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op25-legacy/python/usrp_p25_rx.py

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#!/usr/bin/env python
# -*- mode: Python -*-
# Copyright 2008-2011 Steve Glass
#
# This file is part of OP25.
#
# OP25 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.
#
# OP25 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 OP25; see the file COPYING. If not, write to the Free
# Software Foundation, Inc., 51 Franklin Street, Boston, MA
# 02110-1301, USA.
import os
import sys
import threading
import wx
import wx.html
import wx.wizard
from gnuradio import audio, eng_notation, gr, gru
from gnuradio.eng_option import eng_option
from gnuradio.wxgui import stdgui2, fftsink2, scopesink2
from math import pi
from optparse import OptionParser
import pickle
# Python is doing strange things to our packages
# So we try to handle it here
#
try:
from gnuradio import op25
except Exception:
import op25
# The P25 receiver
#
class p25_rx_block (stdgui2.std_top_block):
# Initialize the P25 receiver
#
def __init__(self, frame, panel, vbox, argv):
stdgui2.std_top_block.__init__(self, frame, panel, vbox, argv)
# do we have a USRP?
try:
self.usrp = None
from gnuradio import usrp
self.usrp = usrp.source_c()
except Exception:
ignore = True
# setup (read-only) attributes
self.channel_rate = 125000
self.symbol_rate = 4800
self.symbol_deviation = 600.0
# keep track of flow graph connections
self.cnxns = []
# initialize the UI
#
self.__init_gui(frame, panel, vbox)
# command line argument parsing
parser = OptionParser(option_class=eng_option)
parser.add_option("-R", "--rx-subdev-spec", type="subdev", default=(1, 0), help="select USRP Rx side A or B")
parser.add_option("-d", "--decim", type="int", default=256, help="source decimation factor")
parser.add_option("-f", "--frequency", type="eng_float", default=None, help="USRP center frequency", metavar="Hz")
parser.add_option("-g", "--gain", type="eng_float", default=None, help="set USRP gain in dB (default is midpoint)")
parser.add_option("-i", "--input", default=None, help="input file name")
parser.add_option("-w", "--wait", action="store_true", default=False, help="block on startup")
parser.add_option("-t", "--transient", action="store_true", default=False, help="enable transient captures")
(options, args) = parser.parse_args()
if len(args) != 0:
parser.print_help()
sys.exit(1)
self.options = options
# wait for gdb
if options.wait:
print 'Ready for GDB to attach (pid = %d)' % (os.getpid(),)
raw_input("Press 'Enter' to continue...")
# configure specified data source
if options.input:
self.open_file(options.input)
elif options.frequency:
self._set_state("CAPTURING")
self.open_usrp(options.rx_subdev_spec, options.decim, options.gain, options.frequency, not options.transient)
else:
self._set_state("STOPPED")
# save cmd-line options
self.options = options
# setup common flow graph elements
#
def __build_graph(self, source, capture_rate):
# tell the scope the source rate
self.spectrum.set_sample_rate(capture_rate)
# channel filter
self.channel_offset = 0.0
channel_decim = capture_rate // self.channel_rate
channel_rate = capture_rate // channel_decim
trans_width = 12.5e3 / 2;
trans_centre = trans_width + (trans_width / 2)
coeffs = gr.firdes.low_pass(1.0, capture_rate, trans_centre, trans_width, gr.firdes.WIN_HANN)
self.channel_filter = gr.freq_xlating_fir_filter_ccf(channel_decim, coeffs, 0.0, capture_rate)
self.set_channel_offset(0.0, 0, self.spectrum.win._units)
# power squelch
squelch_db = 0
