diff options
Diffstat (limited to 'gnuradio-core/src/utils/gr_plot_iq.py')
| -rwxr-xr-x | gnuradio-core/src/utils/gr_plot_iq.py | 160 |
1 files changed, 126 insertions, 34 deletions
diff --git a/gnuradio-core/src/utils/gr_plot_iq.py b/gnuradio-core/src/utils/gr_plot_iq.py index db5d99a11..1bb24517e 100755 --- a/gnuradio-core/src/utils/gr_plot_iq.py +++ b/gnuradio-core/src/utils/gr_plot_iq.py @@ -20,52 +20,144 @@ # Boston, MA 02110-1301, USA. # -import pylab, math +import scipy from pylab import * -import struct, sys from optparse import OptionParser -import gr_read_binary +matplotlib.interactive(True) +matplotlib.use('TkAgg') + +class draw_fft: + def __init__(self, filename, options): + self.hfile = open(filename, "r") + self.block_length = options.block + self.start = options.start + self.sample_rate = options.sample_rate + + 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 = 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), + 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_iq.get_xlim() + + self.manager = get_current_fig_manager() + connect('key_press_event', self.click) + show() + + def get_data(self): + self.text_file_pos.set_text("File Position: %d" % (self.hfile.tell()//8)) + self.iq = scipy.fromfile(self.hfile, dtype=scipy.complex64, count=self.block_length) + #print "Read in %d items" % len(self.iq) + if(len(self.iq) == 0): + print "End of File" + else: + self.reals = [r.real for r in self.iq] + self.imags = [i.imag for i in self.iq] + self.time = [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(16*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") + self.sp_iq.set_xlabel("Time (s)", fontsize=self.label_font_size, fontweight="bold") + self.sp_iq.set_ylabel("Amplitude (V)", fontsize=self.label_font_size, fontweight="bold") + self.plot_iq = plot(self.time, self.reals, 'bo-', self.time, self.imags, 'ro-') + self.sp_iq.set_ylim([1.5*min([min(self.reals), min(self.imags)]), + 1.5*max([max(self.reals), max(self.imags)])]) + + draw() + + def update_plots(self): + self.plot_iq[0].set_data([self.time, self.reals]) + self.plot_iq[1].set_data([self.time, self.imags]) + self.sp_iq.set_ylim([1.5*min([min(self.reals), min(self.imags)]), + 1.5*max([max(self.reals), max(self.imags)])]) + 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.get_data() + self.update_plots() + + def step_backward(self): + # Step back in file position + if(self.hfile.tell() >= 16*self.block_length ): + self.hfile.seek(-16*self.block_length, 1) + else: + self.hfile.seek(-self.hfile.tell(),1) + self.get_data() + 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] 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]") + 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." + 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 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 REAL AND IMAGINARY PARTS - - f = figure(1, figsize=(16, 12), facecolor='w') - rcParams['xtick.labelsize'] = 16 - rcParams['ytick.labelsize'] = 16 - - sp1 = f.add_subplot(1,1,1) - 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-') - - show() + dc = draw_fft(filename, options) if __name__ == "__main__": try: |