plot_fft.py

#!/usr/bin/env python
##################################################
# Gnuradio Python Flow Graph
# Title: Top Block
# Generated: Tue Dec 10 16:39:31 2013
##################################################

from gnuradio import eng_notation
from gnuradio import gr
from gnuradio import uhd
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 forms
from grc_gnuradio import wxgui as grc_wxgui
from optparse import OptionParser
import time
import wx

class top_block(grc_wxgui.top_block_gui):

    def __init__(self):
        grc_wxgui.top_block_gui.__init__(self, title="Top Block")
        _icon_path = "/usr/share/icons/hicolor/32x32/apps/gnuradio-grc.png"
        self.SetIcon(wx.Icon(_icon_path, wx.BITMAP_TYPE_ANY))

        ##################################################
        # Variables
        ##################################################
        self.samp_rate = samp_rate = 5e6
        self.lo_off = lo_off = 2e6
        self.gain_slider = gain_slider = 15
        self.freq_l1 = freq_l1 = 1.57542e6

        ##################################################
        # Blocks
        ##################################################
        _gain_slider_sizer = wx.BoxSizer(wx.VERTICAL)
        self._gain_slider_text_box = forms.text_box(
        	parent=self.GetWin(),
        	sizer=_gain_slider_sizer,
        	value=self.gain_slider,
        	callback=self.set_gain_slider,
        	label='gain_slider',
        	converter=forms.int_converter(),
        	proportion=0,
        )
        self._gain_slider_slider = forms.slider(
        	parent=self.GetWin(),
        	sizer=_gain_slider_sizer,
        	value=self.gain_slider,
        	callback=self.set_gain_slider,
        	minimum=0,
        	maximum=50,
        	num_steps=50,
        	style=wx.SL_HORIZONTAL,
        	cast=int,
        	proportion=1,
        )
        self.Add(_gain_slider_sizer)
        self.wxgui_fftsink2_0 = fftsink2.fft_sink_c(
        	self.GetWin(),
        	baseband_freq=0,
        	y_per_div=10,
        	y_divs=10,
        	ref_level=0,
        	ref_scale=2.0,
        	sample_rate=samp_rate,
        	fft_size=1024,
        	fft_rate=15,
        	average=False,
        	avg_alpha=None,
        	title="FFT Plot",
        	peak_hold=False,
        )
        self.Add(self.wxgui_fftsink2_0.win)
        self.uhd_usrp_source_0 = uhd.usrp_source(
        	device_addr="",
        	stream_args=uhd.stream_args(
        		cpu_format="fc32",
        		otw_format="sc16",
        		channels=range(1),
        	),
        )
        self.uhd_usrp_source_0.set_clock_source("gpsdo", 0)
        self.uhd_usrp_source_0.set_samp_rate(samp_rate)
        self.uhd_usrp_source_0.set_center_freq(uhd.tune_request(freq_l1, lo_off), 0)
        self.uhd_usrp_source_0.set_gain(gain_slider, 0)
        self.uhd_usrp_source_0.set_antenna("RX2", 0)

        ##################################################
        # Connections
        ##################################################
        self.connect((self.uhd_usrp_source_0, 0), (self.wxgui_fftsink2_0, 0))


# QT sink close method reimplementation

    def get_samp_rate(self):
        return self.samp_rate

    def set_samp_rate(self, samp_rate):
        self.samp_rate = samp_rate
        self.wxgui_fftsink2_0.set_sample_rate(self.samp_rate)
        self.uhd_usrp_source_0.set_samp_rate(self.samp_rate)

    def get_lo_off(self):
        return self.lo_off

    def set_lo_off(self, lo_off):
        self.lo_off = lo_off
        self.uhd_usrp_source_0.set_center_freq(uhd.tune_request(self.freq_l1, self.lo_off), 0)

    def get_gain_slider(self):
        return self.gain_slider

    def set_gain_slider(self, gain_slider):
        self.gain_slider = gain_slider
        self._gain_slider_slider.set_value(self.gain_slider)
        self._gain_slider_text_box.set_value(self.gain_slider)
        self.uhd_usrp_source_0.set_gain(self.gain_slider, 0)

    def get_freq_l1(self):
        return self.freq_l1

    def set_freq_l1(self, freq_l1):
        self.freq_l1 = freq_l1
        self.uhd_usrp_source_0.set_center_freq(uhd.tune_request(self.freq_l1, self.lo_off), 0)

if __name__ == '__main__':
    import ctypes
    import os
    if os.name == 'posix':
        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 = top_block()
    tb.Start(True)
    tb.Wait()