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

Chris Caudle chris at chriscaudle.org
Mon May 21 14:55:23 EDT 2018


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.

-- 
Chris Caudle





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