Yo Eric! On Fri, 6 May 2016 15:28:40 -0400 "Eric S. Raymond" <e...@thyrsus.com> wrote:
> > I'm busy today, but I'll run some tests later to verify that is the
> > current behavior. At a minimum #2 makes it very hhard to see the
> > NMEA time and fix a good offset.
>
> Please do that.
On my short list.
> QNX is firmly out of scope. We'll handle it later if there is demand
> and resources backing the demand.
Fair enough.
> We *will* assume POSIX-compliant shared memory on our target systems.
QNX has POSIX compliant shared memory, just the new one, not the old one.
What about Windows?
> My intention is to officially deprecate refclocks 20 and 48 in favor
> of 28 (SHM), explaining that the way 1PPS and in-band information is
> mingled produces bad behavior on 1PPS dropouts. Actual deprecation
> will wait on confirmation from Gary's tests.
#48 does not have to work that way, it is just default configured that
way. If the #48 defaults are changed to sane one, and some testing, I
would say it is would then be preferred over #28.
For example, TAI to UTC offset is in the JSON stream (currently unused).
Adding TAI offset to SHM would be a major incompatible change.
And we can assume evvery stack has a TCP stack, so no compatibility
issues anywhere.
> The HOWTO will be rewritten to use a stripped gpsd-lite version
> feeding SHM.
Works for me, but maybe not PC...
> Thanks for bashing your way through this, Frank and Gary. You've
> clarified several murky issues.
And more to come... It also helps when someone acts on the knowledge.
RGDS
GARY
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Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
g...@rellim.com Tel:+1 541 382 8588
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