Re: [Discuss-gnuradio] Getting Time Stamps From an x310 in C++

[Robert Kraml]

Thank you Martin.

This one looks like it will involve some research.  If I have time I'll 
pursue it.  In the meantime if anyone has some C++ example code that 
shows how an application might extract time tags, I would be grateful.

-Bob

On 7/6/2016 5:58 PM, Martin Braun wrote:
> USRPs will only output timestamps at the beginning of streaming, or when
> time skips (e.g. after an overrun). You can keep track of time by
> counting samples in between timestamp tags.
>
> See the header_payload_demux block for an example of how to keep track
> of time. Also, check out the gr-uhd manual for an explanation of the
> tags it uses, e.g.
> http://gnuradio.org/doc/doxygen/classgr_1_1uhd_1_1usrp__source.html.
> M
>
> On 07/06/2016 04:27 PM, Robert Kraml wrote:
> > I have a C++ implemented flow-graph that acquires 3 channels at a sample
> > rate of 5 MHz.  There are a couple of decimation stages with the
> > resultant n a number of 250 Hz output channels.  How is the best way to
> > access the associated time stamps.  I wouldn't need every time stamp,
> > just perhaps one every second or so and the rest would be interpolated.
> > Might there be some c++ examples of how this would be best done?
> >
> > -Bob
> >
> >
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