Additional pps-gpio
Gary E. Miller
gem at rellim.com
Tue Jan 23 21:58:40 UTC 2018
Yo Achim!
> > Agai, the problem
> > is not using multiple such devices, it's with actually getting them
> > configured in the kernel.
>
> How about this on a RasPi:
>
> # Uptraonics on gpio 18
> dtoverlay=pps-gpio,gpiopin=18
> # adafruit HAT
> dtoverlay=pps-gpio,gpiopin=4
Ah, now I see the problem on the RasPi.
These work, when you use just one or the other:
# Uputronics on gpio 18
dtoverlay=pps-gpio,gpiopin=18
# adafruit HAT on gpio 4
dtoverlay=pps-gpio,gpiopin=4
But put use both and you still on get one /dev/ppsX
Also, you would expect this to work, but it also jsut give you one
/dev/ppsX:
dtoverlay=pps-gpio,gpiopin=18,4
So the problem is with the RasPi kernel. Go ahead and nag them for us.
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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