[time-nuts] GPScon running on Raspberry Pi 3b
hmurray at megapathdsl.net
Mon Jun 26 18:07:03 EDT 2017
andrew.mileski at gmail.com said:
> Beware that USB-to-Serial converters are pretty horrible for precise timing
> applications, like PPS on the CD pin. It can be done on a GPIO pin instead,
> but requires some hacking and re-compiling.
What sort of hacking or re-compiling do you have in mind?
I didn't have any troubles getting PPS via GPIO. It's a bit of editing on
run-time config files. From my notes:
add new line: dtoverlay=pps-gpio,gpiopin=4
(The pin number depends on the GPS HAT.)
add new line: pps-gpio
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