Re: [Discuss-gnuradio] Recent Changes to UHD causing issue for USRP1?

[john]

On Sun, 2011-04-24 at 20:57 -0700, Josh Blum wrote:
> > address@hidden:~$ uhd_find_devices
> > linux; GNU C++ version 4.4.3; Boost_104000; UHD_003.000.001-627075e
> > 
> > --------------------------------------------------
> > -- UHD Device 0
> > --------------------------------------------------
> > Device Address:
> >     type: usrp1
> >     name: 
> >     serial: 
> > 
> > 
> > ( as an aside, I think I would have gotten this the last time if I had
> > allowed the USRP unit a bit of time to load itself after powering on).
> > 
> > It finds/defaults to usrp1 (which IS the unit) but does not return the
> > serial number (4c745353) so perhaps it is not really detecting anything?
> > 
> 
> Its reading the serial directly from eeprom as an ascii string. If the
> first character wasnt valid ASCII, then it would just return with a
> blank string. I wouldnt worry about it, your USRP seems to be working
> just fine.
> 
> -josh
Thanks Josh but the issue is that on one UBUNTU 10.04 system I get the
serial number returned by uhd_find_devices and GnuRadioCompanion works
and on the other, I don't get a serial number on uhd_find_devices and
GRC complains with:


linux; GNU C++ version 4.4.3; Boost_104000; UHD_003.000.001-627075e

>>> gr_fir_ccc: using 3DNow!Ext
Loading firmware image: /home/john/usrp1_fw.ihx... done
Traceback (most recent call last):
  File "/home/john/fm_rx.py", line 502, in <module>
    tb = fm_rx()
  File "/home/john/fm_rx.py", line 269, in __init__
    num_channels=1,
  File
"/usr/local/lib/python2.6/dist-packages/gnuradio/uhd/__init__.py", line
74, in constructor_interceptor
    return old_constructor(*args, **kwargs)
  File
"/usr/local/lib/python2.6/dist-packages/gnuradio/uhd/uhd_swig.py", line
1656, in usrp_source
    return _uhd_swig.usrp_source(*args, **kwargs)
RuntimeError: LookupError: KeyError: No devices found for ----->
Device Address:
    serial: 4c745353

I am 'feeding' in the serial number on the UHD: USRP source block.

I was trying to use uhd_find_devices as the diagnostic tool.

I should repeat that on the 'good' environment, the probe indentifies
USRP DBs correctly.

       Kind Regards,

               John