Re: [Discuss-gnuradio] Problem with multiple flow graphs on receive side

[abbasi9999]

Hi Sriram ,

Did you managed to solve your problem?
I'm doing the same, but i don't have any errors. The connecting process is
ok, 

but i think there is a conflict between the "call_back" of the receiving
path and the "eval" function of the sensing path? have you faced some
problem like this?

if yes, please inform how did you solve it.

regards,



Sriram Krishnan-3 wrote:
> 
> Hi,
> I am trying to write an application which senses spectrum 
> (usrp_spectrum_sense.py) and transmits/receives signals. I have the 
> tx/rx working fine. But when i add another flow graph(3rd one to 
> existing tx and rx) for the spectrum sense,to the top block, it gives me 
> an error. I get an error on this line which says "cant open rx 
> interface" and "device busy"
> 
> self._u = usrp.source_c (self._which,
>                                 fusb_block_size=self._fusb_block_size,
>                                 fusb_nblocks=self._fusb_nblocks)
> 
> Is it because of competing receive paths. I thought that we could have 
> multiple paths.
> Could somebody help in this regard.
> 
> Sriram
> 
> 
>  
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> 

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