#!/usr/bin/env python

#

# Copyright 2007,2008,2011 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.

try:

import scipy

self.fig = figure(1, figsize=(16, 9), facecolor='w')

rcParams['xtick.labelsize'] = self.axis_font_size

rcParams['ytick.labelsize'] = self.axis_font_size

self.text_file = figtext(0.10, 0.94, ("File: %s" % filename), weight="heavy", size=self.text_size)

self.text_file_pos = figtext(0.10, 0.88, "File Position: ", weight="heavy", size=self.text_size)

self.text_block = figtext(0.40, 0.88, ("Block Size: %d" % self.block_length),

self.reals = scipy.array([r.real for r in self.iq])

self.imags = scipy.array([i.imag for i in self.iq])

self.time = scipy.array([i*(1/self.sample_rate) for i in range(len(self.reals))])

def make_plots(self):

# if specified on the command-line, set file pointer

self.hfile.seek(self.sizeof_data*self.start, 1)

self.get_data()

# Subplot for real and imaginary parts of signal

self.sp_iq = self.fig.add_subplot(2,1,1, position=[0.075, 0.14, 0.85, 0.67])

self.sp_iq.set_title(("I&Q"), fontsize=self.title_font_size, fontweight="bold")

1.5*max([self.reals.max(), self.imags.max()])])

self.sp_iq.set_xlim(self.time.min(), self.time.max())

draw()

def click(self, event):

forward_valid_keys = [" ", "down", "right"]

backward_valid_keys = ["up", "left"]

if(find(event.key, forward_valid_keys)):

self.step_forward()

elif(find(event.key, backward_valid_keys)):

self.step_backward()

self.hfile.seek(-self.hfile.tell(),1)

self.get_data()

self.update_plots()

def find(item_in, list_search):

try:

return list_search.index(item_in) != None

except ValueError:

return False

def main():

usage="%prog: [options] input_filename"

description = "Takes a GNU Radio complex binary file and displays the I&Q data versus time. You can set the block size to specify how many points to read in at a time and the start position in the file. By default, the system assumes a sample rate of 1, so in time, each sample is plotted versus the sample number. To set a true time axis, set the sample rate (-R or --sample-rate) to the sample rate used when capturing the samples."

help="Specify where to start in the file [default=%default]")

parser.add_option("-R", "--sample-rate", type="float", default=1.0,

help="Set the sampler rate of the data [default=%default]")

(options, args) = parser.parse_args ()

if len(args) != 1:

parser.print_help()

main()

except KeyboardInterrupt:

pass