Re: [Discuss-gnuradio] dbs_rx problems?

[LRK]

On Thu, Sep 29, 2005 at 11:36:43AM -0700, Eric Blossom wrote:
> 
> Random thoughts: after the firmware is loaded into the USRP, it
> simulates a USB unplug, replug and comes back as another device,
> distinguished from the first by a different "Device ID".

I'm pretty sure that is the problem. FreeBSD 5.x handles devices using
the 'devfs' method and I have not mastered that yet. Like most docs,
what it says and what it does do not seem to match.

I can get owner and permissions to set to whatever I want at boot time
but then it doesn't do that on the subsequent functions.

 
> The "new device" implements three endpoints.  

Does it change the device name?


> Make sure all of them are accessible from NetBSD.

I can't since new devices appear and disappear as the program runs. Thus 
if the devfs doesn't set the permissions right, it becomes inaccessible.
Running as root did not seem to work either but I haven't exahusted all
possibilities.

The failure below seems to find 'interface' and fail on 'altinterface'
which use the numbers 2 and 0 as noted. I'm not clear what the 'alt' is
and if zero is valid. Currently I have one BasicRX board on the USRP at
the RXA position. The LED and log message seem to indicate the load works
and the USRP is found to be already loaded after that. But

What test should I be running to verify the RX is found and working?


usrp_open_interface:usb_set_alt_interface: failed
could not set alt intf 2/0: Invalid argument
usrp_basic_rx: can't open rx interface


Again, the log message when loaded:

kernel: ugen0: Free Software Folks USRP Rev 2, rev 2.00/1.02, addr 2


-- 
LRK
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