Hello, All:
My program got Segmentation Fault. I used gdb to trace the process and got
the following return:
===============================================================
(gdb) continue
Continuing.
[New Thread -1223844944 (LWP 25403)]
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1223844944 (LWP 25403)]
0xb7706c79 in gr_vector_source_c::work (this=0x82bf1c8,
noutput_items=3968, [EMAIL PROTECTED], [EMAIL PROTECTED])
at gr_vector_source_c.cc:58
58 optr[i] = d_data[offset++];
Current language: auto; currently c++
(gdb)
==============================================================
Could anyone give some clues what is wrong with the vector?
Thanks a lot,
Xin
The python program
=========================================================
#!/usr/bin/env python
from gnuradio import gr
from gnuradio import usrp
from gnuradio import eng_notation
import os
print 'Blocked waiting for GDB attach (pid = %d)' % (os.getpid(),)
raw_input ('Press Enter to continue: ')
def build_graph (carrier=2.462e9):
interp = 16
duc0 = 5e6 # IF frequency
nchan = 1
fg = gr.flow_graph ()
dest = usrp.sink_c (0, interp, nchan)
sample_rate = dest.dac_freq() / interp
print "Sample rate = ", eng_notation.num_to_str (sample_rate)
dest.set_tx_freq (0, duc0)
dest.set_pga(0,20)
max = (2**15)-1
min = -max
vector = []
for i in range(40):
vector.append(complex(max,max))
vector.append(complex(max,min))
vector.append(complex(min,max))
vector.append(complex(min,min))
for i in range(60):
vector.append(complex(0,0))
src = gr.vector_source_c(vector,True)
fg.connect (src, dest)
dboard = usrp.selected_subdev(dest, (0,0))
print "Signal will generated by :", dboard.side_and_name()
rf = dest.tune(dboard._which, dboard, carrier)
if rf:
print "Carrier :", eng_notation.num_to_str(rf.baseband_freq)
else:
print "The range of the daugtherboard's frequency is :", \
eng_notation.num_to_str(dboard.freq_range()[0]), "-", \
eng_notation.num_to_str(dboard.freq_range()[1])
raise SystemExit
return fg
if __name__ == '__main__':
mygraph = build_graph ()
mygraph.start ()
raw_input ("Press Enter to quit : ")
mygraph.stop ()
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