[ntp:questions] More than one PPS source on Raspberry Pi?

Frank Wayne fwayne at frankwayne.com
Mon Jan 8 15:37:37 UTC 2018


Thank you. I have not had time to revisit this lately and now school has started again, but I will try it as soon as I have the chance.

If you work at Schloss Laxenburg, I am very jealous. :)
________________________________________
From: MAYER Hans [Hans.Mayer at iiasa.ac.at]
Sent: Tuesday, January 02, 2018 05:45
To: Frank Wayne; questions at lists.ntp.org
Subject: RE: More than one PPS source on Raspberry Pi?

Hi Frank,

Sorry for late answer.
Yes, I compiled a driver to use it twice.
Here a link of my rubidium stratum-1 project http://blog.mayer.tv/2017/06/11/stratum-0-server.html
Inside there are several links. One is for a second driver which you can find here: https://github.com/hans-mayer/pps2gpio

Kind regards
Hans




-----Original Message-----
From: questions [mailto:questions-bounces+hans.mayer=iiasa.ac.at at lists.ntp.org] On Behalf Of Frank Wayne
Sent: Monday, December 4, 2017 5:35 PM
To: questions at lists.ntp.org
Subject: [ntp:questions] More than one PPS source on Raspberry Pi?

Has anyone tried to use more than one PPS source at the same time on a Raspberry Pi? The device tree overlay pps-gpio does not seem to support more than one instance. That is, if my config.txt specifies two instances of pps-gpio for different GPIO pins, only /dev/pps0 is created.

The documentation for pps_gpio is limited or missing, and the Raspberry Pi forum and the LinuxPPS list have not helped.

If pps-gpio cannot do it, is there another way to get PPS devices for Raspbian or another OS that will run on a Pi?

Frank Wayne
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