David Smart / FATFileSystem

Revised to support ability to have both SD and USB drives mounted.

Dependents:   Multi-FileSystem Multi-FileSystem

Fork of FATFileSystem by mbed official

FATFileHandle.cpp@12:d816f503fc6f, 2017-07-29 (annotated)

Committer:
WiredHome
Date:
Sat Jul 29 12:39:03 2017 +0000
Revision:
12:d816f503fc6f
Parent:
8:f08059355141 
Reduce the number of sectors definition

Who changed what in which revision?

UserRevisionLine numberNew contents of line
emilmont 1:46ce1e16c870 1 /* mbed Microcontroller Library
emilmont 1:46ce1e16c870 2 * Copyright (c) 2006-2012 ARM Limited
emilmont 1:46ce1e16c870 3 *
emilmont 1:46ce1e16c870 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
emilmont 1:46ce1e16c870 5 * of this software and associated documentation files (the "Software"), to deal
emilmont 1:46ce1e16c870 6 * in the Software without restriction, including without limitation the rights
emilmont 1:46ce1e16c870 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
emilmont 1:46ce1e16c870 8 * copies of the Software, and to permit persons to whom the Software is
emilmont 1:46ce1e16c870 9 * furnished to do so, subject to the following conditions:
emilmont 1:46ce1e16c870 10 *
emilmont 1:46ce1e16c870 11 * The above copyright notice and this permission notice shall be included in
emilmont 1:46ce1e16c870 12 * all copies or substantial portions of the Software.
emilmont 1:46ce1e16c870 13 *
emilmont 1:46ce1e16c870 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
emilmont 1:46ce1e16c870 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
emilmont 1:46ce1e16c870 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
emilmont 1:46ce1e16c870 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
emilmont 1:46ce1e16c870 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
emilmont 1:46ce1e16c870 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
emilmont 1:46ce1e16c870 20 * SOFTWARE.
emilmont 1:46ce1e16c870 21 */
emilmont 1:46ce1e16c870 22 #include "ff.h"
emilmont 1:46ce1e16c870 23 #include "ffconf.h"
emilmont 2:b6669c987c8e 24 #include "mbed_debug.h"
emilmont 1:46ce1e16c870 25
emilmont 1:46ce1e16c870 26 #include "FATFileHandle.h"
emilmont 1:46ce1e16c870 27
WiredHome 8:f08059355141 28 //#define DEBUG "FtFH"
WiredHome 8:f08059355141 29 // ...
WiredHome 8:f08059355141 30 // INFO("Stuff to show %d", var); // new-line is automatically appended
WiredHome 8:f08059355141 31 //
WiredHome 8:f08059355141 32 #if (defined(DEBUG) && !defined(TARGET_LPC11U24))
WiredHome 8:f08059355141 33 #include "mbed.h"
WiredHome 8:f08059355141 34 #define INFO(x, ...) std::printf("[INF %s %4d] "x"\r\n", DEBUG, __LINE__, ##__VA_ARGS__);
WiredHome 8:f08059355141 35 #define WARN(x, ...) std::printf("[WRN %s %4d] "x"\r\n", DEBUG, __LINE__, ##__VA_ARGS__);
WiredHome 8:f08059355141 36 #define ERR(x, ...) std::printf("[ERR %s %4d] "x"\r\n", DEBUG, __LINE__, ##__VA_ARGS__);
WiredHome 8:f08059355141 37 static void HexDump(const char * title, const uint8_t * p, int count)
WiredHome 8:f08059355141 38 {
WiredHome 8:f08059355141 39 int i;
WiredHome 8:f08059355141 40 char buf[100] = "0000: ";
WiredHome 8:f08059355141 41
WiredHome 8:f08059355141 42 if (*title)
WiredHome 8:f08059355141 43 INFO("%s", title);
WiredHome 8:f08059355141 44 for (i=0; i<count; ) {
WiredHome 8:f08059355141 45 sprintf(buf + strlen(buf), "%02X ", *(p+i));
WiredHome 8:f08059355141 46 if ((++i & 0x0F) == 0x00) {
WiredHome 8:f08059355141 47 INFO("%s", buf);
WiredHome 8:f08059355141 48 if (i < count)
