UHD Error

Dear all,

I am new to gnuradio. I am trying to run an experiment, but I got an
error
as follows:

UHD Error:
USB open failed: insufficient permissions.
See the application notes for your device.
Traceback (most recent call last):
File “/home/van-ly/GNU_Radio/SDR Implementation of OFDM-based Network
Coding_Project Codes and Files/ofdm_transmitter.py”, line 198, in

tb = ofdm_transmitter()
File “/home/van-ly/GNU_Radio/SDR Implementation of OFDM-based Network
Coding_Project Codes and Files/ofdm_transmitter.py”, line 67, in
init
channels=range(1),
File
“/usr/local/lib/python2.7/dist-packages/gnuradio/uhd/init.py”,
line 121, in constructor_interceptor
return old_constructor(*args)
File
“/usr/local/lib/python2.7/dist-packages/gnuradio/uhd/uhd_swig.py”,
line 2208, in make
return _uhd_swig.usrp_sink_make(*args)
RuntimeError: LookupError: KeyError: No devices found for ----->
Empty Device Address

*Then I tried a command (sudo uhd_usrp_probe) to test the UHD
installation
and I got *

linux; GNU C++ version 4.8.1; Boost_104800; UHD_003.005.004-0-unknown

– Loading firmware image: /usr/local/share/uhd/images/usrp1_fw.ihx…
done
– Opening a USRP1 device…
– Loading FPGA image: /usr/local/share/uhd/images/usrp1_fpga.rbf…
done
– Using FPGA clock rate of 64.000000MHz…


/
| Device: USRP1 Device
| _____________________________________________________
| /
| | Mboard: USRP1
| | serial: 6R2706U1
| |
| | Time sources: none
| | Clock sources: internal
| | Sensors:
| | _____________________________________________________
| | /
| | | RX DSP: 0
| | | Freq range: -32.000 to 32.000 Mhz
| | _____________________________________________________
| | /
| | | RX DSP: 1
| | | Freq range: -32.000 to 32.000 Mhz
| | _____________________________________________________
| | /
| | | RX Dboard: A
| | | _____________________________________________________
| | | /
| | | | RX Frontend: 0
| | | | Name: Unknown (0xffff) - 0
| | | | Antennas:
| | | | Sensors:
| | | | Freq range: 0.000 to 0.000 Mhz
| | | | Gain Elements: None
| | | | Connection Type: IQ
| | | | Uses LO offset: No
| | | _____________________________________________________
| | | /
| | | | RX Codec: A
| | | | Name: ad9522
| | | | Gain range pga: 0.0 to 20.0 step 1.0 dB
| | _____________________________________________________
| | /
| | | RX Dboard: B
| | | ID: RFX2400 (0x0027)
| | | Serial: E5R12YBR2
| | | _____________________________________________________
| | | /
| | | | RX Frontend: 0
| | | | Name: RFX2400 RX
| | | | Antennas: TX/RX, RX2, CAL
| | | | Sensors: lo_locked
| | | | Freq range: 2300.000 to 2900.000 Mhz
| | | | Gain range PGA0: 0.0 to 70.0 step 0.0 dB
| | | | Connection Type: QI
| | | | Uses LO offset: No
| | | _____________________________________________________
| | | /
| | | | RX Codec: B
| | | | Name: ad9522
| | | | Gain range pga: 0.0 to 20.0 step 1.0 dB
| | _____________________________________________________
| | /
| | | TX DSP: 0
| | | Freq range: -44.000 to 44.000 Mhz
| | _____________________________________________________
| | /
| | | TX DSP: 1
| | | Freq range: -44.000 to 44.000 Mhz
| | _____________________________________________________
| | /
| | | TX Dboard: A
| | | _____________________________________________________
| | | /
| | | | TX Frontend: 0
| | | | Name: Unknown (0xffff) - 0
| | | | Antennas:
| | | | Sensors:
| | | | Freq range: 0.000 to 0.000 Mhz
| | | | Gain Elements: None
| | | | Connection Type: IQ
| | | | Uses LO offset: No
| | | _____________________________________________________
| | | /
| | | | TX Codec: A
| | | | Name: ad9522
| | | | Gain range pga: -20.0 to 0.0 step 0.1 dB
| | _____________________________________________________
| | /
| | | TX Dboard: B
| | | ID: RFX2400 (0x002b)
| | | Serial: E5R12YBR2
| | | _____________________________________________________
| | | /
| | | | TX Frontend: 0
| | | | Name: RFX2400 TX
| | | | Antennas: TX/RX, CAL
| | | | Sensors: lo_locked
| | | | Freq range: 2300.000 to 2900.000 Mhz
| | | | Gain Elements: None
| | | | Connection Type: IQ
| | | | Uses LO offset: Yes
| | | _____________________________________________________
| | | /
| | | | TX Codec: B
| | | | Name: ad9522
| | | | Gain range pga: -20.0 to 0.0 step 0.1 dB

Can anyone tell me why so? and help me how to fix this error.
Thanks in advance
Van-Ly
Nguyen Van-Ly,
Vietnam National University, Hanoi - VNU
University of Engineering and Technology - UET
Faculty of Electronics and Telecommunications - FET

Tel: +84 978 819 406

Standing on my own two feet !!!

Follow the instructions in section “Setup Udev for USB (Linux)” at the
following URL for you to be able to access your USRP1 with non-root
permissions:

http://files.ettus.com/uhd_docs/manual/html/transport.html#setup-udev-for-usb-linux

An easy way to locate the ‘uhd-usrp.rules’ file is to run the following:

sudo find / -name uhd-usrp.rules

Mike


Mike J. M0MIK BSc MIET
Ettus R. Technical Support
Email: [email protected]
Web: http://ettus.com

On Sat, Jun 28, 2014 at 5:39 AM, Nguyễn Văn Lý
[email protected]

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