diff options
Diffstat (limited to 'gnuradio-examples/python')
| -rw-r--r-- | gnuradio-examples/python/usrp/Makefile.am | 6 | ||||
| -rwxr-xr-x | gnuradio-examples/python/usrp/usrp_nbfm_ptt.py | 497 | ||||
| -rwxr-xr-x | gnuradio-examples/python/usrp/usrp_nbfm_rcv.py | 383 |
3 files changed, 1 insertions, 885 deletions
diff --git a/gnuradio-examples/python/usrp/Makefile.am b/gnuradio-examples/python/usrp/Makefile.am index ef89f0fff..e91e2a4ae 100644 --- a/gnuradio-examples/python/usrp/Makefile.am +++ b/gnuradio-examples/python/usrp/Makefile.am @@ -25,12 +25,9 @@ ourdatadir = $(exampledir)/usrp dist_ourdata_SCRIPTS = \ fm_tx_2_daughterboards.py \ - max_power.py \ test_dft_analysis.py \ test_dft_synth.py \ usrp_benchmark_usb.py \ - usrp_nbfm_ptt.py \ - usrp_nbfm_rcv.py \ usrp_spectrum_sense.py \ usrp_test_loop_lfsr.py \ usrp_tv_rcv_nogui.py \ @@ -41,5 +38,4 @@ dist_ourdata_SCRIPTS = \ usrp_wfm_rcv_pll.py \ usrp_wfm_rcv_sca.py \ usrp_wfm_rcv2_nogui.py \ - usrp_wxapt_rcv.py \ - usrp_am_mw_rcv.py + usrp_wxapt_rcv.py diff --git a/gnuradio-examples/python/usrp/usrp_nbfm_ptt.py b/gnuradio-examples/python/usrp/usrp_nbfm_ptt.py deleted file mode 100755 index 3ce1e0c49..000000000 --- a/gnuradio-examples/python/usrp/usrp_nbfm_ptt.py +++ /dev/null @@ -1,497 +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. -# - -import math -import sys -import wx -from optparse import OptionParser - -from gnuradio import gr, gru, eng_notation -from gnuradio import usrp -from gnuradio import audio -from gnuradio import blks2 -from gnuradio.eng_option import eng_option -from gnuradio.wxgui import stdgui2, fftsink2, scopesink2, slider, form -from usrpm import usrp_dbid - -from numpy import convolve, array - -#import os -#print "pid =", os.getpid() -#raw_input('Press Enter to continue: ') - -# //////////////////////////////////////////////////////////////////////// -# Control Stuff -# //////////////////////////////////////////////////////////////////////// - -class ptt_block(stdgui2.std_top_block): - def __init__(self, frame, panel, vbox, argv): - stdgui2.std_top_block.__init__ (self, frame, panel, vbox, argv) - - self.frame = frame - self.space_bar_pressed = False - - 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") - parser.add_option("-T", "--tx-subdev-spec", type="subdev", default=None, - help="select USRP Tx side A or B") - parser.add_option ("-f", "--freq", type="eng_float", default=442.1e6, - help="set Tx and Rx frequency to FREQ", metavar="FREQ") - parser.add_option ("-g", "--rx-gain", type="eng_float", default=None, - help="set rx gain [default=midpoint in dB]") - parser.add_option("-I", "--audio-input", type="string", default="", - help="pcm input device name. E.g., hw:0,0 or /dev/dsp") - parser.add_option("-O", "--audio-output", type="string", default="", - help="pcm output device name. E.g., hw:0,0 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.txpath = transmit_path(options.tx_subdev_spec, options.audio_input) - self.rxpath = receive_path(options.rx_subdev_spec, options.rx_gain, options.audio_output) - self.connect(self.txpath) - self.connect(self.rxpath) - - self._build_gui(frame, panel, vbox, argv, options.no_gui) - - self.set_transmit(False) - self.set_freq(options.freq) - self.set_rx_gain(self.rxpath.gain) # update gui - self.set_volume(self.rxpath.volume) # update gui - self.set_squelch(self.rxpath.threshold()) # update gui - - - def set_transmit(self, enabled): - self.txpath.set_enable(enabled) - self.rxpath.set_enable(not(enabled)) - if enabled: - self.frame.SetStatusText ("Transmitter ON", 1) - else: - self.frame.SetStatusText ("Receiver ON", 1) - - - def set_rx_gain(self, gain): - self.myform['rx_gain'].set_value(gain) # update displayed value - self.rxpath.set_gain(gain) - - def set_tx_gain(self, gain): - self.txpath.set_gain(gain) - - def set_squelch(self, threshold): - self.rxpath.set_squelch(threshold) - 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, freq): - r1 = self.txpath.set_freq(freq) - r2 = self.rxpath.set_freq(freq) - #print "txpath.set_freq =", r1 - #print "rxpath.set_freq =", r2 - if r1 and r2: - self.myform['freq'].set_value(freq) # update