diff options
Diffstat (limited to 'gnuradio-examples/python/usrp/usrp_nbfm_rcv.py')
| -rwxr-xr-x | gnuradio-examples/python/usrp/usrp_nbfm_rcv.py | 383 |
1 files changed, 0 insertions, 383 deletions
diff --git a/gnuradio-examples/python/usrp/usrp_nbfm_rcv.py b/gnuradio-examples/python/usrp/usrp_nbfm_rcv.py deleted file mode 100755 index 4c66fc970..000000000 --- a/gnuradio-examples/python/usrp/usrp_nbfm_rcv.py +++ /dev/null @@ -1,383 +0,0 @@ -#!/usr/bin/env python -# -# Copyright 2005,2007 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, gru, eng_notation, optfir -from gnuradio import audio -from gnuradio import usrp -from gnuradio import blks2 -from gnuradio.eng_option import eng_option -from gnuradio.wxgui import slider, powermate -from gnuradio.wxgui import stdgui2, fftsink2, form -from optparse import OptionParser -from usrpm import usrp_dbid -import sys -import math -import wx - - -#//////////////////////////////////////////////////////////////////////// -# Control Stuff -#//////////////////////////////////////////////////////////////////////// - -class my_top_block (stdgui2.std_top_block): - def __init__(self,frame,panel,vbox,argv): - stdgui2.std_top_block.__init__ (self,frame,panel,vbox,argv) - - parser=OptionParser(option_class=eng_option) - parser.add_option("-R", "--rx-subdev-spec", type="subdev", default=None, - help="select USRP Rx side A or B (default=A)") - parser.add_option("-f", "--freq", type="eng_float", default=146.585e6, - help="set frequency to FREQ", metavar="FREQ") - parser.add_option("-g", "--gain", type="eng_float", default=None, - help="set gain in dB (default is midpoint)") - parser.add_option("-V", "--volume", type="eng_float", default=None, - help="set volume (default is midpoint)") - parser.add_option("-O", "--audio-output", type="string", default="", - help="pcm device name. E.g., hw:0,0 or surround51 or /dev/dsp") - parser.add_option("-N", "--no-gui", action="store_true", default=False) - - (options, args) = parser.parse_args() - if len(args) != 0: - parser.print_help() - sys.exit(1) - - if options.freq < 1e6: - options.freq *= 1e6 - - self.frame = frame - self.panel = panel - - self.state = "FREQ" - self.freq = 0 - self.freq_step = 25e3 - - self.rxpath = receive_path(options.rx_subdev_spec, options.gain, options.audio_output) - self.connect(self.rxpath) - - self._build_gui(vbox, options.no_gui) - - # set initial values - - if options.volume is not None: - self.set_volume(options.volume) - - if not(self.set_freq(options.freq)): - self._set_status_msg("Failed to set initial frequency") - - self.set_gain(self.rxpath.gain) # update gui - self.set_volume(self.rxpath.volume) # update gui - self.set_squelch(self.rxpath.threshold()) # update gui - - - def _set_status_msg(self, msg, which=0): - self.frame.GetStatusBar().SetStatusText(msg, which) - - - def _build_gui(self, vbox, no_gui): - - def _form_set_freq(kv): - return self.set_freq(kv['freq']) - - - self.src_fft = None - if 1 and not(no_gui): - self.src_fft = fftsink2.fft_sink_c(self.panel, title="Data from USRP", - fft_size=512, sample_rate=self.rxpath.if_rate, - ref_scale=32768.0, ref_level=0, y_per_div=10, y_divs=12) - self.connect (self.rxpath.u, self.src_fft) - vbox.Add (self.src_fft.win, 4, wx.EXPAND) - if 1 and not(no_gui): - rx_fft = fftsink2.fft_sink_c(self.panel, title="Post s/w DDC", - fft_size=512, sample_rate=self.rxpath.quad_rate, - ref_level=80, y_per_div=20) - self.connect (self.rxpath.ddc, rx_fft) - vbox.Add (rx_fft.win, 4, wx.EXPAND) - - if 1 and not(no_gui): - post_deemph_fft = fftsink2.fft_sink_f(self.panel, title="Post Deemph", - fft_size=512, sample_rate=self.rxpath.audio_rate, - y_per_div=10, ref_level=-40) - self.connect (self.rxpath.fmrx.deemph, post_deemph_fft) - vbox.Add (post_deemph_fft.win, 