// io-hub - Modular Input/Output. {{{ // // Copyright (C) 2013 Nicolas Schodet // // APBTeam: // Web: http://apbteam.org/ // Email: team AT apbteam DOT org // // 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. // // }}} #include "debounce.hh" Debounce::Debounce (ucoo::Io &io, int filter_depth) : io_ (io), filter_depth_ (filter_depth), state_ (io.get ()), filter_ (0) { } void Debounce::update () { bool now = io_.get (); // State unchanged, reset filter. if (now == state_) filter_ = 0; // State changed, should be kept stable for filter_depth_ updates until we // accept it. else if (filter_++ == filter_depth_) { state_ = now; filter_ = 0; } }