OFDM Benchmark- runtime error

GNU Radio
1

Hello to all the experts!
I am doing a mini project on GNU Radio using OFDM. Somehow I am getting
runtime errors when i try to run the benchmark scripts .

The message i get when trying to run benchmark_ofdm_tx.py is

hynet@hynet-laptop-2:~/gnuradio/gnuradio-examples/python/ofdm$
./benchmark_ofdm_tx.py -f2.4e9 -i200 --tx-ampl=200
usrp_open_interface:usb_claim_interface: failed interface 1
could not claim interface 1: Device or resource busy
usrp_basic_tx: can’t open tx interface
Traceback (most recent call last):
File “./benchmark_ofdm_tx.py”, line 217, in
main()
File “./benchmark_ofdm_tx.py”, line 190, in main
fg = usrp_graph(options)
File “./benchmark_ofdm_tx.py”, line 51, in init
self._setup_usrp_sink()
File “./benchmark_ofdm_tx.py”, line 66, in _setup_usrp_sink
fusb_nblocks=self._fusb_nblocks)
File “/usr/local/lib/python2.5/site-packages/gnuradio/usrp.py”, line
212, in init
fpga_filename, firmware_filename)
File “/usr/local/lib/python2.5/site-packages/gnuradio/usrp1.py”, line
710, in sink_c
return _usrp1.sink_c(*args)
RuntimeError: can’t open usrp1

Can anyone suggest some solution to this problem. The USRP board is
running fine since we tested the oscilloscope script on it

2

On Mon, Oct 01, 2007 at 10:33:25PM +0200, Sarang Mandke wrote:

usrp_basic_tx: can’t open tx interface
212, in init
fpga_filename, firmware_filename)
File “/usr/local/lib/python2.5/site-packages/gnuradio/usrp1.py”, line
710, in sink_c
return _usrp1.sink_c(*args)
RuntimeError: can’t open usrp1

Can anyone suggest some solution to this problem. The USRP board is
running fine since we tested the oscilloscope script on it

Is the o’scope running at the same time?
Note the message about “Device or resource busy”

Eric

3

Eric B. wrote:

On Mon, Oct 01, 2007 at 10:33:25PM +0200, Sarang Mandke wrote:

usrp_basic_tx: can’t open tx interface
212, in init
fpga_filename, firmware_filename)
File “/usr/local/lib/python2.5/site-packages/gnuradio/usrp1.py”, line
710, in sink_c
return _usrp1.sink_c(*args)
RuntimeError: can’t open usrp1

Can anyone suggest some solution to this problem. The USRP board is
running fine since we tested the oscilloscope script on it

Is the o’scope running at the same time?
Note the message about “Device or resource busy”

Eric

I am saying the error is the one shown here .I can’t interact via USB
interface with the USRP device. That goes without saying since the
program gives runtime errors when trying to access the USRP sink via
USB.

4

Sarang Mandke wrote:

USB.
Eric understands that, but he’s asking if you also have the oscilloscope
program running while you’re trying to run the OFDM benchmark. You
must close it before running the benchmark.

  • George
5

George N. wrote:

Sarang Mandke wrote:

USB.
Eric understands that, but he’s asking if you also have the oscilloscope
program running while you’re trying to run the OFDM benchmark. You
must close it before running the benchmark.

  • George

My mistake! I am running just OFDM benchmark here nothing else.