From 6d9a16470bbb416d311a8830d7db42d6c69a39cf Mon Sep 17 00:00:00 2001
From: Johnathan Corgan <johnathan@corganlabs.com>
Date: Thu, 8 Sep 2016 13:15:11 -0700
Subject: wxgui: removed
---
gr-uhd/examples/python/usrp_spectrum_sense.py | 318 --------------------------
1 file changed, 318 deletions(-)
delete mode 100755 gr-uhd/examples/python/usrp_spectrum_sense.py
(limited to 'gr-uhd/examples/python/usrp_spectrum_sense.py')
diff --git a/gr-uhd/examples/python/usrp_spectrum_sense.py b/gr-uhd/examples/python/usrp_spectrum_sense.py
deleted file mode 100755
index b1ea6b44d8..0000000000
--- a/gr-uhd/examples/python/usrp_spectrum_sense.py
+++ /dev/null
@@ -1,318 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2005,2007,2011 Free Software Foundation, Inc.
-#
-# This file is part of GNU Radio
-#
-# GNU Radio is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 3, or (at your option)
-# any later version.
-#
-# GNU Radio is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with GNU Radio; see the file COPYING. If not, write to
-# the Free Software Foundation, Inc., 51 Franklin Street,
-# Boston, MA 02110-1301, USA.
-#
-
-from gnuradio import gr, eng_notation
-from gnuradio import blocks
-from gnuradio import audio
-from gnuradio import filter
-from gnuradio import fft
-from gnuradio import uhd
-from gnuradio.eng_option import eng_option
-from optparse import OptionParser
-import sys
-import math
-import struct
-import threading
-from datetime import datetime
-import time
-
-sys.stderr.write("Warning: this may have issues on some machines+Python version combinations to seg fault due to the callback in bin_statitics.\n\n")
-
-class ThreadClass(threading.Thread):
- def run(self):
- return
-
-class tune(gr.feval_dd):
- """
- This class allows C++ code to callback into python.
- """
- def __init__(self, tb):
- gr.feval_dd.__init__(self)
- self.tb = tb
-
- def eval(self, ignore):
- """
- This method is called from blocks.bin_statistics_f when it wants
- to change the center frequency. This method tunes the front
- end to the new center frequency, and returns the new frequency
- as its result.
- """
-
- try:
- # We use this try block so that if something goes wrong
- # from here down, at least we'll have a prayer of knowing
- # what went wrong. Without this, you get a very
- # mysterious:
- #
- # terminate called after throwing an instance of
- # 'Swig::DirectorMethodException' Aborted
- #
- # message on stderr. Not exactly helpful ;)
-
- new_freq = self.tb.set_next_freq()
-
- # wait until msgq is empty before continuing
- while(self.tb.msgq.full_p()):
- #print "msgq full, holding.."
- time.sleep(0.1)
-
- return new_freq
-
- except Exception, e:
- print "tune: Exception: ", e
-
-
-class parse_msg(object):
- def __init__(self, msg):
- self.center_freq = msg.arg1()
- self.vlen = int(msg.arg2())
- assert(msg.length() == self.vlen * gr.sizeof_float)
-
- # FIXME consider using NumPy array
- t = msg.to_string()
- self.raw_data = t
- self.data = struct.unpack('%df' % (self.vlen,), t)
-
-
-class my_top_block(gr.top_block):
-
- def __init__(self):
- gr.top_block.__init__(self)
-
- usage = "usage: %prog [options] min_freq max_freq"
- parser = OptionParser(option_class=eng_option, usage=usage)
- parser.add_option("-a", "--args", type="string", default="",
- help="UHD device device address args [default=%default]")
