A lightweight implementation of the FAT32 filesystem for generally dedicated for embedded systems. Tested successfully on ATMEGA8, Raspberry Pi, Intel Galileo.
The purpose of the LightFAT32 is to be an easy to deploy, low-resource FAT32 filesystem for an embedded application. The idea is not to go for speed or a lot of features, but basic functionality in a library that is easy to use.
This is the optional project that is done as part of the course of Operating Systems at National Institute of Technology, Warangal.
The main reference documentation has been derived from the DOS file systems FAT documentation published by Microsoft. It is present in this source code as fatgen103.pdf. This document / whitepaper has been used for reference to build some of the methods exactly as they've been done in the file system by Microsoft.
- build\ : Contains all the build code and object *.o after running the make file.
- dist \ : Contains the package for distribution after successfully executing the make file.
- fs \ : The folder on which the file system has to be mounted. Its empty at first until the test is run.
- obj \ : Contains the compiled source objects.
- scripts: Contains the shell script implement of
mkfsin a regular *nix system, implemented asmakefsfor making the file system. - src \ : This contains all the source code related to the LightFAT32 file system, it also has support to make it a FAT16.
.gitignore: This code has been written using Version Control System called
gitbuilt by Linus Trovalds. LICENSE : I have decided to open source this code on the GNU-GPL License after getting it reviewed from the professors. Makefile : The setup script that runs using the standardmakeorcmaketools in linux to run all the code compilations in order. README.md : This Documentation that you're currently reading. test.fat32: The FAT32 image.
fatgen103.pdf : Reference documentation/whitepaper from Microsoft.
fat32_ui.c : Contains code for FAT entry, support for LFN, Bios Parameter Blocks etc..,
tests.c : Contains the code tests for Read, Write, root directory using the built file system for checks. thinfat32.c: Contains the code for the implementation of the embedded file system support and sectors.
include/fat32.h : structure of the FAT32/16 and its backend functions.
include/fat32_ui.h : the functions that is given to run the code as required on the new file system.
include/thinfat32.h : Contains the code for the frontend functions, data and backend functions after decing on the FS types.
include/thinternal.h : Structures for the LFN and the Legacy functions of the *nix platform.
All the code is commented in the code as required cleanly.