![](/media/cache/profiles/8e5e15c4e6d09c8333a17843461041a9.jpg.50x50_q85.jpg)
Web server based weather station using Sparkfun Weather Meters.
Dependencies: FatFileSystem mbed WeatherMeters SDFileSystem
Diff: FatFileSystem/MemFileSystem.h
- Revision:
- 1:c7958aa34fa1
- Parent:
- 0:616601bde9fb
--- a/FatFileSystem/MemFileSystem.h Thu Feb 23 21:38:39 2012 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,75 +0,0 @@ -/* 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