/
rds_rx.py
executable file
·264 lines (232 loc) · 11.1 KB
/
rds_rx.py
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#!/usr/bin/env python
##################################################
# Gnuradio Python Flow Graph
# Title: Stereo FM receiver and RDS Decoder
# Generated: Sun Nov 23 12:38:00 2014
##################################################
from gnuradio import analog
from gnuradio import blocks
from gnuradio import digital
from gnuradio import digital;import cmath
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 scopesink2
from grc_gnuradio import wxgui as grc_wxgui
from optparse import OptionParser
import math
import osmosdr
import rds
import wx
class rds_rx(grc_wxgui.top_block_gui):
def __init__(self):
grc_wxgui.top_block_gui.__init__(self, title="Stereo FM receiver and RDS Decoder")
##################################################
# Variables
##################################################
self.samp_rate = samp_rate = 1000000
self.bb_decim = bb_decim = 4
self.freq_offset = freq_offset = 250000
self.freq = freq = 101.5
self.baseband_rate = baseband_rate = samp_rate/bb_decim
self.audio_decim = audio_decim = 5
self.xlate_bandwidth = xlate_bandwidth = 100000
self.gain = gain = 20
self.freq_tune = freq_tune = freq - freq_offset
self.audio_rate = audio_rate = 48000
self.audio_decim_rate = audio_decim_rate = baseband_rate/audio_decim
##################################################
# Blocks
##################################################
self.nb = self.nb = wx.Notebook(self.GetWin(), style=wx.NB_TOP)
self.nb.AddPage(grc_wxgui.Panel(self.nb), "BB")
self.nb.AddPage(grc_wxgui.Panel(self.nb), "Demod")
self.nb.AddPage(grc_wxgui.Panel(self.nb), "L+R")
self.nb.AddPage(grc_wxgui.Panel(self.nb), "Pilot")
self.nb.AddPage(grc_wxgui.Panel(self.nb), "DSBSC")
self.nb.AddPage(grc_wxgui.Panel(self.nb), "RDS")
self.nb.AddPage(grc_wxgui.Panel(self.nb), "L-R")
self.nb.AddPage(grc_wxgui.Panel(self.nb), "RDS constellation")
self.nb.AddPage(grc_wxgui.Panel(self.nb), "Waterfall")
self.GridAdd(self.nb, 2, 0, 1, 2)
self.wxgui_scopesink2_1 = scopesink2.scope_sink_c(
self.nb.GetPage(7).GetWin(),
title="Scope Plot",
sample_rate=2375,
v_scale=0.4,
v_offset=0,
t_scale=0,
ac_couple=False,
xy_mode=True,
num_inputs=1,
trig_mode=wxgui.TRIG_MODE_AUTO,
y_axis_label="Counts",
)
self.nb.GetPage(7).Add(self.wxgui_scopesink2_1.win)
self.wxgui_fftsink2_0_0_0_1_0_1 = fftsink2.fft_sink_c(
self.nb.GetPage(5).GetWin(),
baseband_freq=0,
y_per_div=10,
y_divs=10,
ref_level=0,
ref_scale=2.0,
sample_rate=audio_rate,
fft_size=1024,
fft_rate=15,
average=False,
avg_alpha=None,
title="RDS",
peak_hold=False,
)
self.nb.GetPage(5).Add(self.wxgui_fftsink2_0_0_0_1_0_1.win)
self.wxgui_fftsink2_0 = fftsink2.fft_sink_c(
self.nb.GetPage(0).GetWin(),
baseband_freq=0,
y_per_div=10,
y_divs=10,
ref_level=-30,
ref_scale=2.0,
sample_rate=samp_rate,
fft_size=1024,
fft_rate=15,
average=True,
avg_alpha=0.8,
title="Baseband",
peak_hold=False,
)
self.nb.GetPage(0).Add(self.wxgui_fftsink2_0.win)
self.rtl_sdr_source0 = osmosdr.source( args="numchan=" + str(1) + " " + "" )
self.rtl_sdr_source0.set_sample_rate(samp_rate)
