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Re: [gpsd-users] SemPiTernal - Bounding PPS uncertainty
From: |
Eric S. Raymond |
Subject: |
Re: [gpsd-users] SemPiTernal - Bounding PPS uncertainty |
Date: |
Fri, 22 Apr 2016 08:10:44 -0400 |
User-agent: |
Mutt/1.5.23 (2014-03-12) |
David J Taylor <address@hidden>:
> From: Eric S. Raymond
>
> We need the same information for the Uputronics HAT.
> ================================
>
> The Uputronics delivers a 100 ms positive pulse with the leading edge at the
> second boundary. It's correctly detected by the stock distribution of
> Raspbian Wheezy and Jessie. There is no detection of the trailing edge.
>
> sudo ppstest /dev/pps0 =>
>
> trying PPS source "/dev/pps0"
> found PPS source "/dev/pps0"
> ok, found 1 source(s), now start fetching data...
> source 0 - assert 1418933982.9980424, sequence: 970 - clear 0.0000000,
> sequence: 0
> source 0 - assert 1418933983.9980454, sequence: 971 - clear 0.0000000,
> sequence: 0
>
> This was shortly after booting.
Thanks, that's useful.
--
<a href="http://www.catb.org/~esr/">Eric S. Raymond</a>
Re: [gpsd-users] SemPiTernal - Bounding PPS uncertainty, David J Taylor, 2016/04/22
- Re: [gpsd-users] SemPiTernal - Bounding PPS uncertainty,
Eric S. Raymond <=
Re: [gpsd-users] SemPiTernal - Bounding PPS uncertainty, Anthony Stirk, 2016/04/23
Re: [gpsd-users] SemPiTernal - Bounding PPS uncertainty, Chen Wei, 2016/04/23