[Discuss-gnuradio] Unable to find USRP #0

[hacper]

Dear all:
 
  I am trying to run seom example codes on USRP. My computer equipes USB 1.1. I 
use Fedora Core 7 + python 2.5 + gnuradio 3.0.3 to bulid the GNU Radio. I had 
followed http://gnuradio.org/trac/wiki/BuildGuide to bulid the GNU Radio. 
However, when I run tunnel.py to build physical setting for WiFi, I type 
following commands:
 
python tunnel.py -v -f 2400E6 --bitrate 50k -i 32 -d 16 
 
some errors occur as follows:
 
 File "tunnel.py", line 288, in <module>
    main()
  File "tunnel.py", line 249, in main
    options)
  File "tunnel.py", line 95, in __init__
    self.txpath = transmit_path(self, mod_class, options)
  File 
"/usr/src/CR/gnuradio-3.0.3/gnuradio-examples/python/digital/transmit_path.py", 
line 61, in __init__
    self._setup_usrp_sink()
  File 
"/usr/src/CR/gnuradio-3.0.3/gnuradio-examples/python/digital/transmit_path.py", 
line 110, in _setup_usrp_sink
    fusb_nblocks=self._fusb_nblocks)
  File "/usr/local/lib/python2.5/site-packages/gnuradio/usrp.py", line 209, in 
__init__
    _ensure_rev2(which)
  File "/usr/local/lib/python2.5/site-packages/gnuradio/usrp.py", line 82, in 
_ensure_rev2
    v = _look_for_usrp(which)
  File "/usr/local/lib/python2.5/site-packages/gnuradio/usrp.py", line 76, in 
_look_for_usrp
    raise RuntimeError, "Unable to find USRP #%d" % (which,)
RuntimeError: Unable to find USRP #0
 
I guess that the usb maybe cannot understand USRP platform. 
Could you give me some help?
 
 
 Best Regard


      
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