Re: [Discuss-gnuradio] USRP1 "hangs", benchmark doesn't continue

2010-03-08 Thread Alexander List
On 3/9/10 1:19 AM, Matt Ettus wrote:

> Sounds like there is a clock problem.  Can you measure the clock with
> an oscilloscope?  What about when you remove the daughterboards?
I don't have one at home, but I guess I'll find someone in Zurich who has ;)

Removing the daughterboards yields no change with usrp_benchmark_usb :(

I hope I haven't killed the oscillator? I connected the output of X2 to
each of the daugherboard connector's clock lines (clock db a p) with 47
Ohms in front of each connector.

Alex



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Re: [Discuss-gnuradio] USRP1 "hangs", benchmark doesn't continue

2010-03-08 Thread Matt Ettus

On 03/08/2010 04:10 PM, Alexander List wrote:

Hi,

* I've installed the latest and greatest gnuradio from git, everything
compiled fine.

* I have a pre-500 USRP1, and fixed the wiring of the clock to the four
daughterboard sockets.

* I've been running gnuradio on this hardware ~2 weeks ago successfully.

Now, when I try to run anything that connects to the USRP, it just
"hangs". It downloads the firmware (blinking gets slower), it identifies
my two WBX boards correctly, but:



Sounds like there is a clock problem.  Can you measure the clock with an 
oscilloscope?  What about when you remove the daughterboards?


Matt


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[Discuss-gnuradio] USRP1 "hangs", benchmark doesn't continue

2010-03-08 Thread Alexander List
Hi,

* I've installed the latest and greatest gnuradio from git, everything
compiled fine.

* I have a pre-500 USRP1, and fixed the wiring of the clock to the four
daughterboard sockets.

* I've been running gnuradio on this hardware ~2 weeks ago successfully.

Now, when I try to run anything that connects to the USRP, it just
"hangs". It downloads the firmware (blinking gets slower), it identifies
my two WBX boards correctly, but:

---8<---
$ /opt/gnuradio/HEAD/share/gnuradio/examples/usrp/usrp_benchmark_usb.py
Testing 2MB/sec...
---8<---

...and that's where it ends. It just hangs there.

If I try usrp_oscope.py on a local radio station, I see *nothing*.

I also tried usrp_wfm_rcv_nogui.py:

$ usrp_wfm_rcv_nogui.py -f 100.6e6 -O plughw:0,0 -g 30

When I strace the process, I only see

select(0, NULL, NULL, NULL, {0, 2000})  = 0 (Timeout)
select(0, NULL, NULL, NULL, {0, 4000})  = 0 (Timeout)
select(0, NULL, NULL, NULL, {0, 8000})  = 0 (Timeout)
select(0, NULL, NULL, NULL, {0, 16000}) = 0 (Timeout)

Any hints?

Alex



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