self.rtl_sdr_source0.set_center_freq(freq_tune, 0)
self.rtl_sdr_source0.set_freq_corr(0, 0)
self.rtl_sdr_source0.set_dc_offset_mode(0, 0)
self.rtl_sdr_source0.set_iq_balance_mode(0, 0)
self.rtl_sdr_source0.set_gain_mode(False, 0)
self.rtl_sdr_source0.set_gain(gain, 0)
self.rtl_sdr_source0.set_if_gain(20, 0)
self.rtl_sdr_source0.set_bb_gain(20, 0)
self.rtl_sdr_source0.set_antenna("", 0)
self.rtl_sdr_source0.set_bandwidth(0, 0)
self.root_raised_cosine_filter_0 = filter.fir_filter_ccf(1, firdes.root_raised_cosine(
1, samp_rate/bb_decim/audio_decim, 2375, 1, 100))
self.gr_rds_parser_0 = rds.parser(True, False)
self.gr_rds_panel_0 = rds.rdsPanel(freq, self.GetWin())
self.Add(self.gr_rds_panel_0.panel)
self.gr_rds_decoder_0 = rds.decoder(False, False)
self.freq_xlating_fir_filter_xxx_1 = filter.freq_xlating_fir_filter_fcc(audio_decim, (firdes.low_pass(2500.0,baseband_rate,2.4e3,2e3,firdes.WIN_HAMMING)), 57e3, baseband_rate)
self.freq_xlating_fir_filter_xxx_0 = filter.freq_xlating_fir_filter_ccc(1, (firdes.low_pass(1, samp_rate, xlate_bandwidth, 100000)), freq_offset, samp_rate)
self.digital_mpsk_receiver_cc_0 = digital.mpsk_receiver_cc(2, 0, 1*cmath.pi/100.0, -0.06, 0.06, 0.5, 0.05, samp_rate/bb_decim/audio_decim/ 2375.0, 0.001, 0.005)
self.digital_diff_decoder_bb_0 = digital.diff_decoder_bb(2)
self.digital_binary_slicer_fb_0 = digital.binary_slicer_fb()
self.blocks_keep_one_in_n_0 = blocks.keep_one_in_n(gr.sizeof_char*1, 2)
self.blocks_complex_to_real_0 = blocks.complex_to_real(1)
self.analog_wfm_rcv_0 = analog.wfm_rcv(
quad_rate=samp_rate,
audio_decimation=bb_decim,
)
##################################################
# Connections
##################################################
self.connect((self.freq_xlating_fir_filter_xxx_0, 0), (self.wxgui_fftsink2_0, 0))
self.connect((self.freq_xlating_fir_filter_xxx_0, 0), (self.analog_wfm_rcv_0, 0))
self.connect((self.analog_wfm_rcv_0, 0), (self.freq_xlating_fir_filter_xxx_1, 0))
self.connect((self.freq_xlating_fir_filter_xxx_1, 0), (self.wxgui_fftsink2_0_0_0_1_0_1, 0))
self.connect((self.digital_mpsk_receiver_cc_0, 0), (self.wxgui_scopesink2_1, 0))
self.connect((self.freq_xlating_fir_filter_xxx_1, 0), (self.root_raised_cosine_filter_0, 0))
self.connect((self.root_raised_cosine_filter_0, 0), (self.digital_mpsk_receiver_cc_0, 0))
self.connect((self.digital_mpsk_receiver_cc_0, 0), (self.blocks_complex_to_real_0, 0))
self.connect((self.digital_binary_slicer_fb_0, 0), (self.blocks_keep_one_in_n_0, 0))
self.connect((self.blocks_complex_to_real_0, 0), (self.digital_binary_slicer_fb_0, 0))
self.connect((self.blocks_keep_one_in_n_0, 0), (self.digital_diff_decoder_bb_0, 0))
self.connect((self.rtl_sdr_source0, 0), (self.freq_xlating_fir_filter_xxx_0, 0))
self.connect((self.digital_diff_decoder_bb_0, 0), (self.gr_rds_decoder_0, 0))
##################################################
# Asynch Message Connections
##################################################
self.msg_connect(self.gr_rds_decoder_0, "out", self.gr_rds_parser_0, "in")
self.msg_connect(self.gr_rds_parser_0, "out", self.gr_rds_panel_0, "in")
