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[Commit-gnuradio] r4215 - gnuradio/branches/developers/trondeau/digital-
From: |
trondeau |
Subject: |
[Commit-gnuradio] r4215 - gnuradio/branches/developers/trondeau/digital-wip2/gnuradio-examples/python/digital |
Date: |
Tue, 2 Jan 2007 07:43:35 -0700 (MST) |
Author: trondeau
Date: 2007-01-02 07:43:35 -0700 (Tue, 02 Jan 2007)
New Revision: 4215
Added:
gnuradio/branches/developers/trondeau/digital-wip2/gnuradio-examples/python/digital/benchmark_loopback.py
gnuradio/branches/developers/trondeau/digital-wip2/gnuradio-examples/python/digital/receive_path_lb.py
gnuradio/branches/developers/trondeau/digital-wip2/gnuradio-examples/python/digital/transmit_path_lb.py
Log:
adding support for loopback digital testing with original hier_blocks
Added:
gnuradio/branches/developers/trondeau/digital-wip2/gnuradio-examples/python/digital/benchmark_loopback.py
===================================================================
---
gnuradio/branches/developers/trondeau/digital-wip2/gnuradio-examples/python/digital/benchmark_loopback.py
(rev 0)
+++
gnuradio/branches/developers/trondeau/digital-wip2/gnuradio-examples/python/digital/benchmark_loopback.py
2007-01-02 14:43:35 UTC (rev 4215)
@@ -0,0 +1,185 @@
+#!/usr/bin/env python
+#!/usr/bin/env python
+#
+# Copyright 2005, 2006 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., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+#
+
+from gnuradio import gr, gru, modulation_utils
+from gnuradio import eng_notation
+from gnuradio.eng_option import eng_option
+from optparse import OptionParser
+
+import random, time, struct, sys, math
+
+# from current dir
+from transmit_path_lb import transmit_path
+from receive_path_lb import receive_path
+import fusb_options
+
+class awgn_channel(gr.hier_block):
+ def __init__(self, fg, sample_rate, noise_voltage, frequency_offset,
seed=False):
+ self.input = gr.add_const_cc(0) # dummy input device
+
+ # Create the Gaussian noise source
+ if not seed:
+ self.noise = gr.noise_source_c(gr.GR_GAUSSIAN, noise_voltage)
+ else:
+ rseed = int(time.time())
+ self.noise = gr.noise_source_c(gr.GR_GAUSSIAN, noise_voltage,
rseed)
+
+ self.adder = gr.add_cc()
+
+ # Create the frequency offset
+ self.offset = gr.sig_source_c((sample_rate*1.0), gr.GR_SIN_WAVE,
+ frequency_offset, 1.0, 0.0)
+ self.mixer = gr.multiply_cc()
+
+ # Connect the components
+ fg.connect(self.input, (self.mixer, 0))
+ fg.connect(self.offset, (self.mixer, 1))
+ fg.connect(self.mixer, (self.adder, 0))
+ fg.connect(self.noise, (self.adder, 1))
+
+ gr.hier_block.__init__(self, fg, self.input, self.adder)
+
+class my_graph(gr.flow_graph):
+ def __init__(self, mod_class, demod_class, rx_callback, options):
+ gr.flow_graph.__init__(self)
+
+ channelon = True;
+
+ SNR = 10.0**(options.snr/10.0)
+ frequency_offset = options.frequency_offset
+
+ power_in_signal = abs(options.tx_amplitude)**2
+ noise_power = power_in_signal/SNR
+ noise_voltage = math.sqrt(noise_power)
+
+ self.txpath = transmit_path(self, mod_class, options)
+ self.throttle = gr.throttle(gr.sizeof_gr_complex, options.sample_rate)
+ self.rxpath = receive_path(self, demod_class, rx_callback, options)
+
+ if channelon:
+ self.channel = awgn_channel(self, options.sample_rate,
noise_voltage, frequency_offset, options.seed)
+
+ # Connect components
+ self.connect(self.txpath, self.throttle, self.channel, self.rxpath)
+ else:
+ # Connect components
+ self.connect(self.txpath, self.throttle, self.rxpath)
+
+
+# /////////////////////////////////////////////////////////////////////////////
+# main
+# /////////////////////////////////////////////////////////////////////////////
+
+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)
+
+ def send_pkt(payload='', eof=False):
+ return fg.txpath.send_pkt(payload, eof)
+
+
+ mods = modulation_utils.type_1_mods()
+ demods = modulation_utils.type_1_demods()
+
+ parser = OptionParser(option_class=eng_option, conflict_handler="resolve")
+ expert_grp = parser.add_option_group("Expert")
+ channel_grp = parser.add_option_group("Channel")
+
+ parser.add_option("-m", "--modulation", type="choice", choices=mods.keys(),
+ default='dbpsk',
+ 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)")
+
+ channel_grp.add_option("", "--sample-rate", type="eng_float", default=1e5,
+ help="set speed of channel/simulation rate to RATE
[default=%default]")
+ channel_grp.add_option("", "--snr", type="eng_float", default=30,
+ help="set the SNR of the channel in dB
[default=%default]")
+ channel_grp.add_option("", "--frequency-offset", type="eng_float",
default=0,
+ help="set frequency offset introduced by channel
[default=%default]")
+ channel_grp.add_option("", "--seed", action="store_true", default=False,
+ help="use a random seed for AWGN noise
[default=%default]")
+
+ transmit_path.add_options(parser, expert_grp)
+ receive_path.add_options(parser, expert_grp)
+
+ for mod in mods.values():
+ mod.add_options(expert_grp)