self.squelch = gr.pwr_squelch_cc(squelch_db, 1e-3, 0, True)
self.set_squelch_threshold(squelch_db)
# FM demodulator
fm_demod_gain = channel_rate / (2.0 * pi * self.symbol_deviation)
fm_demod = gr.quadrature_demod_cf(fm_demod_gain)
# symbol filter
symbol_decim = 1
# symbol_coeffs = gr.firdes.root_raised_cosine(1.0, channel_rate, self.symbol_rate, 0.2, 500)
# boxcar coefficients for "integrate and dump" filter
samples_per_symbol = channel_rate // self.symbol_rate
symbol_coeffs = (1.0/samples_per_symbol,)*samples_per_symbol
symbol_filter = gr.fir_filter_fff(symbol_decim, symbol_coeffs)
# C4FM demodulator
autotuneq = gr.msg_queue(2)
self.demod_watcher = demod_watcher(autotuneq, self.adjust_channel_offset)
demod_fsk4 = op25.fsk4_demod_ff(autotuneq, channel_rate, self.symbol_rate)
# symbol slicer
levels = [ -2.0, 0.0, 2.0, 4.0 ]
slicer = op25.fsk4_slicer_fb(levels)
# ALSA output device (if not locked)
try:
sink = audio.sink(8000, "plughw:0,0", True) # ToDo: get actual device from prefs
except Exception:
sink = gr.null_sink(gr.sizeof_float)
# connect it all up
self.__connect([[source, self.channel_filter, self.squelch, fm_demod, symbol_filter, demod_fsk4, slicer, self.p25_decoder, sink],
[source, self.spectrum],
[symbol_filter, self.signal_scope],
[demod_fsk4, self.symbol_scope]])
# Connect up the flow graph
#
def __connect(self, cnxns):
for l in cnxns:
for b in l:
if b == l[0]:
p = l[0]
else:
self.connect(p, b)
p = b
self.cnxns.extend(cnxns)
# Disconnect the flow graph
#
def __disconnect(self):
for l in self.cnxns:
for b in l:
if b == l[0]:
p = l[0]
else:
self.disconnect(p, b)
p = b
self.cnxns = []
# initialize the UI
#
def __init_gui(self, frame, panel, vbox):
self.frame = frame
self.frame.CreateStatusBar()
self.panel = panel
self.vbox = vbox
# setup the menu bar
menubar = self.frame.GetMenuBar()
# setup the "File" menu
file_menu = menubar.GetMenu(0)
self.file_new = file_menu.Insert(0, wx.ID_NEW)
self.frame.Bind(wx.EVT_MENU, self._on_file_new, self.file_new)
self.file_open = file_menu.Insert(1, wx.ID_OPEN)
self.frame.Bind(wx.EVT_MENU, self._on_file_open, self.file_open)
file_menu.InsertSeparator(2)
self.file_properties = file_menu.Insert(3, wx.ID_PROPERTIES)
self.frame.Bind(wx.EVT_MENU, self._on_file_properties, self.file_properties)
file_menu.InsertSeparator(4)
self.file_close = file_menu.Insert(5, wx.ID_CLOSE)
self.frame.Bind(wx.EVT_MENU, self._on_file_close, self.file_close)
# setup the "Edit" menu
if False:
edit_menu = wx.Menu()
self.edit_undo = edit_menu.Insert(0, wx.ID_UNDO)
self.frame.Bind(wx.EVT_MENU, self._on_edit_undo, self.edit_undo)
self.edit_redo = edit_menu.Insert(1, wx.ID_REDO)
self.frame.Bind(wx.EVT_MENU, self._on_edit_redo, self.edit_redo)
edit_menu.InsertSeparator(2)
self.edit_cut = edit_menu.Insert(3, wx.ID_CUT)
self.frame.Bind(wx.EVT_MENU, self._on_edit_cut, self.edit_cut)
self.edit_copy = edit_menu.Insert(4, wx.ID_COPY)
self.frame.Bind(wx.EVT_MENU, self._on_edit_copy, self.edit_copy)
self.edit_paste = edit_menu.Insert(5, wx.ID_PASTE)
self.frame.Bind(wx.EVT_MENU, self._on_edit_paste, self.edit_paste)
self.edit_delete = edit_menu.Insert(6, wx.ID_DELETE)
self.frame.Bind(wx.EVT_MENU, self._on_edit_delete, self.edit_delete)
edit_menu.InsertSeparator(7)
self.edit_select_all = edit_menu.Insert(8, wx.ID_SELECTALL)
self.frame.Bind(wx.EVT_MENU, self._on_edit_select_all, self.edit_select_all)
edit_menu.InsertSeparator(9)
self.edit_prefs = edit_menu.Insert(10, wx.ID_PREFERENCES)
self.frame.Bind(wx.EVT_MENU, self._on_edit_prefs, self.edit_prefs)
menubar.Append(edit_menu, "&Edit"); # ToDo use wx.ID_EDIT stuff
