rt-thread/components/dfs/filesystems/yaffs2

how to use yaffs under rt-thread.



There are three steps.

1. get yaffs tarball from official repo.

   the repo of official repo is here.

     http://www.aleph1.co.uk/gitweb?p=yaffs2.git;a=summary

   then you should find the 2011-6-28's snapshot, download the tarball

     http://www.aleph1.co.uk/gitweb?p=yaffs2.git;a=snapshot;h=2df51cdb98e799c4d10b4cc7dd7e8858aa79e7d8;sf=tgz

  

   decompress the yaffs.tar.gz to rt-thread\components\dfs\filesystems\yaffs2\yaffs



2. patch yaffs.diff    

    open an terminal.

    (1) on windows

       open cmd command prompt, then use [cd] command to come current path

       for example 

         F:\Project\svn\rt-thread\components\dfs\filesystems\yaffs2>

       then type command 

         patch -p1 < yaffs.diff



       you will get some log information as followings 

         F:\Project\svn\rt-thread\components\dfs\filesystems\yaffs2>patch -p1 < yaffs.diff

         patching file `dfs_yaffs2.c'

         patching file `yaffs/direct/yaffs_list.h'

         patching file `yaffs/direct/yaffs_nandif.c'

         patching file `yaffs/direct/ydirectenv.h'

         patching file `yaffs/direct/yportenv.h'

         patching file `yaffs_nandcfg.c'

         patching file `yaffs_osglue.c'



       now you can delete yaffs.diff

       there is another patch file, as the name shows, it is to fix compile

       warning, so it is not necessary. If you want, you can use the

       following command.

         patch -p1 < fixwarning.diff



    (2) on linux

       Help yourself. Since you have use linux as your os, I believe in you. 



3.add nand driver and compile 

    In order to use yaffs, you should provide a nand driver which is needed

    by yaffs. There is an example file in rt-thread\components\dfs\filesystems\uffs\nand.

    you should modify yaffs_nandcfg.c according to your nand driver.

 then you can use scons or IDE like MDK or IAR to compile.



 enjoy !