Hello all Thank you very much for such prompt response. @Marcus: I understand the problem now and will try to implement the Rx and Tx on different USRP on Monday. The weeekend has already started here in France. @Andrew: I will also get back with exact result of the commands but what I remember for uhd_find_devices the result was the device address that is 4d9de875 and in uhd_usrp_probe it detected all the available RX and Tx (it has Flex900). Apologies for the delay but cannot access the usrp before Monday. The mentor doesnt allow me to have usrp at home. Hope you understand Thanks again for your time
shashank gaur On Fri, Jan 27, 2012 at 9:18 PM, Marcus D. Leech <mle...@ripnet.com> wrote: > ** > 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>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 >> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >> >> > > _______________________________________________ > Discuss-gnuradio mailing > listDiscuss-gnuradio@gnu.orghttps://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 Consortiumhttp://www.sbrac.org > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > >
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