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

[email protected]:/home/aqs/Desktop# python my_uhd_fft.py
linux; GNU C++ version 4.4.3; Boost_104000;
UHD_003.004.003-224-gc2e197c0

[email protected]:/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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Sent from the GnuRadio mailing list archive at Nabble.com.

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

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