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Re: [Discuss-gnuradio] Tx and Rx on USRP simultaneously, device already


From: Marcus D Leech
Subject: Re: [Discuss-gnuradio] Tx and Rx on USRP simultaneously, device already claimed
Date: Mon, 7 Oct 2019 14:17:56 -0400

 Could you share a minimal flow graph that displays the issue?

Sent from my iPhone

> On Oct 7, 2019, at 2:08 PM, Mark Wagner <address@hidden> wrote:
> 
> Hey everyone,
> 
> I'm trying to transmit from the TX/RX port of a USRP while receiving from RX2 
> but I'm getting a 'device already claimed' error message. Here are some 
> details:
> 
> My USRP sink block uses multiple USRP addresses, i.e. 
> 
> "addr0=192.168.1.2,addr1=192.168.2.2,addr3=192.168.3.2,..."
> 
> and each address goes to a different USRP in an array. I want to transmit a 
> calibration tone across the array from the TX channel of the first USRP 
> (addr0), but when I add a USRP source block it gives a 'device already 
> claimed' message. This doesn't happen when I make individual USRP sink blocks 
> for each USRP in the array. 
> 
> Unfortunately if I separate my devices into several USRP sink blocks I can't 
> guarantee the devices will be synched to the PPS. Is there a workaround for 
> this?
> 
> -Mark
> 
> -- 
> Mark Wagner
> University of California San Diego
> Electrical and Computer Engineering
>  
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