[Discuss-gnuradio] Error while using uhd usrp blocks
From:
shashank gaur
Subject:
[Discuss-gnuradio] Error while using uhd usrp blocks
Date:
Fri, 27 Jan 2012 15:39:37 +0100
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