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To: Barry Bouwsma <freebsd-misuser@remove-NOSPAM-to-reply.NOSPAM.dyndns.dk>
From: "Poul-Henning Kamp" <phk@phk.freebsd.dk>
In-Reply-To: Your message of "Mon, 02 Aug 2004 15:16:42 +0200."
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Date: Tue, 03 Aug 2004 16:53:57 +0200
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cc: FreeBSD Current <current@freebsd.org>
Subject: Re: [HEADSUP] retire TIOCDCDTIMESTAMP 
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In message <200408021316.i72DGfO86307@Mail.NOSPAM.DynDNS.dK>, Barry Bouwsma writes:

>Basically, my TIOC*TIMESTAMP hacks allowed me to gather timestamps
>from the four status lines, to be used by programs that could
>handle four sources of PPS data on a single port.  I'd like to
>be able to do that with PPS-API as well, if possible.

I tried to get multi-signal handling into the PPS-API and my failure
in that was a large part of the reason why I asked to not be listed
as an author of the RFC.

On the other hand, if you have very special needs, which I think
timestamping four signals with one serial port is, I would advocate
rolling your own.

You may want to look at the dev/ppbus/pps.c driver for inspiration.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.