diff options
Diffstat (limited to 'op25/gr-op25_repeater/apps/gr_gnuplot.py')
| -rw-r--r-- | op25/gr-op25_repeater/apps/gr_gnuplot.py | 53 |
1 files changed, 36 insertions, 17 deletions
diff --git a/op25/gr-op25_repeater/apps/gr_gnuplot.py b/op25/gr-op25_repeater/apps/gr_gnuplot.py index f4e4942..58ccc72 100644 --- a/op25/gr-op25_repeater/apps/gr_gnuplot.py +++ b/op25/gr-op25_repeater/apps/gr_gnuplot.py @@ -33,11 +33,18 @@ _def_sps = 10 GNUPLOT = '/usr/bin/gnuplot' +FFT_AVG = 0.25 +FFT_BINS = 512 + class wrap_gp(object): def __init__(self, sps=_def_sps): self.sps = sps self.center_freq = None + self.relative_freq = 0.0 self.width = None + self.ffts = () + self.freqs = () + self.avg_pwr = np.zeros(FFT_BINS) self.buf = [] self.attach_gp() @@ -82,49 +89,57 @@ class wrap_gp(object): self.buf = [] plots.append('"-" with dots') elif mode == 'fft': - ffbuf = np.fft.fft(self.buf * np.blackman(BUFSZ)) / (0.42 * BUFSZ) - ffbuf = np.fft.fftshift(ffbuf) - for i in xrange(len(ffbuf)): - if self.center_freq and self.width: - f = (self.center_freq - self.width / 2.0) / 1e6 - w = self.width / 1e6 - s += '%f\t%f\n' % (f + i*(w/BUFSZ), 20 * np.log10(np.abs(ffbuf[i]))) - else: - s += '%f\n' % (20 * np.log10(np.abs(ffbuf[i]))) + self.ffts = np.fft.fft(self.buf * np.blackman(BUFSZ)) / (0.42 * BUFSZ) + self.ffts = np.fft.fftshift(self.ffts) + self.freqs = np.fft.fftfreq(len(self.ffts)) + self.freqs = np.fft.fftshift(self.freqs) + if self.center_freq and self.width: + self.freqs = ((self.freqs * self.width) + self.center_freq) / 1e6 + for i in xrange(len(self.ffts)): + self.avg_pwr[i] = ((1.0 - FFT_AVG) * self.avg_pwr[i]) + (FFT_AVG * np.abs(self.ffts[i])) + s += '%f\t%f\n' % (self.freqs[i], 20 * np.log10(self.avg_pwr[i])) s += 'e\n' self.buf = [] plots.append('"-" with lines') self.buf = [] h= 'set terminal x11 noraise\n' - background = 'set object 1 circle from screen 0,0 to screen 1,1 fillcolor rgb"black"\n' + #background = 'set object 1 circle at screen 0,0 size screen 1 fillcolor rgb"black"\n' #FIXME! + background = '' h+= 'set key off\n' if mode == 'constellation': - h += background + h+= background h+= 'set size square\n' h+= 'set xrange [-1:1]\n' h+= 'set yrange [-1:1]\n' elif mode == 'eye': - h += background + h+= background h+= 'set yrange [-4:4]\n' elif mode == 'symbol': - h += background + h+= background h+= 'set yrange [-4:4]\n' elif mode == 'fft': + h+= 'unset arrow; unset title\n' + h+= 'set xrange [%f:%f]\n' % (self.freqs[0], self.freqs[len(self.freqs)-1]) h+= 'set yrange [-100:0]\n' + h+= 'set xlabel "Frequency"\n' + h+= 'set ylabel "Power(dB)"\n' h+= 'set grid\n' if self.center_freq: - h += 'set title "%f"\n' % (self.center_freq / 1e6) + arrow_pos = (self.center_freq - self.relative_freq) / 1e6 + h+= 'set arrow from %f, graph 0 to %f, graph 1 nohead\n' % (arrow_pos, arrow_pos) + h+= 'set title "Tuned to %f Mhz"\n' % ((self.center_freq - self.relative_freq) / 1e6) dat = '%splot %s\n%s' % (h, ','.join(plots), s) self.gp.stdin.write(dat) return consumed def set_center_freq(self, f): - sys.stderr.write('set_center_freq: %s\n' % f) self.center_freq = f + def set_relative_freq(self, f): + self.relative_freq = f + def set_width(self, w): - sys.stderr.write('set_width: %f\n' % w) self.width = w class eye_sink_f(gr.sync_block): @@ -183,7 +198,7 @@ class fft_sink_c(gr.sync_block): if self.skip == 50: self.skip = 0 in0 = input_items[0] - self.gnuplot.plot(in0, 512, mode='fft') + self.gnuplot.plot(in0, FFT_BINS, mode='fft') return len(input_items[0]) def kill(self): @@ -191,6 +206,10 @@ class fft_sink_c(gr.sync_block): def set_center_freq(self, f): self.gnuplot.set_center_freq(f) + self.gnuplot.set_relative_freq(0.0) + + def set_relative_freq(self, f): + self.gnuplot.set_relative_freq(f) def set_width(self, w): self.gnuplot.set_width(w) |