From 6ece6f5212eaa62e8b789ea4d9f8e597a8a8672f Mon Sep 17 00:00:00 2001 From: mer0m Date: Thu, 16 Mar 2017 08:58:20 +0100 Subject: [PATCH] use resamplers instead LP --- fm_radio/fm_radio.grc | 217 ++++++++++++++++++++++++++------------------------ fm_radio/top_block.py | 181 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 295 insertions(+), 103 deletions(-) create mode 100755 fm_radio/top_block.py diff --git a/fm_radio/fm_radio.grc b/fm_radio/fm_radio.grc index 3aa68e5..7408b17 100644 --- a/fm_radio/fm_radio.grc +++ b/fm_radio/fm_radio.grc @@ -81,6 +81,33 @@ + + variable + + comment + + + + _enabled + True + + + _coordinate + (176, 160) + + + _rotation + 0 + + + id + decim + + + value + 4 + + variable_qtgui_range @@ -89,7 +116,7 @@ value - 100e6 + 98.7e6 _enabled @@ -168,7 +195,7 @@ value - 2e6 + 48e3 @@ -195,7 +222,7 @@ _coordinate - (624, 448) + (608, 448) _rotation @@ -215,7 +242,7 @@ quad_rate - 500e3 + samp_rate*10 @@ -242,7 +269,7 @@ _coordinate - (1032, 456) + (1104, 456) _rotation @@ -262,89 +289,14 @@ samp_rate - 48000 - - - - low_pass_filter - - beta - 6.76 - - - alias - - - - comment - - - - affinity - - - - cutoff_freq - 500e3 - - - decim - 4 - - - _enabled - True - - - type - fir_filter_ccf - - - _coordinate - (408, 408) - - - _rotation - 0 - - - gain - 1 - - - id - low_pass_filter_0 - - - interp - 1 - - - maxoutbuf - 0 - - - minoutbuf - 0 - - - samp_rate - samp_rate - - - width - 1e6 - - - win - firdes.WIN_HAMMING + int(samp_rate) qtgui_sink_x bw - samp_rate + samp_rate*10*4 alias @@ -368,7 +320,7 @@ _enabled - True + 0 fftsize @@ -376,7 +328,7 @@ _coordinate - (392, 584) + (392, 184) gui_hint @@ -443,7 +395,7 @@ qtgui_sink_x bw - samp_rate/4 + samp_rate/decim alias @@ -475,7 +427,7 @@ _coordinate - (632, 584) + (840, 176) gui_hint @@ -487,7 +439,7 @@ id - qtgui_sink_x_0_0 + qtgui_sink_x_1 maxoutbuf @@ -527,7 +479,7 @@ type - complex + float rate @@ -554,11 +506,11 @@ decim - 500 + 10 _enabled - True + 1 fbw @@ -566,7 +518,7 @@ _coordinate - (824, 432) + (848, 432) _rotation @@ -578,7 +530,7 @@ interp - 48 + 1 maxoutbuf @@ -597,6 +549,65 @@ fff + + rational_resampler_xxx + + alias + + + + comment + + + + affinity + + + + decim + 4 + + + _enabled + 1 + + + fbw + 0 + + + _coordinate + (400, 432) + + + _rotation + 0 + + + id + rational_resampler_xxx_0_0 + + + interp + 1 + + + maxoutbuf + 0 + + + minoutbuf + 0 + + + taps + + + + type + ccc + + rtlsdr_source @@ -1897,7 +1908,7 @@ _enabled - True + 1 _coordinate @@ -1997,7 +2008,7 @@ sample_rate - samp_rate + samp_rate*10*4 sync @@ -2006,37 +2017,37 @@ analog_wfm_rcv_0 - rational_resampler_xxx_0 + qtgui_sink_x_1 0 0 - low_pass_filter_0 - analog_wfm_rcv_0 + analog_wfm_rcv_0 + rational_resampler_xxx_0 0 0 - low_pass_filter_0 - qtgui_sink_x_0_0 + rational_resampler_xxx_0 + audio_sink_0 0 0 - rational_resampler_xxx_0 - audio_sink_0 + rational_resampler_xxx_0_0 + analog_wfm_rcv_0 0 0 rtlsdr_source_0 - low_pass_filter_0 + qtgui_sink_x_0 0 0 rtlsdr_source_0 - qtgui_sink_x_0 + rational_resampler_xxx_0_0 0 0 diff --git a/fm_radio/top_block.py b/fm_radio/top_block.py new file mode 100755 index 0000000..7823372 --- /dev/null +++ b/fm_radio/top_block.py @@ -0,0 +1,181 @@ +#!/usr/bin/env python2 +# -*- coding: utf-8 -*- +################################################## +# GNU Radio Python Flow Graph +# Title: Top Block +# Generated: Thu Mar 16 08:57:41 2017 +################################################## + +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 PyQt4 import Qt +from gnuradio import analog +from gnuradio import audio +from gnuradio import eng_notation +from gnuradio import filter +from gnuradio import gr +from gnuradio import qtgui +from gnuradio.eng_option import eng_option +from gnuradio.filter import firdes +from gnuradio.qtgui import Range, RangeWidget +from optparse import OptionParser +import osmosdr +import sip +import sys +import time + + +class top_block(gr.top_block, Qt.QWidget): + + def __init__(self): + gr.top_block.