87 lines
1.9 KiB
C++
87 lines
1.9 KiB
C++
/*
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* This file is part of the "bluetoothheater" distribution
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* (https://gitlab.com/mrjones.id.au/bluetoothheater)
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*
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* Copyright (C) 2018 Ray Jones <ray@mrjones.id.au>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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*/
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#include <Arduino.h>
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#include "Debounce.h"
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CDebounce::CDebounce()
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{
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_pinActiveState = LOW;
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_prevPins = 0;
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_lastDebounceTime = 0;
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_debounceDelay = 50;
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}
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void
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CDebounce::addPin(int pin)
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{
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if(pin && (_pins.size() < 8)) {
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_pins.push_back(pin);
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pinMode(pin, INPUT_PULLUP); // GPIO input pin #1
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}
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}
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void
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CDebounce::setActiveState(int activeState)
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{
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_pinActiveState = activeState;
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}
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uint8_t
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CDebounce::getState()
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{
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return _debouncedPins;
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}
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uint8_t
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CDebounce::manage()
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{
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return _scanInputs();
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}
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uint8_t
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CDebounce::_scanInputs()
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{
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uint8_t newPins = 0;
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uint8_t mask = 0x01;
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for(int i = 0; i < _pins.size(); i++) {
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if(digitalRead(_pins[i]) == _pinActiveState)
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newPins |= mask;
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mask <<= 1;
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}
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if(newPins != _prevPins) {
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_lastDebounceTime = millis();
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_prevPins = newPins;
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}
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long elapsed = millis() - _lastDebounceTime;
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if (elapsed > _debounceDelay) {
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// whatever the reading is at, it's been there for longer than the debounce
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// delay, so take it as the actual current state:
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_debouncedPins = newPins;
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}
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return _debouncedPins;
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}
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