SDFileSystem3 - publication inutile mais obligée

ENSMM » Code » SDFileSystem3

publication inutile mais obligée

FATFileSystem/FATFileSystem.cpp@0:8b2a15992487, 2020-01-28 (annotated)

Committer:: adrevong
Date:: Tue Jan 28 11:14:21 2020 +0000
Revision:: 0:8b2a15992487

Who changed what in which revision?

User	Revision	Line number	New contents of line
adrevong	0:8b2a15992487	1	/* mbed Microcontroller Library
adrevong	0:8b2a15992487	2	* Copyright (c) 2006-2012 ARM Limited
adrevong	0:8b2a15992487	3	*
adrevong	0:8b2a15992487	4	* Permission is hereby granted, free of charge, to any person obtaining a copy
adrevong	0:8b2a15992487	5	* of this software and associated documentation files (the "Software"), to deal
adrevong	0:8b2a15992487	6	* in the Software without restriction, including without limitation the rights
adrevong	0:8b2a15992487	7	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
adrevong	0:8b2a15992487	8	* copies of the Software, and to permit persons to whom the Software is
adrevong	0:8b2a15992487	9	* furnished to do so, subject to the following conditions:
adrevong	0:8b2a15992487	10	*
adrevong	0:8b2a15992487	11	* The above copyright notice and this permission notice shall be included in
adrevong	0:8b2a15992487	12	* all copies or substantial portions of the Software.
adrevong	0:8b2a15992487	13	*
adrevong	0:8b2a15992487	14	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
adrevong	0:8b2a15992487	15	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
adrevong	0:8b2a15992487	16	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
adrevong	0:8b2a15992487	17	* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
adrevong	0:8b2a15992487	18	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
adrevong	0:8b2a15992487	19	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
adrevong	0:8b2a15992487	20	* SOFTWARE.
adrevong	0:8b2a15992487	21	*/
adrevong	0:8b2a15992487	22	#include "mbed.h"
adrevong	0:8b2a15992487	23
adrevong	0:8b2a15992487	24	#include "ffconf.h"
adrevong	0:8b2a15992487	25	#include "mbed_debug.h"
adrevong	0:8b2a15992487	26
adrevong	0:8b2a15992487	27	#include "FATFileSystem.h"
adrevong	0:8b2a15992487	28	#include "FATFileHandle.h"
adrevong	0:8b2a15992487	29	#include "FATDirHandle.h"
adrevong	0:8b2a15992487	30
adrevong	0:8b2a15992487	31	DWORD get_fattime(void) {
adrevong	0:8b2a15992487	32	time_t rawtime;
adrevong	0:8b2a15992487	33	time(&rawtime);
adrevong	0:8b2a15992487	34	struct tm *ptm = localtime(&rawtime);
adrevong	0:8b2a15992487	35	return (DWORD)(ptm->tm_year - 80) << 25
adrevong	0:8b2a15992487	36	\| (DWORD)(ptm->tm_mon + 1 ) << 21
adrevong	0:8b2a15992487	37	\| (DWORD)(ptm->tm_mday ) << 16
adrevong	0:8b2a15992487	38	\| (DWORD)(ptm->tm_hour ) << 11
adrevong	0:8b2a15992487	39	\| (DWORD)(ptm->tm_min ) << 5
adrevong	0:8b2a15992487	40	\| (DWORD)(ptm->tm_sec/2 );
adrevong	0:8b2a15992487	41	}
adrevong	0:8b2a15992487	42
adrevong	0:8b2a15992487	43	FATFileSystem *FATFileSystem::_ffs[_VOLUMES] = {0};
adrevong	0:8b2a15992487	44
adrevong	0:8b2a15992487	45	FATFileSystem::FATFileSystem(const char* n) : FileSystemLike(n) {
adrevong	0:8b2a15992487	46	debug_if(FFS_DBG, "FATFileSystem(%s)\n", n);
adrevong	0:8b2a15992487	47	for(int i=0; i<_VOLUMES; i++) {
