#!/usr/bin/env python # # Copyright 2007,2008 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 except ImportError: print "Please install SciPy to run this script (http://www.scipy.org/)" raise SystemExit, 1 try: from pylab import * except ImportError: print "Please install Matplotlib to run this script (http://matplotlib.sourceforge.net/)" raise SystemExit, 1 from optparse import OptionParser matplotlib.interactive(True) matplotlib.use('TkAgg') class plot_data: def __init__(self, datatype, filenames, options): self.hfile = list() self.legend_text = list() for f in filenames: self.hfile.append(open(f, "r")) self.legend_text.append(f) self.block_length = options.block self.start = options.start self.sample_rate = options.sample_rate self.datatype = datatype self.sizeof_data = datatype().nbytes # number of bytes per sample in file self.axis_font_size = 16 self.label_font_size = 18 self.title_font_size = 20 self.text_size = 22 # Setup PLOT 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_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), weight="heavy", size=self.text_size) self.text_sr = figtext(0.60, 0.88, ("Sample Rate: %.2f" % self.sample_rate), weight="heavy", size=self.text_size) self.make_plots() self.button_left_axes = self.fig.add_axes([0.45, 0.01, 0.05, 0.05], frameon=True) self.button_left = Button(self.button_left_axes, "<") self.button_left_callback = self.button_left.on_clicked(self.button_left_click) self.button_right_axes = self.fig.add_axes([0.50, 0.01, 0.05, 0.05], frameon=True) self.button_right = Button(self.button_right_axes, ">") self.button_right_callback = self.button_right.on_clicked(self.button_right_click) self.xlim = self.sp_f.get_xlim() self.manager = get_current_fig_manager() connect('key_press_event', self.click) show() def get_data(self, hfile): self.text_file_pos.set_text("File Position: %d" % (hfile.tell()//self.sizeof_data)) f = scipy.fromfile(hfile, dtype=self.datatype, count=self.block_length) #print "Read in %d items" % len(self.f) if(len(f) == 0): print "End of File" else: self.f = f self.time = [i*(1/self.sample_rate) for i in range(len(self.f))] def make_plots(self): self.sp_f = self.fig.add_subplot(2,1,1, position=[0.075, 0.2, 0.875, 0.6]) self.sp_f.set_title(("Amplitude"), fontsize=self.title_font_size, fontweight="bold") self.sp_f.set_xlabel("Time (s)", fontsize=self.label_font_size, fontweight="bold") self.sp_f.set_ylabel("Amplitude (V)", fontsize=self.label_font_size, fontweight="bold") self.plot_f = list() maxval = -1e12 minval = 1e12 for hf in self.hfile: # if specified on the command-line, set file pointer hf.seek(self.sizeof_data*self.start, 1) self.get_data(hf) # Subplot for real and imaginary parts of signal self.plot_f += plot(self.time, self.f, 'o-') maxval = max(maxval, max(self.f)) minval = min(minval, min(self.f)) self.sp_f.set_ylim([1.5*minval, 1.5*maxval]) self.leg = self.sp_f.legend(self.plot_f, self.legend_text) draw() def update_plots(self): maxval = -1e12 minval = 1e12 for hf,p in zip(self.hfile,self.plot_f): self.get_data(hf) p.set_data([self.time, self.f]) maxval = max(maxval, max(self.f)) minval = min(minval, min(self.f)) self.sp_f.set_ylim([1.5*minval, 1.5*maxval]) 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() def button_left_click(self, event): self.step_backward() def button_right_click(self, event): self.step_forward() def step_forward(self): self.update_plots() def step_backward(self): for hf in self.hfile: # Step back in file position if(hf.tell() >= 2*self.sizeof_data*self.block_length ): hf.seek(-2*self.sizeof_data*self.block_length, 1) else: hf.seek(-hf.tell(),1) self.update_plots() #FIXME: there must be a way to do this with a Python builtin def find(item_in, list_search): for l in list_search: if item_in == l: return True return False def main(): usage="%prog: [options] input_filenames" description = "This is just a test program for this class. It should really be called by gr_plot_.py for a specific type of file data (float, int, byte, etc.)." parser = OptionParser(conflict_handler="resolve", usage=usage, description=description) parser.add_option("-B", "--block", type="int", default=1000, help="Specify the block size [default=%default]") parser.add_option("-s", "--start", type="int", default=0, 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() raise SystemExit, 1 filenames = args datatype=scipy.float32 dc = plot_data(datatype, filenames, options) if __name__ == "__main__": try: main() except KeyboardInterrupt: pass