Forum: GNU Radio USRP2 Reception Problem

I m using USRP2,I have configured usrp2 and tested
uhd_usrp_probe,uhd_siggen_gui and uhd_fft all works fine.
Now i want to make my own program like uhd_fft but there is a problem 
that
the terminal prompt returns right after i execute the program with
notification

root@aqs-desktop:/home/aqs/Desktop# python my_uhd_fft.py
linux; GNU C++ version 4.4.3; Boost_104000; 
UHD_003.004.003-224-gc2e197c0

root@aqs-desktop:/home/aqs/Desktop#


my_uhd_fft.py program is:

from gnuradio import uhd
from gnuradio import gr
from gnuradio.wxgui import stdgui2,fftsink2
import wx
class top_block(stdgui2.std_top_block):
  def __init__(self):
    self.addr=uhd.device_addr()
    self.u = uhd.usrp_source(self.addr,\
    uhd.io_type.COMPLEX_FLOAT32, 1)
    self.u.set_samp_rate(40000000)
    self.scope = fftsink2.fft_sink_c (panel, \
    512, 40000000)
    self.connect(self.u, self.scope)
if __name__ == '__main__()':
  app = stdgui2.stdapp(top_block,"FFT",nstatus=1)
  app.MainLoop()


Regards
Bilal Abbasi
Student
COMSATS Institute of information technology Pakistan.




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On 09/26/2012 01:52 AM, Bilal wrote:
>
>     self.u = uhd.usrp_source(self.addr,\
>     uhd.io_type.COMPLEX_FLOAT32, 1)
>     self.u.set_samp_rate(40000000)
>     self.scope = fftsink2.fft_sink_c (panel, \
>     512, 40000000)
>     self.connect(self.u, self.scope)
> if __name__ == '__main__()':
>   app = stdgui2.stdapp(top_block,"FFT",nstatus=1)
>   app.MainLoop()
>

I'm not 100% positive that the flow graph is actually started in this
case. I highly recommend that you put a similar application together in
GRC with USRP source and WX scope sink block. You will get nicely
generated code too!

-josh