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#!/usr/bin/env python
#
# Copyright 2008 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, gr_unittest
class test_scrambler(gr_unittest.TestCase):
def setUp (self):
self.tb = gr.top_block()
def tearDown(self):
self.tb = None
def test_scrambler_descrambler(self):
src_data = (1,)*1000
src = gr.vector_source_b(src_data, False)
scrambler = gr.scrambler_bb(0x8a, 0x7F, 7) # CCSDS 7-bit scrambler
descrambler = gr.descrambler_bb(0x8a, 0x7F, 7)
dst = gr.vector_sink_b()
self.tb.connect(src, scrambler, descrambler, dst)
self.tb.run()
self.assertEqual(tuple(src_data[:-8]), dst.data()[8:]) # skip garbage during synchronization
if __name__ == '__main__':
gr_unittest.main ()
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