95 lines
2.8 KiB
C
95 lines
2.8 KiB
C
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// Copyright (C) 2024, Mark Qvist
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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 <https://www.gnu.org/licenses/>.
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#ifndef INPUT_H
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#define INPUT_H
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#define PIN_BUTTON pin_btn_usr1
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#define PRESSED LOW
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#define RELEASED HIGH
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#define EVENT_ALL 0x00
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#define EVENT_CLICKS 0x01
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#define EVENT_BUTTON_DOWN 0x11
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#define EVENT_BUTTON_UP 0x12
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#define EVENT_BUTTON_CLICK 0x13
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#define EVENT_BUTTON_DOUBLE_CLICK 0x14
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#define EVENT_BUTTON_TRIPLE_CLICK 0x15
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int button_events = EVENT_CLICKS;
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int button_state = RELEASED;
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int debounce_state = button_state;
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unsigned long button_debounce_last = 0;
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unsigned long button_debounce_delay = 25;
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unsigned long button_down_last = 0;
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unsigned long button_up_last = 0;
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// Forward declaration
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void button_event(uint8_t event, unsigned long duration);
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void input_init() {
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pinMode(PIN_BUTTON, INPUT_PULLUP);
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}
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void input_get_all_events() {
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button_events = EVENT_ALL;
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}
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void input_get_click_events() {
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button_events = EVENT_CLICKS;
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}
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void input_read() {
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int button_reading = digitalRead(PIN_BUTTON);
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if (button_reading != debounce_state) {
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button_debounce_last = millis();
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debounce_state = button_reading;
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}
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if ((millis() - button_debounce_last) > button_debounce_delay) {
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if (button_reading != button_state) {
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// State changed
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int previous_state = button_state;
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button_state = button_reading;
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if (button_events == EVENT_ALL) {
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if (button_state == PRESSED) {
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button_event(EVENT_BUTTON_DOWN, 0);
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} else if (button_state == RELEASED) {
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button_event(EVENT_BUTTON_UP, 0);
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}
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} else if (button_events == EVENT_CLICKS) {
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if (previous_state == PRESSED && button_state == RELEASED) {
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button_up_last = millis();
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button_event(EVENT_BUTTON_CLICK, button_up_last-button_down_last);
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} else if (previous_state == RELEASED && button_state == PRESSED) {
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button_down_last = millis();
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}
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}
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}
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}
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}
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bool button_pressed() {
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if (button_state == PRESSED) {
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return true;
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} else {
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return false;
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}
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}
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#endif
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