1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
|
#!/usr/bin/env python
#
# Copyright 2010,2011 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
from gnuradio import eng_notation
from gnuradio.eng_option import eng_option
from optparse import OptionParser
# From gr-digital
from gnuradio import digital
# from current dir
from receive_path import receive_path
from uhd_interface import uhd_receiver
import random
import struct
import sys
#import os
#print os.getpid()
#raw_input('Attach and press enter: ')
class my_top_block(gr.top_block):
def __init__(self, demodulator, rx_callback, options):
gr.top_block.__init__(self)
if(options.tx_freq is not None):
self.source = uhd_receiver(options.address, options.bitrate,
options.samples_per_symbol,
options.rx_freq, options.rx_gain,
options.antenna, options.verbose)
options.samples_per_symbol = self.source._sps
elif(options.from_file is not None):
self.source = gr.file_source(gr.sizeof_gr_complex, options.from_file)
else:
self.source = gr.null_source(gr.sizeof_gr_complex)
# Set up receive path
# do this after for any adjustments to the options that may
# occur in the sinks (specifically the UHD sink)
self.rxpath = receive_path(demodulator, rx_callback, options)
self.connect(self.source, self.rxpath)
# /////////////////////////////////////////////////////////////////////////////
# main
# /////////////////////////////////////////////////////////////////////////////
global n_rcvd, n_right
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)
demods = digital.modulation_utils2.type_1_demods()
# Create Options Parser:
parser = OptionParser (option_class=eng_option, conflict_handler="resolve")
expert_grp = parser.add_option_group("Expert")
parser.add_option("-m", "--modulation", type="choice", choices=demods.keys(),
default='psk',
help="Select modulation from: %s [default=%%default]"
% (', '.join(demods.keys()),))
parser.add_option("","--from-file", default=None,
help="input file of samples to demod")
receive_path.add_options(parser, expert_grp)
uhd_receiver.add_options(parser)
for mod in demods.values():
mod.add_options(expert_grp)
(options, args) = parser.parse_args ()
if len(args) != 0:
parser.print_help(sys.stderr)
sys.exit(1)
if options.from_file is None:
if options.rx_freq is None:
sys.stderr.write("You must specify -f FREQ or --freq FREQ\n")
parser.print_help(sys.stderr)
sys.exit(1)
# build the graph
tb = my_top_block(demods[options.modulation], rx_callback, options)
r = gr.enable_realtime_scheduling()
if r != gr.RT_OK:
print "Warning: Failed to enable realtime scheduling."
tb.start() # start flow graph
tb.wait() # wait for it to finish
if __name__ == '__main__':
try:
main()
except KeyboardInterrupt:
pass
|