+ for demod in demods.values():
+ demod.add_options(expert_grp)
+
+ (options, args) = parser.parse_args ()
+
+ if len(args) != 0:
+ parser.print_help()
+ sys.exit(1)
+
+ r = gr.enable_realtime_scheduling()
+ if r != gr.RT_OK:
+ print "Warning: failed to enable realtime scheduling"
+
+ # Create an instance of a hierarchical block
+ fg = my_graph(mods[options.modulation], demods[options.modulation],
rx_callback, options)
+ fg.start()
+
+ # generate and send packets
+ nbytes = int(1e6 * options.megabytes)
+ n = 0
+ pktno = 0
+ pkt_size = int(options.size)
+
+ while n < nbytes:
+ send_pkt(struct.pack('!H', pktno) + (pkt_size - 2) * chr(pktno & 0xff))
+ n += pkt_size
+ if options.discontinuous and pktno % 5 == 4:
+ time.sleep(1)
+ pktno += 1
+
+ send_pkt(eof=True)
+
+ fg.wait()
+
+if __name__ == '__main__':
+ try:
+ main()
+ except KeyboardInterrupt:
+ pass
Property changes on:
gnuradio/branches/developers/trondeau/digital-wip2/gnuradio-examples/python/digital/benchmark_loopback.py
___________________________________________________________________
Name: svn:executable
+ *
Added:
gnuradio/branches/developers/trondeau/digital-wip2/gnuradio-examples/python/digital/receive_path_lb.py
===================================================================
---
gnuradio/branches/developers/trondeau/digital-wip2/gnuradio-examples/python/digital/receive_path_lb.py
(rev 0)
+++
gnuradio/branches/developers/trondeau/digital-wip2/gnuradio-examples/python/digital/receive_path_lb.py
2007-01-02 14:43:35 UTC (rev 4215)
@@ -0,0 +1,135 @@
+#!/usr/bin/env python
+#
+# Copyright 2005,2006 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., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+#
+
+from gnuradio import gr, gru, blks
+from gnuradio import eng_notation
+import copy
+import sys
+
+# /////////////////////////////////////////////////////////////////////////////
+# receive path
+# /////////////////////////////////////////////////////////////////////////////
+
+class receive_path(gr.hier_block):
+ def __init__(self, fg, demod_class, rx_callback, options):
+
+ 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
+ 0.1, # 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 = \
+ blks.demod_pkts(fg,
+ self._demod_class(fg, **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 the channel input filter to the carrier power detector
+ fg.connect(self.channel_filter, self.probe)
+
+ # connect channel filter to the packet receiver
+ fg.connect(self.channel_filter, self.packet_receiver)
+
+ gr.hier_block.__init__(self, fg, self.channel_filter, None)
+
+ 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("", "--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)
+ expert.add_option("-S", "--samples-per-symbol", type="int", default=2,
+ 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 "modulation: %s" % (self._demod_class.__name__)
+ print "bitrate: %sb/s" %
(eng_notation.num_to_str(self._bitrate))
+ print "samples/symbol: %3d" % (self._samples_per_symbol)
Added:
gnuradio/branches/developers/trondeau/digital-wip2/gnuradio-examples/python/digital/transmit_path_lb.py
===================================================================
---
gnuradio/branches/developers/trondeau/digital-wip2/gnuradio-examples/python/digital/transmit_path_lb.py
(rev 0)
+++
gnuradio/branches/developers/trondeau/digital-wip2/gnuradio-examples/python/digital/transmit_path_lb.py
2007-01-02 14:43:35 UTC (rev 4215)
@@ -0,0 +1,117 @@
+#
+# Copyright 2005,2006 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., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+#
+
+from gnuradio import gr, gru, blks
+from gnuradio import eng_notation
+
+import copy
+import sys
+
+# /////////////////////////////////////////////////////////////////////////////
+# transmit path
+# /////////////////////////////////////////////////////////////////////////////
+
+class transmit_path(gr.hier_block):
+ def __init__(self, fg, modulator_class, options):
+ '''
+ See below for what options should hold
+ '''
+
+ 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
+ self.packet_transmitter = \
+ blks.mod_pkts(fg,
+ self._modulator_class(fg, **mod_kwargs),
+ 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
+ fg.connect(self.packet_transmitter, self.amp)
+
+ gr.hier_block.__init__(self, fg, None, self.amp)
+
+ def set_tx_amplitude(self, ampl):
+ """
+ Sets the transmit amplitude sent to the USRP
+ @param: ampl 0 <= ampl < 32768. Try 8000
+ """
+ self._tx_amplitude = max(0.0, min(ampl, 32767.0))
+ 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=12000, metavar="AMPL",
+ help="set transmitter digital amplitude: 0 <= AMPL <
32768 [default=%default]")
+ normal.add_option("-v", "--verbose", action="store_true",
default=False)
+
+ expert.add_option("-S", "--samples-per-symbol", type="int", default=2,
+ 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: %3d" % (self._samples_per_symbol)
+
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