4, wx.EXPAND) - - if 0: - post_filt_fft = fftsink2.fft_sink_f(self.panel, title="Post Filter", - fft_size=512, sample_rate=audio_rate, - y_per_div=10, ref_level=-40) - self.connect (self.guts.audio_filter, post_filt) - vbox.Add (fft_win4, 4, wx.EXPAND) - - - # control area form at bottom - self.myform = myform = form.form() - - hbox = wx.BoxSizer(wx.HORIZONTAL) - hbox.Add((5,0), 0) - myform['freq'] = form.float_field( - parent=self.panel, sizer=hbox, label="Freq", weight=1, - callback=myform.check_input_and_call(_form_set_freq, self._set_status_msg)) - - #hbox.Add((5,0), 0) - #myform['freq_slider'] = \ - # form.quantized_slider_field(parent=self.panel, sizer=hbox, weight=3, - # range=(87.9e6, 108.1e6, 0.1e6), - # callback=self.set_freq) - - hbox.Add((5,0), 0) - vbox.Add(hbox, 0, wx.EXPAND) - - hbox = wx.BoxSizer(wx.HORIZONTAL) - hbox.Add((5,0), 0) - - myform['volume'] = \ - form.quantized_slider_field(parent=self.panel, sizer=hbox, label="Volume", - weight=3, range=self.volume_range(), - callback=self.set_volume) - hbox.Add((5,0), 0) - myform['squelch'] = \ - form.quantized_slider_field(parent=self.panel, sizer=hbox, label="Squelch", - weight=3, range=self.rxpath.squelch_range(), - callback=self.set_squelch) - hbox.Add((5,0), 0) - myform['gain'] = \ - form.quantized_slider_field(parent=self.panel, sizer=hbox, label="Gain", - weight=3, range=self.rxpath.subdev.gain_range(), - callback=self.set_gain) - hbox.Add((5,0), 0) - vbox.Add(hbox, 0, wx.EXPAND) - - try: - self.knob = powermate.powermate(self.frame) - self.rot = 0 - powermate.EVT_POWERMATE_ROTATE (self.frame, self.on_rotate) - powermate.EVT_POWERMATE_BUTTON (self.frame, self.on_button) - except: - print "FYI: No Powermate or Contour Knob found" - - - def on_rotate (self, event): - self.rot += event.delta - if (self.state == "FREQ"): - if self.rot >= 3: - self.set_freq(self.freq + self.freq_step) - self.rot -= 3 - elif self.rot <=-3: - self.set_freq(self.freq - self.freq_step) - self.rot += 3 - else: - step = self.volume_range()[2] - if self.rot >= 3: - self.set_volume(self.rxpath.volume + step) - self.rot -= 3 - elif self.rot <=-3: - self.set_volume(self.rxpath.volume - step) - self.rot += 3 - - def on_button (self, event): - if event.value == 0: # button up - return - self.rot = 0 - if self.state == "FREQ": - self.state = "VOL" - else: - self.state = "FREQ" - self.update_status_bar () - - - def set_squelch(self, threshold_in_db): - self.rxpath.set_squelch(threshold_in_db) - self.myform['squelch'].set_value(self.rxpath.threshold()) - - def set_volume (self, vol): - self.rxpath.set_volume(vol) - self.myform['volume'].set_value(self.rxpath.volume) - self.update_status_bar () - - def set_freq(self, target_freq): - r = self.rxpath.set_freq(target_freq) - if r: - self.freq = target_freq - self.myform['freq'].set_value(target_freq) # update displayed value - #self.myform['freq_slider'].set_value(target_freq) # update displayed value - self.update_status_bar() - self._set_status_msg("OK", 0) - return True - - self._set_status_msg("Failed", 0) - return False - - def set_gain(self, gain): - self.myform['gain'].set_value(gain) # update displayed value - self.rxpath.set_gain(gain) - - def update_status_bar (self): - msg = "Volume:%r Setting:%s" % (self.rxpath.volume, self.state) - self._set_status_msg(msg, 1) - if self.src_fft: - self.src_fft.set_baseband_freq(self.freq) - - def volume_range(self): - return (-20.0, 0.0, 0.5) - - -#//////////////////////////////////////////////////////////////////////// -# Receive Path -#//////////////////////////////////////////////////////////////////////// - -USE_SIMPLE_SQUELCH = False - -class receive_path(gr.hier_block2): - def __init__(self, subdev_spec, gain, audio_output): - gr.hier_block2.