#!/usr/bin/env python # # Copyright 2005,2006,2007,2009 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, modulation_utils from gnuradio import usrp from gnuradio import eng_notation from gnuradio.eng_option import eng_option from optparse import OptionParser import random import struct import sys # from current dir from receive_path import receive_path from pick_bitrate import pick_rx_bitrate import usrp_options try: from gnuradio.qtgui import qtgui from PyQt4 import QtGui, QtCore import sip except ImportError: print "Please install gr-qtgui." sys.exit(1) try: from qt_rx_window import Ui_DigitalWindow except ImportError: print "Error: could not find qt_rx_window.py:" print "\tYou must first build this from qt_rx_window.ui with the following command:" print "\t\ "pyuic4 qt_rx_window.ui -o qt_rx_window.py\"" sys.exit(1) #import os #print os.getpid() #raw_input('Attach and press enter: ') # //////////////////////////////////////////////////////////////////// # Define the QT Interface and Control Dialog # //////////////////////////////////////////////////////////////////// class dialog_box(QtGui.QMainWindow): def __init__(self, snkRxIn, snkRx, fg, parent=None): QtGui.QWidget.__init__(self, parent) self.gui = Ui_DigitalWindow() self.gui.setupUi(self) self.fg = fg self.set_frequency(self.fg.frequency()) self.set_gain(self.fg.gain()) self.set_decim(self.fg.decim()) self.set_gain_mu(self.fg.rx_gain_mu()) self.set_alpha(self.fg.rx_alpha()) # Add the qtsnk widgets to the hlayout box self.gui.sinkLayout.addWidget(snkRxIn) self.gui.sinkLayout.addWidget(snkRx) # Connect up some signals self.connect(self.gui.freqEdit, QtCore.SIGNAL("editingFinished()"), self.freqEditText) self.connect(self.gui.gainEdit, QtCore.SIGNAL("editingFinished()"), self.gainEditText) self.connect(self.gui.decimEdit, QtCore.SIGNAL("editingFinished()"), self.decimEditText) self.connect(self.gui.gainMuEdit, QtCore.SIGNAL("editingFinished()"), self.gainMuEditText) self.connect(self.gui.alphaEdit, QtCore.SIGNAL("editingFinished()"), self.alphaEditText) # Build a timer to update the packet number and PER fields self.update_delay = 250 # time between updating packet rate fields self.pkt_timer = QtCore.QTimer(self) self.connect(self.pkt_timer, QtCore.SIGNAL("timeout()"), self.updatePacketInfo) self.pkt_timer.start(self.update_delay) # Accessor functions for Gui to manipulate receiver parameters def set_frequency(self, fo): self.gui.freqEdit.setText(QtCore.QString("%1").arg(fo)) def set_gain(self, gain): self.gui.gainEdit.setText(QtCore.QString("%1").arg(gain)) def set_decim(self, decim): self.gui.decimEdit.setText(QtCore.QString("%1").arg(decim)) def set_gain_mu(self, gain): self.gui.gainMuEdit.setText(QtCore.QString("%1").arg(gain)) def set_alpha(self, alpha): self.gui.alphaEdit.setText(QtCore.QString("%1").arg(alpha)) def freqEditText(self): try: freq = self.gui.freqEdit.text().toDouble()[0] self.fg.set_freq(freq) except RuntimeError: pass def gainEditText(self): try: gain = self.gui.gainEdit.text().toDouble()[0] self.fg.set_gain(gain) except RuntimeError: pass def decimEditText(self): try: decim = self.gui.decimEdit.text().toInt()[0] self.fg.set_decim(decim) except RuntimeError: pass def alphaEditText(self): try: alpha = self.gui.alphaEdit.text().toDouble()[0] self.fg.set_rx_alpha(alpha) except RuntimeError: pass def gainMuEditText(self): try: gain = self.gui.gainMuEdit.text().toDouble()[0] self.fg.set_rx_gain_mu(gain) except RuntimeError: pass # Accessor function for packet error reporting def updatePacketInfo(self): # Pull these globals in from the main thread global n_rcvd, n_right, pktno per = float(n_rcvd - n_right)/float(pktno) self.gui.pktsRcvdEdit.setText(QtCore.QString("%1").arg(n_rcvd)) self.gui.pktsCorrectEdit.setText(QtCore.QString("%1").arg(n_right)) self.gui.perEdit.setText(QtCore.QString("%1").arg(per)) # //////////////////////////////////////////////////////////////////// # Define the GNU Radio Top Block # //////////////////////////////////////////////////////////////////// class my_top_block(gr.top_block): def __init__(self, demodulator, rx_callback, options): gr.top_block.