generic_usrp.py \
pick_bitrate.py \
receive_path.py \
- receive_path_lb.py \
transmit_path.py \
- transmit_path_lb.py \
usrp_options.py
dist_ourdata_SCRIPTS = \
import random, time, struct, sys, math
# from current dir
-from transmit_path_lb import transmit_path
-from receive_path_lb import receive_path
+from transmit_path import transmit_path
+from receive_path import receive_path
class my_top_block(gr.top_block):
def __init__(self, mod_class, demod_class, rx_callback, options):
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)
+
+ 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()
+ 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)
+ g = self.subdev.gain_range()
+ if options.show_rx_gain_range:
+ print "Rx Gain Range: minimum = %g, maximum = %g, step size = %g" \
+ % (g[0], g[1], g[2])
+ self.set_gain(options.rx_gain)
+ self.set_auto_tr(True) # enable Auto Transmit/Receive switching
+
+ # Set up receive path
self.rxpath = receive_path(demodulator, rx_callback, options)
- self.connect(self.rxpath)
+
+ self.connect(self.u, self.rxpath)
+
+ def _setup_usrp_source(self):
+ self.u = usrp.source_c ()
+ adc_rate = self.u.adc_rate()
+
+ self.u.set_decim_rate(self._decim)
+
+ # determine the daughterboard subdevice we're using
+ if self._rx_subdev_spec is None:
+ self._rx_subdev_spec = usrp.pick_rx_subdevice(self.u)
+ self.subdev = usrp.selected_subdev(self.u, self._rx_subdev_spec)
+
+ self.u.set_mux(usrp.determine_rx_mux_value(self.u, self._rx_subdev_spec))
+
+ 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.
+ """
+ r = self.u.tune(0, self.subdev, target_freq)
+ if r:
+ return True
+
+ return False
+
+ def set_gain(self, gain):
+ """
+ Sets the analog gain in the USRP
+ """
+ if gain is None:
+ r = self.subdev.gain_range()
+ gain = (r[0] + r[1])/2 # set gain to midpoint
+ self.gain = gain
+ return self.subdev.set_gain(gain)
+
+ def set_auto_tr(self, enable):
+ return self.subdev.set_auto_tr(enable)
+
+ def decim(self):
+ return self._decim
+
+ 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)
+
+ 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
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)
for mod in demods.values():
class my_top_block(gr.top_block):
def __init__(self, modulator, options):
gr.top_block.__init__(self)
+
+ self._tx_freq = options.tx_freq # tranmitter's center frequency
+ self._tx_subdev_spec = options.tx_subdev_spec # daughterboard to use
+ self._interp = options.interp # interpolating rate for the USRP (prelim)
+
+ if self._tx_freq is None:
+ sys.stderr.write("-f FREQ or --freq FREQ or --tx-freq FREQ must be specified\n")
+ raise SystemExit
+
+ # Set up USRP sink; also adjusts interp, and bitrate
+ self._setup_usrp_sink()
+
+ # copy the final answers back into options for use by modulator
+ #options.bitrate = self._bitrate
+
self.txpath = transmit_path(modulator, options)
- self.connect(self.txpath)
+
+ self.connect(self.txpath, self.u)
+
+ def _setup_usrp_sink(self):
+ """
+ Creates a USRP sink, determines the settings for best bitrate,
+ and attaches to the transmitter's subdevice.
+ """
+ self.u = usrp.sink_c()
+
+ self.u.set_interp_rate(self._interp)
+
+ # determine the daughterboard subdevice we're using
+ if self._tx_subdev_spec is None:
+ self._tx_subdev_spec = usrp.pick_tx_subdevice(self.u)
+ self.u.set_mux(usrp.determine_tx_mux_value(self.u, self._tx_subdev_spec))
+ self.subdev = usrp.selected_subdev(self.u, self._tx_subdev_spec)
+
+ # Set center frequency of USRP
+ ok = self.set_freq(self._tx_freq)
+ if not ok:
+ print "Failed to set Tx frequency to %s" % (eng_notation.num_to_str(self._tx_freq),)
+ raise ValueError
+
+ # Set the USRP for maximum transmit gain
+ # (Note that on the RFX cards this is a nop.)
