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/MemFileSystem.h@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 - MemFileSystem
vpcola 0:572d27f56fcd 2 * Copyright (c) 2008, sford
vpcola 0:572d27f56fcd 3 */
vpcola 0:572d27f56fcd 4
vpcola 0:572d27f56fcd 5
vpcola 0:572d27f56fcd 6 #ifndef MBED_MEMFILESYSTEM_H
vpcola 0:572d27f56fcd 7 #define MBED_MEMFILESYSTEM_H
vpcola 0:572d27f56fcd 8
vpcola 0:572d27f56fcd 9 #include "FATFileSystem.h"
vpcola 0:572d27f56fcd 10
vpcola 0:572d27f56fcd 11 namespace mbed
vpcola 0:572d27f56fcd 12 {
vpcola 0:572d27f56fcd 13
vpcola 0:572d27f56fcd 14 class MemFileSystem : public FATFileSystem
vpcola 0:572d27f56fcd 15 {
vpcola 0:572d27f56fcd 16 public:
vpcola 0:572d27f56fcd 17
vpcola 0:572d27f56fcd 18 // 2000 sectors, each 512 bytes (malloced as required)
vpcola 0:572d27f56fcd 19 char *sectors[2000];
vpcola 0:572d27f56fcd 20
vpcola 0:572d27f56fcd 21 MemFileSystem(const char* name) : FATFileSystem(name) {
vpcola 0:572d27f56fcd 22 memset(sectors, 0, sizeof(sectors));
vpcola 0:572d27f56fcd 23 }
vpcola 0:572d27f56fcd 24
vpcola 0:572d27f56fcd 25 virtual ~MemFileSystem() {
vpcola 0:572d27f56fcd 26 for(int i = 0; i < 2000; i++) {
vpcola 0:572d27f56fcd 27 if(sectors[i]) {
vpcola 0:572d27f56fcd 28 free(sectors[i]);
vpcola 0:572d27f56fcd 29 }
vpcola 0:572d27f56fcd 30 }
vpcola 0:572d27f56fcd 31 }
vpcola 0:572d27f56fcd 32
vpcola 0:572d27f56fcd 33 // read a sector in to the buffer, return 0 if ok
vpcola 0:572d27f56fcd 34 virtual int disk_read(char *buffer, int sector) {
vpcola 0:572d27f56fcd 35 if(sectors[sector] == 0) {
vpcola 0:572d27f56fcd 36 // nothing allocated means sector is empty
vpcola 0:572d27f56fcd 37 memset(buffer, 0, 512);
vpcola 0:572d27f56fcd 38 } else {
vpcola 0:572d27f56fcd 39 memcpy(buffer, sectors[sector], 512);
vpcola 0:572d27f56fcd 40 }
vpcola 0:572d27f56fcd 41 return 0;
vpcola 0:572d27f56fcd 42 }
vpcola 0:572d27f56fcd 43
vpcola 0:572d27f56fcd 44 // write a sector from the buffer, return 0 if ok
vpcola 0:572d27f56fcd 45 virtual int disk_write(const char *buffer, int sector) {
vpcola 0:572d27f56fcd 46 // if buffer is zero deallocate sector
vpcola 0:572d27f56fcd 47 char zero[512];
vpcola 0:572d27f56fcd 48 memset(zero, 0, 512);
vpcola 0:572d27f56fcd 49 if(memcmp(zero, buffer, 512)==0) {
vpcola 0:572d27f56fcd 50 if(sectors[sector] != 0) {
vpcola 0:572d27f56fcd 51 free(sectors[sector]);
vpcola 0:572d27f56fcd 52 sectors[sector] = 0;
vpcola 0:572d27f56fcd 53 }
vpcola 0:572d27f56fcd 54 return 0;
vpcola 0:572d27f56fcd 55 }
vpcola 0:572d27f56fcd 56 // else allocate a sector if needed, and write
vpcola 0:572d27f56fcd 57 if(sectors[sector] == 0) {
vpcola 0:572d27f56fcd 58 char *sec = (char*)malloc(512);
vpcola 0:572d27f56fcd 59 if(sec==0) {
vpcola 0:572d27f56fcd 60 return 1; // out of memory
vpcola 0:572d27f56fcd 61 }
vpcola 0:572d27f56fcd 62 sectors[sector] = sec;
vpcola 0:572d27f56fcd 63 }
vpcola 0:572d27f56fcd 64 memcpy(sectors[sector], buffer, 512);
vpcola 0:572d27f56fcd 65 return 0;
vpcola 0:572d27f56fcd 66 }
vpcola 0:572d27f56fcd 67
vpcola 0:572d27f56fcd 68 // return the number of sectors
vpcola 0:572d27f56fcd 69 virtual int disk_sectors() {
vpcola 0:572d27f56fcd 70 return sizeof(sectors)/sizeof(sectors[0]);
vpcola 0:572d27f56fcd 71 }
vpcola 0:572d27f56fcd 72
vpcola 0:572d27f56fcd 73 };
vpcola 0:572d27f56fcd 74
vpcola 0:572d27f56fcd 75 }
vpcola 0:572d27f56fcd 76
vpcola 0:572d27f56fcd 77 #endif