__init__(self) self._rx_freq = options.rx_freq # receiver's center frequency self._rx_gain = options.rx_gain # receiver's gain self._rx_subdev_spec = options.rx_subdev_spec # daughterboard to use self._decim = options.decim # Decimating rate for the USRP (prelim) self._bitrate = options.bitrate self._samples_per_symbol = options.samples_per_symbol self._demod_class = demodulator self.gui_on = options.gui if self._rx_freq is None: sys.stderr.write("-f FREQ or --freq FREQ or --rx-freq FREQ must be specified\n") raise SystemExit # Set up USRP source self._setup_usrp_source(options) # copy the final answers back into options for use by demodulator options.samples_per_symbol = self._samples_per_symbol options.bitrate = self._bitrate options.decim = self._decim ok = self.set_freq(self._rx_freq) if not ok: print "Failed to set Rx frequency to %s" % (eng_notation.num_to_str(self._rx_freq)) raise ValueError, eng_notation.num_to_str(self._rx_freq) self.set_gain(options.rx_gain) # Set up receive path self.rxpath = receive_path(demodulator, rx_callback, options) # FIXME: do better exposure to lower issues for control self._gain_mu = self.rxpath.packet_receiver._demodulator._mm_gain_mu self._alpha = self.rxpath.packet_receiver._demodulator._costas_alpha self.connect(self.u, self.rxpath) if self.gui_on: self.qapp = QtGui.QApplication(sys.argv) fftsize = 2048 self.snk_rxin = qtgui.sink_c(fftsize, gr.firdes.WIN_BLACKMAN_hARRIS, -1/2, 1/2, "Received", True, True, False, True, True, False) self.snk_rx = qtgui.sink_c(fftsize, gr.firdes.WIN_BLACKMAN_hARRIS, -1/2, 1/2, "Post-Synchronizer", True, True, False, True, True, False) self.snk_rxin.set_frequency_axis(-60, 60) self.snk_rx.set_frequency_axis(-60, 20) self.snk_rxin.set_time_domain_axis(-2000,2000) # Connect to the QT sinks # FIXME: make better exposure to receiver from rxpath self.receiver = self.rxpath.packet_receiver._demodulator.receiver self.connect(self.u, self.snk_rxin) self.connect(self.receiver, self.snk_rx) pyRxInQt = self.snk_rxin.pyqwidget() pyRxIn = sip.wrapinstance(pyRxInQt, QtGui.QWidget) pyRxQt = self.snk_rx.pyqwidget() pyRx = sip.wrapinstance(pyRxQt, QtGui.QWidget) self.main_box = dialog_box(pyRxIn, pyRx, self) self.main_box.show() def _setup_usrp_source(self, options): self.u = usrp_options.create_usrp_source(options) adc_rate = self.u.adc_rate() self.u.set_decim(self._decim) (self._bitrate, self._samples_per_symbol, self._decim) = \ pick_rx_bitrate(self._bitrate, self._demod_class.bits_per_symbol(), \ self._samples_per_symbol, self._decim, adc_rate, \ self.u.get_decim_rates()) self.u.set_decim(self._decim) self.set_auto_tr(True) # enable Auto Transmit/Receive switching 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. """ return self.u.set_center_freq(target_freq) def set_gain(self, gain): """ Sets the analog gain in the USRP """ if gain is None: r = self.u.gain_range() gain = (r[0] + r[1])/2 # set gain to midpoint self._rx_gain = gain return self.u.set_gain(self._rx_gain) def set_auto_tr(self, enable): return self.u.set_auto_tr(enable) def set_decim(self, decim): self._decim = decim self.u.set_decim(self._decim) def frequency(self): return self._rx_freq def gain(self): return self._rx_gain def decim(self): return self._decim def rx_gain_mu(self): return self._gain_mu def rx_gain_omega(self): return