[Discuss-gnuradio] can't open usrp

[yenw]

Hi all,
I had received a USRP (Rev 4.5) from someone. The USRP was modified to
operate in slave mode. 
First I opened it and powered on; the LED was blinking.
So I did the following.
1. turned it OFF and open circuited R2030 and short-circuited R2029
2. move C926 to C925
3. added C924
4. powerd on the USRP; the LED was OFF
5. checked the onboard clock by probing at J2002 and got a 64MHz
sinusoidal(?) waveform on my oscilloscope. that means the power supply is
okey and the clock is working right?
6. I run usrp examples, and got the following error.

usrp: failed to find usrp[0]
Tracback most recent calls last):
File "./usrp_wfm_rcv.py", line 297, in <module>

...
...

File "/usr/lib/python2.6/dist-packages/gnuradio/usrp/usrp_swig.py", line
1646, in source_c
return _usrp_swig.source_c(*args, **kwargs)
RuntimeError: can't open usrp

I get the same error message when I run this code without the USRP; the only
difference is that it hangs for about 3 minutes before printing the message
when the USRP is connected.

I checked the var/log/messages file and got the following

...
...
Nov  1 02:28:39 ubuntu kernel: [   84.660128] usb 6-1: new full speed USB
device using uhci_hcd and address 2
Nov  1 02:29:10 ubuntu kernel: [  115.204109] usb 6-1: new full speed USB
device using uhci_hcd and address 3
Nov  1 02:29:40 ubuntu kernel: [  145.748130] usb 6-1: new full speed USB
device using uhci_hcd and address 4
Nov  1 02:29:51 ubuntu kernel: [  156.104109] usb 6-1: new full speed USB
device using uhci_hcd and address 5
Nov  1 02:30:02 ubuntu kernel: [  167.236865] ppdev: user-space parallel
port driver
Nov  1 02:30:02 ubuntu kernel: [  167.734779] pci 0000:01:00.0: PCI INT A ->
GSI 16 (level, low) -> IRQ 16
Nov  1 02:30:02 ubuntu kernel: [  167.851583] [drm] Initialized drm 1.1.0
20060810
Nov  1 02:30:02 ubuntu kernel: [  167.903478] [drm] Initialized radeon
1.29.0 20080528 on minor 0
Nov  1 02:30:03 ubuntu kernel: [  168.462061] [drm] Setting GART location
based on new memory map
Nov  1 02:30:03 ubuntu kernel: [  168.463564] [drm] Loading R500 Microcode
Nov  1 02:30:03 ubuntu kernel: [  168.463620] [drm] Num pipes: 1
Nov  1 02:30:03 ubuntu kernel: [  168.463636] [drm] writeback test succeeded
in 1 usecs
Nov  1 02:30:06 ubuntu kernel: [  170.992490] ADDRCONF(NETDEV_UP): eth0:
link is not ready
Nov  1 02:30:06 ubuntu kernel: [  170.993252] iwl3945 0000:10:00.0:
firmware: requesting iwlwifi-3945-1.ucode
Nov  1 02:30:06 ubuntu kernel: [  171.025597] iwl3945: Radio disabled by HW
RF Kill switch
Nov  1 02:33:28 ubuntu kernel: [  373.160196] usb 2-3: new high speed USB
device using ehci_hcd and address 6
Nov  1 02:33:58 ubuntu kernel: [  403.704165] usb 2-3: new high speed USB
device using ehci_hcd and address 7
Nov  1 02:34:29 ubuntu kernel: [  434.248213] usb 2-3: new high speed USB
device using ehci_hcd and address 8
Nov  1 02:34:39 ubuntu kernel: [  444.604196] usb 2-3: new high speed USB
device using ehci_hcd and address 9
Nov  1 02:34:50 ubuntu kernel: [  455.116167] usb 6-1: new full speed USB
device using uhci_hcd and address 6
Nov  1 02:35:20 ubuntu kernel: [  485.660170] usb 6-1: new full speed USB
device using uhci_hcd and address 7
Nov  1 02:35:51 ubuntu kernel: [  516.316170] usb 6-1: new full speed USB
device using uhci_hcd and address 8
Nov  1 02:36:01 ubuntu kernel: [  526.676176] usb 6-1: new full speed USB
device using uhci_hcd and address 9
Nov  1 02:39:36 ubuntu kernel: [  740.988173] usb 6-1: new full speed USB
device using uhci_hcd and address 10
Nov  1 02:40:06 ubuntu kernel: [  771.532193] usb 6-1: new full speed USB
device using uhci_hcd and address 11
Nov  1 02:40:37 ubuntu kernel: [  802.076169] usb 6-1: new full speed USB
device using uhci_hcd and address 12
Nov  1 02:40:47 ubuntu kernel: [  812.432174] usb 6-1: new full speed USB
device using uhci_hcd and address 13
Nov  1 02:43:31 ubuntu kernel: [  976.392172] usb 6-1: new full speed USB
device using uhci_hcd and address 14
Nov  1 02:44:02 ubuntu kernel: [ 1006.936172] usb 6-1: new full speed USB
device using uhci_hcd and address 15
Nov  1 02:44:32 ubuntu kernel: [ 1037.480201] usb 6-1: new full speed USB
device using uhci_hcd and address 16
Nov  1 02:44:42 ubuntu kernel: [ 1047.836075] usb 6-1: new full speed USB
device using uhci_hcd and address 17
Nov  1 02:46:21 ubuntu kernel: [ 1146.729201] usb 6-1: new full speed USB
device using uhci_hcd and address 18
Nov  1 02:46:52 ubuntu kernel: [ 1177.272174] usb 6-1: new full speed USB
device using uhci_hcd and address 19
Nov  1 02:47:22 ubuntu kernel: [ 1207.816175] usb 6-1: new full speed USB
device using uhci_hcd and address 20

please help me fix it

Regards!
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