displayed value - return r1 and r2 - - def _build_gui(self, frame, panel, vbox, argv, no_gui): - - def _form_set_freq(kv): - return self.set_freq(kv['freq']) - - self.panel = panel - - # FIXME This REALLY needs to be replaced with a hand-crafted button - # that sends both button down and button up events - hbox = wx.BoxSizer(wx.HORIZONTAL) - hbox.Add((10,0), 1) - self.status_msg = wx.StaticText(panel, -1, "Press Space Bar to Transmit") - of = self.status_msg.GetFont() - self.status_msg.SetFont(wx.Font(15, of.GetFamily(), of.GetStyle(), of.GetWeight())) - hbox.Add(self.status_msg, 0, wx.ALIGN_CENTER) - hbox.Add((10,0), 1) - vbox.Add(hbox, 0, wx.EXPAND | wx.ALIGN_CENTER) - - panel.Bind(wx.EVT_KEY_DOWN, self._on_key_down) - panel.Bind(wx.EVT_KEY_UP, self._on_key_up) - panel.Bind(wx.EVT_KILL_FOCUS, self._on_kill_focus) - panel.SetFocus() - - if 1 and not(no_gui): - rx_fft = fftsink2.fft_sink_c(panel, title="Rx Input", fft_size=512, - sample_rate=self.rxpath.if_rate, - ref_level=80, y_per_div=20) - self.connect (self.rxpath.u, rx_fft) - vbox.Add (rx_fft.win, 1, wx.EXPAND) - - if 1 and not(no_gui): - rx_fft = fftsink2.fft_sink_c(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, 1, wx.EXPAND) - - if 0 and not(no_gui): - foo = scopesink2.scope_sink_f(panel, title="Squelch", - sample_rate=32000) - self.connect (self.rxpath.fmrx.div, (foo,0)) - self.connect (self.rxpath.fmrx.gate, (foo,1)) - self.connect (self.rxpath.fmrx.squelch_lpf, (foo,2)) - vbox.Add (foo.win, 1, wx.EXPAND) - - if 0 and not(no_gui): - tx_fft = fftsink2.fft_sink_c(panel, title="Tx Output", - fft_size=512, sample_rate=self.txpath.usrp_rate) - self.connect (self.txpath.amp, tx_fft) - vbox.Add (tx_fft.win, 1, wx.EXPAND) - - - # add control area at the bottom - - self.myform = myform = form.form() - - # first row - hbox = wx.BoxSizer(wx.HORIZONTAL) - hbox.Add((5,0), 0, 0) - myform['freq'] = form.float_field( - parent=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, 0) - vbox.Add(hbox, 0, wx.EXPAND) - - - # second row - hbox = wx.BoxSizer(wx.HORIZONTAL) - myform['volume'] = \ - form.quantized_slider_field(parent=self.panel, sizer=hbox, label="Volume", - weight=3, range=self.rxpath.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['rx_gain'] = \ - form.quantized_slider_field(parent=self.panel, sizer=hbox, label="Rx Gain", - weight=3, range=self.rxpath.subdev.gain_range(), - callback=self.set_rx_gain) - hbox.Add((5,0), 0) - vbox.Add(hbox, 0, wx.EXPAND) - - - self._build_subpanel(vbox) - - def _build_subpanel(self, vbox_arg): - # build a secondary information panel (sometimes hidden) - - # FIXME figure out how to have this be a subpanel that is always - # created, but has its visibility controlled by foo.Show(True/False) - - #if not(self.show_debug_info): - # return - - panel = self.panel - vbox = vbox_arg - myform = self.myform - - #panel = wx.Panel(self.panel, -1) - #vbox = wx.BoxSizer(wx.VERTICAL) - - hbox = wx.BoxSizer(wx.HORIZONTAL) - hbox.Add((5,0), 0) - #myform['decim'] = form.static_float_field( - # parent=panel, sizer=hbox, label="Decim") - - #hbox.Add((5,0), 1) - #myform['fs@usb'] = form.static_float_field( - # parent=panel, sizer=hbox, label="Fs@USB") - - #hbox.Add((5,0), 1) - #myform['dbname'] = form.static_text_field( - # parent=panel, sizer=hbox) - - hbox.Add((5,0), 0) - vbox.Add(hbox, 0, wx.EXPAND) - - - def _set_status_msg(self, msg, which=0): - self.frame.GetStatusBar().SetStatusText(msg, which) - - def _on_key_down(self, evt): - # print "key_down:", evt.m_keyCode - if evt.m_keyCode == wx.WXK_SPACE and not(self.space_bar_pressed): - self.space_bar_pressed = True - self.set_transmit(True) - - def _on_key_up(self, evt): - # print "key_up", evt.m_keyCode - if evt.m_keyCode == wx.WXK_SPACE: - self.space_bar_pressed = False - self.set_transmit(False) - - def _on_kill_focus(self, evt): - # if we lose the keyboard focus, turn off the transmitter - self.space_bar_pressed = False - self.set_transmit(False) - - -# //////////////////////////////////////////////////////////////////////// -# Transmit Path -# //////////////////////////////////////////////////////////////////////// - -class transmit_path(gr.hier_block2): - def __init__(self, subdev_spec, audio_input): - gr.hier_block2.