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#!/usr/bin/env python
#
# Copyright 2005 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 usrp
from gnuradio import audio
from gnuradio import eng_notation
from gnuradio.eng_option import eng_option
from optparse import OptionParser
from gnuradio.vocoder import gsm_full_rate
import random
import time
import struct
import sys
# from current dir
from transmit_path import transmit_path
#import os
#print os.getpid()
#raw_input('Attach and press enter')
class my_graph(gr.flow_graph):
def __init__(self, tx_subdev_spec, bitrate, interp_rate, spb, bt):
gr.flow_graph.__init__(self)
self.txpath = transmit_path(self, tx_subdev_spec, bitrate, interp_rate, spb, bt)
audio_input = ""
sample_rate = 8000
src = audio.source(sample_rate, audio_input)
src_scale = gr.multiply_const_ff(32767)
f2s = gr.float_to_short()
voice_coder = gsm_full_rate.encode_sp()
self.packets_from_encoder = gr.msg_queue()
packet_sink = gr.message_sink(33, self.packets_from_encoder, False)
self.connect(src, src_scale, f2s, voice_coder, packet_sink)
# /////////////////////////////////////////////////////////////////////////////
# main
# /////////////////////////////////////////////////////////////////////////////
def main():
def send_pkt(payload='', eof=False):
return fg.txpath.send_pkt(payload, eof)
def rx_callback(ok, payload):
print "ok = %r, payload = '%s'" % (ok, payload)
parser = OptionParser (option_class=eng_option)
parser.add_option("-T", "--tx-subdev-spec", type="subdev", default=None,
help="select USRP Tx side A or B")
parser.add_option("-f", "--freq", type="eng_float", default=423.1e6,
help="set Tx and Rx frequency to FREQ [default=%default]", metavar="FREQ")
parser.add_option("-r", "--bitrate", type="eng_float", default=100e3,
help="specify bitrate. spb and interp will be derived.")
parser.add_option("-S", "--spb", type="int", default=None, help="set samples/baud [default=%default]")
parser.add_option("-i", "--interp", type="intx", default=None,
help="set fpga interpolation rate to INTERP [default=%default]")
parser.add_option("-s", "--size", type="eng_float", default=1500,
help="set packet size [default=%default]")
parser.add_option("", "--bt", type="float", default=0.3, help="set bandwidth-time product [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)")
(options, args) = parser.parse_args ()
if len(args) != 0:
parser.print_help()
sys.exit(1)
if options.freq < 1e6:
options.freq *= 1e6
pkt_size = int(options.size)
# build the graph
fg = my_graph(options.tx_subdev_spec, options.bitrate, options.interp,
options.spb, options.bt)
print "bitrate: %sb/sec" % (eng_notation.num_to_str(fg.txpath.bitrate()),)
print "spb: %3d" % (fg.txpath.spb(),)
print "interp: %3d" % (fg.txpath.interp(),)
fg.txpath.set_freq(options.freq)
fg.start() # start flow graph
# generate and send packets
nbytes = int(1e6 * options.megabytes)
n = 0
pktno = 0
while n < nbytes:
packet = fg.packets_from_encoder.delete_head()
s = packet.to_string()
send_pkt(s)
n += len(s)
sys.stderr.write('.')
if options.discontinuous and pktno % 5 == 4:
time.sleep(1)
pktno += 1
send_pkt(eof=True)
fg.wait() # wait for it to finish
fg.txpath.set_auto_tr(False)
if __name__ == '__main__':
try:
main()
except KeyboardInterrupt:
pass
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