Re: [Discuss-gnuradio] How to get transmitted packet time in USRP?

[john jade]

Hi Josh,

Thanks for the reply.Is there any sample example you could send me? I looked at the link it has nothing related to this.

I want the code in python.

Thanks

I have another doubt...
 I just looked at tags_demo.cc example.In that code ,it has following lines

 const uhd::time_spec_t time_now = usrp_sink->get_time_now();

    boost::shared_ptr<tag_source_demo> tag_source = boost::make_shared<tag_source_demo>(
        time_now.get_full_secs() + 1, time_now.get_frac_secs(), //time now + 1 second
        samp_rate, idle_dur, burst_dur
    );

to get time.
1. Here TIME_NOW is mother board time or something else?
2. What should i do if i have to get time in nanoseconds?

3.Is there any option to do it in python?

Thanks.

On Fri, Mar 8, 2013 at 11:42 AM, Josh Blum <address@hidden> wrote:

On 03/07/2013 06:38 PM, john jade wrote:
> Hi,
>
> I am using 2 USRPN210 devices one for transmitting and one for receiving
> and relaying it back to sender. I want time at which packet is transmitted
> in both the devices.I am using benchmark_tx and bencmark_rx codes.
> please help me the code that i have to put...
>

Actually, it works the other way around, you can control the time a
packet is transmitted using stream tags.

A few good links about this section:

http://code.ettus.com/redmine/ettus/projects/uhd/wiki/GNU_Radio_UHD#Using-UHD-Software-with-GNU-Radio

-josh

> Thanks.
>
>
>
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