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#!/usr/bin/env python
#
# Copyright 2012 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.
#
from gnuradio import gr
from gnuradio.eng_option import eng_option
from optparse import OptionParser
import os, sys
try:
from gnuradio import qtgui
from PyQt4 import QtGui, QtCore
import sip
except ImportError:
print "Error: Program requires PyQt4 and gr-qtgui."
sys.exit(1)
try:
import scipy
except ImportError:
print "Error: Scipy required (www.scipy.org)."
sys.exit(1)
try:
from gnuradio.qtgui.plot_form import *
except ImportError:
from plot_form import *
def read_samples(filename, start, in_size):
# Read in_size number of samples from file
fhandle = open(filename, 'r')
fhandle.seek(start*gr.sizeof_gr_complex, 0)
data = scipy.fromfile(fhandle, dtype=scipy.complex64, count=in_size)
data = data.tolist()
fhandle.close()
if(len(data) < in_size):
print "Warning: read in {0} samples but asked for {1} samples.".format(
len(data), in_size)
return data
class my_top_block(gr.top_block):
def __init__(self, filelist, samp_rate, start, nsamples, max_nsamples):
gr.top_block.__init__(self)
self._filelist = filelist
self._samp_rate = samp_rate
self._start = start
self._max_nsamps = max_nsamples
self._nsigs = len(self._filelist)
if(nsamples is None):
self._nsamps = max_nsamples
else:
self._nsamps = nsamples
self.qapp = QtGui.QApplication(sys.argv)
self.skip = gr.skiphead(gr.sizeof_gr_complex, self._start)
self.gui_snk = qtgui.time_sink_c(self._nsamps, self._samp_rate,
"GNU Radio Time Plot", self._nsigs)
n = 0
self.srcs = list()
for f in filelist:
data = read_samples(f, self._start, self._nsamps)
self.srcs.append(gr.vector_source_c(data))
# Set default labels based on file names
fname = f.split("/")[-1]
self.gui_snk.set_title(n, "Re{{{0}}}".format(fname))
self.gui_snk.set_title(n+1, "Im{{{0}}}".format(fname))
n += 2
self.connect(self.srcs[0], self.skip)
self.connect(self.skip, (self.gui_snk, 0))
for i,s in enumerate(self.srcs[1:]):
self.connect(s, (self.gui_snk, i+1))
self.gui_snk.set_update_time(0);
# Get Python Qt references
pyQt = self.gui_snk.pyqwidget()
self.pyWin = sip.wrapinstance(pyQt, QtGui.QWidget)
def get_gui(self):
return self.pyWin
def reset(self, newstart, newnsamps):
self.stop()
self.wait()
self._start = newstart
for s,f in zip(self.srcs, self._filelist):
data = read_samples(f, self._start, newnsamps)
s.set_data(data)
if(len(data) < newnsamps):
newnsamps = len(data)
self._nsamps = newnsamps
self.gui_snk.set_nsamps(self._nsamps)
self.start()
def main():
description = "Plots a list of files on a scope plot. Files are a binary list of complex floats."
parser = OptionParser(option_class=eng_option, description=description,
conflict_handler="resolve")
parser.add_option("-N", "--nsamples", type="int", default=None,
help="Set the number of samples to display [default=prints entire file]")
parser.add_option("-S", "--start", type="int", default=0,
help="Starting sample number [default=%default]")
parser.add_option("-r", "--sample-rate", type="eng_float", default=1.0,
help="Set the sample rate of the signal [default=%default]")
(options, args) = parser.parse_args()
if(len(args) < 1):
parser.print_help()
sys.exit(0)
filelist = list(args)
nsamples = options.nsamples
# Find the smallest number of samples in all files and use that as
# a maximum value possible.
filesizes = []
for f in filelist:
if(os.path.exists(f)):
filesizes.append(os.path.getsize(f) / gr.sizeof_gr_complex)
max_nsamples = min(filesizes)
tb = my_top_block(filelist, options.sample_rate,
options.start, nsamples, max_nsamples);
main_box = dialog_box(tb, 'GNU Radio Time Plot')
main_box.show()
tb.run()
tb.qapp.exec_()
if __name__ == "__main__":
try:
main()
except KeyboardInterrupt:
pass
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