topic Re: Serial Port Parameter in Operating System - HP-UX

Serial Port Parameter

Oleg_23 — Wed, 11 Sep 2002 10:21:22 GMT

Hi.
Sorry for my English.

I have HP9000 server L-series, HP-UX 11i.
Server has IO-Core card with 3 serial ports (remote, console, power).

How can I change speed for a serial port, e.g. /dev/tty0p0?
By default, speed is 300 baud:

$ stty < /dev/tty0p0
speed 300 baud; ...

I try -

$ stty 9600 < /dev/tty0p0

but speed did not change.

If I change speed in GSP, anyway nothing happened.

Thank you in advance.

Re: Serial Port Parameter

Dietmar Konermann — Wed, 11 Sep 2002 10:25:49 GMT

Hi!

Your stty command is perfectly correct. But the configuration is reset to its defaults when the device is closed. You need to keep it open while you need to use it.

From a posix-sh script e.g.:

(
stty 9600
echo "hallo"
read answer
...
) < /dev/tty0p0 >/dev/tty0p0

Regards...
Dietmar.

Re: Serial Port Parameter

Rainer von Bongartz — Wed, 11 Sep 2002 10:28:19 GMT

OR

sleep 9999999999> > /dev/tty0p0&

stty 9600 < /dev/tty0p0

Regards
Rainer

Re: Serial Port Parameter

harry d brown jr — Wed, 11 Sep 2002 11:25:24 GMT

Oleg,

If that's poor english, I can't imagine what correct english is!

Maybe it was those cryptic commands, like:

stty

:-)