I am testing some blocks to understand the synchronization in ofdm . I
edited c++ files & put std::cout for all variables in
frequency_modulator_fc_impl.cc and multiply_cc_impl.cc and then I rebuilt
using cmake../ then make then sudo make install . But when I run the
python file "./top_block.py" I got an empty output from vector sinks also
I got only the values of variables in multiply_cc_impl.cc on terminal . so
why the values of variables of frequency_modulator_fc_impl.cc aren't shown
on terminal ?!!!!!!!
Thanks.
Here is the python file
#!/usr/bin/env python
##################################################
# Gnuradio Python Flow Graph
# Title: Top Block
# Generated: Wed Apr 23 05:43:13 2014
##################################################
from gnuradio import blocks
from gnuradio import eng_notation
from gnuradio import gr
from gnuradio.eng_option import eng_option
from gnuradio.filter import firdes
from grc_gnuradio import wxgui as grc_wxgui
from optparse import OptionParser
import wx
from gnuradio import digital
from gnuradio import analog
class top_block(grc_wxgui.top_block_gui):
def __init__(self):
grc_wxgui.top_block_gui.__init__(self, title="Top Block")
##################################################
# Variables
##################################################
self.samp_rate = samp_rate = 32000
fft_len=512
cp_len=128
n_sync_words=1
frame_length_tag_key = "frame_length"
##################################################
# Blocks
##################################################
self.blocks_vector_source_x_0 = blocks.vector_source_c((1, 1,
1,0,0,0,1,0,1), False, 1, [])
self.sync_detect = digital.ofdm_sync_sc_cfb(fft_len, cp_len)
self.delay = blocks.delay(gr.sizeof_gr_complex, fft_len+cp_len)
self.oscillator = analog.frequency_modulator_fc(-2.0 / fft_len)
self.mixer = blocks.multiply_cc()
self.hpd = digital.header_payload_demux(
n_sync_words+1, # Number of OFDM symbols before payload
(sync + 1 sym header)
fft_len, cp_len, # FFT length, guard interval
frame_length_tag_key, # Frame length tag key
"", # We're not using trigger tags
True # One output item is one OFDM symbol
(False would output complex scalars)
)
self.blocks_vector_sink_x_0 = blocks.vector_sink_b(4096)
self.blocks_vector_sink_x_1 = blocks.vector_sink_b(4096)
##################################################
# Connections
##################################################
self.connect((self.blocks_vector_source_x_0, 0), (self.sync_detect))
self.connect((self.blocks_vector_source_x_0, 0), self.delay,
(self.mixer, 0), (self.hpd, 0), (self.blocks_vector_sink_x_0, 0))
self.connect((self.sync_detect, 0), self.oscillator, (self.mixer,
1))
self.connect((self.sync_detect, 1), (self.hpd,
1),(self.blocks_vector_sink_x_1, 0))
#if debug_log:
# self.connect((sync_detect, 0),
blocks.file_sink(gr.sizeof_float, 'freq-offset.dat'))
# self.connect((sync_detect, 1),
blocks.file_sink(gr.sizeof_char, 'sync-detect.dat'))
# QT sink close method reimplementation
def get_samp_rate(self):
return self.samp_rate
def set_samp_rate(self, samp_rate):
self.samp_rate = samp_rate
if __name__ == '__main__':
import ctypes
import sys
if sys.platform.startswith('linux'):
try:
x11 = ctypes.cdll.LoadLibrary('libX11.so')
x11.XInitThreads()
except:
print "Warning: failed to XInitThreads()"
parser = OptionParser(option_class=eng_option, usage="%prog: [options]")
(options, args) = parser.parse_args()
tb = top_block()
tb.Start(True)
tb.Wait()
print tb.blocks_vector_sink_x_0.data()
print tb.blocks_vector_sink_x_1.data()
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