WiredHome 8:f08059355141 49 sprintf(buf, "%04X: ", i);
WiredHome 8:f08059355141 50 else
WiredHome 8:f08059355141 51 buf[0] = '\0';
WiredHome 8:f08059355141 52 }
WiredHome 8:f08059355141 53 }
WiredHome 8:f08059355141 54 if (strlen(buf))
WiredHome 8:f08059355141 55 INFO("%s", buf);
WiredHome 8:f08059355141 56 }
WiredHome 8:f08059355141 57 #else
WiredHome 8:f08059355141 58 #define INFO(x, ...)
WiredHome 8:f08059355141 59 #define WARN(x, ...)
WiredHome 8:f08059355141 60 #define ERR(x, ...)
WiredHome 8:f08059355141 61 #define HexDump(a, b, c)
WiredHome 8:f08059355141 62 #endif
WiredHome 8:f08059355141 63
emilmont 1:46ce1e16c870 64 FATFileHandle::FATFileHandle(FIL fh) {
emilmont 1:46ce1e16c870 65 _fh = fh;
emilmont 1:46ce1e16c870 66 }
emilmont 1:46ce1e16c870 67
emilmont 1:46ce1e16c870 68 int FATFileHandle::close() {
emilmont 1:46ce1e16c870 69 int retval = f_close(&_fh);
emilmont 1:46ce1e16c870 70 delete this;
emilmont 1:46ce1e16c870 71 return retval;
emilmont 1:46ce1e16c870 72 }
emilmont 1:46ce1e16c870 73
emilmont 1:46ce1e16c870 74 ssize_t FATFileHandle::write(const void* buffer, size_t length) {
emilmont 1:46ce1e16c870 75 UINT n;
emilmont 1:46ce1e16c870 76 FRESULT res = f_write(&_fh, buffer, length, &n);
mbed_official 4:3ff2606d5713 77 if (res) {
WiredHome 8:f08059355141 78 INFO("f_write() failed: %d", res);
emilmont 1:46ce1e16c870 79 return -1;
emilmont 1:46ce1e16c870 80 }
emilmont 1:46ce1e16c870 81 return n;
emilmont 1:46ce1e16c870 82 }
mbed_official 4:3ff2606d5713 83
emilmont 1:46ce1e16c870 84 ssize_t FATFileHandle::read(void* buffer, size_t length) {
WiredHome 8:f08059355141 85 INFO("read(%d)", length);
emilmont 1:46ce1e16c870 86 UINT n;
emilmont 1:46ce1e16c870 87 FRESULT res = f_read(&_fh, buffer, length, &n);
emilmont 1:46ce1e16c870 88 if (res) {
WiredHome 8:f08059355141 89 INFO("f_read() failed: %d", res);
emilmont 1:46ce1e16c870 90 return -1;
emilmont 1:46ce1e16c870 91 }
emilmont 1:46ce1e16c870 92 return n;
emilmont 1:46ce1e16c870 93 }
emilmont 1:46ce1e16c870 94
emilmont 1:46ce1e16c870 95 int FATFileHandle::isatty() {
emilmont 1:46ce1e16c870 96 return 0;
emilmont 1:46ce1e16c870 97 }
emilmont 1:46ce1e16c870 98
emilmont 1:46ce1e16c870 99 off_t FATFileHandle::lseek(off_t position, int whence) {
emilmont 1:46ce1e16c870 100 if (whence == SEEK_END) {
emilmont 1:46ce1e16c870 101 position += _fh.fsize;
emilmont 1:46ce1e16c870 102 } else if(whence==SEEK_CUR) {
emilmont 1:46ce1e16c870 103 position += _fh.fptr;
emilmont 1:46ce1e16c870 104 }
emilmont 1:46ce1e16c870 105 FRESULT res = f_lseek(&_fh, position);
emilmont 1:46ce1e16c870 106 if (res) {
WiredHome 8:f08059355141 107 INFO("lseek failed: %d", res);
emilmont 1:46ce1e16c870 108 return -1;
emilmont 1:46ce1e16c870 109 } else {
WiredHome 8:f08059355141 110 INFO("lseek OK, returning %i", _fh.fptr);
emilmont 1:46ce1e16c870 111 return _fh.fptr;
emilmont 1:46ce1e16c870 112 }
emilmont 1:46ce1e16c870 113 }
emilmont 1:46ce1e16c870 114
emilmont 1:46ce1e16c870 115 int FATFileHandle::fsync() {
emilmont 1:46ce1e16c870 116 FRESULT res = f_sync(&_fh);
emilmont 1:46ce1e16c870 117 if (res) {
WiredHome 8:f08059355141 118 INFO("f_sync() failed: %d", res);
emilmont 1:46ce1e16c870 119 return -1;
emilmont 1:46ce1e16c870 120 }
emilmont 1:46ce1e16c870 121 return 0;
emilmont 1:46ce1e16c870 122 }
emilmont 1:46ce1e16c870 123
emilmont 1:46ce1e16c870 124 off_t FATFileHandle::flen() {
emilmont 1:46ce1e16c870 125 return _fh.fsize;
emilmont 1:46ce1e16c870 126 }
WiredHome 8:f08059355141 127