Re: [gpsd-dev] Clarifications needed for the time-service HOWTO

[Gary E. Miller]

Yo Hal!

On Sat, 19 Oct 2013 21:16:49 -0700
Hal Murray <address@hidden> wrote:

> What do you mean by "KPPS"?

I use KPPS as shorthand for RFC 2783.  

> RFC-whatever has two parts.  One is to just grab the time stamp when
> the modem control signal changes, and the API to read it.  The other
> is to push the whole timekeeping phase locked loop into the kernel.
> Linux doesn't implement the second part.

Uh, no.  I suggest you read RFC 2783 again.  It just says what you define
as part one.  And Linux supports all the mandatory parts.

> On Linux, things like
>   cat /sys/class/pps/pps0/assert
> will give you things like:
>   1382242063.999995003#2900635
> The stuff after the # is a counter.  The stuff before it is a
> timestamp. Looks like this box is off by 5 microseconds.

That is not RFC 2783, that is linux specific.  gpsd does NOT use that
at this time.

RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97701
        address@hidden  Tel:+1(541)382-8588

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