Re: [Discuss-gnuradio] Error running benchmark_tx.py from "next" branch

[Josh Blum]

On 10/18/2011 04:02 PM, Nowlan, Sean wrote:
> I tried with the E100's actual address and the loopback address
> (127.0.0.1) and both worked. I should also say it's a bit confusing
> to call the command line switch "--address" when it's actually
> handling the arguments the same way as uhd_find_devices, etc. handle
> the "--args" switch. For instance, I also got it to run with
> --address="type=e100". Also it'd be nice (but not necessary) to have
> the program automatically detect if it's an E100 since it will never
> be controlling devices other than itself.
> 

I think this will help clear some things up:
http://files.ettus.com/uhd_docs/manual/html/identification.html#identifying-usrps

So, e100 will not actually respond to the addr key. I believe that the
error stems from the usrp2 find routine trying to send a discovery
packet on the address that you specified, which may be invalid to do.

So I guess my question is, what device address arguments are being
passed into the uhd source/sink constructor?

I recommend using an empty device address. But if you have other usrps
attached to the e100 somehow, and you build uhd with support for those
usrps, you may want to specify type=e100 as a way to filter the other
devices.

-Josh