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fm_tuner.py
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fm_tuner.py
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#!/usr/bin/env python
##################################################
# Gnuradio Python Flow Graph
# Title: Fm Tuner
# Generated: Sun Mar 6 11:32:33 2016
##################################################
from gnuradio import analog
from gnuradio import eng_notation
from gnuradio import filter
from gnuradio import gr
from gnuradio import wxgui
from gnuradio.eng_option import eng_option
from gnuradio.fft import window
from gnuradio.filter import firdes
from gnuradio.wxgui import fftsink2
from gnuradio.wxgui import forms
from grc_gnuradio import wxgui as grc_wxgui
from optparse import OptionParser
import osmosdr
import threading
import time
import wx
class fm_tuner(grc_wxgui.top_block_gui):
def __init__(self):
grc_wxgui.top_block_gui.__init__(self, title="Fm Tuner")
_icon_path = "/usr/share/icons/hicolor/32x32/apps/gnuradio-grc.png"
self.SetIcon(wx.Icon(_icon_path, wx.BITMAP_TYPE_ANY))
##################################################
# Variables
##################################################
self.tuning_frequency = tuning_frequency = 90.5e6
self.volume = volume = 1
self.transition = transition = 500000
self.samp_rate = samp_rate = 2000000
self.quadrature = quadrature = 500000
self.low_cutoff = low_cutoff = tuning_frequency-0.1e6
self.high_cutoff = high_cutoff = tuning_frequency+0.1e6
self.frequency = frequency = tuning_frequency
self.cutoff = cutoff = 100000
self.center_freq_probe = center_freq_probe = 0
self.ave_mag_probe = ave_mag_probe = 0
self.audio_decimation = audio_decimation = 10
##################################################
# Blocks
##################################################
self.rtlsdr_source_0 = osmosdr.source( args="numchan=" + str(1) + " " + "" )
self.rtlsdr_source_0.set_sample_rate(samp_rate)
self.rtlsdr_source_0.set_center_freq(tuning_frequency, 0)
self.rtlsdr_source_0.set_freq_corr(0, 0)
self.rtlsdr_source_0.set_dc_offset_mode(2, 0)
self.rtlsdr_source_0.set_iq_balance_mode(0, 0)
self.rtlsdr_source_0.set_gain_mode(1, 0)
self.rtlsdr_source_0.set_gain(25, 0)
self.rtlsdr_source_0.set_if_gain(20, 0)
self.rtlsdr_source_0.set_bb_gain(20, 0)
self.rtlsdr_source_0.set_antenna("", 0)
self.rtlsdr_source_0.set_bandwidth(0, 0)
self.analog_probe_avg_mag_sqrd_x_0 = analog.probe_avg_mag_sqrd_c(0, 1)
self.wxgui_fftsink2_0 = fftsink2.fft_sink_c(
self.GetWin(),
baseband_freq=0,
y_per_div=10,
y_divs=10,
ref_level=0,
ref_scale=2.0,
sample_rate=samp_rate,
fft_size=1024,
fft_rate=15,
average=False,
avg_alpha=None,
title="FFT Plot",
peak_hold=False,
)
self.Add(self.wxgui_fftsink2_0.win)
self.rational_resampler_xxx_0 = filter.rational_resampler_ccc(
interpolation=1,
decimation=4,
taps=None,
fractional_bw=None,
)
self.low_pass_filter_0 = filter.fir_filter_ccf(1, firdes.low_pass(
1, samp_rate, cutoff, transition, firdes.WIN_HAMMING, 6.76))
_frequency_sizer = wx.BoxSizer(wx.VERTICAL)
self._frequency_text_box = forms.text_box(
parent=self.GetWin(),
sizer=_frequency_sizer,
value=self.frequency,
callback=self.set_frequency,
label='frequency',
converter=forms.float_converter(),
proportion=0,
)
self._frequency_slider = forms.slider(
parent=self.GetWin(),
sizer=_frequency_sizer,
value=self.frequency,
callback=self.set_frequency,
minimum=88e6,
maximum=110e6,
num_steps=100,
style=wx.SL_HORIZONTAL,
cast=float,
proportion=1,
)
self.Add(_frequency_sizer)
def _center_freq_probe_probe():
while True:
val = self.rtlsdr_source_0.get_center_freq()
try: self.set_center_freq_probe(val)
