Interference between SCC serial and ethernet

Interference between SCC serial and ethernet

[Brown, David (dbrown03)]

I have the MontaVista 2.2.13 kernel running on my board.
SCC1 for Ethernet; SMC1, SMC2, SCC2 & SCC3 as serial ports.

The SCC serial ports work fine for me, until I use Ethernet. Then, the SCC
serial ports don't work anymore but Ethernet does. The SMC serial ports
continue to work.

I'll be debugging this tomorrow in detail, but I first want to know whether
I should be looking for uart.c/enet.c bugs or limit myself to configuration
issues.  Has anyone used SCC serial ports and SCC Ethernet simultaneously?
If so, I'll concentrate on the config issues.

Thanks, all!

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Re: Interference between SCC serial and ethernet

[Dan Malek]

"Brown, David (dbrown03)" wrote:
>
> I have the MontaVista 2.2.13 kernel running on my board.

I need a little help here :-).....I assume it is a 860 class processor,
but what about the board?  There are implementation specific considerations
for the I/O port configurations.  You didn't happen to use some of
the I/O ports for Ethernet control that multiplex to the others?

> The SCC serial ports work fine for me, until I use Ethernet.

How do you boot the system not using Ethernet, then enable it?  Do
you mean running to different kernel configurations?


> ... Has anyone used SCC serial ports and SCC Ethernet simultaneously?

Yes, even multiple Ethernet and multiple SCCs.



	-- Dan

** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/

RE: Interference between SCC serial and ethernet

[Brown, David (dbrown03)]

Okay, since SCC serial and ethernet are known to work simultaneously, I'll
be looking for problems in my board configuration or in the board itself.
We have used the board for a few years, the Ethernet portion is being
exercised for the first time by me.

I'm not expecting help on this .. it's the kind of problem that's hard to
diagnose/debug over a mailing list.  I boot up with root=/dev/ram ip=...,
and Ethernet gets setup and enabled at boot.  Then I use the SCC serial
ports, and they work fine.  Then I ping the board over Ethernet, and the SCC
serial ports don't work anymore.

If I do find software problems in the kernel, I'll certainly report them,
but I'm now expecting to find something wrong with the board or something
wrong with my configuration.
--
Dave Brown <dbrown03@harris.com>

-----Original Message-----
From: Dan Malek [mailto:dan@netx4.com]
Sent: Tuesday, May 02, 2000 6:09 PM
To: Brown, David (dbrown03)
Cc: linuxppc-embedded@lists.linuxppc.org
Subject: Re: Interference between SCC serial and ethernet


"Brown, David (dbrown03)" wrote:
>
> I have the MontaVista 2.2.13 kernel running on my board.

I need a little help here :-).....I assume it is a 860 class processor,
but what about the board?  There are implementation specific considerations
for the I/O port configurations.  You didn't happen to use some of
the I/O ports for Ethernet control that multiplex to the others?

> The SCC serial ports work fine for me, until I use Ethernet.

How do you boot the system not using Ethernet, then enable it?  Do
you mean running to different kernel configurations?


> ... Has anyone used SCC serial ports and SCC Ethernet simultaneously?

Yes, even multiple Ethernet and multiple SCCs.



	-- Dan

** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/