Re: [gpsd-dev] gpsd-dev Digest, Vol 94, Issue 13

[Sharmila]

Hi Gary,

I have 2 queries:

1. About 3.19 porting issue

When I ported libgpsd to 3.19 Version , I am not able to receive any of the data . Whether do we need to enable anything. I tried stand alone compilation of the source code for my platform (ARM64) using scons command , but I am getting ncurses issue. How to solve this ?

2.  About Buffer issue

>>Look at dynModel in UBX-CFG-NAV5.

    I am getting dynModel as 0 that is it is in portable model. Do I have to change for better performance. End requirement of the device is in automotive project.

>>What sort of lag do you think you see?

    If I run my device for 40 min , I am getting lag of 5 min. If I increase the running time the lag is increasing.

>>What update rate?  1Hz, 10Hz, 20Hz?

    I am not sure about this, but I haven't changed anything about update rate in libgpsd.

Please provide your input on above queries.

Thanks & Regards,

Sharmila

On Tuesday 09 July 2019 09:30 PM, address@hidden wrote:

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Today's Topics:

   1. Re: gpsd-dev Digest, Vol 94, Issue 10 (Gary E. Miller)
   2. Re: gpsd-dev Digest, Vol 94, Issue 10 (Gary E. Miller)


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Message: 1
Date: Mon, 8 Jul 2019 12:07:39 -0700
From: "Gary E. Miller" <address@hidden>
To: address@hidden
Subject: Re: [gpsd-dev] gpsd-dev Digest, Vol 94, Issue 10
Message-ID: <address@hidden>
Content-Type: text/plain; charset="utf-8"

Yo Sharmila!

On Mon, 8 Jul 2019 20:10:13 +0530
Sharmila <address@hidden> wrote:

I am planning to migrate my changes in latest version of gpsd -
V3.19.

Nice.

Can you please give me the required files to integrate in
yocto layer( yocto patch files and .bb files ) for supporting 3.19.

You gotta talk to the yocto people about their patches.  They never
have upstreamed anything to gpsd.

Last time I looked at the yocto patches they were pretty trivial.

RGDS
GARY
---------------------------------------------------------------------------
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
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Message: 2
Date: Mon, 8 Jul 2019 12:24:19 -0700
From: "Gary E. Miller" <address@hidden>
To: address@hidden
Subject: Re: [gpsd-dev] gpsd-dev Digest, Vol 94, Issue 10
Message-ID: <address@hidden>
Content-Type: text/plain; charset="utf-8"

Yo Sharmila!

On Mon, 8 Jul 2019 13:04:17 +0530
Sharmila <address@hidden> wrote:

I am facing one more issue. When I am using the device at stationary 
point I am able to get the proper fix, but when the device is moving
the fix is lagging we are getting the value of different co-ordinate.

I'm guessing you neglected to change the model to your need?

Look at dynModel in UBX-CFG-NAV5.

What do you count as "moving"?  A bicycle, a car, an airplane, a
rocket?

What sort of lag do you think you see?

What update rate?  1Hz, 10Hz, 20Hz?

What sort of error?

We suspect that the values are buffering somewhere. Could you please 
comment on this. Whether you are buffering the data anywhere?

Buffers all over.  I need an idea of what you think you see and what you
think you need.

RGDS
GARY
---------------------------------------------------------------------------
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
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