On 27/01/12 03:00 PM, Andrew Davis wrote: > Type " uhd_find_devices " into console, then " uhd_usrp_probe " then > give us the results, and the code for the program you're trying to run. > > On Fri, Jan 27, 2012 at 9:39 AM, shashank gaur <shashankg...@ieee.org > <mailto:shashankg...@ieee.org>> wrote: > > Hello > > I am simply trying to build a transmitter and receiver for bpsk > modulation and demodulation using mpsk receiver at receiving end. > I am using USRP1 (Flex900 Daughter boards))with Gnuradio Companion > 3.5.0rc0 on Ubuntu 10.10. > When I run either (trransmitter or receiver) of any grc > applications first the grc executes it successfully and when I run > other the grc gives following error. > linux; GNU C++ version 4.4.5; Boost_104200; UHD_003.003.001-8ff8f20 > > Traceback (most recent call last): > File "/home/sunny/Examples/top_block.py", line 105, in <module> > tb = top_block() > File "/home/sunny/Examples/top_block.py", line 40, in __init__ > num_channels=1, > File > "/usr/local/lib/python2.6/dist-packages/gnuradio/uhd/__init__.py", > line 93, in constructor_interceptor > return old_constructor(*args, **kwargs) > File > "/usr/local/lib/python2.6/dist-packages/gnuradio/uhd/uhd_swig.py", > line 2003, in usrp_sink > return _uhd_swig.usrp_sink(*args, **kwargs) > RuntimeError: LookupError: KeyError: No devices found for -----> > Device Address: > serial: 4d9de875 > > > I think it has something to do with USRP UHD Source/Sink block > parameters. > Either the grc is not able to recognize the daughter board or > there is problem with hardware. may be I am wrong. > Please help me to recognize the error. > Thank you very much for your time > Shashank Gaur > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org <mailto:Discuss-gnuradio@gnu.org> > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > Just so we're clear here. If you're trying to run your RX and TX as two separate processes, against the same USRP1, that won't work. You'll need to have two independant USRP1s, or collapse your RX and TX into a single combined program--only one process can have a "handle" against each USRP1 at a time.
-- Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org
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