Add Max's ALSA based oscope code.
git-svn-id: http://op25.osmocom.org/svn/trunk@92 65a5c917-d112-43f1-993d-58c26a4786be
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#!/usr/bin/env python
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#
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# Copyright 2004,2005,2006,2007 Free Software Foundation, Inc.
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#
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# This file is part of GNU Radio
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#
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# GNU Radio is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3, or (at your option)
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# any later version.
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#
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# GNU Radio is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with GNU Radio; see the file COPYING. If not, write to
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# the Free Software Foundation, Inc., 51 Franklin Street,
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# Boston, MA 02110-1301, USA.
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#
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# Based on usrp_fsk4_oscope.py - sound card coded added by KA1RBI ( ikj1234i at yahoo dot com )
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# print "Loading revised usrp_oscope with additional options for scopesink..."
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from gnuradio import gr, gru, optfir
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from gnuradio import audio
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from gnuradio import eng_notation
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from gnuradio.eng_option import eng_option
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from gnuradio.wxgui import stdgui2, scopesink2, form, slider
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from optparse import OptionParser
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import wx
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import sys
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from gnuradio import fsk4
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from math import pi
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import threading
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class app_top_block(stdgui2.std_top_block):
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def __init__( self, frame, panel, vbox, argv):
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stdgui2.std_top_block.__init__( self, frame, panel, vbox, argv)
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self.frame = frame
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self.panel = panel
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self.offset = 0.0
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parser = OptionParser(option_class=eng_option)
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parser.add_option("-R", "--rx-subdev-spec", type="subdev", default=None,
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help="select USRP Rx side A or B (default=first one with a daughterboard)")
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parser.add_option("-d", "--decim", type="int", default=1,
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help="set fgpa decimation rate to DECIM [default=%default]")
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parser.add_option("-f", "--freq", type="eng_float", default=None,
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help="set frequency to FREQ", metavar="FREQ")
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parser.add_option("-p", "--protocol", type="int", default=0,
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help="set protocol: 0 = RDLAP 19.2kbps (default); 1 = APCO25")
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parser.add_option("-g", "--gain", type="eng_float", default=1,
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help="set gain multiplier")
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parser.add_option("-8", "--width-8", action="store_true", default=False,
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help="Enable 8-bit samples across USB")
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parser.add_option( "--no-hb", action="store_true", default=False,
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help="don't use halfband filter in usrp")
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parser.add_option("-C", "--basic-complex", action="store_true", default=False,
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help="Use both inputs of a basicRX or LFRX as a single Complex input channel")
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parser.add_option("-D", "--basic-dualchan", action="store_true", default=False,
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help="Use both inputs of a basicRX or LFRX as seperate Real input channels")
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parser.add_option("-n", "--frame-decim", type="int", default=1,
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help="set oscope frame decimation factor to n [default=1]")
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parser.add_option("-I", "--audio-input", type="string", default="", help="pcm input device name. E.g., hw:0,0 or /dev/dsp")
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parser.add_option("-s", "--sample-rate", type="int", default=48000, help="sound card input sample rate")
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parser.add_option("-v", "--v-scale", type="eng_float", default=1000,
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help="set oscope initial V/div to SCALE [default=%default]")
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parser.add_option("-t", "--t-scale", type="eng_float", default=49e-6,
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help="set oscope initial s/div to SCALE [default=50us]")
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(options, args) = parser.parse_args()
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if len(args) != 0:
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parser.print_help()
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sys.exit(1)
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self.show_debug_info = True
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# build the graph
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self.num_inputs=1
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self.msgq = gr.msg_queue(2) # queue that holds a maximum of 2 messages
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if options.protocol == 0:
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# ---------- RD-LAP 19.2 kbps (9600 ksps), 25kHz channel,
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self.symbol_rate = 9600 # symbol rate; at 2 bits/symbol this corresponds to 19.2kbps
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self.channel_decimation = 1 # decimation (final rate should be at least several symbol rate)
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self.input_sample_rate = options.sample_rate / options.decim # for USRP: 64MHz / FPGA decimation rate
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self.protocol_processing = fsk4.rdlap_f(self.msgq, 0) # desired protocol processing block selected here
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self.channel_rate = self.input_sample_rate / self.channel_decimation
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# symbol shaping filter characteristics
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symbol_coeffs = gr.firdes.root_raised_cosine (1.0, # gain
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self.channel_rate , # sampling rate
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self.symbol_rate, # symbol rate
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0.2, # width of trans. band
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500) # filter type
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if options.protocol == 1:
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# ---------- APCO-25 C4FM Test Data
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self.symbol_rate = 4800 # symbol rate; at 2 bits/symbol this corresponds to 19.2kbps
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self.channel_decimation = 1 # decimation
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self.input_sample_rate = options.sample_rate / options.decim # for USRP: 64MHz / FPGA decimation rate
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self.protocol_processing = fsk4.apco25_f(self.msgq, 0)
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self.channel_rate = self.input_sample_rate / self.channel_decimation
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# symbol shaping filter
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symbol_coeffs = gr.firdes.root_raised_cosine (1.0, # gain
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self.channel_rate , # sampling rate
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self.symbol_rate, # symbol rate
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0.2, # width of trans. band
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500) # filter type
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# ----------------- End of setup block
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self.audio_input = audio.source(options.sample_rate, options.audio_input)
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self.audio_gain = gr.multiply_const_ff(options.gain)
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self.scope2 = scopesink2.scope_sink_f(panel, sample_rate=self.symbol_rate,
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frame_decim=1,
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v_scale=2,
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t_scale= 0.025,
