3 # Copyright 2008 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, gr_unittest
25 class test_scrambler(gr_unittest.TestCase):
28 self.tb = gr.top_block()
33 def test_scrambler_descrambler(self):
35 src = gr.vector_source_b(src_data, False)
36 scrambler = gr.scrambler_bb(0x8a, 0x7F, 7) # CCSDS 7-bit scrambler
37 descrambler = gr.descrambler_bb(0x8a, 0x7F, 7)
38 dst = gr.vector_sink_b()
39 self.tb.connect(src, scrambler, descrambler, dst)
41 self.assertEqual(tuple(src_data[:-8]), dst.data()[8:]) # skip garbage during synchronization
43 def test_additive_scrambler(self):
45 src = gr.vector_source_b(src_data, False)
46 scrambler = gr.additive_scrambler_bb(0x8a, 0x7f, 7)
47 descrambler = gr.additive_scrambler_bb(0x8a, 0x7f, 7)
48 dst = gr.vector_sink_b()
49 self.tb.connect(src, scrambler, descrambler, dst)
51 self.assertEqual(src_data, dst.data())
53 def test_additive_scrambler_reset(self):
55 src = gr.vector_source_b(src_data, False)
56 scrambler = gr.additive_scrambler_bb(0x8a, 0x7f, 7, 100)
57 descrambler = gr.additive_scrambler_bb(0x8a, 0x7f, 7, 100)
58 dst = gr.vector_sink_b()
59 self.tb.connect(src, scrambler, descrambler, dst)
61 self.assertEqual(src_data, dst.data())
63 if __name__ == '__main__':