adrevong	0:8b2a15992487	48	if(_ffs[i] == 0) {
adrevong	0:8b2a15992487	49	_ffs[i] = this;
adrevong	0:8b2a15992487	50	_fsid[0] = '0' + i;
adrevong	0:8b2a15992487	51	_fsid[1] = '\0';
adrevong	0:8b2a15992487	52	debug_if(FFS_DBG, "Mounting [%s] on ffs drive [%s]\n", getName(), _fsid);
adrevong	0:8b2a15992487	53	f_mount(&_fs, _fsid, 0);
adrevong	0:8b2a15992487	54	return;
adrevong	0:8b2a15992487	55	}
adrevong	0:8b2a15992487	56	}
adrevong	0:8b2a15992487	57	error("Couldn't create %s in FATFileSystem::FATFileSystem\n", n);
adrevong	0:8b2a15992487	58	}
adrevong	0:8b2a15992487	59
adrevong	0:8b2a15992487	60	FATFileSystem::~FATFileSystem() {
adrevong	0:8b2a15992487	61	for (int i=0; i<_VOLUMES; i++) {
adrevong	0:8b2a15992487	62	if (_ffs[i] == this) {
adrevong	0:8b2a15992487	63	_ffs[i] = 0;
adrevong	0:8b2a15992487	64	f_mount(NULL, _fsid, 0);
adrevong	0:8b2a15992487	65	}
adrevong	0:8b2a15992487	66	}
adrevong	0:8b2a15992487	67	}
adrevong	0:8b2a15992487	68
adrevong	0:8b2a15992487	69	FileHandle FATFileSystem::open(const char name, int flags) {
adrevong	0:8b2a15992487	70	debug_if(FFS_DBG, "open(%s) on filesystem [%s], drv [%s]\n", name, getName(), _fsid);
adrevong	0:8b2a15992487	71	char n[64];
adrevong	0:8b2a15992487	72	sprintf(n, "%s:/%s", _fsid, name);
adrevong	0:8b2a15992487	73
adrevong	0:8b2a15992487	74	/* POSIX flags -> FatFS open mode */
adrevong	0:8b2a15992487	75	BYTE openmode;
adrevong	0:8b2a15992487	76	if (flags & O_RDWR) {
adrevong	0:8b2a15992487	77	openmode = FA_READ\|FA_WRITE;
adrevong	0:8b2a15992487	78	} else if(flags & O_WRONLY) {
adrevong	0:8b2a15992487	79	openmode = FA_WRITE;
adrevong	0:8b2a15992487	80	} else {
adrevong	0:8b2a15992487	81	openmode = FA_READ;
adrevong	0:8b2a15992487	82	}
adrevong	0:8b2a15992487	83	if(flags & O_CREAT) {
adrevong	0:8b2a15992487	84	if(flags & O_TRUNC) {
adrevong	0:8b2a15992487	85	openmode \|= FA_CREATE_ALWAYS;
adrevong	0:8b2a15992487	86	} else {
adrevong	0:8b2a15992487	87	openmode \|= FA_OPEN_ALWAYS;
adrevong	0:8b2a15992487	88	}
adrevong	0:8b2a15992487	89	}
adrevong	0:8b2a15992487	90
adrevong	0:8b2a15992487	91	FIL fh;
adrevong	0:8b2a15992487	92	FRESULT res = f_open(&fh, n, openmode);
adrevong	0:8b2a15992487	93	if (res) {
adrevong	0:8b2a15992487	94	debug_if(FFS_DBG, "f_open('w') failed: %d\n", res);
adrevong	0:8b2a15992487	95	return NULL;
adrevong	0:8b2a15992487	96	}
adrevong	0:8b2a15992487	97	if (flags & O_APPEND) {
adrevong	0:8b2a15992487	98	f_lseek(&fh, fh.fsize);
adrevong	0:8b2a15992487	99	}
adrevong	0:8b2a15992487	100	return new FATFileHandle(fh);
adrevong	0:8b2a15992487	101	}
adrevong	0:8b2a15992487	102
adrevong	0:8b2a15992487	103	int FATFileSystem::open(FileHandle *file, const char name, int flags) {
adrevong	0:8b2a15992487	104	FileHandle *temp = open(name, flags);
adrevong	0:8b2a15992487	105	if (!temp) {
adrevong	0:8b2a15992487	106	return -1;
adrevong	0:8b2a15992487	107	}
adrevong	0:8b2a15992487	108
adrevong	0:8b2a15992487	109	*file = temp;
adrevong	0:8b2a15992487	110	return 0;
adrevong	0:8b2a15992487	111	}
adrevong	0:8b2a15992487	112
adrevong	0:8b2a15992487	113	int FATFileSystem::remove(const char *filename) {
adrevong	0:8b2a15992487	114	FRESULT res = f_unlink(filename);
adrevong	0:8b2a15992487	115	if (res) {
