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From: Captain Dondo <yan@NsOeSiPnAeMr.com>
Subject: Re: console out serial port
Date: Sun, 23 Oct 2005 20:18:45 -0700
References: <1130101118.646038.126640@g43g2000cwa.googlegroups.com> <giat23-4sh.ln1@news.it.uc3m.es> 

On Sun, 23 Oct 2005 23:05:52 +0200, Peter T. Breuer wrote:

> laclac01@yahoo.com wrote:
>> I have an embedded linux computer that spits the console out the only
>> serial port.
> 
> Embedded? Is that germane?

Quite possibly.  Embedded systems do weird things; on the one I'm working
with at the moment, console on serial is governed by jumper settings.  You
set the jumpers for console on one of two serial ports, or none.

> 
>> I want to be able to use the serial port for other IO. How
>> do i stop the the console to be outputted out the serial port?
> 
> You don't start it. It takes effort to move console output to the
> serial port - so if you don't make that effort, it won't happen.

Not necessarily on an embedded system.  No keyboard and no screen means
that console defaults to serial.

> I suggest you examine the way you are booting your kernel. You
> are probably providing some special kernel parameters that add the
> serial port as a console.  Well, stop doing that. The parameter may be
> something like
> 
>     console=ttyS0,38400
> 
> But it is possible that your kernel has been recompiled to do that
> natively. You alone know. 

Again, those things may come *hard wired* from the board manufacturer... 
And compiled into the kernel using custom patches, not easily 'fixed' or
'removed' without breaking other functionality.

To the OP:

You really should read the docs that came with your board, or query your
manufacturer.  Failing that, post on c.o.l.embedded.



 




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