3 # Copyright 2005,2006 Free Software Foundation, Inc.
5 # This file is part of GNU Radio
7 # GNU Radio is free software; you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation; either version 3, or (at your option)
12 # GNU Radio is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with GNU Radio; see the file COPYING. If not, write to
19 # the Free Software Foundation, Inc., 51 Franklin Street,
20 # Boston, MA 02110-1301, USA.
23 from gnuradio import gr, gru, modulation_utils
24 from gnuradio import usrp
25 from gnuradio import audio
26 from gnuradio import eng_notation
27 from gnuradio.eng_option import eng_option
28 from optparse import OptionParser
30 from gnuradio.vocoder import gsm_full_rate
37 from receive_path import receive_path
42 #raw_input('Attach and press enter')
45 class audio_tx(gr.hier_block2):
46 def __init__(self, audio_output_dev):
47 gr.hier_block2.__init__(self, "audio_tx",
48 gr.io_signature(0, 0, 0), # Input signature
49 gr.io_signature(0, 0, 0)) # Output signature
51 self.packet_src = gr.message_source(33)
52 voice_decoder = gsm_full_rate.decode_ps()
53 s2f = gr.short_to_float ()
54 sink_scale = gr.multiply_const_ff(1.0/32767.)
55 audio_sink = audio.sink(8000, audio_output_dev)
56 self.connect(self.packet_src, voice_decoder, s2f, sink_scale, audio_sink)
59 return self.packet_src.msgq()
62 class my_top_block(gr.top_block):
63 def __init__(self, demod_class, rx_callback, options):
64 gr.top_block.__init__(self)
65 self.rxpath = receive_path(demod_class, rx_callback, options)
66 self.audio_tx = audio_tx(options.audio_output)
67 self.connect(self.rxpath)
68 self.connect(self.audio_tx)
70 # /////////////////////////////////////////////////////////////////////////////
72 # /////////////////////////////////////////////////////////////////////////////
74 global n_rcvd, n_right
77 global n_rcvd, n_right
82 def rx_callback(ok, payload):
83 global n_rcvd, n_right
88 fg.audio_tx.msgq().insert_tail(gr.message_from_string(payload))
90 print "ok = %r n_rcvd = %4d n_right = %4d" % (
93 demods = modulation_utils.type_1_demods()
95 # Create Options Parser:
96 parser = OptionParser (option_class=eng_option, conflict_handler="resolve")
97 expert_grp = parser.add_option_group("Expert")
99 parser.add_option("-m", "--modulation", type="choice", choices=demods.keys(),
101 help="Select modulation from: %s [default=%%default]"
102 % (', '.join(demods.keys()),))
103 parser.add_option("-O", "--audio-output", type="string", default="",
104 help="pcm output device name. E.g., hw:0,0 or /dev/dsp")
106 receive_path.add_options(parser, expert_grp)
108 for mod in demods.values():
109 mod.add_options(expert_grp)
111 fusb_options.add_options(expert_grp)
113 parser.set_defaults(bitrate=50e3) # override default bitrate default
114 (options, args) = parser.parse_args ()
117 parser.print_help(sys.stderr)
120 if options.rx_freq is None:
121 sys.stderr.write("You must specify -f FREQ or --freq FREQ\n")
122 parser.print_help(sys.stderr)
127 tb = my_top_block(demods[options.modulation], rx_callback, options)
129 r = gr.enable_realtime_scheduling()
131 print "Warning: Failed to enable realtime scheduling."
135 if __name__ == '__main__':
138 except KeyboardInterrupt: