FM Transmitter with GNU Radio Python Code

FM Transmitter

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 gnuradio import analog
from gnuradio import blocks
from gnuradio import eng_notation
from gnuradio import filter
from gnuradio import gr
from gnuradio import uhd
from gnuradio import wxgui
from gnuradio.eng_option import eng_option
from gnuradio.filter import firdes
from gnuradio.wxgui import forms
from gnuradio.wxgui import scopesink2
from grc_gnuradio import wxgui as grc_wxgui
from optparse import OptionParser
import time
import wx


class Fm_transmitter(grc_wxgui.top_block_gui):

    def __init__(self):
        grc_wxgui.top_block_gui.__init__(self, title="Fm Transmitter")
        _icon_path = "C:\Program Files\GNURadio-3.7\share\icons\hicolor\48x48/apps\gnuradio-grc.png"
        self.SetIcon(wx.Icon(_icon_path, wx.BITMAP_TYPE_ANY))

        ##################################################
        # Variables
        ##################################################
        self.samp_rate_0 = samp_rate_0 = 4000000
        self.samp_rate = samp_rate = 192000
        self.gain = gain = 50

        ##################################################
        # Blocks
        ##################################################
        _gain_sizer = wx.BoxSizer(wx.VERTICAL)
        self._gain_text_box = forms.text_box(
        parent=self.GetWin(),
        sizer=_gain_sizer,
        value=self.gain,
        callback=self.set_gain,
        label='gain',
        converter=forms.float_converter(),
        proportion=0,
        )
        self._gain_slider = forms.slider(
        parent=self.GetWin(),
        sizer=_gain_sizer,
        value=self.gain,
        callback=self.set_gain,
        minimum=0,
        maximum=100,
        num_steps=100,
        style=wx.SL_HORIZONTAL,
        cast=float,
        proportion=1,
        )
        self.Add(_gain_sizer)
        self.wxgui_scopesink2_0 = scopesink2.scope_sink_c(
        self.GetWin(),
        title="Channel_input",
        sample_rate=samp_rate_0,
        v_scale=0,
        v_offset=0,
        t_scale=0,
        ac_couple=False,
        xy_mode=False,
        num_inputs=1,
        trig_mode=wxgui.TRIG_MODE_AUTO,
        y_axis_label="Counts",
        )
        self.Add(self.wxgui_scopesink2_0.win)
        self.uhd_usrp_sink_0 = uhd.usrp_sink(
        ",".join(("", "")),
        uhd.stream_args(
        cpu_format="fc32",
        channels=range(1),
        ),
        )
        self.uhd_usrp_sink_0.set_samp_rate(4000000)
        self.uhd_usrp_sink_0.set_center_freq(200000000, 0)
        self.uhd_usrp_sink_0.set_gain(gain, 0)
        self.uhd_usrp_sink_0.set_antenna("TX/RX", 0)
        self.rational_resampler_xxx_0 = filter.rational_resampler_ccc(
                interpolation=samp_rate_0,
                decimation=192000,
                taps=None,
                fractional_bw=None,
        )
        self.blocks_wavfile_source_0 = blocks.wavfile_source("/Users/gunaratr/Downloads/Hanthana Sihine - W. D. Amaradeva ft Umaria New Sinhala Song Releases 2014.wav", True)
        self.blocks_throttle_0 = blocks.throttle(gr.sizeof_gr_complex*1, samp_rate_0,True)
        self.analog_wfm_tx_0 = analog.wfm_tx(
        audio_rate=48000,
        quad_rate=192000,
        tau=75e-6,
        max_dev=75e3,
        )

        ##################################################
        # Connections
        ##################################################
        self.connect((self.analog_wfm_tx_0, 0), (self.rational_resampler_xxx_0, 0))  
        self.connect((self.blocks_throttle_0, 0), (self.uhd_usrp_sink_0, 0))  
        self.connect((self.blocks_throttle_0, 0), (self.wxgui_scopesink2_0, 0))  
        self.connect((self.blocks_wavfile_source_0, 0), (self.analog_wfm_tx_0, 0))  
        self.connect((self.rational_resampler_xxx_0, 0), (self.blocks_throttle_0, 0))  

    def get_samp_rate_0(self):
        return self.samp_rate_0

    def set_samp_rate_0(self, samp_rate_0):
        self.samp_rate_0 = samp_rate_0
        self.blocks_throttle_0.set_sample_rate(self.samp_rate_0)
        self.wxgui_scopesink2_0.set_sample_rate(self.samp_rate_0)

    def get_samp_rate(self):
        return self.samp_rate

    def set_samp_rate(self, samp_rate):
        self.samp_rate = samp_rate

    def get_gain(self):
        return self.gain

    def set_gain(self, gain):
        self.gain = gain
        self._gain_slider.set_value(self.gain)
        self._gain_text_box.set_value(self.gain)
        self.uhd_usrp_sink_0.set_gain(self.gain, 0)
       


def main(top_block_cls=Fm_transmitter, options=None):

    tb = top_block_cls()
    tb.Start(True)
    tb.Wait()


if __name__ == '__main__':

    main()