[ECOS] at91rm9200 ethernet problem

[ECOS] at91rm9200 ethernet problem

[albert prasetyo]

Hi all;
I am currently developing a redboot for at91rm9200 board that can
perform TFTP transfer. However, I faced a problem which I suspect lie
in ethernet driver code (i.e. at91rm9200_ether.c).

I have applied the bug fixes from Wolfgang Köbler as indicated in link
below but the problem still persists.
http://www.cygwin.com/ml/ecos-discuss/2005-12/msg00077.html

The problem I faced is located at the part of at91rm9200_ether.c in
the function of at91rm9200_eth_deliver:

if (!(rbf_ptr->addr & RBF_OWNER))
    { return; }

Everytime I try to transfer the program through tftp using load command,
my program always quit at that point. My starting address of
rx_descriptor is at 0x23------0, which is an even address, therefore
there must be a part of code to modify it, but I am not managed to
find it.

Is there anyone know which part of the code that make the
rbf_ptr->addr change to odd address?Any help would be appreciated.

Thanks;
Albert P

--
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss

Re: [ECOS] at91rm9200 ethernet problem

[Wolfgang Köbler]

Hello,

On Thu, 27 Sep 2007 21:34:25 +0800
"albert prasetyo" <prasetyoalbert@gmail.com> wrote:
> I am currently developing a redboot for at91rm9200 board that can
> perform TFTP transfer. However, I faced a problem which I suspect lie
> in ethernet driver code (i.e. at91rm9200_ether.c).
> 
> I have applied the bug fixes from Wolfgang Köbler as indicated in link
> below but the problem still persists.
> http://www.cygwin.com/ml/ecos-discuss/2005-12/msg00077.html
What code base are you using ? When can apply this bugfix, you are
probably using old code. You should use the lastest code (especially
when starting a new project).

If nothing has changed since I last looked at it, the latest code
should be available via CVS from John Eigelaar <jeigelaar@mweb.co.za>.
Ask him for CVS access.

> The problem I faced is located at the part of at91rm9200_ether.c in
> the function of at91rm9200_eth_deliver:
> 
> if (!(rbf_ptr->addr & RBF_OWNER))
>     { return; }
Without really having read the code: This uses rbf_ptr->addr not
rbf_ptr.addr so I assume its the contents of addr, not addr itself.
I assume this refers to some flags in the at91rm9200 ethernet receive
buffer. Then it would just mean nothing has been received yet:
the receive buffer is just empty.

> Everytime I try to transfer the program through tftp using load
> command, my program always quit at that point. My starting address of
> rx_descriptor is at 0x23------0, which is an even address, therefore
> there must be a part of code to modify it, but I am not managed to
> find it.
Your program can quit ? quit to what ?

Bye,
Wolfgang

--
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss