Yo Frank! On Thu, 5 May 2016 19:54:33 -0400 Frank Nicholas <fr...@nicholasfamilycentral.com> wrote:
> Regarding the GPIO & edge detection issue in section:
> == Edge-detection issues and new HATs ==
>
> Do we know if that issue still persists in the current kernel? I
> thought I saw some post explaining how to check for it, but can’t
> seem to find it now...
Yes, the patch has not been accepted by LKML, no distros add it.
Simple to see:
root@pi2:~# ppstest /dev/pps0
trying PPS source "/dev/pps0"
found PPS source "/dev/pps0"
ok, found 1 source(s), now start fetching data...
source 0 - assert 1462492791.999966543, sequence: 147766 - clear 0.000000000,
sequence: 0
source 0 - assert 1462492792.999970614, sequence: 147767 - clear 0.000000000,
sequence: 0
^C
No clear edge is every detected, but the assert ticks away.
Also note my pi2 has ntpd peers, so I know the assert it right on the money:
root@pi2:~# ntpq -p
remote refid st t when poll reach delay offset jitter
==============================================================================
-SHM(0) .GPS. 0 l 2 64 377 0.000 -115.17 87.356
*SHM(1) .SHM. 0 l 1 64 377 0.000 0.028 0.008
+catbert.rellim. .SHM. 1 s 20 64 377 0.369 0.407 0.070
+spidey.rellim.c .GPS1. 1 s 38 64 376 0.355 0.025 0.021
-kong.rellim.com .SHM1. 1 s 64 64 377 0.313 -9.145 1.668
-backup.rellim.c 204.17.205.8 2 s 61 64 377 0.423 0.071 3.575
8 microSec jitter on PPS, 0.025 milliSec offset from my main GPS PPS server
(spidey).
RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
g...@rellim.com Tel:+1 541 382 8588
pgpr4du4Tmcku.pgp
Description: OpenPGP digital signature
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