[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [gpsd-dev] Minimum working example for libgps

From: Gary E. Miller
Subject: Re: [gpsd-dev] Minimum working example for libgps
Date: Sat, 4 Nov 2017 13:01:29 -0700

Yo David!

On Sat, 4 Nov 2017 15:13:31 +0800
David Huichen Dai <address@hidden> wrote:

> Thanks for your reply. Why do you say that my sensor reports at
> 1-second interval? I set the gps_waiting time to 2 seconds, which
> means I wait for up to 2 seconds to get the coordinates, not sampling
> every 2 seconds, right?

gps_waiting is client side.  But your GPS just sends data when it wants to,
usualy PVT once a second, and gpsd passes it on when it sees it.  Thus you
should get PVT once a second.

> Do I need a separate thread to sample the coordinates, store them in a
> variable, and access it from other thread when I need the
> coordinates? Is this the common way to use the libgps?

Nah, the OS buffers the socket for you.  Just poll the gpsd interface in
you main loop.

Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
        address@hidden  Tel:+1 541 382 8588

            Veritas liberabit vos. -- Quid est veritas?
    "If you can’t measure it, you can’t improve it." - Lord Kelvin

Attachment: pgpbQS4vGC9Qx.pgp
Description: OpenPGP digital signature

reply via email to

[Prev in Thread] Current Thread [Next in Thread]