3 files changed, 104 insertions, 5 deletions
diff --git a/gr-digital/python/Makefile.am b/gr-digital/python/Makefile.am
index a6d9f779d1..09be67f3a5 100644
--- a/gr-digital/python/Makefile.am
+++ b/gr-digital/python/Makefile.am
@@ -40,18 +40,20 @@ noinst_PYTHON = \
 	qa_constellation_decoder_cb.py	\
 	qa_correlate_access_code.py	\
 	qa_costas_loop_cc.py		\
+	qa_crc32.py			\
 	qa_lms_equalizer.py
 
 digital_PYTHON = \
 	__init__.py	\
-	psk.py		\
+	crc.py		\
+	bpsk.py		\
 	dbpsk.py	\
 	dqpsk.py	\
 	d8psk.py	\
-	psk2.py		\
 	generic_mod_demod.py	\
+	gmsk.py		\
+	psk.py		\
+	psk2.py		\
 	qam.py		\
-	bpsk.py		\
-	qpsk.py		\
-	gmsk.py
+	qpsk.py
 endif
diff --git a/gr-digital/python/crc.py b/gr-digital/python/crc.py
new file mode 100644
index 0000000000..f9d369f4cb
--- /dev/null
+++ b/gr-digital/python/crc.py
@@ -0,0 +1,37 @@
+#
+# Copyright 2005,2007,2011 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
+import struct
+
+def gen_and_append_crc32(s):
+    crc = gr.crc32(s)
+    return s + struct.pack(">I", gru.hexint(crc) & 0xFFFFFFFF)
+
+def check_crc32(s):
+    if len(s) < 4:
+        return (False, '')
+    msg = s[:-4]
+    #print "msg = '%s'" % (msg,)
+    actual = gr.crc32(msg)
+    (expected,) = struct.unpack(">I", s[-4:])
+    # print "actual =", hex(actual), "expected =", hex(expected)
+    return (actual == expected, msg)
diff --git a/gr-digital/python/qa_crc32.py b/gr-digital/python/qa_crc32.py
new file mode 100644
index 0000000000..f86813f3f3
--- /dev/null
+++ b/gr-digital/python/qa_crc32.py
@@ -0,0 +1,60 @@
+#!/usr/bin/env python
+#
+# Copyright 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, gr_unittest
+import digital_swig
+import random, cmath
+
+class test_crc32(gr_unittest.TestCase):
+
+    def setUp (self):
+        self.tb = gr.top_block ()
+
+    def tearDown (self):
+        self.tb = None
+
+    def test01 (self):
+        data = 100*"0"
+        expected_result = 2943744955
+        result = digital_swig.crc32(data)
+        #print hex(result)
+        
+        self.assertEqual (expected_result, result)
+
+    def test02 (self):
+        data = 100*"1"
+        expected_result = 2326594156
+        result = digital_swig.crc32(data)
+        #print hex(result)
+        
+        self.assertEqual (expected_result, result)
+
+    def test03 (self):
+        data = 10*"0123456789"
+        expected_result = 3774345973
+        result = digital_swig.crc32(data)
+        #print hex(result)
+
+        self.assertEqual (expected_result, result)
+
+if __name__ == '__main__':
+    gr_unittest.run(test_crc32, "test_crc32.xml")