From 5d69a524f81f234b3fbc41d49ba18d6f6886baba Mon Sep 17 00:00:00 2001
From: jcorgan <jcorgan@221aa14e-8319-0410-a670-987f0aec2ac5>
Date: Thu, 3 Aug 2006 04:51:51 +0000
Subject: Houston, we have a trunk.
git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@3122 221aa14e-8319-0410-a670-987f0aec2ac5
---
gnuradio-examples/python/usrp/usrp_nbfm_ptt.py | 491 +++++++++++++++++++++++++
1 file changed, 491 insertions(+)
create mode 100755 gnuradio-examples/python/usrp/usrp_nbfm_ptt.py
(limited to 'gnuradio-examples/python/usrp/usrp_nbfm_ptt.py')
diff --git a/gnuradio-examples/python/usrp/usrp_nbfm_ptt.py b/gnuradio-examples/python/usrp/usrp_nbfm_ptt.py
new file mode 100755
index 0000000000..3e930bbb51
--- /dev/null
+++ b/gnuradio-examples/python/usrp/usrp_nbfm_ptt.py
@@ -0,0 +1,491 @@
+#!/usr/bin/env python
+#
+# Copyright 2005 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 2, 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., 59 Temple Place - Suite 330,
+# Boston, MA 02111-1307, 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 blks
+from gnuradio.eng_option import eng_option
+from gnuradio.wxgui import stdgui, fftsink, scopesink, slider, form
+import usrp_dbid
+
+from Numeric import convolve, array
+
+#import os
+#print "pid =", os.getpid()
+#raw_input('Press Enter to continue: ')
+
+# ////////////////////////////////////////////////////////////////////////
+# Control Stuff
+# ////////////////////////////////////////////////////////////////////////
+
+class ptt_graph(stdgui.gui_flow_graph):
+ def __init__(self, frame, panel, vbox, argv):
+ stdgui.gui_flow_graph.__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(self, options.tx_subdev_spec, options.audio_input)
+ self.rxpath = receive_path(self, options.rx_subdev_spec, options.rx_gain, options.audio_output)
+ 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 = fftsink.fft_sink_c (self, 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 = fftsink.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, 1, wx.EXPAND)
+
+ if 0 and not(no_gui):
+ foo = scopesink.scope_sink_f (self, 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 = fftsink.fft_sink_c (self, 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_block):
+ def __init__(self, fg, subdev_spec, audio_input):
+
+ 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 = blks.ctcss_gen_f(fg, self.audio_rate,123.0)
+ self.add_pl = gr.add_ff()
+ fg.connect(self.pl,(self.add_pl,1))
+
+ self.fmtx = blks.nbfm_tx(fg, 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()
+
+ fg.connect(self.audio, self.audio_amp, self.audio_filt,
+ (self.add_pl,0), self.fmtx, self.amp, self.u)
+
+ gr.hier_block.__init__(self, fg, None, None)
+
+ 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_block):
+ def __init__(self, fg, subdev_spec, gain, audio_output):
+
+ 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 = blks.nbfm_rx(fg, audio_rate, self.quad_rate)
+
+ # standard squelch block
+ self.squelch = blks.standard_squelch(fg, 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
+ fg.connect (self.u, self.ddc, self.fmrx, self.squelch, self._audio_gain, audio_sink)
+ gr.hier_block.__init__(self, fg, self.u, 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 = stdgui.stdapp(ptt_graph, "NBFM Push to Talk")
+ app.MainLoop()
+
+if __name__ == '__main__':
+ main()
--
cgit v1.2.3