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111 lines
2.8 KiB
111 lines
2.8 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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static bool pending = false;
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bool changed = false;
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_event = EVENT_NONE;
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if (digitalRead(_pin) != _status) {
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// Debounce
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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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pending = false;
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_status = newStatus;
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// released
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if (_status == _defaultStatus) {
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// get event
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if (millis() - _this_start > LONG_CLICK_DELAY) {
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_event = EVENT_LONG_CLICK;
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} else if (millis() - _last_start < DOUBLE_CLICK_DELAY ) {
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_event = EVENT_DOUBLE_CLICK;
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} else {
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Serial.println("deferring");
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changed = false;
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pending = true;
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//_event = EVENT_SINGLE_CLICK;
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}
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// pressed
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} else {
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_last_start = _this_start;
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_this_start = millis();
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_event = EVENT_PRESSED;
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}
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}
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}
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if (pending && (millis() - _this_start > DOUBLE_CLICK_DELAY) && (!changed) && (_status == _defaultStatus)) {
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Serial.println("catched");
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pending = false;
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changed = true;
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_event = EVENT_SINGLE_CLICK;
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}
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if (changed) {
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if (_callback) {
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_callback(_pin, EVENT_CHANGED);
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_callback(_pin, _event);
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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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uint8_t DebounceEvent::getEvent() {
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return _event;
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}
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