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#!/usr/bin/env python
#
# Copyright 2007 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
# GNU Radio is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3, or (at your option)
# any later version.
#
# GNU Radio is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with GNU Radio; see the file COPYING. If not, write to
# the Free Software Foundation, Inc., 51 Franklin Street,
# Boston, MA 02110-1301, USA.
#
import pylab, math
from pylab import *
import struct, sys
from optparse import OptionParser
import gr_read_binary
class zoom:
def __init__(self, xdata, reals, imags, sp_iq, sp_const, plot_const, manager):
self.sp_iq = sp_iq
self.sp_const = sp_const
self.xaxis = xdata
self.reals = reals
self.imags = imags
self.plot_const = plot_const
self.manager = manager
self.xlim = self.sp_iq.get_xlim()
def __call__(self, event):
newxlim = self.sp_iq.get_xlim()
if(newxlim != self.xlim):
self.xlim = newxlim
r = self.reals[int(self.xlim[0]) : int(self.xlim[1])]
i = self.imags[int(self.xlim[0]) : int(self.xlim[1])]
self.plot_const[0].set_data(r, i)
self.sp_const.axis([-2, 2, -2, 2])
self.manager.canvas.draw()
def main():
usage="%prog: [options] output_filename"
parser = OptionParser(conflict_handler="resolve", usage=usage)
parser.add_option("-s", "--size", type="int", default=None,
help="Specify the number of points to plot [default=%default]")
parser.add_option("", "--skip", type="int", default=None,
help="Specify the number of points to skip [default=%default]")
(options, args) = parser.parse_args ()
if len(args) != 1:
parser.print_help()
raise SystemExit, 1
filename = args[0]
iq = gr_read_binary.read_complex_binary(filename)
if(options.skip is None):
options.skip = 0
if((options.size is None) or ((options.skip+options.size) > len(iq[0]))):
options.size = len(iq[0]) - options.skip
reals = iq[0][options.skip : options.skip + options.size]
imags = iq[1][options.skip : options.skip + options.size]
x = range(options.skip, options.skip + options.size)
# PLOT
f = figure(1, figsize=(16, 12), facecolor='w')
rcParams['xtick.labelsize'] = 16
rcParams['ytick.labelsize'] = 16
# Subplot for real and imaginary parts of signal
sp1 = f.add_subplot(2,1,1)
sp1.set_title(("I&Q"), fontsize=26, fontweight="bold")
sp1.set_xlabel("Time (s)", fontsize=20, fontweight="bold")
sp1.set_ylabel("Amplitude (V)", fontsize=20, fontweight="bold")
plot(x, reals, 'bo-', x, imags, 'ro-')
# Subplot for constellation plot
sp2 = f.add_subplot(2,1,2)
sp2.set_title(("Constellation"), fontsize=26, fontweight="bold")
sp2.set_xlabel("Inphase", fontsize=20, fontweight="bold")
sp2.set_ylabel("Qaudrature", fontsize=20, fontweight="bold")
p2 = plot(reals, imags, 'bo')
sp2.axis([-2, 2, -2, 2])
manager = get_current_fig_manager()
zm = zoom(x, reals, imags, sp1, sp2, p2, manager)
connect('draw_event', zm)
show()
if __name__ == "__main__":
try:
main()
except KeyboardInterrupt:
pass
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