419 lines
12 KiB
Python
419 lines
12 KiB
Python
#!/usr/bin/env python
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# Copyright 2011, 2012, 2013, 2014, 2015 Max H. Parke KA1RBI
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#
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# This file is part of OP25
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#
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# OP25 is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3, or (at your option)
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# any later version.
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#
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# OP25 is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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# License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with OP25; see the file COPYING. If not, write to the Free
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# Software Foundation, Inc., 51 Franklin Street, Boston, MA
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# 02110-1301, USA.
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import sys
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import os
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import time
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import subprocess
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from gnuradio import gr, gru, eng_notation
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from gnuradio import blocks, audio
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from gnuradio.eng_option import eng_option
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import numpy as np
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from gnuradio import gr
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from math import pi
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_def_debug = 0
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_def_sps = 10
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GNUPLOT = '/usr/bin/gnuplot'
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FFT_AVG = 0.25
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MIX_AVG = 0.15
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BAL_AVG = 0.05
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FFT_BINS = 512
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def degrees(r):
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d = 360 * r / (2*pi)
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while d <0:
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d += 360
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while d > 360:
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d -= 360
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return d
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def limit(a,lim):
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if a > lim:
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return lim
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return a
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class wrap_gp(object):
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def __init__(self, sps=_def_sps, logfile=None):
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self.sps = sps
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self.center_freq = 0.0
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self.relative_freq = 0.0
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self.offset_freq = 0.0
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self.width = None
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self.ffts = ()
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self.freqs = ()
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self.avg_pwr = np.zeros(FFT_BINS)
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self.avg_sum_pwr = 0.0
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self.buf = []
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self.plot_count = 0
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self.last_plot = 0
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self.plot_interval = None
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self.sequence = 0
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self.output_dir = None
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self.filename = None
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self.logfile = logfile
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self.attach_gp()
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def attach_gp(self):
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args = (GNUPLOT, '-noraise')
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exe = GNUPLOT
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self.gp = subprocess.Popen(args, executable=exe, stdin=subprocess.PIPE)
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def kill(self):
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try:
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self.gp.stdin.close() # closing pipe should cause subprocess to exit
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except IOError:
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pass
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sleep_count = 0
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while True: # wait politely, but only for so long
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self.gp.poll()
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if self.gp.returncode is not None:
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break
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time.sleep(0.1)
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if self.gp.returncode is not None:
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break
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sleep_count += 1
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if (sleep_count & 1) == 0:
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self.gp.kill()
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if sleep_count >= 3:
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break
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def set_interval(self, v):
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self.plot_interval = v
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def set_output_dir(self, v):
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self.output_dir = v
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def plot(self, buf, bufsz, mode='eye'):
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BUFSZ = bufsz
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consumed = min(len(buf), BUFSZ-len(self.buf))
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if len(self.buf) < BUFSZ:
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self.buf.extend(buf[:consumed])
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if len(self.buf) < BUFSZ:
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return consumed
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self.plot_count += 1
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if mode == 'eye' and self.plot_count % 20 != 0:
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self.buf = []
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return consumed
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plots = []
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s = ''
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plot_size = (320,240)
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while(len(self.buf)):
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if mode == 'eye':
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if len(self.buf) < self.sps:
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break
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for i in range(self.sps):
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s += '%f\n' % self.buf[i]
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s += 'e\n'
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self.buf=self.buf[self.sps:]
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plots.append('"-" with lines')
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elif mode == 'constellation':
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plot_size = (240,240)
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self.buf = self.buf[:100]
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for b in self.buf:
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s += '%f\t%f\n' % (degrees(np.angle(b)), limit(np.abs(b),1.0))
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s += 'e\n'
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plots.append('"-" with points')
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for b in self.buf:
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#s += '%f\t%f\n' % (b.real, b.imag)
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s += '%f\t%f\n' % (degrees(np.angle(b)), limit(np.abs(b),1.0))
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s += 'e\n'
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self.buf = []
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plots.append('"-" with lines')
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elif mode == 'symbol':
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for b in self.buf:
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s += '%f\n' % (b)
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s += 'e\n'
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self.buf = []
