[USRP-users] gps_gpgga and gps_gprmc sensors missing in E310, how to get GPS position in E310?

Moritz Fischer moritz.fischer at ettus.com
Sat Oct 3 14:45:02 EDT 2015


Martin,


On Sat, Oct 3, 2015 at 12:33 AM, Martin via USRP-users
<usrp-users at lists.ettus.com> wrote:
> Hi,
>
> I have an application which uses GPS position data from the USRP.
> With B2X0 or N210 + GPSDO I can query the gps_gpgga and/or gps_gprmc sensors
> for this.
>
> But in E310 the gps_gpgga and gps_gprmc sensors seem to be missing in the
> current uhd driver that is installed in the latest sdcard devi image (uhd
> 3.8.5)

This feature was added in UHD 3.9. We don't have release images for
that right now,
however you can find testing images built against oe / yocto's fido branch at:

http://files.ettus.com/e3xx_images/alpha/fido-test/
>
> The only gps related sensors uhd_usrp_probe reports are gps_locked and
> gps_time.
>
> uhd_usrp_probe gives:
> root at ettus-e300:~/mlat/src# uhd_usrp_probe
> linux; GNU C++ version 4.9.1; Boost_105600; UHD_003.008.005-0-unknown
>
> -- Loading FPGA image: /usr/share/uhd/images/usrp_e310_fpga.bit... done
> -- Detecting internal GPSDO.... found
> ...
> -- Initializing time to the internal GPSDO
>   _____________________________________________________
>  /
> |       Device: E-Series Device
> |     _____________________________________________________
> |    /
> |   |       Mboard: E3XX
> |   |   product: 30674
> |   |   revision: 0
> |   |   serial: F661C4
> |   |   mac-addr: 00:80:2f:16:0c:0c
> |   |   FPGA Version: 8.0
> |   |
> |   |   Time sources: none, internal, external, gpsdo
> |   |   Clock sources: internal
> |   |   Sensors: temp, gps_locked, gps_time, ref_locked
>
> How can I get gps position data from E310?
>
> Is this a driver issue or a hardware issue?
>
> If the software routines are just not implemented, where in the uhd driver
> code should I look to implement them myself?
>
> Thanks in advance,
>
> Martin Dudok van Heel
>
>
>
>
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> USRP-users at lists.ettus.com
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Cheers,

Moritz




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