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num_inputs=self.num_inputs)
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# also note:
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# this specifies the nominal frequency deviation for the 4-level fsk signal
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symbol_decim = 1
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self.symbol_filter = gr.fir_filter_fff (symbol_decim, symbol_coeffs)
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# eventually specify: sample rate, symbol rate
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self.demod_fsk4 = fsk4.demod_ff(self.msgq, self.channel_rate , self.symbol_rate)
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#self.rdlap_processing = fsk4.rdlap_f(self.msgq, 0)
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self.connect(self.audio_input, self.audio_gain, self.symbol_filter, self.demod_fsk4, self.protocol_processing)
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self.connect(self.demod_fsk4, self.scope2)
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# --------------- End of most of the 4L-FSK hack & slash
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self._build_gui(vbox)
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# set initial values
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self.set_gain(options.gain)
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if self.show_debug_info:
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# self.myform['decim'].set_value(self.u.decim_rate())
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self.myform['dbname'].set_value("alsa")
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self.myform['baseband'].set_value(0)
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self.myform['ddc'].set_value(0)
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if self.num_inputs==2:
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self.myform['baseband2'].set_value(0)
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self.myform['ddc2'].set_value(0)
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def _set_status_msg(self, msg):
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self.frame.GetStatusBar().SetStatusText(msg, 0)
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def _build_gui(self, vbox):
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def _form_set_freq(kv):
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return self.set_freq(kv['freq'])
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def _form_set_freq2(kv):
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return self.set_freq2(kv['freq2'])
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vbox.Add(self.scope2.win, 10, wx.EXPAND)
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# add control area at the bottom
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self.myform = myform = form.form()
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hbox = wx.BoxSizer(wx.HORIZONTAL)
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hbox.Add((5,0), 0, 0)
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myform['gain'] = form.slider_field(parent=self.panel, sizer=hbox, label="Gain",
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weight=3,
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min=1, max=150,
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callback=self.set_gain)
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hbox.Add((5,0), 0, 0)
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vbox.Add(hbox, 0, wx.EXPAND)
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self._build_subpanel(vbox)
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def _build_subpanel(self, vbox_arg):
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# build a secondary information panel (sometimes hidden)
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# FIXME figure out how to have this be a subpanel that is always
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# created, but has its visibility controlled by foo.Show(True/False)
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# def _form_set_decim(kv):
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# return self.set_decim(kv['decim'])
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if not(self.show_debug_info):
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return
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panel = self.panel
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vbox = vbox_arg
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myform = self.myform
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#panel = wx.Panel(self.panel, -1)
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#vbox = wx.BoxSizer(wx.VERTICAL)
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hbox = wx.BoxSizer(wx.HORIZONTAL)
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hbox.Add((5,0), 0)
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# myform['decim'] = form.int_field(
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# parent=panel, sizer=hbox, label="Decim",
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# callback=myform.check_input_and_call(_form_set_decim, self._set_status_msg))
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hbox.Add((5,0), 1)
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myform['fs@usb'] = form.static_float_field(
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parent=panel, sizer=hbox, label="Fs@USB")
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hbox.Add((5,0), 1)
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myform['dbname'] = form.static_text_field(
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parent=panel, sizer=hbox)
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hbox.Add((5,0), 1)
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myform['baseband'] = form.static_float_field(
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parent=panel, sizer=hbox, label="Analog BB")
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hbox.Add((5,0), 1)
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myform['ddc'] = form.static_float_field(
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parent=panel, sizer=hbox, label="DDC")
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if self.num_inputs==2:
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hbox.Add((1,0), 1)
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myform['baseband2'] = form.static_float_field(
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parent=panel, sizer=hbox, label="BB2")
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hbox.Add((1,0), 1)
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myform['ddc2'] = form.static_float_field(
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parent=panel, sizer=hbox, label="DDC2")
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hbox.Add((5,0), 0)
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vbox.Add(hbox, 0, wx.EXPAND)
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def set_gain(self, gain):
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self.myform['gain'].set_value(gain) # update displayed value
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self.audio_gain.set_k(gain)
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# def set_decim(self, decim):
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# ok = self.u.set_decim_rate(decim)
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# if not ok:
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# print "set_decim failed"
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# input_rate = self.u.adc_freq() / self.u.decim_rate()
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# self.scope.set_sample_rate(input_rate)
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# if self.show_debug_info: # update displayed values
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# self.myform['decim'].set_value(self.u.decim_rate())
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# self.myform['fs@usb'].set_value(self.u.adc_freq() / self.u.decim_rate())
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# return ok
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#-----------------------------------------------------------------------
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# Queue watcher. Dispatches measured delay to callback.
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#-----------------------------------------------------------------------
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class queue_watcher (threading.Thread):
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def __init__ (self, msgq, callback, **kwds):
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threading.Thread.__init__ (self, **kwds)
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self.setDaemon (1)
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self.msgq = msgq
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self.callback = callback
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self.keep_running = True
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self.start ()
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def run (self):
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while (self.keep_running):
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msg = self.msgq.delete_head() # blocking read of message queue
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frequency_correction = msg.arg1()
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self.callback(frequency_correction)
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def main ():
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app = stdgui2.stdapp( app_top_block, "USRP O'scope + 4LFSK", nstatus=1 )
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app.MainLoop()
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if __name__ == '__main__':
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main ()
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