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Re: [gpsd-dev] Field reports from Raspberry Pi GPS HAT users?
From: |
Eric S. Raymond |
Subject: |
Re: [gpsd-dev] Field reports from Raspberry Pi GPS HAT users? |
Date: |
Mon, 18 Apr 2016 21:26:45 -0400 |
User-agent: |
Mutt/1.5.23 (2014-03-12) |
Hal Murray <address@hidden>:
> I haven't had any troubles with GPS Hat on Pi 2. I use ntpsec direct rather
> than with gpsd.
I may do likewise. Depends on which path seems like it'll make getting PPS
easier.
> address@hidden said:
> > It's after working around those problems that the real bad stuff starts.
> > Running "cat /dev/ttyS0" to look at the raw NMEA data yields baud barf,
> > unless you catch it in the first few seconds after reboot in which case you
> > get a few sentences of NMEA and then baud barf.
>
> You might try lsof to see if anybody else has it open.
Good plan, I'll try it.
> It wouldn't surprise me if the kernel handler for ttyS0 isn't fully debugged
> yet. I wonder why they changed from ttyAMA0 to ttyS0.
Search me. That was just a guess on my part; it's not documented.
--
<a href="http://www.catb.org/~esr/">Eric S. Raymond</a>