# setup the toolbar
if True:
self.toolbar = wx.ToolBar(frame, -1, style = wx.TB_DOCKABLE | wx.TB_HORIZONTAL)
frame.SetToolBar(self.toolbar)
icon_size = wx.Size(24, 24)
new_icon = wx.ArtProvider.GetBitmap(wx.ART_NEW, wx.ART_TOOLBAR, icon_size)
toolbar_new = self.toolbar.AddSimpleTool(wx.ID_NEW, new_icon, "New Capture")
open_icon = wx.ArtProvider.GetBitmap(wx.ART_FILE_OPEN, wx.ART_TOOLBAR, icon_size)
toolbar_open = self.toolbar.AddSimpleTool(wx.ID_OPEN, open_icon, "Open")
#
# self.toolbar.AddSeparator()
# self.gain_control = wx.Slider(self.toolbar, 100, 50, 1, 100, style=wx.SL_HORIZONTAL)
# slider.SetTickFreq(5, 1)
# self.toolbar.AddControl(self.gain_control)
#
self.toolbar.Realize()
else:
self.toolbar = None
# setup the notebook
self.notebook = wx.Notebook(self.panel)
self.vbox.Add(self.notebook, 1, wx.EXPAND)
# add spectrum scope
self.spectrum = fftsink2.fft_sink_c(self.notebook, fft_size=512, average=True, peak_hold=True)
self.spectrum_plotter = self.spectrum.win.plot
## self.spectrum_plotter = self.spectrum.win.plotter # opengl
self.spectrum_plotter.Bind(wx.EVT_LEFT_DOWN, self._on_spectrum_left_click)
self.notebook.AddPage(self.spectrum.win, "RF Spectrum")
# add C4FM scope
self.signal_scope = scopesink2.scope_sink_f(self.notebook, sample_rate = self.channel_rate, v_scale=5, t_scale=0.001)
self.signal_plotter = self.signal_scope.win.graph
## self.signal_plotter = self.signal_scope.win
self.notebook.AddPage(self.signal_scope.win, "C4FM Signal")
# add symbol scope
self.symbol_scope = scopesink2.scope_sink_f(self.notebook, frame_decim=1, sample_rate=self.symbol_rate, v_scale=1, t_scale=0.05)
self.symbol_plotter = self.symbol_scope.win.graph
## self.symbol_plotter = self.symbol_scope.win
self.symbol_scope.win.set_format_plus()
self.notebook.AddPage(self.symbol_scope.win, "Demodulated Symbols")
# Traffic snapshot
self.traffic = TrafficPane(self.notebook)
self.notebook.AddPage(self.traffic, "Traffic")
# Setup the decoder and report the TUN/TAP device name
self.p25_decoder = op25.decoder_bf()
self.decode_watcher = decode_watcher(msgq, self.traffic)
self.p25_decoder.set_msgq(gr.msg_queue(2))
self.frame.SetStatusText("Destination: " + self.p25_decoder.destination())
# read capture file properties (decimation etc.)
#
def __read_file_properties(self, filename):
f = open(filename, "r")
self.info = pickle.load(f)
f.close()
# Setup to rx from file
#
def __set_rx_from_file(self, filename, capture_rate):
file = gr.file_source(gr.sizeof_gr_complex, filename, True)
throttle = gr.throttle(gr.sizeof_gr_complex, capture_rate)
self.__connect([[file, throttle]])
self.__build_graph(throttle, capture_rate)
# setup to rx from USRP
#
def __set_rx_from_usrp(self, subdev_spec, decimation_rate, gain, frequency, preserve):
from gnuradio import usrp
# setup USRP
self.usrp.set_decim_rate(decimation_rate)
if subdev_spec is None:
subdev_spec = usrp.pick_rx_subdevice(self.usrp)
self.usrp.set_mux(usrp.determine_rx_mux_value(self.usrp, subdev_spec))
subdev = usrp.selected_subdev(self.usrp, subdev_spec)
capture_rate = self.usrp.adc_freq() / self.usrp.decim_rate()
self.info["capture-rate"] = capture_rate
if gain is None:
g = subdev.gain_range()
gain = float(g[0]+g[1])/2
subdev.set_gain(gain)
r = self.usrp.tune(0, subdev, frequency)
if not r:
raise RuntimeError("failed to set USRP frequency")
# capture file
if preserve:
try:
self.capture_filename = os.tmpnam()
except RuntimeWarning:
ignore = True
capture_file = gr.file_sink(gr.sizeof_gr_complex, self.capture_filename)
self.__connect([[self.usrp, capture_file]])
