[ECOS] Flash file system

[ECOS] Flash file system

[james chen]

Hi,
     Has anyone ported JFFS(Journaling Flash File System, developed by Axis
Communications AB in Sweden) to eCos?
Best Regards,
James

[ECOS] Additional serial drivers & file systems & redboot for i386 targets

[Teng Chee Wan Philip]

Hi,

I have a few questions about the i386 PC:

1.  The i386 PC target has 2 serial ports.  I would like to add a serial I/O 
card to it to get more serial I/O ports and write a serial I/O driver for it.  
What would be the neatest way to do it?  The serial I/O card needs some 
additional initialisation to 'activate' it.  Do I modify 
packages/io/serial/v1_3_1/i386/pc_serial.c and the corresponding .cdl file 
directly?  I hope to use the configuration tool to enable or disable the driver 
depending on whether the serial card is installed or not.

2.  I read some exchanges about having a DOS Filesystem on ECOS.  Personally, I 
felt this will be useful, esp for my application where I need to store large 
amount of data on harddisks.  Is this coming in the foreseeable future?  
Meanwhile, is there any way I can make use of the harddisk to store my data 
under ECOS?  Using raw filesystems(if any)or other formats?

3.  Is redboot supported on i386 target?  I can't find any.  Is there any reason 
why redboot is not supported?  Or are we just waiting for someone to develop it?

regards,
Philip Teng

Re: [ECOS] Additional serial drivers & file systems & redboot for i386 targets

[Jonathan Larmour]

Teng Chee Wan Philip wrote:
> 
> Hi,
> 
> I have a few questions about the i386 PC:
> 
> 1.  The i386 PC target has 2 serial ports.  I would like to add a serial I/O
> card to it to get more serial I/O ports and write a serial I/O driver for it.
> What would be the neatest way to do it?  The serial I/O card needs some
> additional initialisation to 'activate' it.  Do I modify
> packages/io/serial/v1_3_1/i386/pc_serial.c and the corresponding .cdl file
> directly?  I hope to use the configuration tool to enable or disable the driver
> depending on whether the serial card is installed or not.

Sounds about right.
 
> 2.  I read some exchanges about having a DOS Filesystem on ECOS.  Personally, I
> felt this will be useful, esp for my application where I need to store large
> amount of data on harddisks.  Is this coming in the foreseeable future?
> Meanwhile, is there any way I can make use of the harddisk to store my data
> under ECOS?  Using raw filesystems(if any)or other formats?

As far as I know, there's no effort currently to provide a DOS filesystem
_publically_ for eCos. I know some people out there have written their own.

> 3.  Is redboot supported on i386 target?  I can't find any.  Is there any reason
> why redboot is not supported?  Or are we just waiting for someone to develop it?

It has been developed. It's a long story, but if you search the mail
archives at http://sources.redhat.com/ml/ecos-discuss you'll find patches
from Fabrice Gautier. Note that they may not apply well to the current CVS
so you may have to check out CVS from an earlier date.

Jifl
-- 
Red Hat, Rustat House, Clifton Road, Cambridge, UK. Tel: +44 (1223) 271062
Maybe this world is another planet's Hell -Aldous Huxley || Opinions==mine

Re: [ECOS] Flash file system

[Jonathan Larmour]

james chen wrote:
> 
> Hi,
>      Has anyone ported JFFS(Journaling Flash File System, developed by Axis
> Communications AB in Sweden) to eCos?

No, and it's not very likely because it's GPL'd and has been superseded by
JFFS2. Porting _that_ sounds much more interesting, but we have no plans to
do that right now. Of course if anyone contributed it, or contracted Red
Hat to do it, that would do it :-).

<gratuitous advert> 
If people are considering new ports, extensions, customizations, or
improvements to eCos or RedBoot, and would be interested in Red Hat helping
them do this, just e-mail ecos-info@redhat.com to discuss it further.
</gratuitous advert>

Jifl
-- 
Red Hat, Rustat House, Clifton Road, Cambridge, UK. Tel: +44 (1223) 271062
Maybe this world is another planet's Hell -Aldous Huxley || Opinions==mine

Re: [ECOS] Flash file system

[james chen]

        I have looked the source code of JFFS2, but it is based on linux's
VFS. Now I want to port it to eCos, I don't know how to start it, does I
need port VFS+JFFS2 to eCos or only need to JFFS2 to eCos? any suggestion is
welcom!

Best Regards,
james


----- Original Message -----
From: Jonathan Larmour <jlarmour@redhat.com>
To: james chen <james_ch1@sina.com>
Cc: <ecos-discuss@sources.redhat.com>
Sent: Saturday, May 19, 2001 3:23 AM
Subject: Re: [ECOS] Flash file system


> james chen wrote:
> >
> > Hi,
> >      Has anyone ported JFFS(Journaling Flash File System, developed by
Axis
> > Communications AB in Sweden) to eCos?
>
> No, and it's not very likely because it's GPL'd and has been superseded by
> JFFS2. Porting _that_ sounds much more interesting, but we have no plans
to
> do that right now. Of course if anyone contributed it, or contracted Red
> Hat to do it, that would do it :-).
>
> <gratuitous advert>
> If people are considering new ports, extensions, customizations, or
> improvements to eCos or RedBoot, and would be interested in Red Hat
helping
> them do this, just e-mail ecos-info@redhat.com to discuss it further.
> </gratuitous advert>
>
> Jifl
> --
> Red Hat, Rustat House, Clifton Road, Cambridge, UK. Tel: +44 (1223) 271062
> Maybe this world is another planet's Hell -Aldous Huxley || Opinions==mine
>
>