From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
To: Richard Cochran <richard.cochran@domain.hid>
Cc: adeos-main@gna.org, xenomai@xenomai.org
Subject: Re: [Xenomai-core] [Adeos-main] [PATCH] Adeos support for IXP4xx
Date: Wed, 18 Apr 2007 09:45:19 +0200 [thread overview]
Message-ID: <17957.52367.369723.380241@domain.hid> (raw)
In-Reply-To: <899865CA54E4444DAF2E3639C04C5F4805EC79@domain.hid>
Richard Cochran wrote:
> > -----Original Message----- From: Gilles Chanteperdrix
> >> *IXP4XX_OSRT1 = LATCH | ONE_SHOT_ENABLE;
> >
> > In fact, should not this be:
> >
> > *IXP4XX_OSRT1 =
> > (last_jiffy_time + LATCH - *IXP4XX_OSTS) |
> ONE_SHOT_ENABLE;
>
> Nope, we are using GP Timer 1. It counts down from the dialed value and
> then stops. It is _not_ a free running timer.
I understand, but my point is that if we want the next timer interrupt
to occur at last_jiffy_time + LATCH, we should reprogram the decrementer
with last_jiffy_time + LATCH - *IXP4XX_OSTS to account for the time
which passed since last_jiffy_time.
--
Gilles Chanteperdrix.
next prev parent reply other threads:[~2007-04-18 7:45 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-17 6:02 [Xenomai-core] [PATCH] Adeos support for IXP4xx Richard Cochran
2007-04-17 17:48 ` [Xenomai-core] [Adeos-main] " Gilles Chanteperdrix
2007-04-17 17:58 ` Gilles Chanteperdrix
2007-04-18 5:58 ` Richard Cochran
2007-04-18 7:45 ` Gilles Chanteperdrix [this message]
2007-04-18 5:21 ` Richard Cochran
2007-04-18 7:53 ` Gilles Chanteperdrix
2007-04-18 9:19 ` Richard Cochran
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