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From: | Mike |
Subject: | Re: [gpsd-dev] refclock 28 gone wacky on me |
Date: | Thu, 9 Jun 2016 20:26:01 -0400 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.1.1 |
On 06/09/2016 07:08 PM, Gary E. Miller wrote:
Yo Mike! On Thu, 9 Jun 2016 18:21:32 -0400 Mike <address@hidden> wrote:Forgot this in the original post... ntpshmmon version 1 # Name Seen@ Clock Real L Prec sample NTP0 1465510765.147894340 1465510765.120560175 1465510764.938999891 0 -1 sample NTP0 1465510765.648664035 1465510765.468806532 1465510764.938999891 0 -1Is seeing NTP0 twice like this typical?Nope, should be impossible. Looks to be exactly 500 milliSec apart. Do you have a square wave output? Or a 2Hz output? How about you put ppstest on it to see. Except on the Pi you only see one edge, so can not tell square wave from 2 Hz. Got a scope? What is the GPS again?
GPS module is a ST22, SkyTraq Venus 6 chipset. http://www.perthold.de/BINARY/gps-st22.pdf Datasheet is here. It's an oddball corner case I'm sure... No scope easily available right now.If I hook it up to a PC, or with a serial to USB adapter will I be able to see more about the edge being seen?
address@hidden:~ $ sudo 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 1465518012.001419932, sequence: 12052 - clear 0.000000000, sequence: 0 source 0 - assert 1465518013.001419316, sequence: 12053 - clear 0.000000000, sequence: 0 source 0 - assert 1465518014.001418700, sequence: 12054 - clear 0.000000000, sequence: 0 source 0 - assert 1465518015.001418086, sequence: 12055 - clear 0.000000000, sequence: 0 source 0 - assert 1465518016.001416472, sequence: 12056 - clear 0.000000000, sequence: 0 source 0 - assert 1465518017.001417858, sequence: 12057 - clear 0.000000000, sequence: 0
Mike
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