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/FATFileHandle.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 - FATFileHandle
dannyman939 0:c746ee34feae 2 * Copyright (c) 2008, sford
dannyman939 0:c746ee34feae 3 */
dannyman939 0:c746ee34feae 4
dannyman939 0:c746ee34feae 5 #include "FATFileHandle.h"
dannyman939 0:c746ee34feae 6
dannyman939 0:c746ee34feae 7 #include <stdio.h>
dannyman939 0:c746ee34feae 8 #include <stdlib.h>
dannyman939 0:c746ee34feae 9 #include "ff.h"
dannyman939 0:c746ee34feae 10 #include "FATFileSystem.h"
dannyman939 0:c746ee34feae 11
dannyman939 0:c746ee34feae 12 namespace mbed {
dannyman939 0:c746ee34feae 13
dannyman939 0:c746ee34feae 14 #if FFSDEBUG_ENABLED
dannyman939 0:c746ee34feae 15 static const char *FR_ERRORS[] = {
dannyman939 0:c746ee34feae 16 "FR_OK = 0",
dannyman939 0:c746ee34feae 17 "FR_NOT_READY",
dannyman939 0:c746ee34feae 18 "FR_NO_FILE",
dannyman939 0:c746ee34feae 19 "FR_NO_PATH",
dannyman939 0:c746ee34feae 20 "FR_INVALID_NAME",
dannyman939 0:c746ee34feae 21 "FR_INVALID_DRIVE",
dannyman939 0:c746ee34feae 22 "FR_DENIED",
dannyman939 0:c746ee34feae 23 "FR_EXIST",
dannyman939 0:c746ee34feae 24 "FR_RW_ERROR",
dannyman939 0:c746ee34feae 25 "FR_WRITE_PROTECTED",
dannyman939 0:c746ee34feae 26 "FR_NOT_ENABLED",
dannyman939 0:c746ee34feae 27 "FR_NO_FILESYSTEM",
dannyman939 0:c746ee34feae 28 "FR_INVALID_OBJECT",
dannyman939 0:c746ee34feae 29 "FR_MKFS_ABORTED"
dannyman939 0:c746ee34feae 30 };
dannyman939 0:c746ee34feae 31 #endif
dannyman939 0:c746ee34feae 32
dannyman939 0:c746ee34feae 33 FATFileHandle::FATFileHandle(FIL fh) {
dannyman939 0:c746ee34feae 34 _fh = fh;
dannyman939 0:c746ee34feae 35 }
dannyman939 0:c746ee34feae 36
dannyman939 0:c746ee34feae 37 int FATFileHandle::close() {
dannyman939 0:c746ee34feae 38 FFSDEBUG("close\n");
dannyman939 0:c746ee34feae 39 int retval = f_close(&_fh);
dannyman939 0:c746ee34feae 40 delete this;
dannyman939 0:c746ee34feae 41 return retval;
dannyman939 0:c746ee34feae 42 }
dannyman939 0:c746ee34feae 43
dannyman939 0:c746ee34feae 44 ssize_t FATFileHandle::write(const void* buffer, size_t length) {
dannyman939 0:c746ee34feae 45 FFSDEBUG("write(%d)\n", length);
dannyman939 0:c746ee34feae 46 UINT n;
dannyman939 0:c746ee34feae 47 FRESULT res = f_write(&_fh, buffer, length, &n);
dannyman939 0:c746ee34feae 48 if(res) {
dannyman939 0:c746ee34feae 49 FFSDEBUG("f_write() failed (%d, %s)", res, FR_ERRORS[res]);
dannyman939 0:c746ee34feae 50 return -1;
dannyman939 0:c746ee34feae 51 }
dannyman939 0:c746ee34feae 52 return n;
dannyman939 0:c746ee34feae 53 }
dannyman939 0:c746ee34feae 54
dannyman939 0:c746ee34feae 55 ssize_t FATFileHandle::read(void* buffer, size_t length) {
dannyman939 0:c746ee34feae 56 FFSDEBUG("read(%d)\n", length);
dannyman939 0:c746ee34feae 57 UINT n;
dannyman939 0:c746ee34feae 58 FRESULT res = f_read(&_fh, buffer, length, &n);
dannyman939 0:c746ee34feae 59 if(res) {
dannyman939 0:c746ee34feae 60 FFSDEBUG("f_read() failed (%d, %s)\n", res, FR_ERRORS[res]);
dannyman939 0:c746ee34feae 61 return -1;
dannyman939 0:c746ee34feae 62 }
dannyman939 0:c746ee34feae 63 return n;
dannyman939 0:c746ee34feae 64 }
dannyman939 0:c746ee34feae 65
dannyman939 0:c746ee34feae 66 int FATFileHandle::isatty() {
dannyman939 0:c746ee34feae 67 return 0;
dannyman939 0:c746ee34feae 68 }
dannyman939 0:c746ee34feae 69
dannyman939 0:c746ee34feae 70 off_t FATFileHandle::lseek(off_t position, int whence) {
dannyman939 0:c746ee34feae 71 FFSDEBUG("lseek(%i,%i)\n",position,whence);
dannyman939 0:c746ee34feae 72 if(whence == SEEK_END) {
dannyman939 0:c746ee34feae 73 position += _fh.fsize;
dannyman939 0:c746ee34feae 74 } else if(whence==SEEK_CUR) {
dannyman939 0:c746ee34feae 75 position += _fh.fptr;
dannyman939 0:c746ee34feae 76 }
dannyman939 0:c746ee34feae 77 FRESULT res = f_lseek(&_fh, position);
dannyman939 0:c746ee34feae 78 if(res) {
dannyman939 0:c746ee34feae 79 FFSDEBUG("lseek failed (%d, %s)\n", res, FR_ERRORS[res]);
dannyman939 0:c746ee34feae 80 return -1;
dannyman939 0:c746ee34feae 81 } else {
dannyman939 0:c746ee34feae 82 FFSDEBUG("lseek OK, returning %i\n", _fh.fptr);
dannyman939 0:c746ee34feae 83 return _fh.fptr;
dannyman939 0:c746ee34feae 84 }
dannyman939 0:c746ee34feae 85 }
dannyman939 0:c746ee34feae 86
dannyman939 0:c746ee34feae 87 int FATFileHandle::fsync() {
dannyman939 0:c746ee34feae 88 FFSDEBUG("fsync()\n");
dannyman939 0:c746ee34feae 89 FRESULT res = f_sync(&_fh);
dannyman939 0:c746ee34feae 90 if (res) {
dannyman939 0:c746ee34feae 91 FFSDEBUG("f_sync() failed (%d, %s)\n", res, FR_ERRORS[res]);
dannyman939 0:c746ee34feae 92 return -1;
dannyman939 0:c746ee34feae 93 }
dannyman939 0:c746ee34feae 94 return 0;
dannyman939 0:c746ee34feae 95 }
dannyman939 0:c746ee34feae 96
dannyman939 0:c746ee34feae 97 off_t FATFileHandle::flen() {
dannyman939 0:c746ee34feae 98 FFSDEBUG("flen\n");
dannyman939 0:c746ee34feae 99 return _fh.fsize;
dannyman939 0:c746ee34feae 100 }
dannyman939 0:c746ee34feae 101
dannyman939 0:c746ee34feae 102 } // namespace mbed