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Re: [Discuss-gnuradio] Tunnel and sense in the same USRP device

From: Dan Rosenqvist
Subject: Re: [Discuss-gnuradio] Tunnel and sense in the same USRP device
Date: Sun, 2 Aug 2009 23:46:03 -0700 (PDT)

曾繁勛 wrote:
> Hi All,
>         Here is my experiment environment:
>                 Host A: one USRP1 + two RFX2400
>                 Host B: one USRP1 + one RFX2400
>                 Both of these two hosts, I am using the gnuradio trunk
> version and fedora core 7.
>         Goal: tunnel on a specific spectrum and sense a wideband spectrum
> range(2.3GHz to 2.5GHz in this example).
>         I want to use this environment to achieve tunneling between two
> hosts and simultaneously sense wideband on host A, so I have modified the
> widespectrum.py and tunnel.py. I have tried to combine these two programs
> into one program. However when I execute this program (type
> ./tunnel_sense.py –f 2.462G 2.3G 2.5G), this program locked after I
> configure the gr0 interface.
>         I know that when I configure the gr0 interface, the procedure will
> jump into the sense_loop(tb), but I can’t realize why the procedure locked
> at the while loop of sense_loop(tb). The attached file is the program
> which
> I have modified.
>         Is there anyone doing the thing or any suggestion? Any suggestions
> are good for me…more appreciated, thanks.
> Joey
> _______________________________________________
> Discuss-gnuradio mailing list
> address@hidden
> http://lists.gnu.org/mailman/listinfo/discuss-gnuradio


The problem seem to be related to your definition of your USRP source. The
source is defined in receive_path but your trying to access it in
tunnel_sense as being a source within the topblock. I would define it in the
topblock and pass it along to the rx path.

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