Re: [Discuss-gnuradio] Help with Usrp Board test

[Michael Dickens]

Melody -

On May 4, 2007, at 2:57 PM, Melody S wrote:
> I am trying to test my Usrp board, but there are two problems,
>
> 1 ) I have downloaded and install the gnuradio from Subversion and  
> as long as I look through the usrp/share/rev2, I have the files
>
> multi_2rxhb_2tx.rbf
> std_2rxhb_2tx.rbf
> std_4rx_0tx.rbf
> std.ihx
>
> and I don't have the files usrp_firmware.ihx and usrp_fpga.rbf
>
> should I download them and install or this is because of subversion?

SVN trunk should install everything you need.  What install guide are  
you using?  If Jon Jacky's, then he knows it's a bit out of date ;)

> 2) Also when I try to run this command
> ./test_usrp_standard_tx
>
> I get the following errors
>
> usb_control_msg failed: usb_control_msg(DeviceRequestTO): pipe is  
> stalled
> usb_control_msg failed: usb_control_msg(DeviceRequestTO): pipe is  
> stalled
> xfered 1.34e+08 bytes in 4.2 seconds.  3.194e+07 bytes/sec.  cpu  
> time = 0.71
> 0 underruns
>
> Does this mean that I don't have the right USB or it is because I  
> don't have the necessary files that I mentioned in question 1.

These are normal warning messages on Mac OSX.  The throughput is  
marginally less than 32 MBps, and thus your USRP should work OK for  
most USB communications (32 MBps is "ideal").  Try also the "./ 
test_usrp_standard_rx" program & see if it gets to 32 exactly.

Go into gnuradio-examples/python/usrp:

If your USRP has an FM capable card, try running:

pythonw usrp_wfm_rcv.py -f <good_local_FM_station>

If no FM card, try:

./benchmark_usb.py

And you might see similar messages as before, but it should usually  
work up to 32 MBps.  This means GNU Radio is installed and being  
accessed correctly! - MLD