- parser.add_option("", "--spec", type="string", default=None,
- help="Subdevice of UHD device where appropriate")
- parser.add_option("-A", "--antenna", type="string", default=None,
- help="select Rx Antenna where appropriate")
- parser.add_option("-s", "--samp-rate", type="eng_float", default=1e6,
- help="set sample rate [default=%default]")
- parser.add_option("-g", "--gain", type="eng_float", default=None,
- help="set gain in dB (default is midpoint)")
- parser.add_option("", "--tune-delay", type="eng_float",
- default=0.25, metavar="SECS",
- help="time to delay (in seconds) after changing frequency [default=%default]")
- parser.add_option("", "--dwell-delay", type="eng_float",
- default=0.25, metavar="SECS",
- help="time to dwell (in seconds) at a given frequency [default=%default]")
- parser.add_option("-b", "--channel-bandwidth", type="eng_float",
- default=6.25e3, metavar="Hz",
- help="channel bandwidth of fft bins in Hz [default=%default]")
- parser.add_option("-l", "--lo-offset", type="eng_float",
- default=0, metavar="Hz",
- help="lo_offset in Hz [default=%default]")
- parser.add_option("-q", "--squelch-threshold", type="eng_float",
- default=None, metavar="dB",
- help="squelch threshold in dB [default=%default]")
- parser.add_option("-F", "--fft-size", type="int", default=None,
- help="specify number of FFT bins [default=samp_rate/channel_bw]")
- parser.add_option("", "--real-time", action="store_true", default=False,
- help="Attempt to enable real-time scheduling")
-
- (options, args) = parser.parse_args()
- if len(args) != 2:
- parser.print_help()
- sys.exit(1)
-
- self.channel_bandwidth = options.channel_bandwidth
-
- self.min_freq = eng_notation.str_to_num(args[0])
- self.max_freq = eng_notation.str_to_num(args[1])
-
- if self.min_freq > self.max_freq:
- # swap them
- self.min_freq, self.max_freq = self.max_freq, self.min_freq
-
- if not options.real_time:
- realtime = False
- else:
- # Attempt to enable realtime scheduling
- r = gr.enable_realtime_scheduling()
- if r == gr.RT_OK:
- realtime = True
- else:
- realtime = False
- print "Note: failed to enable realtime scheduling"
-
- # build graph
- self.u = uhd.usrp_source(device_addr=options.args,
- stream_args=uhd.stream_args('fc32'))
-
- # Set the subdevice spec
- if(options.spec):
- self.u.set_subdev_spec(options.spec, 0)
-
- # Set the antenna
- if(options.antenna):
- self.u.set_antenna(options.antenna, 0)
-
- self.u.set_samp_rate(options.samp_rate)
- self.usrp_rate = usrp_rate = self.u.get_samp_rate()
-
- self.lo_offset = options.lo_offset
-
- if options.fft_size is None:
- self.fft_size = int(self.usrp_rate/self.channel_bandwidth)
- else:
- self.fft_size = options.fft_size
-
- self.squelch_threshold = options.squelch_threshold
-
- s2v = blocks.stream_to_vector(gr.sizeof_gr_complex, self.fft_size)
-
- mywindow = filter.window.blackmanharris(self.fft_size)
- ffter = fft.fft_vcc(self.fft_size, True, mywindow, True)
- power = 0
- for tap in mywindow:
- power += tap*tap
-
- c2mag = blocks.complex_to_mag_squared(self.fft_size)
-
- # FIXME the log10 primitive is dog slow
- #log = blocks.nlog10_ff(10, self.fft_size,
- # -20*math.log10(self.fft_size)-10*math.log10(power/self.fft_size))
-
- # Set the freq_step to 75% of the actual data throughput.
- # This allows us to discard the bins on both ends of the spectrum.