__init__(self, "Top Block") + Qt.QWidget.__init__(self) + self.setWindowTitle("Top Block") + 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", "top_block") + self.restoreGeometry(self.settings.value("geometry").toByteArray()) + + ################################################## + # Variables + ################################################## + self.samp_rate = samp_rate = 48e3 + self.freq = freq = 98.7e6 + self.decim = decim = 4 + + ################################################## + # Blocks + ################################################## + self._freq_range = Range(55e6, 200e6, 0.1e6, 98.7e6, 200) + self._freq_win = RangeWidget(self._freq_range, self.set_freq, "freq", "counter_slider", float) + self.top_grid_layout.addWidget(self._freq_win, 0,0) + self.rtlsdr_source_0 = osmosdr.source( args="numchan=" + str(1) + " " + '' ) + self.rtlsdr_source_0.set_sample_rate(samp_rate*10*4) + self.rtlsdr_source_0.set_center_freq(freq, 0) + self.rtlsdr_source_0.set_freq_corr(0, 0) + self.rtlsdr_source_0.set_dc_offset_mode(0, 0) + self.rtlsdr_source_0.set_iq_balance_mode(0, 0) + self.rtlsdr_source_0.set_gain_mode(False, 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_0 = filter.rational_resampler_ccc( + interpolation=1, + decimation=4, + taps=None, + fractional_bw=None, + ) + self.rational_resampler_xxx_0 = filter.rational_resampler_fff( + interpolation=1, + decimation=10, + taps=None, + fractional_bw=None, + ) + self.qtgui_sink_x_1 = qtgui.sink_f( + 1024, #fftsize + firdes.WIN_BLACKMAN_hARRIS, #wintype + 0, #fc + samp_rate/decim, #bw + "", #name + True, #plotfreq + True, #plotwaterfall + True, #plottime + True, #plotconst + ) + self.qtgui_sink_x_1.set_update_time(1.0/10) + self._qtgui_sink_x_1_win = sip.wrapinstance(self.qtgui_sink_x_1.pyqwidget(), Qt.QWidget) + self.top_grid_layout.addWidget(self._qtgui_sink_x_1_win, 10,0) + + self.qtgui_sink_x_1.enable_rf_freq(False) + + + + self.audio_sink_0 = audio.sink(int(samp_rate), '', True) + self.analog_wfm_rcv_0 = analog.wfm_rcv( + quad_rate=samp_rate*10, + audio_decimation=1, + ) + + ################################################## + # Connections + ################################################## + self.connect((self.analog_wfm_rcv_0, 0), (self.qtgui_sink_x_1, 0)) + self.connect((self.analog_wfm_rcv_0, 0), (self.rational_resampler_xxx_0, 0)) + self.connect((self.rational_resampler_xxx_0, 0), (self.audio_sink_0, 0)) + self.connect((self.rational_resampler_xxx_0_0, 0), (self.analog_wfm_rcv_0, 0)) + self.connect((self.rtlsdr_source_0, 0), (self.rational_resampler_xxx_0_0, 0)) + + def closeEvent(self, event): + self.settings = Qt.QSettings("GNU Radio", "top_block") + self.settings.setValue("geometry", self.saveGeometry()) + event.accept() + + def get_samp_rate(self): + return self.samp_rate + + def set_samp_rate(self, samp_rate): + self.samp_rate = samp_rate + self.rtlsdr_source_0.set_sample_rate(self.samp_rate*10*4) + self.qtgui_sink_x_1.set_frequency_range(0, self.samp_rate/self.decim) + + def get_freq(self): + return self.freq + + def set_freq(self, freq): + self.freq = freq + self.rtlsdr_source_0.set_center_freq(self.freq, 0) + + def get_decim(self): + return self.decim + + def set_decim(self, decim): + self.decim = decim + self.qtgui_sink_x_1.set_frequency_range(0, self.samp_rate/self.decim) + + +def main(top_block_cls=top_block, options=None): + + from distutils.version import StrictVersion + if StrictVersion(Qt.qVersion()) >= StrictVersion("4.5.0"): + 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 quitting(): + tb.stop() + tb.wait() + qapp.connect(qapp, Qt.SIGNAL("aboutToQuit()"), quitting) + qapp.exec_() + + +if __name__ == '__main__': + main() -- 2.16.4