#!/usr/bin/env python3 # -*- coding: utf-8 -*- # # SPDX-License-Identifier: GPL-3.0 # # GNU Radio Python Flow Graph # Title: FM Radio Receiver # GNU Radio version: 3.8.1.0 from distutils.version import StrictVersion 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()") from PyQt5 import Qt from gnuradio import qtgui from gnuradio.filter import firdes import sip from gnuradio import analog from gnuradio import audio from gnuradio import blocks from gnuradio import filter from gnuradio import gr import sys import signal from argparse import ArgumentParser from gnuradio.eng_arg import eng_float, intx from gnuradio import eng_notation from gnuradio.qtgui import Range, RangeWidget import osmosdr import time from gnuradio import qtgui class fm_radio(gr.top_block, Qt.QWidget): def __init__(self): gr.top_block.__init__(self, "FM Radio Receiver") Qt.QWidget.__init__(self) self.setWindowTitle("FM Radio Receiver") qtgui.util.check_set_qss() try: self.setWindowIcon(Qt.QIcon.fromTheme('gnuradio-grc')) except: pass self.top_scroll_layout = Qt.QVBoxLayout() self.setLayout(self.top_scroll_layout) self.top_scroll = Qt.QScrollArea() self.top_scroll.setFrameStyle(Qt.QFrame.NoFrame) self.top_scroll_layout.addWidget(self.top_scroll) self.top_scroll.setWidgetResizable(True) self.top_widget = Qt.QWidget() self.top_scroll.setWidget(self.top_widget) self.top_layout = Qt.QVBoxLayout(self.top_widget) self.top_grid_layout = Qt.QGridLayout() self.top_layout.addLayout(self.top_grid_layout) self.settings = Qt.QSettings("GNU Radio", "fm_radio") try: if StrictVersion(Qt.qVersion()) < StrictVersion("5.0.0"): self.restoreGeometry(self.settings.value("geometry").toByteArray()) else: self.restoreGeometry(self.settings.value("geometry")) except: pass ################################################## # Variables ################################################## self.volume = volume = 0.5 self.samp_rate = samp_rate = 2560000 self.frequency_mhz = frequency_mhz = 98.3 self.channel_width_hertz = channel_width_hertz = 250000 self.audio_sample_rate_hertz = audio_sample_rate_hertz = 48000 ################################################## # Blocks ################################################## self._volume_range = Range(0, 1, 0.05, 0.5, 200) self._volume_win = RangeWidget(self._volume_range, self.set_volume, 'Volume', "counter_slider", float) self.top_grid_layout.addWidget(self._volume_win) self._frequency_mhz_range = Range(87.5, 108, 0.1, 98.3, 200) self._frequency_mhz_win = RangeWidget(self._frequency_mhz_range, self.set_frequency_mhz, 'Frequency MHz', "counter_slider", float) self.top_grid_layout.addWidget(self._frequency_mhz_win) self.rtlsdr_source_0 = osmosdr.source( args="numchan=" + str(1) + " " + "" ) self.rtlsdr_source_0.set_time_unknown_pps(osmosdr.time_spec_t()) self.rtlsdr_source_0.set_sample_rate(samp_rate) self.rtlsdr_source_0.set_center_freq(frequency_mhz*1e6, 0) self.rtlsdr_source_0.set_freq_corr(0, 0) self.rtlsdr_source_0.set_gain(20, 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.rational_resampler_xxx_0 = filter.rational_resampler_fff( interpolation=audio_sample_rate_hertz, decimation=channel_width_hertz, taps=None, fractional_bw=None) self.qtgui_waterfall_sink_x_0 = qtgui.waterfall_sink_c( 1048, #size firdes.WIN_BLACKMAN_hARRIS, #wintype frequency_mhz*1e6, #fc samp_rate, #bw "", #name 1 #number of inputs ) self.qtgui_waterfall_sink_x_0.set_update_time(0.10) self.qtgui_waterfall_sink_x_0.enable_grid(False) self.qtgui_waterfall_sink_x_0.enable_axis_labels(True) labels = ['', '', '', '', '', '', '', '', '', ''] colors = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0] alphas = [1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0] for i in range(1): if len(labels[i]) == 0: self.qtgui_waterfall_sink_x_0.set_line_label(i, "Data {0}".format(i)) else: self.qtgui_waterfall_sink_x_0.set_line_label(i, labels[i]) self.qtgui_waterfall_sink_x_0.set_color_map(i, colors[i]) self.qtgui_waterfall_sink_x_0.set_line_alpha(i, alphas[i]) self.qtgui_waterfall_sink_x_0.set_intensity_range(-140, 10) self._qtgui_waterfall_sink_x_0_win = sip.wrapinstance(self.qtgui_waterfall_sink_x_0.pyqwidget(), Qt.QWidget) self.top_grid_layout.addWidget(self._qtgui_waterfall_sink_x_0_win) self.qtgui_freq_sink_x_0 = qtgui.freq_sink_f( 1024, #size firdes.WIN_BLACKMAN_hARRIS, #wintype 0, #fc