analog: export lfsr class to Python and adding QA code for it.

1 files changed, 49 insertions, 0 deletions

diff --git a/gr-analog/python/qa_lfsr.py b/gr-analog/python/qa_lfsr.py
new file mode 100755
index 000000000..2a8167a57
--- /dev/null
+++ b/gr-analog/python/qa_lfsr.py
@@ -0,0 +1,49 @@
+#!/usr/bin/env python
+#
+# Copyright 2012 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
+import analog_swig as analog
+import math
+
+
+class test_lfsr(gr_unittest.TestCase):
+
+    def setUp(self):
+        pass
+
+    def tearDown(self):
+        pass
+
+    def test_lfsr_001(self):
+        reglen = 8
+        l = analog.lfsr(1, 1, reglen)
+
+        result_data = []
+        for i in xrange(4*(reglen+1)):
+            result_data.append(l.next_bit())
+
+        expected_result = 4*([1,] + reglen*[0,])
+        self.assertFloatTuplesAlmostEqual(expected_result, result_data, 5)
+
+if __name__ == '__main__':
+    gr_unittest.run(test_lfsr, "test_lfsr.xml")
+