ttyS1 on an MVME5100

ttyS1 on an MVME5100

[Ton van den Broek]

Hi everybody

does somebody ever uses the second serial channel on a Motorola MVME5100?
Are there any known problems?
When I want to write() a string  the CPU-activity LED burns green, and nothing
else happens. The whole Linux stops responding, probably because it is
polling some bit(s) in kernel-space.
When I open ttyS0 I see my string appearing on the debug-channel, no problems
there.
I'm using Linux version 2.4.7-timesys-3.1.246 from Timesys. Since this is a
free download there is no support from them.

Thanks for any feedback
Ton van den Broek
Software engineer
Leica Microsystems Lithography
Best, NL.


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Re: ttyS1 on an MVME5100

[ghannon]

> does somebody ever uses the second serial channel on a Motorola MVME5100?

Do you mean the second channel on-board, or one of the serial ports that
are available using the IPMC-761?
I set console=ttyS1, and the result was similar to what you saw, the
board locked up.  I don't recall if I let it reboot (ie was it a panic or
a lock-up.)
I also tried just echoing some text to ttyS1 and it locked up as well.

> I'm using Linux version 2.4.7-timesys-3.1.246 from Timesys. Since this is
a
> free download there is no support from them.

I also tried using the ports available on the IPMC and got no where.
They don't seem to be recognized, unless I left out some kernel option.
I'm using the 2.4.23 kernel from the linuxppc_2_4_devel tree.

Please let me know if you find a solution to this.

G. Hannon


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