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

Committer:
vpcola
Date:
2015-04-28
Revision:
0:572d27f56fcd

File content as of revision 0:572d27f56fcd:

/* mbed Microcontroller Library - MemFileSystem
 * Copyright (c) 2008, sford
 */


#ifndef MBED_MEMFILESYSTEM_H
#define MBED_MEMFILESYSTEM_H

#include "FATFileSystem.h"

namespace mbed
{

    class MemFileSystem : public FATFileSystem
    {
    public:
    
        // 2000 sectors, each 512 bytes (malloced as required)
        char *sectors[2000];
    
        MemFileSystem(const char* name) : FATFileSystem(name) {
            memset(sectors, 0, sizeof(sectors));
        }
    
        virtual ~MemFileSystem() {
            for(int i = 0; i < 2000; i++) {
                if(sectors[i]) {
                    free(sectors[i]);
                }
            }
        }
    
        // read a sector in to the buffer, return 0 if ok
        virtual int disk_read(char *buffer, int sector) {
            if(sectors[sector] == 0) {
                // nothing allocated means sector is empty
                memset(buffer, 0, 512);
            } else {
                memcpy(buffer, sectors[sector], 512);
            }
            return 0;
        }
    
        // write a sector from the buffer, return 0 if ok
        virtual int disk_write(const char *buffer, int sector) {
            // if buffer is zero deallocate sector
            char zero[512];
            memset(zero, 0, 512);
            if(memcmp(zero, buffer, 512)==0) {
                if(sectors[sector] != 0) {
                    free(sectors[sector]);
                    sectors[sector] = 0;
                }
                return 0;
            }
            // else allocate a sector if needed, and write
            if(sectors[sector] == 0) {
                char *sec = (char*)malloc(512);
                if(sec==0) {
                    return 1; // out of memory
                }
                sectors[sector] = sec;
            }
            memcpy(sectors[sector], buffer, 512);
            return 0;
        }
    
        // return the number of sectors
        virtual int disk_sectors() {
            return sizeof(sectors)/sizeof(sectors[0]);
        }
    
    };

}

#endif