+ self.set_gain(self.subdev.gain_range()[1])
+
+ # enable Auto Transmit/Receive switching
+ self.set_auto_tr(True)
+
+ 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.
+ """
+ r = self.u.tune(self.subdev.which(), self.subdev, target_freq)
+ if r:
+ return True
+
+ return False
+
+ def set_gain(self, gain):
+ """
+ Sets the analog gain in the USRP
+ """
+ self.gain = gain
+ self.subdev.set_gain(gain)
+
+ def set_auto_tr(self, enable):
+ """
+ Turns on auto transmit/receive of USRP daughterboard (if exits; else ignored)
+ """
+ return self.subdev.set_auto_tr(enable)
+
+ def interp(self):
+ return self._interp
+
+ def add_options(normal, expert):
+ """
+ Adds usrp-specific options to the Options Parser
+ """
+ add_freq_option(normal)
+ normal.add_option("-T", "--tx-subdev-spec", type="subdev", default=None,
+ help="select USRP Tx side A or B")
+ normal.add_option("-v", "--verbose", action="store_true", default=False)
+
+ expert.add_option("", "--tx-freq", type="eng_float", default=None,
+ help="set transmit frequency to FREQ [default=%default]", metavar="FREQ")
+ expert.add_option("-i", "--interp", type="intx", default=256,
+ help="set fpga interpolation rate to INTERP [default=%default]")
+ # Make a static method to call before instantiation
+ add_options = staticmethod(add_options)
+
+ def _print_verbage(self):
+ """
+ Prints information about the transmit path
+ """
+ print "Using TX d'board %s" % (self.subdev.side_and_name(),)
+ print "modulation: %s" % (self._modulator_class.__name__)
+ print "interp: %3d" % (self._interp)
+ print "Tx Frequency: %s" % (eng_notation.num_to_str(self._tx_freq))
+
+
+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
parser.add_option("","--from-file", default=None,
help="use file for packet contents")
+ my_top_block.add_options(parser, expert_grp)
transmit_path.add_options(parser, expert_grp)
for mod in mods.values():
#!/usr/bin/env python
#
-# Copyright 2005,2006,2007,2009 Free Software Foundation, Inc.
+# Copyright 2005,2006,2007 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
#
from gnuradio import gr, gru, blks2
-from gnuradio import usrp
from gnuradio import eng_notation
import copy
import sys
-# from current dir
-from pick_bitrate import pick_rx_bitrate
-import usrp_options
-
# /////////////////////////////////////////////////////////////////////////////
# 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(0, 0, 0), # Input signature
- gr.io_signature(0, 0, 0)) # Output signature
+ 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._rx_freq = options.rx_freq # receiver's center frequency
self._bitrate = options.bitrate # desired bit rate
- self._decim = options.decim # Decimating rate for the USRP (prelim)
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
- 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; also adjusts decim, samples_per_symbol, and bitrate
- self._setup_usrp_source(options)
-
- # Set RF frequency
- 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)
-
- # 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
-
# Get demod_kwargs
demod_kwargs = self._demod_class.extract_kwargs_from_options(options)
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
-
- # Decimating channel filter
- # complex in and out, float taps
- self.chan_filt = gr.fft_filter_ccc(sw_decim, chan_coeffs)
- #self.chan_filt = gr.fir_filter_ccf(sw_decim, chan_coeffs)
-
+ gr.firdes.WIN_HANN) # filter type
+ self.channel_filter = gr.fft_filter_ccc(sw_decim, chan_coeffs)
+
# receiver
self.packet_receiver = \
blks2.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
-
- if options.log_rx_power == True:
- self.probe = gr.probe_avg_mag_sqrd_cf(thresh,alpha)
- self.power_sink = gr.file_sink(gr.sizeof_float, "rxpower.dat")
- self.connect(self.chan_filt, self.probe, self.power_sink)
- else:
- self.probe = gr.probe_avg_mag_sqrd_c(thresh,alpha)
- self.connect(self.chan_filt, self.probe)
+ self.probe = gr.probe_avg_mag_sqrd_c(thresh,alpha)
# Display some information about the setup
if self._verbose:
self._print_verbage()
-
- self.connect(self.u, self.chan_filt, self.packet_receiver)
-
- def _setup_usrp_source(self, options):
-
- self.u = usrp_options.create_usrp_source(options)
- adc_rate = self.u.adc_rate()
- # derive values of bitrate, samples_per_symbol, and decim from desired info
- (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())
+ # connect block input to channel filter
+ self.connect(self, self.channel_filter)
- self.u.set_decim(self._decim)
+ # connect the channel input filter to the carrier power detector
+ self.connect(self.channel_filter, self.probe)
- def set_freq(self, target_freq):
- """
- Set the center frequency we're interested in.
