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GPIO PPS
#1
I would like to setup NTPD with GPIO PPS.  
Is there  PPS GPIO in the GPIO driver? on which pin?
RPI has it built in its GPIO driver.

Is any one working on this?

dk23
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#2
(09-05-2017, 01:17 AM)dk23 Wrote: I would like to setup NTPD with GPIO PPS.  
Is there  PPS GPIO in the GPIO driver? on which pin?
RPI has it built in its GPIO driver.

Is any one working on this?

dk23

Hi dk23, 
you can try this patch and rebuild image. It's work for me!
by the way I use pin22 for pps.


Attached Files
.gz   support_pps.diff.gz (Size: 475 bytes / Downloads: 31)
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#3
I would like to have a second PPS which GPIO should I use?
Setting up a standalone NTPD (no outside connection) 
and want to use PPS from two GPSs

FYI using NTPsec (NTPsec.org) with refclock shm and the results are very good.

Thanks
df23
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#4
Ennice,
thank you for the patch!

It seems I've managed to bring up the PPS driver successfully!
/dev/pps0 is in charge, and the corresponding
interrupts are counting on SoC#17 pin - Geeeeeee!
(I've just compiled the .next armbian stuff for Tinkerboard, and added you mods...)

ThanX!

Gyorgy
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