Re: Signal generation on parallel port
From: Norm Dresner (ndrez_at_att.net)
Date: 11/19/04
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Date: Fri, 19 Nov 2004 14:33:36 GMT
<HLHL> wrote in message
news:419ddcda$0$12900$afc38c87@news.optusnet.com.au...
> I want to create square wave signal on parallel port with prorammable
> frequency between 10-100Hz.
>
> Can one of the Linux guru guide me what is the best way of generation of
> squeare wave with highest possible frequency stability regardless of the
> process load on the computer?
You might look into Real-Time Linux.
http://www.fsmlabs.com/
If you hack around that site carefully, you'll find that there is a GNU
(free) version of RTLinux that is quite capable of creating heavy-duty,
industrial-strength applications. We've used it for almost 8 years to do
testing of avionics and find that we can trigger a periodic task with only a
few microseconds of jitter.
Norm
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