def get_samp_rate(self):
return self.samp_rate
def set_samp_rate(self, samp_rate):
self.samp_rate = samp_rate
self.set_baseband_rate(self.samp_rate/self.bb_decim)
self.wxgui_fftsink2_0.set_sample_rate(self.samp_rate)
self.freq_xlating_fir_filter_xxx_0.set_taps((firdes.low_pass(1, self.samp_rate, self.xlate_bandwidth, 100000)))
self.rtl_sdr_source0.set_sample_rate(self.samp_rate)
self.root_raised_cosine_filter_0.set_taps(firdes.root_raised_cosine(1, self.samp_rate/self.bb_decim/self.audio_decim, 2375, 1, 100))
self.digital_mpsk_receiver_cc_0.set_omega(self.samp_rate/self.bb_decim/self.audio_decim/ 2375.0)
def get_bb_decim(self):
return self.bb_decim
def set_bb_decim(self, bb_decim):
self.bb_decim = bb_decim
self.set_baseband_rate(self.samp_rate/self.bb_decim)
self.root_raised_cosine_filter_0.set_taps(firdes.root_raised_cosine(1, self.samp_rate/self.bb_decim/self.audio_decim, 2375, 1, 100))
self.digital_mpsk_receiver_cc_0.set_omega(self.samp_rate/self.bb_decim/self.audio_decim/ 2375.0)
def get_freq_offset(self):
return self.freq_offset
def set_freq_offset(self, freq_offset):
self.freq_offset = freq_offset
self.set_freq_tune(self.freq - self.freq_offset)
self.freq_xlating_fir_filter_xxx_0.set_center_freq(self.freq_offset)
def get_freq(self):
return self.freq
def set_freq(self, freq):
self.freq = freq
self.set_freq_tune(self.freq - self.freq_offset)
self.gr_rds_panel_0.set_frequency(self.freq);
def get_baseband_rate(self):
return self.baseband_rate
def set_baseband_rate(self, baseband_rate):
self.baseband_rate = baseband_rate
self.set_audio_decim_rate(self.baseband_rate/self.audio_decim)
self.freq_xlating_fir_filter_xxx_1.set_taps((firdes.low_pass(2500.0,self.baseband_rate,2.4e3,2e3,firdes.WIN_HAMMING)))
def get_audio_decim(self):
return self.audio_decim
def set_audio_decim(self, audio_decim):
self.audio_decim = audio_decim
self.set_audio_decim_rate(self.baseband_rate/self.audio_decim)
self.root_raised_cosine_filter_0.set_taps(firdes.root_raised_cosine(1, self.samp_rate/self.bb_decim/self.audio_decim, 2375, 1, 100))
self.digital_mpsk_receiver_cc_0.set_omega(self.samp_rate/self.bb_decim/self.audio_decim/ 2375.0)
def get_xlate_bandwidth(self):
return self.xlate_bandwidth
def set_xlate_bandwidth(self, xlate_bandwidth):
self.xlate_bandwidth = xlate_bandwidth
self.freq_xlating_fir_filter_xxx_0.set_taps((firdes.low_pass(1, self.samp_rate, self.xlate_bandwidth, 100000)))
def get_gain(self):
return self.gain
def set_gain(self, gain):
self.gain = gain
self.rtl_sdr_source0.set_gain(self.gain, 0)
def get_freq_tune(self):
return self.freq_tune
def set_freq_tune(self, freq_tune):
self.freq_tune = freq_tune
self.rtl_sdr_source0.set_center_freq(self.freq_tune, 0)
def get_audio_rate(self):
return self.audio_rate
def set_audio_rate(self, audio_rate):
self.audio_rate = audio_rate
self.wxgui_fftsink2_0_0_0_1_0_1.set_sample_rate(self.audio_rate)
def get_audio_decim_rate(self):
return self.audio_decim_rate
def set_audio_decim_rate(self, audio_decim_rate):
self.audio_decim_rate = audio_decim_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 = rds_rx()
tb.Start(True)
tb.Wait()