Re: [Discuss-gnuradio] get GPS time from GPSDO module

[Bastien Auneau]

uhd::sensor_value_t val = usrp->get_mboard_sensor("ref_locked");

 works fine, no runtime error

uhd::sensor_value_t val = usrp->get_mboard_sensor("gps_locked");

 gets runtime error just like gps_time

On 28 July 2011 22:58, Bastien Auneau <address@hidden> wrote:

In case previous email with attached screenshot did not work
run-time error
Unhandled exception at 0x759ab9bc in TE.exe: Microsoft C++ exception: uhd::runtime_error at memory location 0x0018db9c..

code :

    uhd::sensor_value_t val = usrp->get_mboard_sensor("gps_time");
    std::cout << val.to_pp_string() << std::endl;

It gives unhandled exception at first line
And I realized that the exception happen every time, and after continuing (because VC9 breaks on unhandled exception) it gives this all same value :
  GPS time: 2077252342 seconds

On 28 July 2011 21:06, Nick Foster <address@hidden> wrote:

On Thu, 2011-07-28 at 20:13 +0200, Bastien Auneau wrote:
> I use :
> uhd::sensor_value_t val = usrp->get_mboard_sensor("gps_time");
> std::cout << val.to_pp_string() << std::endl;
>
>
> I got first an unhandled exception runtime error
> at second run, it outputs :
> GPS time: 2077252342 seconds
>
>
> and these two in a row at each try
>
>
> Also, the value returned 2077252342 never increase
> And I did not plug the GPS antenna, so the GPSDO is not locked
>
>
> How can I get is stable ?
> Why runtime error pops up half of the time ?

What runtime error are you seeing? Please cut and paste the error.

> should I plug the antenna and wait for GPS lock ?

Only if you really care what time it is.

> How do I check if GPS is locked ?

get_mboard_sensor("gps_locked")

--n

>
>
> On 28 July 2011 19:44, Nick Foster <address@hidden> wrote:
>
>         On Thu, 2011-07-28 at 19:03 +0000, Bastien Auneau wrote:
>         > Hi All
>         >
>         > I cannot find in latest version (downloaded the 28/07/2011)
>         how to get
>         > UTC time from GPSDO.
>         >
>         > There used to be a get_time() function in gps_ctrl, but not
>         anymore
>         > How should I do to get GPS time ?
>
>
>         The mboard_sensors interface should be used.
>         get_mboard_sensor("gps_time") should get you what you're
>         looking for.
>
>         --n
>
>         >
>         > Regards
>         > Bastien
>         >
>         > _______________________________________________
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>         > address@hidden
>         > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>
>
>
>