Re: [Discuss-gnuradio] packets to the usrp and loopback

[Eric Blossom]

On Thu, Apr 19, 2007 at 05:17:06PM -0400, George Nychis wrote:
> I'm starting to work out some test code regarding the host end, and I was 
> wondering how hard it will be when done testing to actually put a packet on 
> the bus?  I assume we can reuse some of the previous interface.

Not very hard.

> Question from Thibaud: is the loopback interface working on the USRP, and 
> how to enable it?

There is a loopback interface in the current FPGA code.  It's enabled
by writing to the FR_MODE register.  Grep the verilog for "loopback",
and look at fpga_regs_common.{h,v}

> We want to test out using the loopback eventually, and overall I'm 
> wondering how much time from when I finish the test code to putting a 
> packet on the interface so I can plan out this week. :)

I don't know.  When will you have the rest of the host code written?

I suggest that you treat this like it's "your project", not "Eric's
project".  I'm available to answer questions, respond to requests,
etc., but don't assume that the cavalry is coming ;)

What's your next step?

I'm working on mblock timeouts ;)

Eric