Vergil Cola / SDFileSystem2

A fork of the original SDFileSystem, added only stat() for getting file information.

Dependents:   FRDM_K64F_IOT

Added code to the original SDFileSystem to export the stat() command. It would now be possible to get the FILEINFO struct of a directory entry to get information such as file size, etc.

SDFileSystem2 usage

#include "SDFileSystem.h"
SDFileSystem sd(p5,p6,p7,p8,"sd"); // mosi, miso, sck, cs 

static void cmd_ls(Stream * chp, int argc, char * argv[])
{
   DIR * dp;
   struct dirent * dirp;
   FILINFO fileInfo;
   char dirroot[256];
   
   if (argc >= 1)
       sprintf(dirroot, "/sd/%s", argv[0]);
   else
       sprintf(dirroot, "/sd");
   
   chp->printf("Listing directory [%s]\r\n", dirroot);
   
   dp = opendir(dirroot);			
   while((dirp = readdir(dp)) != NULL)
   {
       if (sd.stat(dirp->d_name, &fileInfo) == 0)
       {
           if (fileInfo.fattrib & AM_DIR )
                   chp->printf("<DIR>\t\t");
           else
                   chp->printf("%ld\t\t", fileInfo.fsize);
       }
       chp->printf("%s\r\n", dirp->d_name);
   }
   closedir(dp);
}

FATFileSystem/FATFileSystem.cpp@0:572d27f56fcd, 2015-04-28 (annotated)

Committer:
vpcola
Date:
Tue Apr 28 16:55:30 2015 +0000
Revision:
0:572d27f56fcd
Added stat() to get file information

Who changed what in which revision?

