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Date: Fri, 30 Mar 2007 16:41:33 +0200
From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
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Subject: Re: [Adeos-main] Porting to Intel IXP425
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To: Richard Cochran <richard.cochran@domain.hid>
Cc: adeos-main@gna.org

Richard Cochran wrote:
>>The timer is aperiodic (most of the time) when running Xenomai, so
>>__ipipe_mach_set_dec is called for each timer tick and programs the
>>timer hardware for the next tick.
> 
> 
> Okay, so does that mean that I should implement a "one-shot" timer, or
> are we talking about resetting the periodic timer once in a while?
> 
> (BTW, in one-shot mode, the IXP425 timer does not do what the Developers
> Manual, part 252480-006, says that it does!)

Yes, the one shot mode is Xenomai default mode. The implementation of a
periodic timer over the one-shot timer is already done by the generic
ARM part of the Adeos patch.

> 
> 
>>__ipipe_mach_release_timer is called when Xenomai stops handling the
>>timer and let Linux handle it.
> 
> 
> But why does Xenomai do this? When unloading the module?

Yes, exactly.

-- 
                                                 Gilles Chanteperdrix