diff options
Diffstat (limited to 'gr-digital/examples')
| -rw-r--r-- | gr-digital/examples/.gitignore | 2 | ||||
| -rw-r--r-- | gr-digital/examples/Makefile.am | 30 | ||||
| -rwxr-xr-x | gr-digital/examples/benchmark_rx.py | 124 | ||||
| -rwxr-xr-x | gr-digital/examples/benchmark_tx.py | 146 | ||||
| -rw-r--r-- | gr-digital/examples/receive_path.py | 140 | ||||
| -rw-r--r-- | gr-digital/examples/transmit_path.py | 119 |
6 files changed, 561 insertions, 0 deletions
diff --git a/gr-digital/examples/.gitignore b/gr-digital/examples/.gitignore new file mode 100644 index 000000000..b336cc7ce --- /dev/null +++ b/gr-digital/examples/.gitignore @@ -0,0 +1,2 @@ +/Makefile +/Makefile.in diff --git a/gr-digital/examples/Makefile.am b/gr-digital/examples/Makefile.am new file mode 100644 index 000000000..8ed53fe41 --- /dev/null +++ b/gr-digital/examples/Makefile.am @@ -0,0 +1,30 @@ +# +# Copyright 2011 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. +# + +include $(top_srcdir)/Makefile.common + +ourdatadir = $(exampledir)/digital + +dist_ourdata_SCRIPTS = \ + transmit_path.py \ + receive_path.py + + diff --git a/gr-digital/examples/benchmark_rx.py b/gr-digital/examples/benchmark_rx.py new file mode 100755 index 000000000..9d8734e3d --- /dev/null +++ b/gr-digital/examples/benchmark_rx.py @@ -0,0 +1,124 @@ +#!/usr/bin/env python +# +# Copyright 2010,2011 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 +from gnuradio import usrp +from gnuradio import eng_notation +from gnuradio.eng_option import eng_option +from optparse import OptionParser + +# From gr-digital +from gnuradio import digital + +# from current dir +from receive_path import receive_path + +import random +import struct +import sys + +#import os +#print os.getpid() +#raw_input('Attach and press enter: ') + +class my_top_block(gr.top_block): + def __init__(self, demodulator, rx_callback, options): + gr.top_block.__init__(self) + + # Set up receive path + self.rxpath = receive_path(demodulator, rx_callback, options) + + if(options.from_file is not None): + self.source = gr.file_source(gr.sizeof_gr_complex, options.from_file) + else: + self.source = gr.null_source(gr.sizeof_gr_complex) + + self.connect(self.source, self.rxpath) + +# ///////////////////////////////////////////////////////////////////////////// +# main +# ///////////////////////////////////////////////////////////////////////////// + +global n_rcvd, n_right + +def main(): + global n_rcvd, n_right + + n_rcvd = 0 + n_right = 0 + + def rx_callback(ok, payload): + global n_rcvd, n_right + (pktno,) = struct.unpack('!H', payload[0:2]) + n_rcvd += 1 + if ok: + n_right += 1 + + print "ok = %5s pktno = %4d n_rcvd = %4d n_right = %4d" % ( + ok, pktno, n_rcvd, n_right) + + demods = digital.modulation_utils2.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='psk', + help="Select modulation from: %s [default=%%default]" + % (', '.join(demods.keys()),)) + parser.add_option("","--from-file", default=None, + help="input file of samples to demod") + + receive_path.add_options(parser, expert_grp) + + 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.from_file is None: + 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 + tb.wait() # wait for it to finish + +if __name__ == '__main__': + try: + main() + except KeyboardInterrupt: + pass diff --git a/gr-digital/examples/benchmark_tx.py b/gr-digital/examples/benchmark_tx.py new file mode 100755 index 000000000..01902c0e3 --- /dev/null +++ b/gr-digital/examples/benchmark_tx.py @@ -0,0 +1,146 @@ +#!/usr/bin/env python +# +# Copyright 2010 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 +from gnuradio import usrp +from gnuradio import eng_notation +from gnuradio.eng_option import eng_option +from optparse import OptionParser + +# From gr-digital +from gnuradio import digital + +# from current dir +from transmit_path import transmit_path + +import random, time, struct, sys + +#import os +#print os.getpid() +#raw_input('Attach and press enter') + +class my_top_block(gr.top_block): + def __init__(self, modulator, options): + gr.top_block.__init__(self) + + self.txpath = transmit_path(modulator, options) + + if(options.to_file is not None): + self.sink = gr.file_sink(gr.sizeof_gr_complex, options.to_file) + else: + self.sink = gr.null_sink(gr.sizeof_gr_complex) + + self.connect(self.txpath, self.sink) + +# ///////////////////////////////////////////////////////////////////////////// +# main +# ///////////////////////////////////////////////////////////////////////////// + +def main(): + + def send_pkt(payload='', eof=False): + return tb.txpath.send_pkt(payload, eof) + + def rx_callback(ok, payload): + print "ok = %r, payload = '%s'" % (ok, payload) + + mods = digital.modulation_utils2.type_1_mods() + + parser = OptionParser(option_class=eng_option, conflict_handler="resolve") + expert_grp = parser.add_option_group("Expert") + + parser.add_option("-m", "--modulation", type="choice", choices=mods.keys(), + default='psk', + help="Select modulation from: %s [default=%%default]" + % (', '.join(mods.keys()),)) + + parser.add_option("-s", "--size", type="eng_float", default=1500, + help="set packet size [default=%default]") + parser.add_option("-M", "--megabytes", type="eng_float", default=1.0, + help="set megabytes to transmit [default=%default]") + parser.add_option("","--discontinuous", action="store_true", default=False, + help="enable discontinous transmission (bursts of 5 packets)") + parser.add_option("","--from-file", default=None, + help="use intput file for packet contents") + parser.add_option("","--to-file", default=None, + help="Output file for modulated samples") + + transmit_path.add_options(parser, expert_grp) + + for mod in mods.values(): + mod.add_options(expert_grp) + + (options, args) = parser.parse_args () + + if len(args) != 0: + parser.print_help() + sys.exit(1) + + if options.to_file is None: + if options.tx_freq is None: + sys.stderr.write("You must specify -f FREQ or --freq FREQ\n") + parser.print_help(sys.stderr) + sys.exit(1) + + if options.from_file is not None: + source_file = open(options.from_file, 'r') + + # build the graph + tb = my_top_block(mods[options.modulation], options) + + r = gr.enable_realtime_scheduling() + if r != gr.RT_OK: + print "Warning: failed to enable realtime scheduling" + + tb.start() # start flow graph + + # generate and send packets + nbytes = int(1e6 * options.megabytes) + n = 0 + pktno = 0 + pkt_size = int(options.size) + + while n < nbytes: + if options.from_file is None: + data = (pkt_size - 2) * chr(pktno & 0xff) + else: + data = source_file.read(pkt_size - 2) + if data == '': + break; + + payload = struct.pack('!H', pktno & 0xffff) + data + send_pkt(payload) + n += len(payload) + sys.stderr.write('.') + if options.discontinuous and pktno % 5 == 4: + time.sleep(1) + pktno += 1 + + send_pkt(eof=True) + + tb.wait() # wait for it to finish + +if __name__ == '__main__': + try: + main() + except KeyboardInterrupt: + pass diff --git a/gr-digital/examples/receive_path.py b/gr-digital/examples/receive_path.py new file mode 100644 index 000000000..9bc5f7b8f --- /dev/null +++ b/gr-digital/examples/receive_path.py @@ -0,0 +1,140 @@ +#!/usr/bin/env python +# +# Copyright 2005,2006,2007 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 +from gnuradio import eng_notation +from gnuradio import digital + +import copy +import sys + +# ///////////////////////////////////////////////////////////////////////////// +# receive path +# ///////////////////////////////////////////////////////////////////////////// + +class receive_path(gr.hier_block2): + def __init__(self, demod_class, rx_callback, options): + gr.hier_block2.__init__(self, "receive_path", + gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature + gr.io_signature(0, 0, 0)) # Output signature + + + options = copy.copy(options) # make a copy so we can destructively modify + + self._verbose = options.verbose + self._bitrate = options.bitrate # desired bit rate + self._samples_per_symbol = options.samples_per_symbol # desired samples/symbol + + self._rx_callback = rx_callback # this callback is fired when there's a packet available + self._demod_class = demod_class # the demodulator_class we're using + + # Get demod_kwargs + demod_kwargs = self._demod_class.extract_kwargs_from_options(options) + + # Design filter to get actual channel we want + sw_decim = 1 + chan_coeffs = gr.firdes.low_pass (1.0, # gain + sw_decim * self._samples_per_symbol, # sampling rate + 1.0, # midpoint of trans. band + 0.5, # width of trans. band + gr.firdes.WIN_HANN) # filter type + self.channel_filter = gr.fft_filter_ccc(sw_decim, chan_coeffs) + + # receiver + self.packet_receiver = \ + digital.demod_pkts(self._demod_class(**demod_kwargs), + access_code=None, + callback=self._rx_callback, + threshold=-1) + + # Carrier Sensing Blocks + alpha = 0.001 + thresh = 30 # in dB, will have to adjust + self.probe = gr.probe_avg_mag_sqrd_c(thresh,alpha) + + # Display some information about the setup + if self._verbose: + self._print_verbage() + + # connect block input to channel filter + self.connect(self, self.channel_filter) + + # connect the channel input filter to the carrier power detector + self.connect(self.channel_filter, self.probe) + + # connect channel filter to the packet receiver + self.connect(self.channel_filter, self.packet_receiver) + + def bitrate(self): + return self._bitrate + + def samples_per_symbol(self): + return self._samples_per_symbol + + def carrier_sensed(self): + """ + Return True if we think carrier is present. + """ + #return self.probe.level() > X + return self.probe.unmuted() + + def carrier_threshold(self): + """ + Return current setting in dB. + """ + return self.probe.threshold() + + def set_carrier_threshold(self, threshold_in_db): + """ + Set carrier threshold. + + @param threshold_in_db: set detection threshold + @type threshold_in_db: float (dB) + """ + self.probe.set_threshold(threshold_in_db) + + + def add_options(normal, expert): + """ + Adds receiver-specific options to the Options Parser + """ + if not normal.has_option("--bitrate"): + normal.add_option("-r", "--bitrate", type="eng_float", default=100e3, + help="specify bitrate [default=%default].") + normal.add_option("-v", "--verbose", action="store_true", default=False) + expert.add_option("-S", "--samples-per-symbol", type="float", default=None, + help="set samples/symbol [default=%default]") + expert.add_option("", "--log", action="store_true", default=False, + help="Log all parts of flow graph to files (CAUTION: lots of data)") + + # Make a static method to call before instantiation + add_options = staticmethod(add_options) + + + def _print_verbage(self): + """ + Prints information about the receive path + """ + print "\nReceive Path:" + print "modulation: %s" % (self._demod_class.__name__) + print "bitrate: %sb/s" % (eng_notation.num_to_str(self._bitrate)) + print "samples/symbol: %.4f" % (self._samples_per_symbol) diff --git a/gr-digital/examples/transmit_path.py b/gr-digital/examples/transmit_path.py new file mode 100644 index 000000000..91869ad9a --- /dev/null +++ b/gr-digital/examples/transmit_path.py @@ -0,0 +1,119 @@ +# +# Copyright 2005-2007,2011 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 +from gnuradio import eng_notation +from gnuradio import digital + +import copy +import sys + +# ///////////////////////////////////////////////////////////////////////////// +# transmit path +# ///////////////////////////////////////////////////////////////////////////// + +class transmit_path(gr.hier_block2): + def __init__(self, modulator_class, options): + ''' + See below for what options should hold + ''' + gr.hier_block2.__init__(self, "transmit_path", + gr.io_signature(0, 0, 0), # Input signature + gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature + + options = copy.copy(options) # make a copy so we can destructively modify + + self._verbose = options.verbose + self._tx_amplitude = options.tx_amplitude # digital amplitude sent to USRP + self._bitrate = options.bitrate # desired bit rate + self._samples_per_symbol = options.samples_per_symbol # desired samples/baud + + self._modulator_class = modulator_class # the modulator_class we are using + + # Get mod_kwargs + mod_kwargs = self._modulator_class.extract_kwargs_from_options(options) + + # transmitter + modulator = self._modulator_class(**mod_kwargs) + self.packet_transmitter = \ + digital.mod_pkts(modulator, + access_code=None, + msgq_limit=4, + pad_for_usrp=True) + + self.amp = gr.multiply_const_cc(1) + self.set_tx_amplitude(self._tx_amplitude) + + # Display some information about the setup + if self._verbose: + self._print_verbage() + + # Connect components in the flowgraph + self.connect(self.packet_transmitter, self.amp, self) + + def set_tx_amplitude(self, ampl): + """ + Sets the transmit amplitude sent to the USRP in volts + @param: ampl 0 <= ampl < 1. + """ + self._tx_amplitude = max(0.0, min(ampl, 1)) + self.amp.set_k(self._tx_amplitude) + + def send_pkt(self, payload='', eof=False): + """ + Calls the transmitter method to send a packet + """ + return self.packet_transmitter.send_pkt(payload, eof) + + def bitrate(self): + return self._bitrate + + def samples_per_symbol(self): + return self._samples_per_symbol + + def add_options(normal, expert): + """ + Adds transmitter-specific options to the Options Parser + """ + if not normal.has_option('--bitrate'): + normal.add_option("-r", "--bitrate", type="eng_float", default=100e3, + help="specify bitrate [default=%default].") + normal.add_option("", "--tx-amplitude", type="eng_float", default=0.250, metavar="AMPL", + help="set transmitter digital amplitude: 0 <= AMPL < 1 [default=%default]") + normal.add_option("-v", "--verbose", action="store_true", default=False) + + expert.add_option("-S", "--samples-per-symbol", type="float", default=None, + help="set samples/symbol [default=%default]") + expert.add_option("", "--log", action="store_true", default=False, + help="Log all parts of flow graph to file (CAUTION: lots of data)") + + # Make a static method to call before instantiation + add_options = staticmethod(add_options) + + def _print_verbage(self): + """ + Prints information about the transmit path + """ + print "Tx amplitude %s" % (self._tx_amplitude) + print "modulation: %s" % (self._modulator_class.__name__) + print "bitrate: %sb/s" % (eng_notation.num_to_str(self._bitrate)) + print "samples/symbol: %.4f" % (self._samples_per_symbol) + |