except AttributeError, e: pass
time.sleep(1.0/(10))
_center_freq_probe_thread = threading.Thread(target=_center_freq_probe_probe)
_center_freq_probe_thread.daemon = True
_center_freq_probe_thread.start()
def _ave_mag_probe_probe():
while True:
val = self.analog_probe_avg_mag_sqrd_x_0.level()
try: self.set_ave_mag_probe(val)
except AttributeError, e: pass
time.sleep(1.0/(10))
_ave_mag_probe_thread = threading.Thread(target=_ave_mag_probe_probe)
_ave_mag_probe_thread.daemon = True
_ave_mag_probe_thread.start()
self.analog_simple_squelch_cc_0 = analog.simple_squelch_cc(-60, 1)
##################################################
# Connections
##################################################
self.connect((self.rtlsdr_source_0, 0), (self.rational_resampler_xxx_0, 0))
self.connect((self.rational_resampler_xxx_0, 0), (self.low_pass_filter_0, 0))
self.connect((self.low_pass_filter_0, 0), (self.analog_simple_squelch_cc_0, 0))
self.connect((self.analog_simple_squelch_cc_0, 0), (self.wxgui_fftsink2_0, 0))
self.connect((self.analog_simple_squelch_cc_0, 0), (self.analog_probe_avg_mag_sqrd_x_0, 0))
# QT sink close method reimplementation
def get_tuning_frequency(self):
return self.tuning_frequency
def set_tuning_frequency(self, tuning_frequency):
self.tuning_frequency = tuning_frequency
self.set_high_cutoff(self.tuning_frequency+0.1e6)
self.set_low_cutoff(self.tuning_frequency-0.1e6)
self.set_frequency(self.tuning_frequency)
self.rtlsdr_source_0.set_center_freq(self.tuning_frequency, 0)
self.rtlsdr_source_0.set_center_freq(self.tuning_frequency, 1)
def get_volume(self):
return self.volume
def set_volume(self, volume):
self.volume = volume
def get_transition(self):
return self.transition
def set_transition(self, transition):
self.transition = transition
self.low_pass_filter_0.set_taps(firdes.low_pass(1, self.samp_rate, self.cutoff, self.transition, firdes.WIN_HAMMING, 6.76))
def get_samp_rate(self):
return self.samp_rate
def set_samp_rate(self, samp_rate):
self.samp_rate = samp_rate
self.low_pass_filter_0.set_taps(firdes.low_pass(1, self.samp_rate, self.cutoff, self.transition, firdes.WIN_HAMMING, 6.76))
self.rtlsdr_source_0.set_sample_rate(self.samp_rate)
self.wxgui_fftsink2_0.set_sample_rate(self.samp_rate)
def get_quadrature(self):
return self.quadrature
def set_quadrature(self, quadrature):
self.quadrature = quadrature
def get_low_cutoff(self):
return self.low_cutoff
def set_low_cutoff(self, low_cutoff):
self.low_cutoff = low_cutoff
def get_high_cutoff(self):
return self.high_cutoff
def set_high_cutoff(self, high_cutoff):
self.high_cutoff = high_cutoff
def get_frequency(self):
return self.frequency
def set_frequency(self, frequency):
self.frequency = frequency
self._frequency_slider.set_value(self.frequency)
self._frequency_text_box.set_value(self.frequency)
def get_cutoff(self):
return self.cutoff
def set_cutoff(self, cutoff):
self.cutoff = cutoff
self.low_pass_filter_0.set_taps(firdes.low_pass(1, self.samp_rate, self.cutoff, self.transition, firdes.WIN_HAMMING, 6.76))
def get_center_freq_probe(self):
return self.center_freq_probe
def set_center_freq_probe(self, center_freq_probe):
self.center_freq_probe = center_freq_probe
def get_ave_mag_probe(self):
return self.ave_mag_probe
def set_ave_mag_probe(self, ave_mag_probe):
self.ave_mag_probe = ave_mag_probe
def get_audio_decimation(self):
return self.audio_decimation
def set_audio_decimation(self, audio_decimation):
self.audio_decimation = audio_decimation
if __name__ == '__main__':
import ctypes
import os
if os.name == 'posix':
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 = fm_tuner()
tb.Start(True)
tb.Wait()