USRP2 AttributeError: 'usr p2_source_32fc_sptr' object has no attribute 'ad c_rate'¨

GNU Radio
1

Hello,

I tried to run usrp2_fft.py to test my USRP2 board and I got the
following error.
¨AttributeError: ‘usrp2_source_32fc_sptr’ object has no attribute
'adc_rate’¨

./find-usrps script is running fine with following result.
00:50:c2:85:30:0a hw_rev = 0x0300

My configuration is
-Ubuntu 8.04, with the latest svn (7 days old)

  • I am using Netgear Gigabit switch to connect to fast Ethernet port on
    my laptop. I could not directly connect my Gigabit PCMCIA card to USRP2.

Do you think this error is due to any configuration setting?

Thank you,
-C

./usrp2_fft.py -f 400M
Traceback (most recent call last):
 File “./usrp2_fft.py”, line 267, in
   main ()
 File “./usrp2_fft.py”, line 263, in main
   app = stdgui2.stdapp(app_top_block, “USRP2 FFT”, nstatus=1)
 File
“/usr/local/lib/python2.5/site-packages/gnuradio/wxgui/stdgui2.py”, line
36, in init
   wx.App.init (self, redirect=False)
 File
“/usr/lib/python2.5/site-packages/wx-2.8-gtk2-unicode/wx/_core.py”, line
7836, in init
   self._BootstrapApp()
 File
“/usr/lib/python2.5/site-packages/wx-2.8-gtk2-unicode/wx/_core.py”, line
7433, in _BootstrapApp
   return core.PyApp__BootstrapApp(*args, **kwargs)
 File
“/usr/local/lib/python2.5/site-packages/gnuradio/wxgui/stdgui2.py”, line
39, in OnInit
   frame = stdframe (self.top_block_maker, self.title, self._nstatus)
 File
“/usr/local/lib/python2.5/site-packages/gnuradio/wxgui/stdgui2.py”, line
60, in init
   self.panel = stdpanel (self, self, top_block_maker)
 File
“/usr/local/lib/python2.5/site-packages/gnuradio/wxgui/stdgui2.py”, line
81, in init
   self.top_block = top_block_maker (frame, self, vbox, sys.argv)
 File “./usrp2_fft.py”, line 71, in init
   input_rate = self.u.adc_rate() / self.u.decim()
   AttributeError: ‘usrp2_source_32fc_sptr’ object has no attribute
‘adc_rate’

2

The usrp2_fft python code was recently changed to use that adc_rate()
call, although the actual implementation returns the value to the input
pointer parameter.

Just change that line in usrp2_fft back to what it was so you can at
least test it:

From:

input_rate = self.u.adc_rate() / self.u.decim()

To:

input_rate = 100e6/options.decim

This simply a quick fix, I’m assuming the adc_rate function will be
changed to return the value the same way as decim() does.

Timothy R. Newman

DNI Post Doctoral Fellow

Wireless @ Virginia Tech

447 Durham Hall

Blacksburg, VA 24061

Phone: 540-231-2041

From: discuss-gnuradio-bounces+trnewman=removed_email_address@domain.invalid
[mailto:discuss-gnuradio-bounces+trnewman=removed_email_address@domain.invalid] On Behalf Of
Catalin LACATUS
Sent: Friday, November 07, 2008 10:35 AM
To: [email protected]
Subject: [Discuss-gnuradio] USRP2 AttributeError:
‘usrp2_source_32fc_sptr’ object has no attribute 'adc_rate’¨

Hello,

I tried to run usrp2_fft.py to test my USRP2 board and I got the
following error.
¨AttributeError: ‘usrp2_source_32fc_sptr’ object has no attribute
'adc_rate’¨

./find-usrps script is running fine with following result.
00:50:c2:85:30:0a hw_rev = 0x0300

My configuration is
-Ubuntu 8.04, with the latest svn (7 days old)

  • I am using Netgear Gigabit switch to connect to fast Ethernet port on
    my laptop. I could not directly connect my Gigabit PCMCIA card to USRP2.

Do you think this error is due to any configuration setting?

Thank you,
-C

./usrp2_fft.py -f 400M
Traceback (most recent call last):
File “./usrp2_fft.py”, line 267, in
main ()
File “./usrp2_fft.py”, line 263, in main
app = stdgui2.stdapp(app_top_block, “USRP2 FFT”, nstatus=1)
File
“/usr/local/lib/python2.5/site-packages/gnuradio/wxgui/stdgui2.py”, line
36, in init
wx.App.init (self, redirect=False)
File
“/usr/lib/python2.5/site-packages/wx-2.8-gtk2-unicode/wx/_core.py”, line
7836, in init
self._BootstrapApp()
File
“/usr/lib/python2.5/site-packages/wx-2.8-gtk2-unicode/wx/_core.py”, line
7433, in _BootstrapApp
return core.PyApp__BootstrapApp(*args, **kwargs)
File
“/usr/local/lib/python2.5/site-packages/gnuradio/wxgui/stdgui2.py”, line
39, in OnInit
frame = stdframe (self.top_block_maker, self.title, self._nstatus)
File
“/usr/local/lib/python2.5/site-packages/gnuradio/wxgui/stdgui2.py”, line
60, in init
self.panel = stdpanel (self, self, top_block_maker)
File
“/usr/local/lib/python2.5/site-packages/gnuradio/wxgui/stdgui2.py”, line
81, in init
self.top_block = top_block_maker (frame, self, vbox, sys.argv)
File “./usrp2_fft.py”, line 71, in init
input_rate = self.u.adc_rate() / self.u.decim()
AttributeError: ‘usrp2_source_32fc_sptr’ object has no attribute
‘adc_rate’