RNode_Firmware/Input.h

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2024-05-01 17:13:26 -06:00
// Copyright (C) 2024, Mark Qvist
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
#ifndef INPUT_H
#define INPUT_H
#define PIN_BUTTON pin_btn_usr1
#define PRESSED LOW
#define RELEASED HIGH
#define EVENT_ALL 0x00
#define EVENT_CLICKS 0x01
#define EVENT_BUTTON_DOWN 0x11
#define EVENT_BUTTON_UP 0x12
#define EVENT_BUTTON_CLICK 0x13
#define EVENT_BUTTON_DOUBLE_CLICK 0x14
#define EVENT_BUTTON_TRIPLE_CLICK 0x15
int button_events = EVENT_CLICKS;
int button_state = RELEASED;
int debounce_state = button_state;
unsigned long button_debounce_last = 0;
unsigned long button_debounce_delay = 25;
unsigned long button_down_last = 0;
unsigned long button_up_last = 0;
// Forward declaration
void button_event(uint8_t event, unsigned long duration);
void input_init() {
pinMode(PIN_BUTTON, INPUT_PULLUP);
}
void input_get_all_events() {
button_events = EVENT_ALL;
}
void input_get_click_events() {
button_events = EVENT_CLICKS;
}
void input_read() {
int button_reading = digitalRead(PIN_BUTTON);
if (button_reading != debounce_state) {
button_debounce_last = millis();
debounce_state = button_reading;
}
if ((millis() - button_debounce_last) > button_debounce_delay) {
if (button_reading != button_state) {
// State changed
int previous_state = button_state;
button_state = button_reading;
if (button_events == EVENT_ALL) {
if (button_state == PRESSED) {
button_event(EVENT_BUTTON_DOWN, 0);
} else if (button_state == RELEASED) {
button_event(EVENT_BUTTON_UP, 0);
}
} else if (button_events == EVENT_CLICKS) {
if (previous_state == PRESSED && button_state == RELEASED) {
button_up_last = millis();
button_event(EVENT_BUTTON_CLICK, button_up_last-button_down_last);
} else if (previous_state == RELEASED && button_state == PRESSED) {
button_down_last = millis();
}
}
}
}
}
bool button_pressed() {
if (button_state == PRESSED) {
return true;
} else {
return false;
}
}
#endif