-
- @param target_freq: frequency in Hz
- @rypte: bool
+ # connect channel filter to the packet receiver
+ self.connect(self.channel_filter, self.packet_receiver)
- 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 bitrate(self):
return self._bitrate
def samples_per_symbol(self):
return self._samples_per_symbol
- def decim(self):
- return self._decim
-
def carrier_sensed(self):
"""
Return True if we think carrier is present.
"""
self.probe.set_threshold(threshold_in_db)
- @staticmethod
+
def add_options(normal, expert):
"""
Adds receiver-specific options to the Options Parser
"""
- add_freq_option(normal)
if not normal.has_option("--bitrate"):
- normal.add_option("-r", "--bitrate", type="eng_float", default=None,
- help="specify bitrate. samples-per-symbol and interp/decim will be derived.")
- usrp_options.add_rx_options(normal)
+ 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=None,
+ expert.add_option("-S", "--samples-per-symbol", type="int", default=2,
help="set samples/symbol [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("", "--log", action="store_true", default=False,
help="Log all parts of flow graph to files (CAUTION: lots of data)")
- expert.add_option("", "--log-rx-power", action="store_true", default=False,
- help="Log receive signal power 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 receive path
"""
print "\nReceive Path:"
- print "USRP %s" % (self.u,)
- print "Rx gain: %g" % (self.u.gain(),)
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)
- print "decim: %3d" % (self._decim)
- print "Rx Frequency: %s" % (eng_notation.num_to_str(self._rx_freq))
-
-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")
+++ /dev/null
-#!/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, blks2
-from gnuradio import eng_notation
-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 = \
- blks2.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("", "--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 "\nReceive 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)
#
-# Copyright 2005,2006,2007,2009 Free Software Foundation, Inc.
+# Copyright 2005, 2006, 2007 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
#
from gnuradio import gr, gru, blks2
-from gnuradio import usrp
from gnuradio import eng_notation
import copy
import sys
-# from current dir
-from pick_bitrate import pick_tx_bitrate
-import usrp_options
-
# /////////////////////////////////////////////////////////////////////////////
# transmit path
# /////////////////////////////////////////////////////////////////////////////
-class transmit_path(gr.hier_block2):
+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(0, 0, 0)) # Output signature
-
+ 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_freq = options.tx_freq # tranmitter's center frequency
self._tx_amplitude = options.tx_amplitude # digital amplitude sent to USRP
self._bitrate = options.bitrate # desired bit rate
- self._interp = options.interp # interpolating rate for the USRP (prelim)
self._samples_per_symbol = options.samples_per_symbol # desired samples/baud
- self._use_whitener_offset = options.use_whitener_offset # increment start of whitener XOR data
-
- self._modulator_class = modulator_class # the modulator_class we are using
-
- if self._tx_freq is None:
- sys.stderr.write("-f FREQ or --freq FREQ or --tx-freq FREQ must be specified\n")
- raise SystemExit
-
- # Set up USRP sink; also adjusts interp, samples_per_symbol, and bitrate
- self._setup_usrp_sink(options)
- # copy the final answers back into options for use by modulator
- options.samples_per_symbol = self._samples_per_symbol
- options.bitrate = self._bitrate
- options.interp = self._interp
+ self._modulator_class = modulator_class # the modulator_class we are using
# Get mod_kwargs
mod_kwargs = self._modulator_class.extract_kwargs_from_options(options)
-
- # Set center frequency of USRP
- ok = self.set_freq(self._tx_freq)
- if not ok:
- print "Failed to set Tx frequency to %s" % (eng_notation.num_to_str(self._tx_freq),)
- raise ValueError
# transmitter
+ modulator = self._modulator_class(**mod_kwargs)
self.packet_transmitter = \
- blks2.mod_pkts(self._modulator_class(**mod_kwargs),
+ blks2.mod_pkts(modulator,
access_code=None,
msgq_limit=4,
- pad_for_usrp=True,
- use_whitener_offset=options.use_whitener_offset)
-
-
- # Set the USRP for maximum transmit gain
- # (Note that on the RFX cards this is a nop.)
