[FSO/SHR] ogpsd/fso-gpsd: can't get 4Hz sample rate

Ed Kapitein ed at kapitein.org
Fri May 15 11:02:14 CEST 2009

Vasco Névoa wrote:
> Citando Helge Hafting <helge.hafting at hist.no>:
>> Ouch.
>> Having the framework _managing_ the gps (turn on/off, configure,...) is
>> fine. But why regenerate the data, what is wrong with pass-through?  The
>> more cpu work, the more delays. And the gps may very well be used for
>> real-time purposes. And of course, 100% of the cpu is not available, so
>> it is hard to know how much extra work is "too much".
>>> You could try uninstalling fso-gpsd, installing "normal" gpsd and
>>> somehow persuading frameworkd to not touch the gps (don't konw if
>>> setting the GPS to off is enough...)
>> And the ideal fix would be framework support, so you just tell it you
>> want 4HZ updates and from then on you get that.
> Helge, you're quite right, but gpspipe is a legacy application, and  
> the preferred way is to sit on the DBUS interface for signals.
> I'm just using gpspipe because I already had a nice script to import  
> data in NMEA format. ;)
> I suppose the FSO people will "strongly suggest" that users stick to  
> the DBUS instead of consuming NMEA text, and that's what makes sense  
> (even according to your own optimization rationale). So, asap, I'm  
> going to code my app in python to use DBUS and avoid all this NMEA  
> nonsense from the start.
> But the problem remains: ogpsd does not accept more than one position  
> change per second.... and so I opened the ticket.
> http://trac.freesmartphone.org/ticket/431
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Does anyone know a program/script that converts the dbus messages to gpx
Now i us gpspipe to get nmea and gpsbabel to create gpx files.

Kind regards,

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