[ECOS] RE: Help -- Creating a FAT Filesystem on a NOR Flash Device

Ramgopal Kota rkota@broadcom.com
Fri Sep 11 13:26:00 GMT 2009


Hi,

I moved over to JFFS2. I created a jffs2.img file using mkfs.jffs2, loaded that file from boot loader into flash and all worked fine.  
I want to know is any way to create a empty JFFS2 file system from ecos application itself rather than uploading the file from bootloader.

    If(mount of JFFS fails) go and create empty File system
    else  continue further.

Thanks & Regards,
Ramgopal Kota
-----Original Message-----
From: John Dallaway [mailto:john@dallaway.org.uk] 
Sent: Wednesday, September 09, 2009 11:26 PM
To: Ramgopal Kota
Cc: eCos Discussion
Subject: Re: Help -- Creating a FAT Filesystem on a NOR Flash Device

Hi Ramgopal

Ramgopal Kota wrote:

> I am working on a MIPS Malta board with 16MB NOR Flash device.
> I want to create a FAT Filesystem of 2MB size from an offset.
> 
> I pulled in the required packages for FAT FS and IO.
> I created a device /dev/flash2 in the cdl file.
> 
> When I am doing a mount from my ecos application using ..
> err = mount( "/dev/flash2/", "/", "fatfs" );
> I am getting err as -1 ...

There's a fundamental problem here. The FAT filesystem is intended to
work on a _disk_ device using the eCos disk I/O layer, not on a raw
Flash device. The JFFS2 and ROM filesystems will work on a raw Flash device.

John Dallaway



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