Re: How to have a ROM file system on AT91SAM9260?

["Ulf Samuelsson" <ulf@xxxxxxxxx>]

> > Well JFFS2 is not a ROM file system but...
> >
> > The typical problem in doing this is to get the JFFS2 parameters wrong
> > Buildroot (buildroot.uclibc.org) is now setup to generate a
> > JFFS2 file system on dataflash
> >
> > Download buildroot, buuild a file system and set target info to JFFS2.
>
> You said that JFFS2 is not a ROM file system, but is it what I need? I 
> need
> something to save the files I modified in flash. With ramfs, when I change 
> a
> file and reboot the board, I loose my modifications.

ROM = Read Only Memory.

It is inherently NOT possible to write to a ROM.
You need a Non-Volatile File System and JFFS2 is OK for this.

> I'm going to try to download the latest verison of buildroot to generate 
> the
> JFFS2 file system.

> How should I configure the linux kernel
Include JFFS2
and SPI/Dataflash support at least.

> and what is the
> command line to launch it?

This is boot monitor specific, if you are using U-boot there
is documentation on www.denx.de


> Regards
> Nicolas


Best Regards
Ulf Samuelsson 


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