FFT LED Display / 4180_EditThis_copy_Demo_Test

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Dependencies:   FFT

FATFileSystem/FATFileHandle.cpp@0:d6c9b09b4042, 2020-12-02 (annotated)

Committer:
annieluo2
Date:
Wed Dec 02 18:02:03 2020 +0000
Revision:
0:d6c9b09b4042
boo

Who changed what in which revision?

UserRevisionLine numberNew contents of line
annieluo2 0:d6c9b09b4042 1 /* mbed Microcontroller Library
annieluo2 0:d6c9b09b4042 2 * Copyright (c) 2006-2012 ARM Limited
annieluo2 0:d6c9b09b4042 3 *
annieluo2 0:d6c9b09b4042 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
annieluo2 0:d6c9b09b4042 5 * of this software and associated documentation files (the "Software"), to deal
annieluo2 0:d6c9b09b4042 6 * in the Software without restriction, including without limitation the rights
annieluo2 0:d6c9b09b4042 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
annieluo2 0:d6c9b09b4042 8 * copies of the Software, and to permit persons to whom the Software is
annieluo2 0:d6c9b09b4042 9 * furnished to do so, subject to the following conditions:
annieluo2 0:d6c9b09b4042 10 *
annieluo2 0:d6c9b09b4042 11 * The above copyright notice and this permission notice shall be included in
annieluo2 0:d6c9b09b4042 12 * all copies or substantial portions of the Software.
annieluo2 0:d6c9b09b4042 13 *
annieluo2 0:d6c9b09b4042 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
annieluo2 0:d6c9b09b4042 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
annieluo2 0:d6c9b09b4042 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
annieluo2 0:d6c9b09b4042 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
annieluo2 0:d6c9b09b4042 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
annieluo2 0:d6c9b09b4042 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
annieluo2 0:d6c9b09b4042 20 * SOFTWARE.
annieluo2 0:d6c9b09b4042 21 */
annieluo2 0:d6c9b09b4042 22 #include "ff.h"
annieluo2 0:d6c9b09b4042 23 #include "ffconf.h"
annieluo2 0:d6c9b09b4042 24 #include "mbed_debug.h"
annieluo2 0:d6c9b09b4042 25
annieluo2 0:d6c9b09b4042 26 #include "FATFileHandle.h"
annieluo2 0:d6c9b09b4042 27
annieluo2 0:d6c9b09b4042 28 FATFileHandle::FATFileHandle(FIL fh) {
annieluo2 0:d6c9b09b4042 29 _fh = fh;
annieluo2 0:d6c9b09b4042 30 }
annieluo2 0:d6c9b09b4042 31
annieluo2 0:d6c9b09b4042 32 int FATFileHandle::close() {
annieluo2 0:d6c9b09b4042 33 int retval = f_close(&_fh);
annieluo2 0:d6c9b09b4042 34 delete this;
annieluo2 0:d6c9b09b4042 35 return retval;
annieluo2 0:d6c9b09b4042 36 }
annieluo2 0:d6c9b09b4042 37
annieluo2 0:d6c9b09b4042 38 ssize_t FATFileHandle::write(const void* buffer, size_t length) {
annieluo2 0:d6c9b09b4042 39 UINT n;
annieluo2 0:d6c9b09b4042 40 FRESULT res = f_write(&_fh, buffer, length, &n);
annieluo2 0:d6c9b09b4042 41 if (res) {
annieluo2 0:d6c9b09b4042 42 debug_if(FFS_DBG, "f_write() failed: %d", res);
annieluo2 0:d6c9b09b4042 43 return -1;
annieluo2 0:d6c9b09b4042 44 }
annieluo2 0:d6c9b09b4042 45 return n;
annieluo2 0:d6c9b09b4042 46 }
annieluo2 0:d6c9b09b4042 47
annieluo2 0:d6c9b09b4042 48 ssize_t FATFileHandle::read(void* buffer, size_t length) {
annieluo2 0:d6c9b09b4042 49 debug_if(FFS_DBG, "read(%d)\n", length);
annieluo2 0:d6c9b09b4042 50 UINT n;
annieluo2 0:d6c9b09b4042 51 FRESULT res = f_read(&_fh, buffer, length, &n);
annieluo2 0:d6c9b09b4042 52 if (res) {
annieluo2 0:d6c9b09b4042 53 debug_if(FFS_DBG, "f_read() failed: %d\n", res);
annieluo2 0:d6c9b09b4042 54 return -1;
annieluo2 0:d6c9b09b4042 55 }
annieluo2 0:d6c9b09b4042 56 return n;
annieluo2 0:d6c9b09b4042 57 }
annieluo2 0:d6c9b09b4042 58
annieluo2 0:d6c9b09b4042 59 int FATFileHandle::isatty() {
annieluo2 0:d6c9b09b4042 60 return 0;
annieluo2 0:d6c9b09b4042 61 }
annieluo2 0:d6c9b09b4042 62
annieluo2 0:d6c9b09b4042 63 off_t FATFileHandle::lseek(off_t position, int whence) {
annieluo2 0:d6c9b09b4042 64 if (whence == SEEK_END) {
annieluo2 0:d6c9b09b4042 65 position += _fh.fsize;
annieluo2 0:d6c9b09b4042 66 } else if(whence==SEEK_CUR) {
annieluo2 0:d6c9b09b4042 67 position += _fh.fptr;
annieluo2 0:d6c9b09b4042 68 }
annieluo2 0:d6c9b09b4042 69 FRESULT res = f_lseek(&_fh, position);
annieluo2 0:d6c9b09b4042 70 if (res) {
annieluo2 0:d6c9b09b4042 71 debug_if(FFS_DBG, "lseek failed: %d\n", res);
annieluo2 0:d6c9b09b4042 72 return -1;
annieluo2 0:d6c9b09b4042 73 } else {
annieluo2 0:d6c9b09b4042 74 debug_if(FFS_DBG, "lseek OK, returning %i\n", _fh.fptr);
annieluo2 0:d6c9b09b4042 75 return _fh.fptr;
annieluo2 0:d6c9b09b4042 76 }
annieluo2 0:d6c9b09b4042 77 }
annieluo2 0:d6c9b09b4042 78
annieluo2 0:d6c9b09b4042 79 int FATFileHandle::fsync() {
annieluo2 0:d6c9b09b4042 80 FRESULT res = f_sync(&_fh);
annieluo2 0:d6c9b09b4042 81 if (res) {
annieluo2 0:d6c9b09b4042 82 debug_if(FFS_DBG, "f_sync() failed: %d\n", res);
annieluo2 0:d6c9b09b4042 83 return -1;
annieluo2 0:d6c9b09b4042 84 }
annieluo2 0:d6c9b09b4042 85 return 0;
annieluo2 0:d6c9b09b4042 86 }
annieluo2 0:d6c9b09b4042 87
annieluo2 0:d6c9b09b4042 88 off_t FATFileHandle::flen() {
annieluo2 0:d6c9b09b4042 89 return _fh.fsize;
annieluo2 0:d6c9b09b4042 90 }