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plots.append('"-" with points')
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elif mode == 'fft' or mode == 'mixer':
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sum_pwr = 0.0
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self.ffts = np.fft.fft(self.buf * np.blackman(BUFSZ)) / (0.42 * BUFSZ)
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self.ffts = np.fft.fftshift(self.ffts)
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self.freqs = np.fft.fftfreq(len(self.ffts))
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self.freqs = np.fft.fftshift(self.freqs)
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tune_freq = (self.center_freq - self.relative_freq) / 1e6
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if self.center_freq and self.width:
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self.freqs = ((self.freqs * self.width) + self.center_freq + self.offset_freq) / 1e6
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for i in range(len(self.ffts)):
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if mode == 'fft':
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self.avg_pwr[i] = ((1.0 - FFT_AVG) * self.avg_pwr[i]) + (FFT_AVG * np.abs(self.ffts[i]))
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else:
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self.avg_pwr[i] = ((1.0 - MIX_AVG) * self.avg_pwr[i]) + (MIX_AVG * np.abs(self.ffts[i]))
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s += '%f\t%f\n' % (self.freqs[i], 20 * np.log10(self.avg_pwr[i]))
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if (mode == 'mixer') and (self.avg_pwr[i] > 1e-5):
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if (self.freqs[i] - self.center_freq) < 0:
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sum_pwr -= self.avg_pwr[i]
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elif (self.freqs[i] - self.center_freq) > 0:
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sum_pwr += self.avg_pwr[i]
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self.avg_sum_pwr = ((1.0 - BAL_AVG) * self.avg_sum_pwr) + (BAL_AVG * sum_pwr)
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s += 'e\n'
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self.buf = []
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plots.append('"-" with lines')
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elif mode == 'float':
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for b in self.buf:
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s += '%f\n' % (b)
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s += 'e\n'
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self.buf = []
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plots.append('"-" with lines')
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self.buf = []
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# FFT processing needs to be completed to maintain the weighted average buckets
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# regardless of whether we actually produce a new plot or not.
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if self.plot_interval and self.last_plot + self.plot_interval > time.time():
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return consumed
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self.last_plot = time.time()
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filename = None
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if self.output_dir:
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if self.sequence >= 2:
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delete_pathname = '%s/plot-%s-%d.png' % (self.output_dir, mode, self.sequence-2)
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if os.access(delete_pathname, os.W_OK):
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os.remove(delete_pathname)
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h0= 'set terminal png size %d, %d\n' % (plot_size)
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filename = 'plot-%s-%d.png' % (mode, self.sequence)
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h0 += 'set output "%s/%s"\n' % (self.output_dir, filename)
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self.sequence += 1
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else:
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h0= 'set terminal x11 noraise\n'
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background = ''
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h = 'set key off\n'
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if mode == 'constellation':
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h+= background
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h+= 'set size square\n'
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h+= 'set xrange [-1:1]\n'
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h+= 'set yrange [-1:1]\n'
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h += 'unset border\n'
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h += 'set polar\n'
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h += 'set angles degrees\n'
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h += 'unset raxis\n'
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h += 'set object circle at 0,0 size 1 fillcolor rgb 0x0f01 fillstyle solid behind\n'
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h += 'set style line 10 lt 1 lc rgb 0x404040 lw 0.1\n'
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h += 'set grid polar 45\n'
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h += 'set grid ls 10\n'
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h += 'set xtics axis\n'
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h += 'set ytics axis\n'
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h += 'set xtics scale 0\n'
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h += 'set xtics ("" 0.2, "" 0.4, "" 0.6, "" 0.8, "" 1)\n'
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h += 'set ytics 0, 0.2, 1\n'
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h += 'set format ""\n'
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h += 'set style line 11 lt 1 lw 2 pt 2 ps 2\n'
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h+= 'set title "Constellation"\n'
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elif mode == 'eye':
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h+= background
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h+= 'set yrange [-4:4]\n'
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h+= 'set title "Datascope"\n'
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elif mode == 'symbol':
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h+= background
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h+= 'set yrange [-4:4]\n'
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h+= 'set title "Symbol"\n'
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elif mode == 'fft' or mode == 'mixer':
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h+= 'unset arrow; unset title\n'
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h+= 'set xrange [%f:%f]\n' % (self.freqs[0], self.freqs[len(self.freqs)-1])
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h+= 'set xlabel "Frequency"\n'
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h+= 'set ylabel "Power(dB)"\n'
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h+= 'set grid\n'
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h+= 'set yrange [-100:0]\n'
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if mode == 'mixer': # mixer
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h+= 'set title "Mixer: balance %3.0f (smaller is better)"\n' % (np.abs(self.avg_sum_pwr * 1000))
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else: # fft
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h+= 'set title "Spectrum"\n'
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if self.center_freq:
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arrow_pos = (self.center_freq - self.relative_freq) / 1e6
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h+= 'set arrow from %f, graph 0 to %f, graph 1 nohead\n' % (arrow_pos, arrow_pos)
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h+= 'set title "Spectrum: tuned to %f Mhz"\n' % arrow_pos
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elif mode == 'float':
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h+= 'set yrange [-2:2]\n'
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h+= 'set title "Oscilloscope"\n'
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dat = '%s%splot %s\n%s' % (h0, h, ','.join(plots), s)
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if sys.version[0] != '2':
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dat = bytes(dat, 'utf8')
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if self.logfile is not None:
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with open(self.logfile, 'a') as fd:
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fd.write(dat)
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self.gp.poll()
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if self.gp.returncode is None: # make sure gnuplot is still running
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try:
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self.gp.stdin.write(dat)
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except (IOError, ValueError):
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pass
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if filename:
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self.filename = filename