__init__(self, "receive_path", - gr.io_signature(0, 0, 0), # Input signature - gr.io_signature(0, 0, 0)) # Output signature - - self.u = usrp.source_c () - adc_rate = self.u.adc_rate() - - self.if_rate = 256e3 # 256 kS/s - usrp_decim = int(adc_rate // self.if_rate) - if_decim = 4 - self.u.set_decim_rate(usrp_decim) - self.quad_rate = self.if_rate // if_decim # 64 kS/s - audio_decim = 2 - self.audio_rate = self.quad_rate // audio_decim # 32 kS/s - - - if subdev_spec is None: - subdev_spec = usrp.pick_rx_subdevice(self.u) - self.subdev = usrp.selected_subdev(self.u, subdev_spec) - print "Using RX d'board %s" % (self.subdev.side_and_name(),) - - self.u.set_mux(usrp.determine_rx_mux_value(self.u, subdev_spec)) - - # Create filter to get actual channel we want - chan_coeffs = gr.firdes.low_pass (1.0, # gain - self.if_rate, # sampling rate - 8e3, # low pass cutoff freq - 2e3, # width of trans. band - gr.firdes.WIN_HANN) # filter type - - print "len(rx_chan_coeffs) =", len(chan_coeffs) - - # Decimating Channel filter with frequency translation - # complex in and out, float taps - self.ddc = gr.freq_xlating_fir_filter_ccf(if_decim, # decimation rate - chan_coeffs, # taps - 0, # frequency translation amount - self.if_rate) # input sample rate - - if USE_SIMPLE_SQUELCH: - self.squelch = gr.simple_squelch_cc(20) - else: - self.squelch = blks2.standard_squelch(self.audio_rate) - - # instantiate the guts of the single channel receiver - self.fmrx = blks2.nbfm_rx(self.audio_rate, self.quad_rate) - - # audio gain / mute block - self._audio_gain = gr.multiply_const_ff(1.0) - - # sound card as final sink - audio_sink = audio.sink (int(self.audio_rate), audio_output) - - # now wire it all together - if USE_SIMPLE_SQUELCH: - self.connect (self.u, self.ddc, self.squelch, self.fmrx, - self._audio_gain, audio_sink) - else: - self.connect (self.u, self.ddc, self.fmrx, self.squelch, - self._audio_gain, audio_sink) - - if gain is None: - # if no gain was specified, use the mid-point in dB - g = self.subdev.gain_range() - gain = float(g[0]+g[1])/2 - - self.set_gain(gain) - - v = self.volume_range() - self.set_volume((v[0]+v[1])/2) - s = self.squelch_range() - self.set_squelch((s[0]+s[1])/2) - - def volume_range(self): - return (-20.0, 0.0, 0.5) - - def set_volume (self, vol): - g = self.volume_range() - self.volume = max(g[0], min(g[1], vol)) - self._update_audio_gain() - - def _update_audio_gain(self): - self._audio_gain.set_k(10**(self.volume/10)) - - def squelch_range(self): - r = self.squelch.squelch_range() - #print "squelch_range: ", r - return r - - def set_squelch(self, threshold): - #print "SQL =", threshold - self.squelch.set_threshold(threshold) - - def threshold(self): - t = self.squelch.threshold() - #print "t =", t - return t - - def set_freq(self, target_freq): - """ - Set the center frequency we're interested in. - - @param target_freq: frequency in Hz - @rypte: bool - - Tuning is a two step process. First we ask the front-end to - tune as close to the desired frequency as it can. Then we use - the result of that operation and our target_frequency to - determine the value for the digital down converter in the - FPGA. Finally, we feed any residual_freq to the s/w freq - translator. - """ - - r = usrp.tune(self.u, 0, self.subdev, target_freq) - if r: - # Use residual_freq in s/w freq translater - # print "residual_freq =", r.residual_freq - self.ddc.set_center_freq(-r.residual_freq) - return True - - return False - - def set_gain(self, gain): - self.gain = gain - self.subdev.set_gain(gain) - - -# //////////////////////////////////////////////////////////////////////// -# Main -# //////////////////////////////////////////////////////////////////////// - -if __name__ == '__main__': - app = stdgui2.stdapp (my_top_block, "USRP NBFM RX") - app.MainLoop () |