I found that I am using libusb-win32 version 0.1.12.0-1, I change it to
version 0.1.10.1-3. I plugged TX and RX in my USRP device. but I got this
error.
$ python test_counting.py
found 5 busses
found 5 busses
usrp_open_interface:usb_claim_interface: failed interface 2
could not claim interface 2, interface invalid
usrp_basic_rx: can't open rx interface
Traceback (most recent call last):
File "test_counting.py", line 53, in ?
main ()
File "test_counting.py", line 46, in main
fg = build_graph ()
File "test_counting.py", line 36, in build_graph
usrp_rx = usrp.source_s (0, rx_decim, 1, 0x32103210,
usrp.FPGA_MODE_COUNTING)
File "/usr/local/lib/python2.4/site-packages/gnuradio/usrp.py", line 266,
in __init__
fpga_filename, firmware_filename)
File "/usr/local/lib/python2.4/site-packages/gnuradio/usrp1.py", line
1502, in source_s
return _usrp1.source_s(*args)
RuntimeError: can't open usrp1