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#!/usr/bin/env python
#
# Copyright 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 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
from gnuradio.sounder import sounder
from gnuradio import eng_notation
from gnuradio.eng_option import eng_option
from optparse import OptionParser
import sys
n2s = eng_notation.num_to_str
def main():
parser = OptionParser(option_class=eng_option)
parser.add_option("-R", "--rx-subdev-spec", type="subdev", default=(0, 0),
help="select USRP Rx side A or B")
parser.add_option("-f", "--frequency", type="eng_float", default=0.0,
help="set frequency to FREQ in Hz, default is %default", metavar="FREQ")
parser.add_option("-d", "--degree", type="int", default=12,
help="set sounding sequence degree (2-12), default is %default,")
parser.add_option("-t", "--transmit", action="store_true", default=False,
help="enable sounding transmitter")
parser.add_option("-r", "--receive", action="store_true", default=False,
help="enable sounding receiver")
parser.add_option("-l", "--loopback", action="store_true", default=False,
help="enable digital loopback, default is disabled")
parser.add_option("-v", "--verbose", action="store_true", default=False,
help="enable verbose output, default is disabled")
parser.add_option("-D", "--debug", action="store_true", default=False,
help="enable debugging output, default is disabled")
parser.add_option("-F", "--filename", default=None,
help="log received impulse responses to file")
(options, args) = parser.parse_args()
if len(args) != 0 or not (options.transmit | options.receive):
parser.print_help()
sys.exit(1)
if options.receive and (options.filename == None):
print "Must supply filename when receiving."
sys.exit(1)
if options.degree > 12 or options.degree < 2:
print "PN code degree must be between 2 and 12"
sys.exit(1)
length = int(2**options.degree-1)
if options.verbose:
print "Using PN code degree of", options.degree, "length", length
if options.loopback == False:
print "Sounding frequency range is", n2s(options.frequency-16e6), "to", n2s(options.frequency+16e6)
if options.filename != None:
print "Logging impulse records to file: ", options.filename
msgq = gr.msg_queue()
s = sounder(transmit=options.transmit,receive=options.receive,loopback=options.loopback,
rx_subdev_spec=options.rx_subdev_spec,frequency=options.frequency,degree=options.degree,
length=length,msgq=msgq,verbose=options.verbose,debug=options.debug)
s.start()
if options.receive:
f = open(options.filename, "wb")
print "Enter CTRL-C to stop."
try:
while (1):
msg = msgq.delete_head()
if msg.type() == 1:
break
rec = msg.to_string()[:length*gr.sizeof_gr_complex]
if options.debug:
print "Received impulse vector of length", len(rec)
f.write(rec)
except KeyboardInterrupt:
pass
else:
if options.transmit:
raw_input("Press return to exit.")
if __name__ == "__main__":
main()
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