-
- self.freq_step = self.nearest_freq((0.75 * self.usrp_rate), self.channel_bandwidth)
- self.min_center_freq = self.min_freq + (self.freq_step/2)
- nsteps = math.ceil((self.max_freq - self.min_freq) / self.freq_step)
- self.max_center_freq = self.min_center_freq + (nsteps * self.freq_step)
-
- self.next_freq = self.min_center_freq
-
- tune_delay = max(0, int(round(options.tune_delay * usrp_rate / self.fft_size))) # in fft_frames
- dwell_delay = max(1, int(round(options.dwell_delay * usrp_rate / self.fft_size))) # in fft_frames
-
- self.msgq = gr.msg_queue(1)
- self._tune_callback = tune(self) # hang on to this to keep it from being GC'd
- stats = blocks.bin_statistics_f(self.fft_size, self.msgq,
- self._tune_callback, tune_delay,
- dwell_delay)
-
- # FIXME leave out the log10 until we speed it up
- #self.connect(self.u, s2v, ffter, c2mag, log, stats)
- self.connect(self.u, s2v, ffter, c2mag, stats)
-
- if options.gain is None:
- # if no gain was specified, use the mid-point in dB
- g = self.u.get_gain_range()
- options.gain = float(g.start()+g.stop())/2.0
-
- self.set_gain(options.gain)
- print "gain =", options.gain
-
- def set_next_freq(self):
- target_freq = self.next_freq
- self.next_freq = self.next_freq + self.freq_step
- if self.next_freq >= self.max_center_freq:
- self.next_freq = self.min_center_freq
-
- if not self.set_freq(target_freq):
- print "Failed to set frequency to", target_freq
- sys.exit(1)
-
- return target_freq
-
-
- def set_freq(self, target_freq):
- """
- Set the center frequency we're interested in.
-
- Args:
- target_freq: frequency in Hz
- @rypte: bool
- """
-
- r = self.u.set_center_freq(uhd.tune_request(target_freq, rf_freq=(target_freq + self.lo_offset),rf_freq_policy=uhd.tune_request.POLICY_MANUAL))
- if r:
- return True
-
- return False
-
- def set_gain(self, gain):
- self.u.set_gain(gain)
-
- def nearest_freq(self, freq, channel_bandwidth):
- freq = round(freq / channel_bandwidth, 0) * channel_bandwidth
- return freq
-
-def main_loop(tb):
-
- def bin_freq(i_bin, center_freq):
- #hz_per_bin = tb.usrp_rate / tb.fft_size
- freq = center_freq - (tb.usrp_rate / 2) + (tb.channel_bandwidth * i_bin)
- #print "freq original:",freq
- #freq = nearest_freq(freq, tb.channel_bandwidth)
- #print "freq rounded:",freq
- return freq
-
- bin_start = int(tb.fft_size * ((1 - 0.75) / 2))
- bin_stop = int(tb.fft_size - bin_start)
-
- timestamp = 0
- centerfreq = 0
- while 1:
-
- # Get the next message sent from the C++ code (blocking call).
- # It contains the center frequency and the mag squared of the fft
- m = parse_msg(tb.msgq.delete_head())
-
- # m.center_freq is the center frequency at the time of capture
- # m.data are the mag_squared of the fft output
- # m.raw_data is a string that contains the binary floats.
- # You could write this as binary to a file.
-
- # Scanning rate
- if timestamp == 0:
- timestamp = time.time()
- centerfreq = m.center_freq
- if m.center_freq < centerfreq:
- sys.stderr.write("scanned %.1fMHz in %.1fs\n" % ((centerfreq - m.center_freq)/1.0e6, time.time() - timestamp))
- timestamp = time.time()
- centerfreq = m.center_freq
-
- for i_bin in range(bin_start, bin_stop):
-
- center_freq = m.center_freq
- freq = bin_freq(i_bin, center_freq)
- #noise_floor_db = -174 + 10*math.log10(tb.channel_bandwidth)
- noise_floor_db = 10*math.log10(min(m.data)/tb.usrp_rate)
- power_db = 10*math.log10(m.data[i_bin]/tb.usrp_rate) - noise_floor_db
-
- if (power_db > tb.squelch_threshold) and (freq >= tb.min_freq) and (freq <= tb.max_freq):
- print datetime.now(), "center_freq", center_freq, "freq", freq, "power_db", power_db, "noise_floor_db", noise_floor_db
-
-if __name__ == '__main__':
- t = ThreadClass()
- t.start()
-
- tb = my_top_block()
- try:
- tb.start()
- main_loop(tb)
-
- except KeyboardInterrupt:
- pass
--
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