On 06/09/2016 08:37 PM, Gary E. Miller wrote:
Yo Mike!
On Thu, 9 Jun 2016 20:26:01 -0400
Mike <[email protected]> wrote:
Skytraq ships varying firmware, so that is not definitive.
Worse that says this:
"The 1PPS pin is multiplexed with some debug mode function whose
mode is to be determined at end of power on reset cycle. To avoid
incorrect function do not pull-up or pull- down this signal."
What could possibly go wrong there?
Okay, that looks really suspect to me. I'll try and get this thing
connected to a Windows box and see if their utility will show me any
useful info.
And the serial is connected directly to a RasPi?
Yes, it's directly connected to the Pi.
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?
Depends how good you are. I leave that to you.
Okay, a learning challenge!
No double pulse there. Looks good.
Hmm, it just occured to me, it is your SHM0 that is sending 2 updates
a second? Was it the SHM0? If so, that is not a problem, as long
as the time stamps look right, it just means the NMEA is reporting 2x
a second. The only thing we care about is the SHM1.
Yes, it was SHM0
I still need the debug output. Send me the result of this:
# gpsd -nND 9 /dev/ttyXX |# fgrep PPS > gpsd.log
Sent
Mike
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