Re: kernel function called with 200Hz

From: Rich Walker (rw_at_shadow.org.uk)
Date: 05/18/05 

Date: Wed, 18 May 2005 14:26:42 +0100

Klaus Schneider <klaus.schneider@iup.uni-heidelberg.de.x> writes:

> I do not need higher resolution than microseconds (at 200Hz, one "tick" is
> 5ms, which is fairy above 1us), but I found on some kernel developer page
> that usleep() does not wait *exactly* the specified time but it is at
> minimum this value; that's why I thought it would not be exact enough. But,
> as 200Hz is not that much for nowadays computers, perhaps I could just give
> it a try and check the signal with an osziloscope.

You should *try* RTAI for your problem. We have found it to be extremely
robust in practice - like, crash Linux and have the hard-real-time RTAI
tasks carry on as the machine falls down around your ears...

cheers, Rich/ 

-- 
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