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Re: [Discuss-gnuradio] GNU Radio + UHD install

From: Marcus D. Leech
Subject: Re: [Discuss-gnuradio] GNU Radio + UHD install
Date: Fri, 13 May 2011 07:03:15 -0400
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv: Gecko/20101027 Fedora/3.0.10-1.fc12 Thunderbird/3.0.10

On 05/13/2011 06:39 AM, Vladutzzz wrote:
> Hi Marcus,
> I followed all of your step-by-step instructions and after installation, the
> uhd_find_devices command returns:
> --------------------------------------------------
> linux; GNU C++ version 4.4.3; Boost_104000; UHD_003.001.000-d11bb4e
> -- UHD Device 0
> Device Address:
>     type: usrp2
>     addr:
>     name: 
>     serial: 
> --------------------------------------------------
> Although UHD seems to function appropriately, when running GRC in sudo, and
> pressing the Execute flow graph button, the following  error is returned:
> --------------------------------------------------
> Traceback (most recent call last):
>   File "/home/vl/grc_files/top_block.py", line 52, in <module>
>     tb = top_block()
>   File "/home/vl/grc_files/top_block.py", line 30, in __init__
>     self.usrp2_source_xxxx_0 = usrp2.source_32fc()
>   File
> "/usr/local/lib/python2.6/dist-packages/gnuradio/usrp2/usrp2_swig.py", line
> 725, in source_32fc
>     return _usrp2_swig.source_32fc(ifc, mac)
> RuntimeError: No USRPs found on interface eth0
> --------------------------------------------------
> I proceeded to uninstalling GNURadio and UHD and then running the code
> build-gnuradio from the link you provided above.
> After installation and logging out, the same pattern emerges.
> The uhd_find_devices command has the same output as before, as does running
> the GRC flow graph.
> Could it be possible that I didn't uninstall the components correctly?
> (although the scrip says it does that too)
> My fpga and firmware images are u2_rev3_uhd_20100706.bin and
> txrx_uhd_20100706.bin
> My setup is USRP2 + WBX
> Thanks.
> Vlad.
If what you report about your firmware images is accurate, then they're
horribly out of date.

The build-gnuradio script will have downloaded the latest firmware
images, which you should program
  into your USRP2.

Also, you're using the wrong source block in GRC--you need a UHD block,
not a (traditional) USRP2
  block.  UHD has a completely different set of source/sink blocks than
"traditional", although the
  "traditional" blocks are still there in GRC.

Principal Investigator
Shirleys Bay Radio Astronomy Consortium

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