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<== Date ==> <== Thread ==>

Subject: Re: Datum (Bancomm) GPS glitches
From: Andrew Johnson <anj@aps.anl.gov>
Cc: "'Bill Cruise'" <cruise@cfht.hawaii.edu>, tech-talk@aps.anl.gov
Date: Tue, 29 Jul 2003 10:18:41 -0500
Dirk Zimoch wrote:

if you don't have such a controller bit, you must do the following: * read the slow register * read the fast register * read the slow register again * repeat if slow register has changed

If my memory of the board is correct, the Bancomm time registers can be read in one particular order to latch the input time. This is documented in the user manual - I can't recall what the correct order is though. I would also suggest you try to get hold of a copy of the driver that Gemini and/or JCMT use, it should provide all of the facilities that you might need, links into the EPICS timestamp driver and doesn't suffer from the rollover problem.


- Andrew
--
There are 10 types of people in the world:
Those who understand binary, and those who don't.


References:
RE: Datum (Bancomm) GPS glitches Jeff Hill
Re: Datum (Bancomm) GPS glitches Dirk Zimoch

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