adrevong	0:8b2a15992487	116	debug_if(FFS_DBG, "f_unlink() failed: %d\n", res);
adrevong	0:8b2a15992487	117	return -1;
adrevong	0:8b2a15992487	118	}
adrevong	0:8b2a15992487	119	return 0;
adrevong	0:8b2a15992487	120	}
adrevong	0:8b2a15992487	121
adrevong	0:8b2a15992487	122	int FATFileSystem::rename(const char oldname, const char newname) {
adrevong	0:8b2a15992487	123	FRESULT res = f_rename(oldname, newname);
adrevong	0:8b2a15992487	124	if (res) {
adrevong	0:8b2a15992487	125	debug_if(FFS_DBG, "f_rename() failed: %d\n", res);
adrevong	0:8b2a15992487	126	return -1;
adrevong	0:8b2a15992487	127	}
adrevong	0:8b2a15992487	128	return 0;
adrevong	0:8b2a15992487	129	}
adrevong	0:8b2a15992487	130
adrevong	0:8b2a15992487	131	int FATFileSystem::format() {
adrevong	0:8b2a15992487	132	FRESULT res = f_mkfs(_fsid, 0, 512); // Logical drive number, Partitioning rule, Allocation unit size (bytes per cluster)
adrevong	0:8b2a15992487	133	if (res) {
adrevong	0:8b2a15992487	134	debug_if(FFS_DBG, "f_mkfs() failed: %d\n", res);
adrevong	0:8b2a15992487	135	return -1;
adrevong	0:8b2a15992487	136	}
adrevong	0:8b2a15992487	137	return 0;
adrevong	0:8b2a15992487	138	}
adrevong	0:8b2a15992487	139
adrevong	0:8b2a15992487	140	DirHandle FATFileSystem::opendir(const char name) {
adrevong	0:8b2a15992487	141	FATFS_DIR dir;
adrevong	0:8b2a15992487	142	FRESULT res = f_opendir(&dir, name);
adrevong	0:8b2a15992487	143	if (res != 0) {
adrevong	0:8b2a15992487	144	return NULL;
adrevong	0:8b2a15992487	145	}
adrevong	0:8b2a15992487	146	return new FATDirHandle(dir);
adrevong	0:8b2a15992487	147	}
adrevong	0:8b2a15992487	148
adrevong	0:8b2a15992487	149	int FATFileSystem::open(DirHandle *dir, const char name) {
adrevong	0:8b2a15992487	150	DirHandle *temp = opendir(name);
adrevong	0:8b2a15992487	151	if (!temp) {
adrevong	0:8b2a15992487	152	return -1;
adrevong	0:8b2a15992487	153	}
adrevong	0:8b2a15992487	154
adrevong	0:8b2a15992487	155	*dir = temp;
adrevong	0:8b2a15992487	156	return 0;
adrevong	0:8b2a15992487	157	}
adrevong	0:8b2a15992487	158
adrevong	0:8b2a15992487	159	int FATFileSystem::mkdir(const char *name, mode_t mode) {
adrevong	0:8b2a15992487	160	FRESULT res = f_mkdir(name);
adrevong	0:8b2a15992487	161	return res == 0 ? 0 : -1;
adrevong	0:8b2a15992487	162	}
adrevong	0:8b2a15992487	163
adrevong	0:8b2a15992487	164	int FATFileSystem::mount() {
adrevong	0:8b2a15992487	165	FRESULT res = f_mount(&_fs, _fsid, 1);
adrevong	0:8b2a15992487	166	return res == 0 ? 0 : -1;
adrevong	0:8b2a15992487	167	}
adrevong	0:8b2a15992487	168
adrevong	0:8b2a15992487	169	int FATFileSystem::unmount() {
adrevong	0:8b2a15992487	170	if (disk_sync())
adrevong	0:8b2a15992487	171	return -1;
adrevong	0:8b2a15992487	172	FRESULT res = f_mount(NULL, _fsid, 0);
adrevong	0:8b2a15992487	173	return res == 0 ? 0 : -1;
adrevong	0:8b2a15992487	174	}

Repository toolbox

Export to desktop IDE

Build repository

Repository details

Type:	Program
Created:	28 Jan 2020
Imports:	0
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	0
Followers:	62

FATFileSystem/FATFileSystem.cpp@0:8b2a15992487, 2020-01-28 (annotated)

Who changed what in which revision?

Repository toolbox

Repository details

Important Information for this Arm website

Access Warning