[time-nuts] Re: Can Anyone Help Me Get PPS Into This Mini PC?

[Poul-Henning Kamp]

Most of these Mini-PC's are produced by chinese factories based on
Intels reference designs, and to call them "underdocumented" is
an understatement of the year.

I have yet to see any of them, where the GPIO pins can generate an
interrupt, so your PPS precision will be limited to the poll-rate,
and since the GPIO pins are usually on the LPC bus polling will be
slooooow, which means eating up a lot of CPU and power.

Your best bet is probably the COM port, which can generate interrupts
when the DCD signal changes.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
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FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.