Re: [Discuss-gnuradio] USB2 problems with Fedora/USRP

[Eric Blossom]

On Wed, Jan 14, 2009 at 04:55:26PM +0100, Alberto Trentadue wrote:
> Hello
> 
> I've finally assembled the USRP few days ago, after being delayed some months.
> 
> The power-on behaviour looks as expected: one led blinks at 3 Hz or so.
> The next step is to try out some example, e.g. usrp_benchmark_usb.py or 
> usrp_wfm_rcv.py.
> Whatever the test I try, I can see that blinking led is switched of for a 
> couple seconds, then it blinks at lower 
> rate, and another led near to it turns on  (don't remember which is D402 and 
> D403).
> 
> On console, i get this kind of error:
> 
> usb_control_msg failed: error sending control message: Connection timed out
> usrp: failed to load fpga bitstream 
> /opt/gnuradio/share/usrp/rev4/std_2rxhb_2tx.rbf
> Traceback (most recent call last):
>     File "./usrp_benchmark_usb.py", line 106, in ?
>         main ( )
>     File "./usrp_benchmark_usb.py", line 96, in main
>         ok=run_test (rate, verbose)
>     File "./usrp_benchmark_usb.py", line 63, in run_test
>         usrp_tx=usrp.sink_s(0, tx_interp)
>     File 
> "/usr/local/hamradio/gnuradio/lib/python2.5/site-packages/gnuradio/usrp.py", 
> line 230, in __init__
>         fpga_filename, firmware_filename)
>     File 
> "/usr/local/hamradio/gnuradio/lib/python2.5/site-packages/gnuradio/usrp1.py", 
> line 940, in  sink_s
>         return _usrp1.sink_s(*args)
> RuntimeError: can't open usrp1
> 
> I'm using the latest svn checked-out source code.
> 
> I'm almost convinced that the problem is in the USB2 driver used by gnuradio 
> to control the USRP (ehci-hcd?).
> I have 2 questions:
> 1. What do you suggest to use to investigate and troubleshoot such USB2 
> problem on Fedora 9?
> 2. What does the second led turning on mean?
> 
> t.i.a. for help.
> Alberto


Confirm that your computer has an EHCI host controller.
Try 

  $ /sbin/lspci | grep -i ehci

and/or

  $ lsmod | grep ehci


The USRP only works with an EHCI host controller

Eric