Re: [Discuss-gnuradio] usrper fails in usb_claim_interface

[Eric Blossom]

On Wed, Apr 27, 2005 at 11:19:37PM -0400, James Cooley wrote:
> 
> How does the USRP know to load its firmware?

Every time you instantiate a usrp source or sink it checks to see if
it needs firmware and/or an fpga bitstream.  The library code checks
two MD5 hashes that are stored in the FX2 ram, one for the firmware
and one for the fpga configuration.  Loading both takes about
12 seconds.

> I notice the first time I 
> run, there's a bit of a delay as stuff happens behind the scenes. It may 
> be the case that if it has already been loaded (or thinks it has), this 
> situation happens. Is there a way to force a re-load or whatever else is 
> going on?

You shouldn't need to force a reload.

If you want to try forcing a reload use this:

  $ usrper load_standard_bits


If you want to see diagnostic messages when it's checking and/or
loading the firmware and/or fpga, change the definition of VERBOSE on
line 47 of usrp_prims.cc from 0 to 1.

> This is a debian testing distro with a 2.6.10 kernel on top.

Thanks,
Eric