linux-kernel - Re: [LinuxPPS] [PATCH 4/5] pps: add parallel port PPS signal generator

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Message-ID: <20100206115743.7cd6f34d@lvk.cs.msu.su>
Date:	Sat, 6 Feb 2010 11:57:43 +0300
From:	Alexander Gordeev <lasaine@....cs.msu.su>
To:	Rodolfo Giometti <giometti@...eenne.com>
Cc:	LinuxPPS List <linuxpps@...enneenne.com>,
	linux-kernel@...r.kernel.org,
	"Nikita V\. Youshchenko" <yoush@...msu.su>, stas@....cs.msu.su
Subject: Re: [LinuxPPS] [PATCH 4/5] pps: add parallel port PPS signal
 generator

Hi Rodolfo,

I've accidentally found your email in the archives of linuxpps list.
Very strange that it didn't come to me directly because I was
subscribed...

В Fri, 5 Feb 2010 11:39:14 +0100
giometti at enneenne.com (Rodolfo Giometti) пишет:

> On Wed, Feb 03, 2010 at 11:56:50PM +0300, Alexander Gordeev wrote:
> > Add PPS signal generator which utilizes STROBE pin of a parallel
> > port to send PPS signals. It uses parport abstraction layer and
> > hrtimers to precisely control the signal.
> 
> What this generators are used for?

This generator sends PPS signals over a parallel port from one computer
to another. So it's just doing what every PPS-capable GPS device does.
I use it to precisely synchronize time on several computers for
distributed real-time simulation. It has very strict timing conditions.

-- 
  Alexander

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