self.gain_omega def set_rx_gain_mu(self, gain): self._gain_mu = gain self.gain_omega = .25 * self._gain_mu * self._gain_mu self.receiver.set_gain_mu(self._gain_mu) self.receiver.set_gain_omega(self.gain_omega) def rx_alpha(self): return self._alpha def rx_beta(self): return self.beta def set_rx_alpha(self, alpha): self._alpha = alpha self.beta = .25 * self._alpha * self._alpha self.receiver.set_alpha(self._alpha) self.receiver.set_beta(self.beta) def add_options(normal, expert): """ Adds usrp-specific options to the Options Parser """ add_freq_option(normal) normal.add_option("-R", "--rx-subdev-spec", type="subdev", default=None, help="select USRP Rx side A or B") normal.add_option("", "--rx-gain", type="eng_float", default=None, metavar="GAIN", help="set receiver gain in dB [default=midpoint]. See also --show-rx-gain-range") normal.add_option("", "--show-rx-gain-range", action="store_true", default=False, help="print min and max Rx gain available on selected daughterboard") normal.add_option("-v", "--verbose", action="store_true", default=False) normal.add_option("-G", "--gui", action="store_true", default=False, help="Turn on the GUI [default=%default]") expert.add_option("", "--rx-freq", type="eng_float", default=None, help="set Rx frequency to FREQ [default=%default]", metavar="FREQ") expert.add_option("-d", "--decim", type="intx", default=128, help="set fpga decimation rate to DECIM [default=%default]") expert.add_option("", "--snr", type="eng_float", default=30, help="set the SNR of the channel in dB [default=%default]") # Make a static method to call before instantiation add_options = staticmethod(add_options) def add_freq_option(parser): """ Hackery that has the -f / --freq option set both tx_freq and rx_freq """ def freq_callback(option, opt_str, value, parser): parser.values.rx_freq = value parser.values.tx_freq = value if not parser.has_option('--freq'): parser.add_option('-f', '--freq', type="eng_float", action="callback", callback=freq_callback, help="set Tx and/or Rx frequency to FREQ [default=%default]", metavar="FREQ") # ///////////////////////////////////////////////////////////////////////////// # main # ///////////////////////////////////////////////////////////////////////////// global n_rcvd, n_right def main(): global n_rcvd, n_right, pktno n_rcvd = 0 n_right = 0 pktno = 1 def rx_callback(ok, payload): global n_rcvd, n_right, pktno (pktno,) = struct.unpack('!H', payload[0:2]) n_rcvd += 1 if ok: n_right += 1 if not options.gui: print "ok = %5s pktno = %4d n_rcvd = %4d n_right = %4d" % ( ok, pktno, n_rcvd, n_right) demods = modulation_utils.type_1_demods() # Create Options Parser: parser = OptionParser (option_class=eng_option, conflict_handler="resolve") expert_grp = parser.add_option_group("Expert") parser.add_option("-m", "--modulation", type="choice", choices=demods.keys(), default='dbpsk', help="Select modulation from: %s [default=%%default]" % (', '.join(demods.keys()),)) my_top_block.add_options(parser, expert_grp) receive_path.add_options(parser, expert_grp) usrp_options.add_rx_options(parser) for mod in demods.values(): mod.add_options(expert_grp) (options, args) = parser.parse_args () if len(args) != 0: parser.print_help(sys.stderr) sys.exit(1) if options.rx_freq is None: sys.stderr.write("You must specify -f FREQ or --freq FREQ\n") parser.print_help(sys.stderr) sys.exit(1) # build the graph tb = my_top_block(demods[options.modulation], rx_callback, options) r = gr.enable_realtime_scheduling() if r != gr.RT_OK: print "Warning: Failed to enable realtime scheduling." tb.start() # start flow graph if(options.gui): tb.qapp.exec_() else: tb.wait() # wait for it to finish if __name__ == '__main__': try: main() except KeyboardInterrupt: pass