[time-nuts] NEO-M8N vs. NEO-M8T

Gary E. Miller gem at rellim.com
Mon May 21 15:23:10 EDT 2018


Yo Chris!

On Mon, 21 May 2018 13:55:23 -0500
"Chris Caudle" <chris at chriscaudle.org> wrote:

> On Mon, May 21, 2018 1:52 pm, Chris Caudle wrote:
> > On Mon, May 21, 2018 1:19 pm, Gary E. Miller wrote:  
> >> Now, how to I tell the Linux kernel to apply that correction?  
> >
> > Have the PPS driver accept the correction before logging the PPS
> > timestamp.  
> 
> Or just have the PPS driver log the raw timestamp, then have the PLL
> engine in ntpd incorporate the corrections into the math of the
> control loop.  Presumably ntpd will be getting the information passed
> in from gpsd, so the clock control daemon should have the correction
> information in plenty of time before the next PPS pulse gets logged.

I look forward to your patch!

RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
	gem at rellim.com  Tel:+1 541 382 8588

	    Veritas liberabit vos. -- Quid est veritas?
    "If you can’t measure it, you can’t improve it." - Lord Kelvin
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