UserRevisionLine numberNew contents of line
vpcola 0:572d27f56fcd 1 /* mbed Microcontroller Library
vpcola 0:572d27f56fcd 2 * Copyright (c) 2006-2012 ARM Limited
vpcola 0:572d27f56fcd 3 *
vpcola 0:572d27f56fcd 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
vpcola 0:572d27f56fcd 5 * of this software and associated documentation files (the "Software"), to deal
vpcola 0:572d27f56fcd 6 * in the Software without restriction, including without limitation the rights
vpcola 0:572d27f56fcd 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
vpcola 0:572d27f56fcd 8 * copies of the Software, and to permit persons to whom the Software is
vpcola 0:572d27f56fcd 9 * furnished to do so, subject to the following conditions:
vpcola 0:572d27f56fcd 10 *
vpcola 0:572d27f56fcd 11 * The above copyright notice and this permission notice shall be included in
vpcola 0:572d27f56fcd 12 * all copies or substantial portions of the Software.
vpcola 0:572d27f56fcd 13 *
vpcola 0:572d27f56fcd 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
vpcola 0:572d27f56fcd 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
vpcola 0:572d27f56fcd 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
vpcola 0:572d27f56fcd 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
vpcola 0:572d27f56fcd 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
vpcola 0:572d27f56fcd 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
vpcola 0:572d27f56fcd 20 * SOFTWARE.
vpcola 0:572d27f56fcd 21 */
vpcola 0:572d27f56fcd 22 #include "mbed.h"
vpcola 0:572d27f56fcd 23
vpcola 0:572d27f56fcd 24 #include "ffconf.h"
vpcola 0:572d27f56fcd 25 #include "mbed_debug.h"
vpcola 0:572d27f56fcd 26
vpcola 0:572d27f56fcd 27 #include "FATFileSystem.h"
vpcola 0:572d27f56fcd 28 #include "FATFileHandle.h"
vpcola 0:572d27f56fcd 29 #include "FATDirHandle.h"
vpcola 0:572d27f56fcd 30
vpcola 0:572d27f56fcd 31 DWORD get_fattime(void) {
vpcola 0:572d27f56fcd 32 time_t rawtime;
vpcola 0:572d27f56fcd 33 time(&rawtime);
vpcola 0:572d27f56fcd 34 struct tm *ptm = localtime(&rawtime);
vpcola 0:572d27f56fcd 35 return (DWORD)(ptm->tm_year - 80) << 25
vpcola 0:572d27f56fcd 36 | (DWORD)(ptm->tm_mon + 1 ) << 21
vpcola 0:572d27f56fcd 37 | (DWORD)(ptm->tm_mday ) << 16
vpcola 0:572d27f56fcd 38 | (DWORD)(ptm->tm_hour ) << 11
vpcola 0:572d27f56fcd 39 | (DWORD)(ptm->tm_min ) << 5
vpcola 0:572d27f56fcd 40 | (DWORD)(ptm->tm_sec/2 );
vpcola 0:572d27f56fcd 41 }
vpcola 0:572d27f56fcd 42
vpcola 0:572d27f56fcd 43 FATFileSystem *FATFileSystem::_ffs[_VOLUMES] = {0};
vpcola 0:572d27f56fcd 44
vpcola 0:572d27f56fcd 45 FATFileSystem::FATFileSystem(const char* n) : FileSystemLike(n) {
vpcola 0:572d27f56fcd 46 debug_if(FFS_DBG, "FATFileSystem(%s)\n", n);
vpcola 0:572d27f56fcd 47 for(int i=0; i<_VOLUMES; i++) {
vpcola 0:572d27f56fcd 48 if(_ffs[i] == 0) {
vpcola 0:572d27f56fcd 49 _ffs[i] = this;
vpcola 0:572d27f56fcd 50 _fsid = i;
vpcola 0:572d27f56fcd 51 debug_if(FFS_DBG, "Mounting [%s] on ffs drive [%d]\n", _name, _fsid);
vpcola 0:572d27f56fcd 52 f_mount(i, &_fs);
vpcola 0:572d27f56fcd 53 return;
vpcola 0:572d27f56fcd 54 }
vpcola 0:572d27f56fcd 55 }
vpcola 0:572d27f56fcd 56 error("Couldn't create %s in FATFileSystem::FATFileSystem\n", n);
vpcola 0:572d27f56fcd 57 }
vpcola 0:572d27f56fcd 58
vpcola 0:572d27f56fcd 59 FATFileSystem::~FATFileSystem() {
vpcola 0:572d27f56fcd 60 for (int i=0; i<_VOLUMES; i++) {
vpcola 0:572d27f56fcd 61 if (_ffs[i] == this) {
vpcola 0:572d27f56fcd 62 _ffs[i] = 0;
vpcola 0:572d27f56fcd 63 f_mount(i, NULL);
vpcola 0:572d27f56fcd 64 }
vpcola 0:572d27f56fcd 65 }
vpcola 0:572d27f56fcd 66 }
vpcola 0:572d27f56fcd 67