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return consumed
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def set_center_freq(self, f):
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self.center_freq = f
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def set_relative_freq(self, f):
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self.relative_freq = f
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def set_offset(self, f):
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self.offset_freq = f
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def set_width(self, w):
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self.width = w
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def set_logfile(self, logfile=None):
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self.logfile = logfile
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class eye_sink_f(gr.sync_block):
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"""
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"""
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def __init__(self, debug = _def_debug, sps = _def_sps):
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gr.sync_block.__init__(self,
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name="eye_sink_f",
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in_sig=[np.float32],
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out_sig=None)
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self.debug = debug
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self.sps = sps
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self.gnuplot = wrap_gp(sps=self.sps)
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def work(self, input_items, output_items):
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in0 = input_items[0]
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consumed = self.gnuplot.plot(in0, 100 * self.sps, mode='eye')
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return consumed ### len(input_items[0])
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def kill(self):
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self.gnuplot.kill()
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class constellation_sink_c(gr.sync_block):
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"""
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"""
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def __init__(self, debug = _def_debug):
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gr.sync_block.__init__(self,
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name="constellation_sink_c",
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in_sig=[np.complex64],
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out_sig=None)
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self.debug = debug
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self.gnuplot = wrap_gp()
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def work(self, input_items, output_items):
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in0 = input_items[0]
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self.gnuplot.plot(in0, 1000, mode='constellation')
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return len(input_items[0])
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def kill(self):
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self.gnuplot.kill()
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class fft_sink_c(gr.sync_block):
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"""
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"""
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def __init__(self, debug = _def_debug):
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gr.sync_block.__init__(self,
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name="fft_sink_c",
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in_sig=[np.complex64],
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out_sig=None)
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self.debug = debug
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self.gnuplot = wrap_gp()
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self.skip = 0
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def work(self, input_items, output_items):
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self.skip += 1
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if self.skip >= 50:
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self.skip = 0
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in0 = input_items[0]
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self.gnuplot.plot(in0, FFT_BINS, mode='fft')
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return len(input_items[0])
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def kill(self):
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self.gnuplot.kill()
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def set_center_freq(self, f):
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self.gnuplot.set_center_freq(f)
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self.gnuplot.set_relative_freq(0.0)
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def set_relative_freq(self, f):
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self.gnuplot.set_relative_freq(f)
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def set_offset(self, f):
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self.gnuplot.set_offset(f)
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def set_width(self, w):
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self.gnuplot.set_width(w)
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class mixer_sink_c(gr.sync_block):
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"""
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"""
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def __init__(self, debug = _def_debug):
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gr.sync_block.__init__(self,
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name="mixer_sink_c",
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in_sig=[np.complex64],
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out_sig=None)
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self.debug = debug
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self.gnuplot = wrap_gp()
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self.skip = 0
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def work(self, input_items, output_items):
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self.skip += 1
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if self.skip >= 10:
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self.skip = 0
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in0 = input_items[0]
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self.gnuplot.plot(in0, FFT_BINS, mode='mixer')
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return len(input_items[0])
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def kill(self):
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self.gnuplot.kill()
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class symbol_sink_f(gr.sync_block):
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"""
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"""
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def __init__(self, debug = _def_debug):
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gr.sync_block.__init__(self,
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name="symbol_sink_f",
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in_sig=[np.float32],
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out_sig=None)
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self.debug = debug
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self.gnuplot = wrap_gp()
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def work(self, input_items, output_items):
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in0 = input_items[0]
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self.gnuplot.plot(in0, 2400, mode='symbol')
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return len(input_items[0])
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def kill(self):
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self.gnuplot.kill()
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class float_sink_f(gr.sync_block):
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"""
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"""
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def __init__(self, debug = _def_debug):
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gr.sync_block.__init__(self,
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name="float_sink_f",
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in_sig=[np.float32],
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out_sig=None)
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self.debug = debug
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self.gnuplot = wrap_gp()
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def work(self, input_items, output_items):
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in0 = input_items[0]
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self.gnuplot.plot(in0, 2000, mode='float')
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return len(input_items[0])
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def kill(self):
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self.gnuplot.kill()
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