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78 lines
2.0 KiB
78 lines
2.0 KiB
/*
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Debounce buttons and trigger events
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Copyright (C) 2015 by Xose Pérez <xose dot perez at gmail dot com>
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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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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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <Arduino.h>
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#include "DebounceEvent.h"
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DebounceEvent::DebounceEvent(uint8_t pin, callback_t callback, uint8_t defaultStatus, unsigned long delay) {
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// store configuration
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_pin = pin;
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_status = _defaultStatus = defaultStatus;
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_delay = delay;
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_callback = callback;
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// set up button
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if (_defaultStatus == LOW) {
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pinMode(_pin, INPUT);
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} else {
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pinMode(_pin, INPUT_PULLUP);
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}
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}
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bool DebounceEvent::loop() {
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// holds whether status has changed or not
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bool changed = false;
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if (digitalRead(_pin) != _status) {
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delay(_delay);
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uint8_t newStatus = digitalRead(_pin);
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if (newStatus != _status) {
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changed = true;
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_status = newStatus;
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// raise events if callback defined
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if (_callback) {
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// raise change event
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_callback(_pin, EVENT_CHANGED);
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if (_status == _defaultStatus) {
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// raise released event
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_callback(_pin, EVENT_RELEASED);
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} else {
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// raise pressed event
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_callback(_pin, EVENT_PRESSED);
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}
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}
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}
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}
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return changed;
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}
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bool DebounceEvent::pressed() {
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return (_status != _defaultStatus);
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}
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