Re: Datum (Bancomm) GPS glitches

[Andrew Johnson <anj@aps.anl.gov>]

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.