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Added DCS parity table and generator tool

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furrtek 2017-03-14 07:24:04 +00:00
parent b77b8b0f42
commit 37cfcd392d
17 changed files with 1107 additions and 24 deletions
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firmware/tools/make_dcs.py Normal file
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#!/usr/bin/env python
# Copyright (C) 2016 Furrtek
#
# This program 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 2, or (at your option)
# any later version.
#
# This program 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 this program; see the file COPYING. If not, write to
# the Free Software Foundation, Inc., 51 Franklin Street,
# Boston, MA 02110-1301, USA.
#
# From http://mmi-comm.tripod.com/dcs.html
import sys
import struct
cb = [0,0,0,0,0,0,0,0,0]
for c in range (0, 0x200): # DCS code is 9 bits
for bit in range(0, 9):
cb[bit] = (c >> bit) & 1
p1 = cb[0] ^ cb[1] ^ cb[2] ^ cb[3] ^ cb[4] ^ cb[7];
p2 = cb[1] ^ cb[2] ^ cb[3] ^ cb[4] ^ cb[5] ^ cb[8] ^ 1;
p3 = cb[0] ^ cb[1] ^ cb[5] ^ cb[6] ^ cb[7];
p4 = cb[1] ^ cb[2] ^ cb[6] ^ cb[7] ^ cb[8] ^ 1;
p5 = cb[0] ^ cb[1] ^ cb[4] ^ cb[8] ^ 1;
p6 = cb[0] ^ cb[3] ^ cb[4] ^ cb[5] ^ cb[7] ^ 1;
p7 = cb[0] ^ cb[2] ^ cb[3] ^ cb[5] ^ cb[6] ^ cb[7] ^ cb[8];
p8 = cb[1] ^ cb[3] ^ cb[4] ^ cb[6] ^ cb[7] ^ cb[8];
p9 = cb[2] ^ cb[4] ^ cb[5] ^ cb[7] ^ cb[8];
p10 = cb[3] ^ cb[5] ^ cb[6] ^ cb[8] ^ 1;
p11 = cb[0] ^ cb[1] ^ cb[2] ^ cb[3] ^ cb[6] ^ 1;
print ' 0b{0:011b}'.format((p11<<10) | (p10<<9) | (p9<<8) |(p8<<7) | (p7<<6) | (p6<<5) | (p5<<4) | (p4<<3) | (p3<<2) | (p2<<1) | (p1)) + ', // ' + str(c);