1 files changed, 0 insertions, 318 deletions
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