[time-nuts] inexpensive, black box, GPS or NTP based TTL time capture?

jimlux jimlux at earthlink.net
Wed Oct 25 08:52:54 EDT 2017


On 10/24/17 11:27 PM, Michael Wouters wrote:
> Hello Jim
> 
> We are using BeagleBone Black + GPS 1 pps etc in our time-transfer system
> 
> You can see the overlays in
> https://github.com/openttp/openttp/tree/develop/software/system/device-tree-overlays
> 
> Best regards
> Michael
> 

Tnx, I think my signal is coming through ok - if I look at 
/sys/class/gpio/gpio66, I can see the value changing when I connect the 
pin to +3 or 0V.
It's just not getting to the pps kernel driver -
No "assert" timestamp from /sys/class/pps/pps0/assert  (or ppstest)



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