);
dannyman939 0:c746ee34feae 71
dannyman939 0:c746ee34feae 72 /* POSIX flags -> FatFS open mode */
dannyman939 0:c746ee34feae 73 BYTE openmode;
dannyman939 0:c746ee34feae 74 if(flags & O_RDWR) {
dannyman939 0:c746ee34feae 75 openmode = FA_READ|FA_WRITE;
dannyman939 0:c746ee34feae 76 } else if(flags & O_WRONLY) {
dannyman939 0:c746ee34feae 77 openmode = FA_WRITE;
dannyman939 0:c746ee34feae 78 } else {
dannyman939 0:c746ee34feae 79 openmode = FA_READ;
dannyman939 0:c746ee34feae 80 }
dannyman939 0:c746ee34feae 81 if(flags & O_CREAT) {
dannyman939 0:c746ee34feae 82 if(flags & O_TRUNC) {
dannyman939 0:c746ee34feae 83 openmode |= FA_CREATE_ALWAYS;
dannyman939 0:c746ee34feae 84 } else {
dannyman939 0:c746ee34feae 85 openmode |= FA_OPEN_ALWAYS;
dannyman939 0:c746ee34feae 86 }
dannyman939 0:c746ee34feae 87 }
dannyman939 0:c746ee34feae 88
dannyman939 0:c746ee34feae 89 FIL fh;
dannyman939 0:c746ee34feae 90 FRESULT res = f_open(&fh, n, openmode);
dannyman939 0:c746ee34feae 91 if(res) {
dannyman939 0:c746ee34feae 92 FFSDEBUG("f_open('w') failed (%d, %s)\n", res, FR_ERRORS[res]);
dannyman939 0:c746ee34feae 93 return NULL;
dannyman939 0:c746ee34feae 94 }
dannyman939 0:c746ee34feae 95 if(flags & O_APPEND) {
dannyman939 0:c746ee34feae 96 f_lseek(&fh, fh.fsize);
dannyman939 0:c746ee34feae 97 }
dannyman939 0:c746ee34feae 98 return new FATFileHandle(fh);
dannyman939 0:c746ee34feae 99 }
dannyman939 0:c746ee34feae 100
dannyman939 0:c746ee34feae 101 int FATFileSystem::remove(const char *filename) {
dannyman939 0:c746ee34feae 102 FRESULT res = f_unlink(filename);
dannyman939 0:c746ee34feae 103 if(res) {
dannyman939 0:c746ee34feae 104 FFSDEBUG("f_unlink() failed (%d, %s)\n", res, FR_ERRORS[res]);
dannyman939 0:c746ee34feae 105 return -1;
dannyman939 0:c746ee34feae 106 }
dannyman939 0:c746ee34feae 107 return 0;
dannyman939 0:c746ee34feae 108 }
dannyman939 0:c746ee34feae 109
dannyman939 0:c746ee34feae 110 int FATFileSystem::format() {
dannyman939 0:c746ee34feae 111 FFSDEBUG("format()\n");
dannyman939 0:c746ee34feae 112 FRESULT res = f_mkfs(_fsid, 0, 512); // Logical drive number, Partitioning rule, Allocation unit size (bytes per cluster)
dannyman939 0:c746ee34feae 113 if(res) {
dannyman939 0:c746ee34feae 114 FFSDEBUG("f_mkfs() failed (%d, %s)\n", res, FR_ERRORS[res]);
dannyman939 0:c746ee34feae 115 return -1;
dannyman939 0:c746ee34feae 116 }
dannyman939 0:c746ee34feae 117 return 0;
dannyman939 0:c746ee34feae 118 }
dannyman939 0:c746ee34feae 119
dannyman939 0:c746ee34feae 120 DirHandle *FATFileSystem::opendir(const char *name) {
dannyman939 0:c746ee34feae 121 FATFS_DIR dir;
dannyman939 0:c746ee34feae 122 FRESULT res = f_opendir(&dir, name);
dannyman939 0:c746ee34feae 123 if(res != 0) {
dannyman939 0:c746ee34feae 124 return NULL;
dannyman939 0:c746ee34feae 125 }
dannyman939 0:c746ee34feae 126 return new FATDirHandle(dir);
dannyman939 0:c746ee34feae 127 }
dannyman939 0:c746ee34feae 128
dannyman939 0:c746ee34feae 129 int FATFileSystem::mkdir(const char *name, mode_t mode) {
dannyman939 0:c746ee34feae 130 FRESULT res = f_mkdir(name);
dannyman939 0:c746ee34feae 131 return res == 0 ? 0 : -1;
dannyman939 0:c746ee34feae 132 }
dannyman939 0:c746ee34feae 133
dannyman939 0:c746ee34feae 134 } // namespace mbed