else:
self.capture_filename = None
# everything else
self.__build_graph(self.usrp, capture_rate)
# Change the UI state
#
def _set_state(self, new_state):
self.state = new_state
if "STOPPED" == self.state:
# menu items
can_capture = self.usrp is not None
self.file_new.Enable(can_capture)
self.file_open.Enable(True)
self.file_properties.Enable(False)
self.file_close.Enable(False)
# toolbar
if self.toolbar:
self.toolbar.EnableTool(wx.ID_NEW, can_capture)
self.toolbar.EnableTool(wx.ID_OPEN, True)
# Visually reflect "no file"
self.frame.SetStatusText("", 1)
self.frame.SetStatusText("", 2)
self.spectrum_plotter.Clear()
self.signal_plotter.Clear()
self.symbol_plotter.Clear()
self.traffic.clear()
elif "RUNNING" == self.state:
# menu items
self.file_new.Enable(False)
self.file_open.Enable(False)
self.file_properties.Enable(True)
self.file_close.Enable(True)
# toolbar
if self.toolbar:
self.toolbar.EnableTool(wx.ID_NEW, False)
self.toolbar.EnableTool(wx.ID_OPEN, False)
elif "CAPTURING" == self.state:
# menu items
self.file_new.Enable(False)
self.file_open.Enable(False)
self.file_properties.Enable(True)
self.file_close.Enable(True)
# toolbar
if self.toolbar:
self.toolbar.EnableTool(wx.ID_NEW, False)
self.toolbar.EnableTool(wx.ID_OPEN, False)
# Append filename to standard title bar
#
def _set_titlebar(self, filename):
ToDo = True
# Write capture file properties
#
def __write_file_properties(self, filename):
f = open(filename, "w")
pickle.dump(self.info, f)
f.close()
# Adjust the channel offset
#
def adjust_channel_offset(self, delta_hz):
max_delta_hz = 12000.0
delta_hz *= self.symbol_deviation
delta_hz = max(delta_hz, -max_delta_hz)
delta_hz = min(delta_hz, max_delta_hz)
self.channel_filter.set_center_freq(self.channel_offset - delta_hz)
# Close an open file
#
def _on_file_close(self, event):
self.stop()
self.wait()
self.__disconnect()
if "CAPTURING" == self.state and self.capture_filename:
dialog = wx.MessageDialog(self.frame, "Save capture file before closing?", style=wx.YES_NO | wx.YES_DEFAULT | wx.ICON_QUESTION)
if wx.ID_YES == dialog.ShowModal():
save_dialog = wx.FileDialog(self.frame, "Save capture file as:", wildcard="*.dat", style=wx.SAVE|wx.OVERWRITE_PROMPT)
if save_dialog.ShowModal() == wx.ID_OK:
path = str(save_dialog.GetPath())
save_dialog.Destroy()
os.rename(self.capture_filename, path)
self.__write_file_properties(path + ".info")
else:
os.remove(self.capture_filename)
self.capture_filename = None
self._set_state("STOPPED")
# New capture from USRP
#
def _on_file_new(self, event):
# wizard = wx.wizard.Wizard(self.frame, -1, "New Capture from USRP")
# page1 = wizard_intro_page(wizard)
# page2 = wizard_details_page(wizard)
# page3 = wizard_preserve_page(wizard)
# page4 = wizard_finish_page(wizard)
# wx.wizard.WizardPageSimple_Chain(page1, page2)
# wx.wizard.WizardPageSimple_Chain(page2, page3)
# wx.wizard.WizardPageSimple_Chain(page3, page4)
# wizard.FitToPage(page1)
# if wizard.RunWizard(page1):
self.stop()
self.wait()
# ToDo: get open_usrp() arguments from wizard
self.open_usrp(self.options.rx_subdev_spec, self.options.decim, self.options.gain, self.options.frequency, not self.options.transient)
self.start()
# Open an existing capture
#
def _on_file_open(self, event):
dialog = wx.FileDialog(self.frame, "Choose a capture file:", wildcard="*.dat", style=wx.OPEN)
if dialog.ShowModal() == wx.ID_OK:
file = str(dialog.GetPath())
dialog.Destroy()
self.stop()
self.wait()
self.open_file(file)
self.start()
# Present file properties dialog
#
def _on_file_properties(self, event):