- #self.set_gain(self.u.gain_range()[1])
+ pad_for_usrp=True)
self.amp = gr.multiply_const_cc(1)
self.set_tx_amplitude(self._tx_amplitude)
if self._verbose:
self._print_verbage()
- # Create and setup transmit path flow graph
- self.connect(self.packet_transmitter, self.amp, self.u)
-
- def _setup_usrp_sink(self, options):
- """
- Creates a USRP sink, determines the settings for best bitrate,
- and attaches to the transmitter's subdevice.
- """
- self.u = usrp_options.create_usrp_sink(options)
- dac_rate = self.u.dac_rate();
-
- # derive values of bitrate, samples_per_symbol, and interp from desired info
- (self._bitrate, self._samples_per_symbol, self._interp) = \
- pick_tx_bitrate(self._bitrate, self._modulator_class.bits_per_symbol(),
- self._samples_per_symbol, self._interp, dac_rate, self.u.get_interp_rates())
-
- self.u.set_interp(self._interp)
-
-
- 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)
+ # 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
- @param ampl the amplitude between 0.0 and 1.0
+ @param: ampl 0 <= ampl < 32768. Try 8000
"""
- self._tx_amplitude = max(0.0, min(ampl, 1.0))
+ 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
def samples_per_symbol(self):
return self._samples_per_symbol
- def interp(self):
- return self._interp
-
def add_options(normal, expert):
"""
Adds transmitter-specific options to the Options Parser
"""
- add_freq_option(normal)
if not normal.has_option('--bitrate'):
- normal.add_option("-r", "--bitrate", type="eng_float", default=None,
- help="specify bitrate. samples-per-symbol and interp/decim will be derived.")
- usrp_options.add_tx_options(normal)
- normal.add_option("--tx-amplitude", type="eng_float", default=0.15, metavar="AMPL",
- help="set transmitter digital amplitude (0.0-1.0) [default=%default].")
+ 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=None,
+
+ expert.add_option("-S", "--samples-per-symbol", type="int", default=2,
help="set samples/symbol [default=%default]")
- expert.add_option("", "--tx-freq", type="eng_float", default=None,
- help="set transmit frequency to FREQ [default=%default]", metavar="FREQ")
expert.add_option("", "--log", action="store_true", default=False,
help="Log all parts of flow graph to file (CAUTION: lots of data)")
- expert.add_option("","--use-whitener-offset", action="store_true", default=False,
- help="make sequential packets use different whitening")
# Make a static method to call before instantiation
add_options = staticmethod(add_options)
"""
Prints information about the transmit path
"""
- print "Using TX d'board %s" % (self.u,)
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)
- print "interp: %3d" % (self._interp)
- print "Tx Frequency: %s" % (eng_notation.num_to_str(self._tx_freq))
-
-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")
+++ /dev/null
-#
-# 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, blks2
-from gnuradio import eng_notation
-
-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 = \
- blks2.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
- @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)
-
projects / debian / gnuradio / commitdiff