TangoGPS and GPSD

Marcus Bauer marcus.bauer at gmail.com
Sun Jul 6 18:16:07 CEST 2008


On Sun, 2008-07-06 at 17:52 +0200, Bernhard Höll wrote:

> Interestingly the /etc/init.d/gpsd startscript does not get triggered when selecting
> "Turn on GPS" in the power menu. 
> Does anyone know what action gets invoked upon selecting "Turn on GPS" ?
> Is this for activating/deactivating the physical device or is the /etc/init.d/gps-hardware
> start script (dummy file) being invoked?

"Turn on GPS" is necessary in order to power up the chip.

  cat /sys/bus/platform/devices/neo1973-pm-gps.0/pwron

should afterwards be "1".

Marcus


> 
> Thanks..
> 
> Bernhard
> > Does the gpsd have the right device in /etc/defaults/gpsd?
> > 
> > It is /dev/tty/SAC0 thus:
> > GPS_DEV="/dev/ttySAC1"
> > 
> > To test the gpsd you can do from your desktop:
> > 
> > nc 192.168.0.202 2947
> > 
> > then type 'r' and hit enter.
> > 
> > Looks like this then:
> > 
> > ~$ nc 192.168.0.202 2947
> > r
> > GPSD,R=1
> > $GPTXT,01,01,01,PSRF inv format*2B
> > $GPTXT,01,01,01,PGRM inv format*34
> > $GPTXT,01,01,01,PFEC inv format*2C
> > $GPRMC,,V,,,,,,,,,,N*53
> > $GPVTG,,,,,,,,,N*30
> > $GPGGA,,,,,,0,00,99.99,,,,,,*48
> > $GPGSA,A,1,,,,,,,,,,,,,99.99,99.99,99.99*30
> > $GPGSV,1,1,00*79
> > $GPGLL,,,,,,V,N*64
> > $GPZDA,,,,,00,00*48
> > 
> > 
> > gpsd uses 8-10% CPU here.
> > 
> > 
> > 
> > On Sun, 2008-07-06 at 13:19 +0200, Bernhard Hoell wrote:
> > > Hello,
> > > 
> > > I failed to get GPS working on my freerunner. I flashed the latest  
> > > openmoko-devel-image-om-gta02.jffs2  and matching kernel. I installed  
> > > tangogps as well as gpsd manually with opkg and I configured tangogps  
> > > to connect to the gpsd, which should have been running (since a  
> > > portscan of my freerunner showed port 2947 as open).
> > > I kept it running for several hours, but tangogps did not report GPS  
> > > information. GPSD however used about 50 to 70 % of processor power.
> > > I read through the mailing lists and checked the tangogps documents.
> > > 
> > > It seems to me that I am missing something here. Can somebody point me  
> > > to a more detailed documentation or give advice?
> > > 
> > > Thanks
> > > 
> > > 
> > > Bernhard
> > > 
> > 
> 
> 




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