vpcola 0:572d27f56fcd 68 FileHandle *FATFileSystem::open(const char* name, int flags) {
vpcola 0:572d27f56fcd 69 debug_if(FFS_DBG, "open(%s) on filesystem [%s], drv [%d]\n", name, _name, _fsid);
vpcola 0:572d27f56fcd 70 char n[64];
vpcola 0:572d27f56fcd 71 sprintf(n, "%d:/%s", _fsid, name);
vpcola 0:572d27f56fcd 72
vpcola 0:572d27f56fcd 73 /* POSIX flags -> FatFS open mode */
vpcola 0:572d27f56fcd 74 BYTE openmode;
vpcola 0:572d27f56fcd 75 if (flags & O_RDWR) {
vpcola 0:572d27f56fcd 76 openmode = FA_READ|FA_WRITE;
vpcola 0:572d27f56fcd 77 } else if(flags & O_WRONLY) {
vpcola 0:572d27f56fcd 78 openmode = FA_WRITE;
vpcola 0:572d27f56fcd 79 } else {
vpcola 0:572d27f56fcd 80 openmode = FA_READ;
vpcola 0:572d27f56fcd 81 }
vpcola 0:572d27f56fcd 82 if(flags & O_CREAT) {
vpcola 0:572d27f56fcd 83 if(flags & O_TRUNC) {
vpcola 0:572d27f56fcd 84 openmode |= FA_CREATE_ALWAYS;
vpcola 0:572d27f56fcd 85 } else {
vpcola 0:572d27f56fcd 86 openmode |= FA_OPEN_ALWAYS;
vpcola 0:572d27f56fcd 87 }
vpcola 0:572d27f56fcd 88 }
vpcola 0:572d27f56fcd 89
vpcola 0:572d27f56fcd 90 FIL fh;
vpcola 0:572d27f56fcd 91 FRESULT res = f_open(&fh, n, openmode);
vpcola 0:572d27f56fcd 92 if (res) {
vpcola 0:572d27f56fcd 93 debug_if(FFS_DBG, "f_open('w') failed: %d\n", res);
vpcola 0:572d27f56fcd 94 return NULL;
vpcola 0:572d27f56fcd 95 }
vpcola 0:572d27f56fcd 96 if (flags & O_APPEND) {
vpcola 0:572d27f56fcd 97 f_lseek(&fh, fh.fsize);
vpcola 0:572d27f56fcd 98 }
vpcola 0:572d27f56fcd 99 return new FATFileHandle(fh);
vpcola 0:572d27f56fcd 100 }
vpcola 0:572d27f56fcd 101
vpcola 0:572d27f56fcd 102 int FATFileSystem::remove(const char *filename) {
vpcola 0:572d27f56fcd 103 FRESULT res = f_unlink(filename);
vpcola 0:572d27f56fcd 104 if (res) {
vpcola 0:572d27f56fcd 105 debug_if(FFS_DBG, "f_unlink() failed: %d\n", res);
vpcola 0:572d27f56fcd 106 return -1;
vpcola 0:572d27f56fcd 107 }
vpcola 0:572d27f56fcd 108 return 0;
vpcola 0:572d27f56fcd 109 }
vpcola 0:572d27f56fcd 110
vpcola 0:572d27f56fcd 111 int FATFileSystem::format() {
vpcola 0:572d27f56fcd 112 FRESULT res = f_mkfs(_fsid, 0, 512); // Logical drive number, Partitioning rule, Allocation unit size (bytes per cluster)
vpcola 0:572d27f56fcd 113 if (res) {
vpcola 0:572d27f56fcd 114 debug_if(FFS_DBG, "f_mkfs() failed: %d\n", res);
vpcola 0:572d27f56fcd 115 return -1;
vpcola 0:572d27f56fcd 116 }
vpcola 0:572d27f56fcd 117 return 0;
vpcola 0:572d27f56fcd 118 }
vpcola 0:572d27f56fcd 119
vpcola 0:572d27f56fcd 120 DirHandle *FATFileSystem::opendir(const char *name) {
vpcola 0:572d27f56fcd 121 FATFS_DIR dir;
vpcola 0:572d27f56fcd 122 FRESULT res = f_opendir(&dir, name);
vpcola 0:572d27f56fcd 123 if (res != 0) {
vpcola 0:572d27f56fcd 124 return NULL;
vpcola 0:572d27f56fcd 125 }
vpcola 0:572d27f56fcd 126 return new FATDirHandle(dir);
vpcola 0:572d27f56fcd 127 }
vpcola 0:572d27f56fcd 128
vpcola 0:572d27f56fcd 129 int FATFileSystem::mkdir(const char *name, mode_t mode) {
vpcola 0:572d27f56fcd 130 FRESULT res = f_mkdir(name);
vpcola 0:572d27f56fcd 131 return res == 0 ? 0 : -1;
vpcola 0:572d27f56fcd 132 }
vpcola 0:572d27f56fcd 133
vpcola 0:572d27f56fcd 134 int FATFileSystem::stat(const char * name, FILINFO * info)
vpcola 0:572d27f56fcd 135 {
vpcola 0:572d27f56fcd 136 char n[64];
vpcola 0:572d27f56fcd 137 sprintf(n, "%d:/%s", _fsid, name);
vpcola 0:572d27f56fcd 138
vpcola 0:572d27f56fcd 139 FRESULT res = f_stat(n, info);
vpcola 0:572d27f56fcd 140 if (res)
vpcola 0:572d27f56fcd 141 {
vpcola 0:572d27f56fcd 142 debug_if(FFS_DBG, "f_stat() failed: %d\n", res);
vpcola 0:572d27f56fcd 143 return -1;
vpcola 0:572d27f56fcd 144 }
vpcola 0:572d27f56fcd 145
vpcola 0:572d27f56fcd 146 return 0;
vpcola 0:572d27f56fcd 147 }