Multiple stations FM transmitter using gnuradio
From Opendigitalradio
Python code
#!/usr/bin/env python ################################################## # Gnuradio Python Flow Graph # Title: Multiple stations FM transmitter # Author: Mathias Coinchon # Generated: Sat Jan 2 21:19:02 2010 ################################################## from gnuradio import blks2 from gnuradio import gr from gnuradio.eng_option import eng_option from gnuradio.gr import firdes from gnuradio.wxgui import fftsink2 from gnuradio.wxgui import forms from grc_gnuradio import usrp as grc_usrp from grc_gnuradio import wxgui as grc_wxgui from optparse import OptionParser import wx class multistations_FM_TX(grc_wxgui.top_block_gui): def __init__(self): grc_wxgui.top_block_gui.__init__(self, title="Multiple stations FM transmitter") ################################################## # Variables ################################################## self.samp_rate = samp_rate = 32000 self.quad_rate = quad_rate = 1280000 self.carrier2_frequency = carrier2_frequency = 300000 self.carrier1_frequency = carrier1_frequency = -300000 self.FM_frequency = FM_frequency = 107600000 ################################################## # Controls ################################################## _carrier2_frequency_sizer = wx.BoxSizer(wx.VERTICAL) self._carrier2_frequency_text_box = forms.text_box( parent=self.GetWin(), sizer=_carrier2_frequency_sizer, value=self.carrier2_frequency, callback=self.set_carrier2_frequency, label="Carrier 2 Frequency", converter=forms.float_converter(), proportion=0, ) self._carrier2_frequency_slider = forms.slider( parent=self.GetWin(), sizer=_carrier2_frequency_sizer, value=self.carrier2_frequency, callback=self.set_carrier2_frequency, minimum=-500000, maximum=500000, num_steps=100, style=wx.SL_HORIZONTAL, cast=float, proportion=1, ) self.Add(_carrier2_frequency_sizer) _carrier1_frequency_sizer = wx.BoxSizer(wx.VERTICAL) self._carrier1_frequency_text_box = forms.text_box( parent=self.GetWin(), sizer=_carrier1_frequency_sizer, value=self.carrier1_frequency, callback=self.set_carrier1_frequency, label="Carrier 1 Frequency", converter=forms.float_converter(), proportion=0, ) self._carrier1_frequency_slider = forms.slider( parent=self.GetWin(), sizer=_carrier1_frequency_sizer, value=self.carrier1_frequency, callback=self.set_carrier1_frequency, minimum=-500000, maximum=500000, num_steps=100, style=wx.SL_HORIZONTAL, cast=float, proportion=1, ) self.Add(_carrier1_frequency_sizer) _FM_frequency_sizer = wx.BoxSizer(wx.VERTICAL) self._FM_frequency_text_box = forms.text_box( parent=self.GetWin(), sizer=_FM_frequency_sizer, value=self.FM_frequency, callback=self.set_FM_frequency, label="Central FM frequency", converter=forms.float_converter(), proportion=0, ) self._FM_frequency_slider = forms.slider( parent=self.GetWin(), sizer=_FM_frequency_sizer, value=self.FM_frequency, callback=self.set_FM_frequency, minimum=87500000, maximum=108000000, num_steps=205, style=wx.SL_HORIZONTAL, cast=float, proportion=1, ) self.Add(_FM_frequency_sizer) ################################################## # Blocks ################################################## self.blks2_rational_resampler_xxx_0 = blks2.rational_resampler_ccc( interpolation=4, decimation=1, taps=None, fractional_bw=None, ) self.blks2_rational_resampler_xxx_1 = blks2.rational_resampler_ccc( interpolation=4, decimation=1, taps=None, fractional_bw=None, ) self.blks2_rational_resampler_xxx_2 = blks2.rational_resampler_ccc( interpolation=4, decimation=1, taps=None, fractional_bw=None, ) self.blks2_wfm_tx_0 = blks2.wfm_tx( audio_rate=samp_rate, quad_rate=320000, tau=50e-6, max_dev=75e3, ) self.blks2_wfm_tx_1 = blks2.wfm_tx( audio_rate=samp_rate, quad_rate=320000, tau=75e-6, max_dev=75e3, ) self.blks2_wfm_tx_2 = blks2.wfm_tx( audio_rate=samp_rate, quad_rate=320000, tau=75e-6, max_dev=75e3, ) self.gr_add_xx_0 = gr.add_vcc(1) self.gr_file_source_0 = gr.file_source(gr.sizeof_short*1, "/home/mc/FM_demo/lemixx.fifo", True) self.gr_file_source_1 = gr.file_source(gr.sizeof_short*1, "/home/mc/FM_demo/banane.fifo", True) self.gr_file_source_2 = gr.file_source(gr.sizeof_short*1, "/home/mc/FM_demo/stream_32k.fifo", True) self.gr_multiply_const_vxx_0 = gr.multiply_const_vcc((5000, )) self.gr_multiply_const_vxx_1 = gr.multiply_const_vff((30e-6, )) self.gr_multiply_const_vxx_1_0 = gr.multiply_const_vff((30e-6, )) self.gr_multiply_const_vxx_1_1 = gr.multiply_const_vff((30e-6, )) self.gr_multiply_xx_0 = gr.multiply_vcc(1) self.gr_multiply_xx_1 = gr.multiply_vcc(1) self.gr_short_to_float_0 = gr.short_to_float() self.gr_short_to_float_0_0 = gr.short_to_float() self.gr_short_to_float_0_0_0 = gr.short_to_float() self.gr_sig_source_x_0 = gr.sig_source_c(quad_rate, gr.GR_COS_WAVE, carrier1_frequency, 1, 0) self.gr_sig_source_x_1 = gr.sig_source_c(quad_rate, gr.GR_COS_WAVE, carrier2_frequency, 1, 0) self.usrp_simple_sink_x_0 = grc_usrp.simple_sink_c(which=0, side="B") self.usrp_simple_sink_x_0.set_interp_rate(100) self.usrp_simple_sink_x_0.set_frequency(-FM_frequency, verbose=True) self.usrp_simple_sink_x_0.set_gain(0) self.wxgui_fftsink2_0 = fftsink2.fft_sink_c( self.GetWin(), baseband_freq=0, y_per_div=10, y_divs=10, ref_level=50, sample_rate=quad_rate, fft_size=1024, fft_rate=30, average=False, avg_alpha=None, title="FFT Plot", peak_hold=False, ) self.Add(self.wxgui_fftsink2_0.win) ################################################## # Connections ################################################## self.connect((self.gr_multiply_const_vxx_0, 0), (self.usrp_simple_sink_x_0, 0)) self.connect((self.gr_multiply_xx_0, 0), (self.gr_add_xx_0, 0)) self.connect((self.gr_add_xx_0, 0), (self.gr_multiply_const_vxx_0, 0)) self.connect((self.gr_add_xx_0, 0), (self.wxgui_fftsink2_0, 0)) self.connect((self.blks2_rational_resampler_xxx_0, 0), (self.gr_add_xx_0, 1)) self.connect((self.gr_multiply_xx_1, 0), (self.gr_add_xx_0, 2)) self.connect((self.gr_sig_source_x_1, 0), (self.gr_multiply_xx_1, 1)) self.connect((self.gr_sig_source_x_0, 0), (self.gr_multiply_xx_0, 0)) self.connect((self.blks2_rational_resampler_xxx_2, 0), (self.gr_multiply_xx_0, 1)) self.connect((self.blks2_rational_resampler_xxx_1, 0), (self.gr_multiply_xx_1, 0)) self.connect((self.blks2_wfm_tx_0, 0), (self.blks2_rational_resampler_xxx_2, 0)) self.connect((self.blks2_wfm_tx_2, 0), (self.blks2_rational_resampler_xxx_0, 0)) self.connect((self.blks2_wfm_tx_1, 0), (self.blks2_rational_resampler_xxx_1, 0)) self.connect((self.gr_short_to_float_0, 0), (self.gr_multiply_const_vxx_1, 0)) self.connect((self.gr_file_source_1, 0), (self.gr_short_to_float_0, 0)) self.connect((self.gr_file_source_2, 0), (self.gr_short_to_float_0_0, 0)) self.connect((self.gr_file_source_0, 0), (self.gr_short_to_float_0_0_0, 0)) self.connect((self.gr_short_to_float_0_0, 0), (self.gr_multiply_const_vxx_1_0, 0)) self.connect((self.gr_short_to_float_0_0_0, 0), (self.gr_multiply_const_vxx_1_1, 0)) self.connect((self.gr_multiply_const_vxx_1, 0), (self.blks2_wfm_tx_1, 0)) self.connect((self.gr_multiply_const_vxx_1_0, 0), (self.blks2_wfm_tx_2, 0)) self.connect((self.gr_multiply_const_vxx_1_1, 0), (self.blks2_wfm_tx_0, 0)) def set_samp_rate(self, samp_rate): self.samp_rate = samp_rate def set_quad_rate(self, quad_rate): self.quad_rate = quad_rate self.wxgui_fftsink2_0.set_sample_rate(self.quad_rate) self.gr_sig_source_x_0.set_sampling_freq(self.quad_rate) self.gr_sig_source_x_1.set_sampling_freq(self.quad_rate) def set_carrier2_frequency(self, carrier2_frequency): self.carrier2_frequency = carrier2_frequency self._carrier2_frequency_slider.set_value(self.carrier2_frequency) self._carrier2_frequency_text_box.set_value(self.carrier2_frequency) self.gr_sig_source_x_1.set_frequency(self.carrier2_frequency) def set_carrier1_frequency(self, carrier1_frequency): self.carrier1_frequency = carrier1_frequency self._carrier1_frequency_slider.set_value(self.carrier1_frequency) self._carrier1_frequency_text_box.set_value(self.carrier1_frequency) self.gr_sig_source_x_0.set_frequency(self.carrier1_frequency) def set_FM_frequency(self, FM_frequency): self.FM_frequency = FM_frequency self._FM_frequency_slider.set_value(self.FM_frequency) self._FM_frequency_text_box.set_value(self.FM_frequency) self.usrp_simple_sink_x_0.set_frequency(-self.FM_frequency) if __name__ == '__main__': parser = OptionParser(option_class=eng_option, usage="%prog: [options]") (options, args) = parser.parse_args() tb = multistations_FM_TX() tb.Run(True)