# ToDo: show what info we have about the capture file (name,
# capture source, capture rate, date(?), size(?),)
todo = True
# Undo the last edit
#
def _on_edit_undo(self, event):
todo = True
# Redo the edit
#
def _on_edit_redo(self, event):
todo = True
# Cut the current selection
#
def _on_edit_cut(self, event):
todo = True
# Copy the current selection
#
def _on_edit_copy(self, event):
todo = True
# Paste into the current sample
#
def _on_edit_paste(self, event):
todo = True
# Delete the current selection
#
def _on_edit_delete(self, event):
todo = True
# Select all
#
def _on_edit_select_all(self, event):
todo = True
# Open the preferences dialog
#
def _on_edit_prefs(self, event):
todo = True
# Set channel offset and RF squelch threshold
#
def _on_spectrum_left_click(self, event):
if "STOPPED" != self.state:
# set frequency
x,y = self.spectrum_plotter.GetXY(event)
xmin, xmax = self.spectrum_plotter.GetXCurrentRange()
x = min(x, xmax)
x = max(x, xmin)
scale_factor = self.spectrum.win._scale_factor
chan_width = 6.25e3
x /= scale_factor
x += chan_width / 2
x = (x // chan_width) * chan_width
self.set_channel_offset(x, scale_factor, self.spectrum.win._units)
# set squelch threshold
ymin, ymax = self.spectrum_plotter.GetYCurrentRange()
y = min(y, ymax)
y = max(y, ymin)
squelch_increment = 5
y += squelch_increment / 2
y = (y // squelch_increment) * squelch_increment
self.set_squelch_threshold(int(y))
# Open an existing capture file
#
def open_file(self, capture_file):
try:
self.__read_file_properties(capture_file + ".info")
capture_rate = self.info["capture-rate"]
self.__set_rx_from_file(capture_file, capture_rate)
self._set_titlebar(capture_file)
self._set_state("RUNNING")
except Exception, x:
wx.MessageBox("Cannot open capture file: " + str(x), "File Open Error", wx.CANCEL | wx.ICON_EXCLAMATION)
# Open the USRP
#
def open_usrp(self, subdev_spec, decim, gain, frequency, preserve):
try:
self.info = {
"capture-rate": "unknown",
"center-freq": frequency,
"source-dev": "USRP",
"source-decim": decim }
self.__set_rx_from_usrp(subdev_spec, decim, gain, frequency, preserve)
self._set_titlebar("Capturing")
self._set_state("CAPTURING")
except Exception, x:
wx.MessageBox("Cannot open USRP: " + x.message, "USRP Error", wx.CANCEL | wx.ICON_EXCLAMATION)
# Set the channel offset
#
def set_channel_offset(self, offset_hz, scale, units):
self.channel_offset = -offset_hz
self.channel_filter.set_center_freq(self.channel_offset)
self.frame.SetStatusText("Channel offset: " + str(offset_hz * scale) + units, 1)
# Set the RF squelch threshold level
#
def set_squelch_threshold(self, squelch_db):
self.squelch.set_threshold(squelch_db)
self.frame.SetStatusText("Squelch: " + str(squelch_db) + "dB", 2)
# A snapshot of important fields in current traffic
#
class TrafficPane(wx.Panel):
# Initializer
#
def __init__(self, parent):
wx.Panel.__init__(self, parent)
sizer = wx.GridBagSizer(hgap=10, vgap=10)
self.fields = {}
label = wx.StaticText(self, -1, "DUID:")
sizer.Add(label, pos=(1,1))
field = wx.TextCtrl(self, -1, "", size=(72, -1), style=wx.TE_READONLY)
sizer.Add(field, pos=(1,2))
self.fields["duid"] = field;
label = wx.StaticText(self, -1, "NAC:")
sizer.Add(label, pos=(2,1))
field = wx.TextCtrl(self, -1, "", size=(72, -1), style=wx.TE_READONLY)
sizer.Add(field, pos=(2,2))
self.fields["nac"] = field;
label = wx.StaticText(self, -1, "Source:")
sizer.Add(label, pos=(3,1))
field = wx.TextCtrl(self, -1, "", size=(175, -1), style=wx.TE_READONLY)
sizer.Add(field, pos=(3,2))
self.fields["source"] = field;
