+#

+# Copyright 2007,2008,2011 Free Software Foundation, Inc.

+#

+# This file is part of GNU Radio

+#

+# SPDX-License-Identifier: GPL-3.0-or-later

+#

+#

+"""

+Utility to help plotting data from files.

+"""

+

+from __future__ import print_function

+from __future__ import division

+from __future__ import unicode_literals

+

+from argparse import ArgumentParser

+

+import numpy

+

+try:

+ from pylab import Button, connect, draw, figure, figtext, get_current_fig_manager, show, plot, rcParams

+except ImportError:

+ print("Please install Python Matplotlib (http://matplotlib.sourceforge.net/) and Python TkInter https://wiki.python.org/moin/TkInter to run this script")

+ raise SystemExit(1)

+

+

+datatype_lookup = {

+ "complex64": numpy.complex64,

+ "float32": numpy.float32,

+ "uint32": numpy.uint32,

+ "int32": numpy.int32,

+ "uint16": numpy.uint16,

+ "int16": numpy.int16,

+ "uint8": numpy.uint8,

+ "int8": numpy.int8,

+}

+

+class plot_data(object):

+ 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

+ if self.datatype is None:

+ self.datatype = datatype_lookup[options.data_type]

+ self.sizeof_data = self.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))

+ try:

+ f = numpy.fromfile(hfile, dtype=self.datatype, count=self.block_length)

+ except MemoryError:

+ print("End of File")

+ else:

+ self.f = numpy.array(f)

+ self.time = numpy.array([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, self.f.max())

+ minval = min(minval, self.f.min())

+

+ 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, self.f.max())

+ minval = min(minval, self.f.min())

+

+ 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()

+

+ @staticmethod

+ def setup_options():

+ description = "Takes a GNU Radio binary file and displays the samples 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."

+

+ parser = ArgumentParser(conflict_handler="resolve", description=description)

+ parser.add_argument("-d", "--data-type", default="complex64",

+ choices=("complex64", "float32", "uint32", "int32", "uint16",

+ "int16", "uint8", "int8"),

+ help="Specify the data type [default=%(default)r]")

+ parser.add_argument("-B", "--block", type=int, default=1000,

+ help="Specify the block size [default=%(default)r]")

+ parser.add_argument("-s", "--start", type=int, default=0,

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

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

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

+ parser.add_argument("files", metavar="FILE", nargs='+',

+ help="Input file with samples")

+ return parser

+

+def find(item_in, list_search):

+ try:

+ return list_search.index(item_in) != None

+ except ValueError:

+ return False