Re: [Discuss-gnuradio] getting IQ data from 2 uspr1 synchronously

[Doug Geiger]

Check out the usrp_multi code - I believe it all got updated to work 
with the hier_block2 API update. It's in 
gnuradio-examples/python/multi_usrp, and it comes with a custom FPGA 
image (pre-inband signaling - the timestamps get interleaved with the 
data, and the data gets de-interleaved and ordered correctly on the 
host.  One USRP provides a master clock that the second slaves to  - via 
an SMA connector you'll have to solder in (in addition, two pins on the 
daugherboard interface are used to send a 'start' pulse, similar to the 
1pps function on the USRP2).
I haven't messed with it in a while, but it worked when I last tried it 
out.
Doug
> On Mon, 2010-01-25 at 11:29 +0100, Luca Pascale wrote:
>   
> > HI all,
> >
> > I need to get IQ samples from 2 USRP1 in a synchronous manner. 
> >
> > Thus I cant make:
> >
> > urx1->read()
> > urx2->read()
> >
> > I'need to execute the two "read()" operation "at the same time" (or
> > something similar).
> >
> > Any suggestion to do that ?
> >
> > Thanks in advance
> > Luca
> >
> >
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--
Douglas Geiger
Code 5545
U.S. Naval Research Laboratory
Washington, DC 20375
(202) 767-9048
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