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168 lines
4.8 KiB
168 lines
4.8 KiB
/*
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Original code:
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Debounce buttons and trigger events
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Copyright (C) 2015-2018 by Xose Pérez <xose dot perez at gmail dot com>
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The DebounceEvent library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser 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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The DebounceEvent library 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 Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the DebounceEvent library. If not, see <http://www.gnu.org/licenses/>.
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----------------------------------------------------------------------------------
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Copyright (C) 2020 by Maxim Prokhorov <prokhorov dot max at outlook dot com>
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Modified to include generic INPUT / OUTPUT pin support through a custom interface.
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Definitions are incompatible with DebounceEvent, you should not include it's headers.
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*/
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#include <functional>
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#include <memory>
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#include "libs/DebounceEvent.h"
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namespace debounce_event {
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EventEmitter::EventEmitter(types::Pin pin, types::EventHandler callback, const types::Config& config, unsigned long debounce_delay, unsigned long repeat) :
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_pin(pin),
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_callback(callback),
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_config(config),
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_is_switch(config.mode == types::Mode::Switch),
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_delay(debounce_delay),
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_repeat(repeat)
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{
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if (!pin) return;
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switch (_config.pin_mode) {
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case types::PinMode::InputPullup:
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_pin->pinMode(INPUT_PULLUP);
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break;
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case types::PinMode::InputPulldown:
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// ESP8266 does not have INPUT_PULLDOWN definition, and instead
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// has a GPIO16-specific INPUT_PULLDOWN_16:
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// - https://github.com/esp8266/Arduino/issues/478
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// - https://github.com/esp8266/Arduino/commit/1b3581d55ebf0f8c91e081f9af4cf7433d492ec9
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#ifdef ESP8266
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if (_pin->pin == 16) {
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_pin->pinMode(INPUT_PULLDOWN_16);
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} else {
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_pin->pinMode(INPUT);
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}
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#else
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_pin->pinMode(INPUT_PULLDOWN);
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#endif
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break;
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case types::PinMode::Input:
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_pin->pinMode(INPUT);
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break;
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}
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switch (config.default_value) {
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case types::PinValue::Low:
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_default_value = false;
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break;
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case types::PinValue::High:
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_default_value = true;
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break;
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case types::PinValue::Initial:
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_default_value = ((HIGH) == _pin->digitalRead());
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break;
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}
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_value = _default_value;
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}
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EventEmitter::EventEmitter(types::Pin pin, const types::Config& config, unsigned long delay, unsigned long repeat) :
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EventEmitter(pin, nullptr, config, delay, repeat)
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{}
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bool EventEmitter::isPressed() {
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return (_value != _default_value);
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}
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const types::Pin EventEmitter::getPin() const {
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return _pin;
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}
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const types::Config EventEmitter::getConfig() const {
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return _config;
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}
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unsigned long EventEmitter::getEventLength() {
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return _event_length;
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}
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unsigned long EventEmitter::getEventCount() {
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return _event_count;
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}
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// TODO: current implementation allows pin == nullptr
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types::Event EventEmitter::loop() {
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static_assert((HIGH) == 1, "Arduino API HIGH is not 1");
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static_assert((LOW) == 0, "Arduino API LOW is not 0");
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auto event = types::EventNone;
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bool value = _pin->digitalRead() == (HIGH);
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if (value != _value) {
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// TODO: check each loop instead of blocking?
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auto start = millis();
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while (millis() - start < _delay) delay(1);
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value = _pin->digitalRead() == (HIGH);
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if (value != _value) {
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_value = !_value;
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if (_is_switch) {
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event = isPressed()
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? types::EventPressed
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: types::EventReleased;
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} else {
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if (_value == _default_value) {
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_event_length = millis() - _event_start;
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_ready = true;
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} else {
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event = types::EventPressed;
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_event_start = millis();
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_event_length = 0;
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if (_reset_count) {
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_event_count = 1;
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_reset_count = false;
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} else {
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++_event_count;
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}
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_ready = false;
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}
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}
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}
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}
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if (_ready && (millis() - _event_start > _repeat)) {
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_ready = false;
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_reset_count = true;
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event = types::EventReleased;
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}
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if (_callback && (event != types::EventNone)) {
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_callback(*this, event, _event_count, _event_length);
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}
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return event;
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}
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} // namespace debounce_event
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