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#!/usr/bin/python
#
# Copyright 2002 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.
#
def output(input, state):
x2 = (input >> 1) & 0x1
x1 = (input >> 0) & 0x1
s = (state >> 2) & 0x1
t = (state >> 1) & 0x1
u = (state >> 0) & 0x1
z0 = u
z1 = x1
z2 = x2 ^ s
return (z2 << 2) | (z1 << 1) | z0
def next_state(input, state):
x2 = (input >> 1) & 0x1
x1 = (input >> 0) & 0x1
s0 = (state >> 2) & 0x1
t0 = (state >> 1) & 0x1
u0 = (state >> 0) & 0x1
s1 = x2 ^ s0
t1 = u0
u1 = t0 ^ x1
return (s1 << 2) | (t1 << 1) | u1
print "@@@ NEXT @@@"
for i in range (32):
state = (i >> 2) & 0x7
input = i & 0x3
print next_state (input, state)
print "@@@ OUTPUT @@@"
for i in range (32):
state = (i >> 2) & 0x7
input = i & 0x3
print output (input, state)
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