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#!/usr/bin/env python
#
# Copyright 2013 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.
#
import time
from gnuradio import gr, gr_unittest, blocks
class test_sample_and_hold(gr_unittest.TestCase):
def setUp(self):
self.tb = gr.top_block()
def tearDown(self):
self.tb = None
def test_001(self):
src_data = 10*[0,1,2,3,4,5,6,7,8,9,8,7,6,5,4,3,2,1]
ctrl_data = 10*[1,0,0,0,1,1,1,1,1,1,0,0,0,0,0,0,0,0]
expected_result = 10*(0,0,0,0,4,5,6,7,8,9,9,9,9,9,9,9,9,9)
src = blocks.vector_source_f(src_data)
ctrl = blocks.vector_source_b(ctrl_data)
op = blocks.sample_and_hold_ff()
dst = blocks.vector_sink_f()
self.tb.connect(src, (op,0))
self.tb.connect(ctrl, (op,1))
self.tb.connect(op, dst)
self.tb.run()
result = dst.data()
self.assertFloatTuplesAlmostEqual(expected_result, result, places=6)
if __name__ == '__main__':
gr_unittest.run(test_sample_and_hold, "test_sample_and_hold.xml")
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