diff options
| author | trondeau <trondeau@221aa14e-8319-0410-a670-987f0aec2ac5> | 2008-01-02 17:35:35 +0000 |
|---|---|---|
| committer | trondeau <trondeau@221aa14e-8319-0410-a670-987f0aec2ac5> | 2008-01-02 17:35:35 +0000 |
| commit | ce16514534e5d7ebbc4fe46e2b09a25ccc5fdafd (patch) | |
| tree | 2d9ae1179cb26f213125accabaea8eb05d63f109 /gnuradio-core/src/utils/gr_plot_float.py | |
| parent | 481636b7be1462dc9f1909ac4700002af63dc8c0 (diff) | |
Merging ofdm2 branch -r7047:7321 into trunk. This updates the OFDM code to hier_block2 in blks2impl and removed from blksimpl. The new code
implements a decision feedback sync loop to lock the phase/freq, removes two unnecessary premables and performs frame sync and equalization off
single preamble symbol. Also adds/updates Python plotting tools and a branchless clip algorithm in gr_math.h.
git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@7324 221aa14e-8319-0410-a670-987f0aec2ac5
Diffstat (limited to 'gnuradio-core/src/utils/gr_plot_float.py')
| -rwxr-xr-x | gnuradio-core/src/utils/gr_plot_float.py | 158 |
1 files changed, 124 insertions, 34 deletions
diff --git a/gnuradio-core/src/utils/gr_plot_float.py b/gnuradio-core/src/utils/gr_plot_float.py index e4043a6408..473326012d 100755 --- a/gnuradio-core/src/utils/gr_plot_float.py +++ b/gnuradio-core/src/utils/gr_plot_float.py @@ -20,50 +20,142 @@ # 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_c: + 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_f.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()//4)) + f = scipy.fromfile(self.hfile, dtype=scipy.float32, 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): + # if specified on the command-line, set file pointer + self.hfile.seek(8*self.start, 1) + + self.get_data() + + # Subplot for real and imaginary parts of signal + 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 = plot(self.time, self.f, 'bo-') + self.sp_f.set_ylim([1.5*min(self.f), + 1.5*max(self.f)]) + + draw() + + def update_plots(self): + self.plot_f[0].set_data([self.time, self.f]) + self.sp_f.set_ylim([1.5*min(self.f), + 1.5*max(self.f)]) + 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() >= 8*self.block_length ): + self.hfile.seek(-8*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 floating point 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 = 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] - fl = gr_read_binary.read_float_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(fl) - options.skip - - 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(("GNU Radio Float"), fontsize=26, fontweight="bold") - sp1.set_xlabel("Time (s)", fontsize=20, fontweight="bold") - sp1.set_ylabel("Amplitude (V)", fontsize=20, fontweight="bold") - plot(x, fl, 'bo-') - - show() + dc = draw_fft_c(filename, options) if __name__ == "__main__": try: @@ -71,5 +163,3 @@ if __name__ == "__main__": except KeyboardInterrupt: pass - - |