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// This is a 'majority-of-3' component for LinuxCNC HAL
// Copyright 2006 Jeff Epler <jepler@unpythonic.net>
//
// 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 of the License, 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; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
component maj3 "Compute the majority of 3 inputs";
pin in bit in1;
pin in bit in2;
pin in bit in3;
pin out bit out;
param rw bit invert;
function _ nofp;
license "GPL";
author "Jeff Epler";
;;
MODULE_AUTHOR("Jeff Epler");
MODULE_DESCRIPTION("'Majority of 3' block for EMC HAL");
FUNCTION(_) {
int sum = 0;
if (in1) sum++;
if (in2) sum++;
if (in3) sum++;
if(invert)
out = sum < 2;
else
out = sum >= 2;
}
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