On 05/23/2010 06:19 PM, Everett Wang wrote:
> On Sun, May 23, 2010 at 11:46 PM, Wolfgang Grandegger <[email protected]> 
> wrote:

>> There are other possibilities to interact with Linux, e.g. telnet,
>> slogin or netcat. But it's always good to have a console.
>>
> I guess I need a USB to ethernet for these.

Yes.

...
>> All three uarts are occupied by Linux and you cannot use them as
>> rtserial. First you need to release at least one of them. What Linux
>> config do you use for your board?
> 
> I didn't do any configuration. Do you mean to config these during kernel
> configuration?

Can you show us the .config of your kernel?

Some more insights:

I think the serial ports for the beagle boards are configured in:

http://lxr.linux.no/#linux+v2.6.34/arch/arm/mach-omap2/serial.c

Therein you find entries like:

http://lxr.linux.no/#linux+v2.6.34/arch/arm/mach-omap2/serial.c#L82

As you can see, a regshift of 2 is used, which is not yet supported by
the 16550A RTDM driver. Should not be a big deal to add it, though.
Also, as "baud_base" you should use OMAP24XX_BASE_BAUD.

Wolfgang.

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