label = wx.StaticText(self, -1, "Destination:")
sizer.Add(label, pos=(4,1))
field = wx.TextCtrl(self, -1, "", size=(175, -1), style=wx.TE_READONLY)
sizer.Add(field, pos=(4,2))
self.fields["dest"] = field;
# label = wx.StaticText(self, -1, "ToDo:")
# sizer.Add(label, pos=(5,1))
# field = wx.TextCtrl(self, -1, "", size=(175, -1), style=wx.TE_READONLY)
# sizer.Add(field, pos=(5,2))
# self.fields["nid"] = field;
label = wx.StaticText(self, -1, "MFID:")
sizer.Add(label, pos=(1,4))
field = wx.TextCtrl(self, -1, "", size=(175, -1), style=wx.TE_READONLY)
sizer.Add(field, pos=(1,5))
self.fields["mfid"] = field;
label = wx.StaticText(self, -1, "ALGID:")
sizer.Add(label, pos=(2,4))
field = wx.TextCtrl(self, -1, "", size=(175, -1), style=wx.TE_READONLY)
sizer.Add(field, pos=(2,5))
self.fields["algid"] = field;
label = wx.StaticText(self, -1, "KID:")
sizer.Add(label, pos=(3,4))
field = wx.TextCtrl(self, -1, "", size=(72, -1), style=wx.TE_READONLY)
sizer.Add(field, pos=(3,5))
self.fields["kid"] = field;
label = wx.StaticText(self, -1, "MI:")
sizer.Add(label, pos=(4,4))
field = wx.TextCtrl(self, -1, "", size=(216, -1), style=wx.TE_READONLY)
sizer.Add(field, pos=(4,5))
self.fields["mi"] = field;
label = wx.StaticText(self, -1, "TGID:")
sizer.Add(label, pos=(5,4))
field = wx.TextCtrl(self, -1, "", size=(72, -1), style=wx.TE_READONLY)
sizer.Add(field, pos=(5,5))
self.fields["tgid"] = field;
self.SetSizer(sizer)
self.Fit()
# Clear the field values
#
def clear(self):
for v in self.fields.values():
v.Clear()
# Update the field values
#
def update(self, field_values):
if field_values['duid'] == 'hdu':
self.clear()
for k,v in self.fields.items():
f = field_values.get(k, None)
if f:
v.SetValue(f)
# Introduction page for USRP capture wizard
#
class wizard_intro_page(wx.wizard.WizardPageSimple):
# Initializer
#
def __init__(self, parent):
wx.wizard.WizardPageSimple.__init__(self, parent)
html = wx.html.HtmlWindow(self)
html.SetPage('''
<html>
<body>
<h1>Capture from USRP</h1>
<p>
We will guide you through the process of capturing a sample from the USRP.
Please ensure that the USRP is switched on and connected to this computer.
</p>
</body>
</html>
''')
sizer = wx.BoxSizer(wx.VERTICAL)
self.SetSizer(sizer)
sizer.Add(html, 1, wx.ALIGN_CENTER | wx.EXPAND | wx.FIXED_MINSIZE)
# USRP wizard details page
#
class wizard_details_page(wx.wizard.WizardPageSimple):
# Initializer
#
def __init__(self, parent):
wx.wizard.WizardPageSimple.__init__(self, parent)
sizer = wx.BoxSizer(wx.VERTICAL)
self.SetSizer(sizer)
# Return a tuple containing the subdev_spec, gain, frequency, decimation factor
#
def get_details(self):
ToDo = True
# Frequency tracker
#
class demod_watcher(threading.Thread):
def __init__(self, msgq, callback, **kwds):
threading.Thread.__init__ (self, **kwds)
self.setDaemon(1)
self.msgq = msgq
self.callback = callback
self.keep_running = True
self.start()
def run(self):
while(self.keep_running):
msg = self.msgq.delete_head()
frequency_correction = msg.arg1()
self.callback(frequency_correction)
# Decoder watcher
#
class decode_watcher(threading.Thread):
def __init__(self, msgq, traffic_pane, **kwds):
threading.Thread.__init__ (self, **kwds)
self.setDaemon(1)
self.msgq = msgq
self.traffic_pane = traffic_pane
self.keep_running = True
self.start()
def run(self):
while(self.keep_running):
msg = self.msgq.delete_head()
pickled_dict = msg.to_string()
attrs = pickle.loads(pickled_dict)
self.traffic_pane.update(attrs)
# Start the receiver
#
if '__main__' == __name__:
app = stdgui2.stdapp(p25_rx_block, "APCO P25 Receiver", 3)
app.MainLoop()