__init__(self, "transmit_path", - gr.io_signature(0, 0, 0), # Input signature - gr.io_signature(0, 0, 0)) # Output signature - - self.u = usrp.sink_c () - - dac_rate = self.u.dac_rate(); - self.if_rate = 320e3 # 320 kS/s - self.usrp_interp = int(dac_rate // self.if_rate) - self.u.set_interp_rate(self.usrp_interp) - self.sw_interp = 10 - self.audio_rate = self.if_rate // self.sw_interp # 32 kS/s - - self.audio_gain = 10 - self.normal_gain = 32000 - - self.audio = audio.source(int(self.audio_rate), audio_input) - self.audio_amp = gr.multiply_const_ff(self.audio_gain) - - lpf = gr.firdes.low_pass (1, # gain - self.audio_rate, # sampling rate - 3800, # low pass cutoff freq - 300, # width of trans. band - gr.firdes.WIN_HANN) # filter type - - hpf = gr.firdes.high_pass (1, # gain - self.audio_rate, # sampling rate - 325, # low pass cutoff freq - 50, # width of trans. band - gr.firdes.WIN_HANN) # filter type - - audio_taps = convolve(array(lpf),array(hpf)) - self.audio_filt = gr.fir_filter_fff(1,audio_taps) - - self.pl = blks2.ctcss_gen_f(self.audio_rate,123.0) - self.add_pl = gr.add_ff() - self.connect(self.pl,(self.add_pl,1)) - - self.fmtx = blks2.nbfm_tx(self.audio_rate, self.if_rate) - self.amp = gr.multiply_const_cc (self.normal_gain) - - # determine the daughterboard subdevice we're using - if subdev_spec is None: - subdev_spec = usrp.pick_tx_subdevice(self.u) - self.u.set_mux(usrp.determine_tx_mux_value(self.u, subdev_spec)) - self.subdev = usrp.selected_subdev(self.u, subdev_spec) - print "TX using", self.subdev.name() - - self.connect(self.audio, self.audio_amp, self.audio_filt, - (self.add_pl,0), self.fmtx, self.amp, self.u) - - self.set_gain(self.subdev.gain_range()[1]) # set max Tx gain - - - 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 up converter. Finally, we feed - any residual_freq to the s/w freq translater. - """ - r = self.u.tune(self.subdev.which(), self.subdev, target_freq) - if r: - # Use residual_freq in s/w freq translator - return True - - return False - - def set_gain(self, gain): - self.gain = gain - self.subdev.set_gain(gain) - - def set_enable(self, enable): - self.subdev.set_enable(enable) # set H/W Tx enable - if enable: - self.amp.set_k (self.normal_gain) - else: - self.amp.set_k (0) - - - -# //////////////////////////////////////////////////////////////////////// -# Receive Path -# //////////////////////////////////////////////////////////////////////// - -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 - 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 "RX using", self.subdev.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 - 13e3, # low pass cutoff freq - 4e3, # 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 - - # instantiate the guts of the single channel receiver - self.fmrx = blks2.nbfm_rx(audio_rate, self.quad_rate) - - # standard squelch block - self.squelch = blks2.standard_squelch(audio_rate) - - # audio gain / mute block - self._audio_gain = gr.multiply_const_ff(1.0) - - # sound card as final sink - audio_sink = audio.sink (int(audio_rate), audio_output) - - # now wire it all together - 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.enabled = True - 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 set_enable(self, enable): - self.enabled = enable - self._update_audio_gain() - - def _update_audio_gain(self): - if self.enabled: - self._audio_gain.set_k(10**(self.volume/10)) - else: - self._audio_gain.set_k(0) - - def squelch_range(self): - return self.squelch.squelch_range() - - def set_squelch(self, threshold): - print "SQL =", threshold - self.squelch.set_threshold(threshold) - - def threshold(self): - return self.squelch.threshold() - - 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 = self.u.tune(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 -# //////////////////////////////////////////////////////////////////////// - -def main(): - app = stdgui2.stdapp(ptt_block, "NBFM Push to Talk") - app.MainLoop() - -if __name__ == '__main__': - main() 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 () |