Re: [gpsd-dev] [gpsd-users] 1PPS on the Pi - let's pool our knowledge.

[Gary E. Miller]

Yo Hal!

On Tue, 19 Apr 2016 12:04:48 -0700
Hal Murray <address@hidden> wrote:

> address@hidden said:
> > You missed the part about the kernel patch needed to see both edges
> > of the PPS.  You have a 50/50 chance you can't see the right edge,
> > and no good way of knowing you have the right edge.   
> 
> That would be true in the general case, but we are interested in a
> specific device or a small set of devices so we only need to test
> them and document that they work.  (and/or what offset is needed)

Well, we already have RasPi, RasPi2, RasPi3, mixed with wheezy/jessie, mixed
with AdaFruit or Upuptronics HATs.  That is already a lot of permutations.

Once that is done people will show up with GPS that are not in HAT form.
So I'd lean toward specific step-by-step with enough general info
so people can untangle odd variants.

RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
        address@hidden  Tel:+1 541 382 8588

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