channel_width_hertz, #bw "Demod Out", #name 1 ) self.qtgui_freq_sink_x_0.set_update_time(0.10) self.qtgui_freq_sink_x_0.set_y_axis(-140, 10) self.qtgui_freq_sink_x_0.set_y_label('Relative Gain', 'dB') self.qtgui_freq_sink_x_0.set_trigger_mode(qtgui.TRIG_MODE_FREE, 0.0, 0, "") self.qtgui_freq_sink_x_0.enable_autoscale(False) self.qtgui_freq_sink_x_0.enable_grid(False) self.qtgui_freq_sink_x_0.set_fft_average(1.0) self.qtgui_freq_sink_x_0.enable_axis_labels(True) self.qtgui_freq_sink_x_0.enable_control_panel(False) self.qtgui_freq_sink_x_0.disable_legend() self.qtgui_freq_sink_x_0.set_plot_pos_half(not True) labels = ['', '', '', '', '', '', '', '', '', ''] widths = [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] colors = ["blue", "red", "green", "black", "cyan", "magenta", "yellow", "dark red", "dark green", "dark blue"] alphas = [1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0] for i in range(1): if len(labels[i]) == 0: self.qtgui_freq_sink_x_0.set_line_label(i, "Data {0}".format(i)) else: self.qtgui_freq_sink_x_0.set_line_label(i, labels[i]) self.qtgui_freq_sink_x_0.set_line_width(i, widths[i]) self.qtgui_freq_sink_x_0.set_line_color(i, colors[i]) self.qtgui_freq_sink_x_0.set_line_alpha(i, alphas[i]) self._qtgui_freq_sink_x_0_win = sip.wrapinstance(self.qtgui_freq_sink_x_0.pyqwidget(), Qt.QWidget) self.top_grid_layout.addWidget(self._qtgui_freq_sink_x_0_win) self.low_pass_filter_0 = filter.fir_filter_ccf( int(samp_rate/channel_width_hertz), firdes.low_pass( 2, samp_rate, 100000, 10000, firdes.WIN_KAISER, 6.76)) self.blocks_multiply_const_vxx_0 = blocks.multiply_const_ff(volume) self.audio_sink_0 = audio.sink(audio_sample_rate_hertz, '', True) self.analog_wfm_rcv_0 = analog.wfm_rcv( quad_rate=channel_width_hertz, audio_decimation=1, ) ################################################## # Connections ################################################## self.connect((self.analog_wfm_rcv_0, 0), (self.qtgui_freq_sink_x_0, 0)) self.connect((self.analog_wfm_rcv_0, 0), (self.rational_resampler_xxx_0, 0)) self.connect((self.blocks_multiply_const_vxx_0, 0), (self.audio_sink_0, 0)) self.connect((self.low_pass_filter_0, 0), (self.analog_wfm_rcv_0, 0)) self.connect((self.rational_resampler_xxx_0, 0), (self.blocks_multiply_const_vxx_0, 0)) self.connect((self.rtlsdr_source_0, 0), (self.low_pass_filter_0, 0)) self.connect((self.rtlsdr_source_0, 0), (self.qtgui_waterfall_sink_x_0, 0)) def closeEvent(self, event): self.settings = Qt.QSettings("GNU Radio", "fm_radio") self.settings.setValue("geometry", self.saveGeometry()) event.accept() def get_volume(self): return self.volume def set_volume(self, volume): self.volume = volume self.blocks_multiply_const_vxx_0.set_k(self.volume) 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(2, self.samp_rate, 100000, 10000, firdes.WIN_KAISER, 6.76)) self.qtgui_waterfall_sink_x_0.set_frequency_range(self.frequency_mhz*1e6, self.samp_rate) self.rtlsdr_source_0.set_sample_rate(self.samp_rate) def get_frequency_mhz(self): return self.frequency_mhz def set_frequency_mhz(self, frequency_mhz): self.frequency_mhz = frequency_mhz self.qtgui_waterfall_sink_x_0.set_frequency_range(self.frequency_mhz*1e6, self.samp_rate) self.rtlsdr_source_0.set_center_freq(self.frequency_mhz*1e6, 0) def get_channel_width_hertz(self): return self.channel_width_hertz def set_channel_width_hertz(self, channel_width_hertz): self.channel_width_hertz = channel_width_hertz self.qtgui_freq_sink_x_0.set_frequency_range(0, self.channel_width_hertz) def get_audio_sample_rate_hertz(self): return self.audio_sample_rate_hertz def set_audio_sample_rate_hertz(self, audio_sample_rate_hertz): self.audio_sample_rate_hertz = audio_sample_rate_hertz def main(top_block_cls=fm_radio, options=None): if StrictVersion("4.5.0") <= StrictVersion(Qt.qVersion()) < StrictVersion("5.0.0"): style = gr.prefs().get_string('qtgui', 'style', 'raster') Qt.QApplication.setGraphicsSystem(style) qapp = Qt.QApplication(sys.argv) tb = top_block_cls() tb.start() tb.show() def sig_handler(sig=None, frame=None): Qt.QApplication.quit() signal.signal(signal.SIGINT, sig_handler) signal.signal(signal.SIGTERM, sig_handler) timer = Qt.QTimer() timer.start(500) timer.timeout.connect(lambda: None) def quitting(): tb.stop() tb.wait() qapp.aboutToQuit.connect(quitting) qapp.exec_() if __name__ == '__main__': main()