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#include <EEPROM.h>
#define PIN_OUTPUT_PSENSOR 17
#define PIN_OUTPUT_RLIGHTS 18
#define PIN_OUTPUT_FLIGHTS 7
#define PIN_OUTPUT_SPEAKER 10
#define PIN_INPUT_REVERSE 5
#define PIN_INPUT_HIGH_BEAM 6
#define PIN_INPUT_BTN_PSENSOR 2
#define PIN_INPUT_BTN_RLIGHTS 3
#define PIN_INPUT_BTN_FLIGHTS 4
#define TIMEOUT_AUTO_OFF 3000
#define TIMEOUT_NONE 0
#define BEEP_FREQ 1000
#define DEBOUNCE_DELAY_BUTTON 50L
#define DEBOUNCE_DELAY_SIGNAL 500L
#define LONG_PRESS_DURATION 1000L
#define PSENSOR_AUTO_ENABLE_ADDRESS 2
#define RLIGHTS_AUTO_ENABLE_ADDRESS 3
#define FLIGHTS_AUTO_ENABLE_ADDRESS 4
enum State {
OFF_AUTO,
ON_AUTO,
ON_MANUAL,
OFF_MANUAL,
};
enum State STATE_PSENSOR = OFF_AUTO;
enum State STATE_RLIGHTS = OFF_AUTO;
enum State STATE_FLIGHTS = OFF_AUTO;
unsigned long PSENSOR_TIMEOUT_TIMER = 0;
unsigned long RLIGHTS_TIMEOUT_TIMER = 0;
unsigned long FLIGHTS_TIMEOUT_TIMER = 0;
void fsm_tick_timer(
unsigned int outputPin,
enum State* state,
unsigned int sense,
unsigned int button,
unsigned long* timer,
unsigned long timeout,
unsigned int autoEnableAddress
) {
unsigned int autoEnable = EEPROM.read(autoEnableAddress);
if (sense && autoEnable)
*timer = millis();
unsigned int timer_expired = 0;
if ((millis() - (*timer)) > timeout)
timer_expired = 1;
switch (*state) {
case OFF_AUTO:
digitalWrite(outputPin, LOW);
if (sense && autoEnable) {
*state = ON_AUTO;
break;
}
if (button) {
*state = ON_MANUAL;
break;
}
break;
case ON_AUTO:
digitalWrite(outputPin, HIGH);
if (button) {
*state = OFF_MANUAL;
*timer = millis();
break;
}
if (sense && autoEnable) {
break;
}
if (timer_expired || (!autoEnable)) {
*state = OFF_AUTO;
break;
}
break;
case ON_MANUAL:
digitalWrite(outputPin, HIGH);
if (button) {
*state = OFF_AUTO;
break;
}
break;
case OFF_MANUAL:
digitalWrite(outputPin, LOW);
if (!sense && timer_expired) {
*state = OFF_AUTO;
break;
}
if (button) {
*state = ON_AUTO;
break;
}
break;
}
}
unsigned int debouncelp(
unsigned int pin,
bool* state,
bool* lastState,
unsigned long* lastDebounceTime,
unsigned long* buttonPressTime,
bool* longPressTriggered,
unsigned int autoEnableAddress
) {
int reading = digitalRead(pin);
unsigned int btnPressed = 0;
if (reading != (*lastState)) {
(*lastDebounceTime) = millis();
(*lastState) = reading;
}
if ((millis() - (*lastDebounceTime)) > DEBOUNCE_DELAY_BUTTON) {
if (reading != (*state)) {
(*state) = reading;
if ((*state) == LOW) {
(*buttonPressTime) = millis();
(*longPressTriggered) = false;
} else {
if (!(*longPressTriggered)) {
unsigned long pressDuration = millis() - (*buttonPressTime);
if (pressDuration < LONG_PRESS_DURATION) {
btnPressed = 1;
}
}
}
}
if ((*state) == LOW && !(*longPressTriggered)) {
if ((millis() - (*buttonPressTime)) >= LONG_PRESS_DURATION) {
*longPressTriggered = true;
unsigned int autoEnable = EEPROM.read(autoEnableAddress);
if (autoEnable) {
EEPROM.write(autoEnableAddress, 0);
tone(PIN_OUTPUT_SPEAKER, BEEP_FREQ, 80);
delay(150);
tone(PIN_OUTPUT_SPEAKER, BEEP_FREQ, 80);
} else {
EEPROM.write(autoEnableAddress, 1);
tone(PIN_OUTPUT_SPEAKER, BEEP_FREQ, 300);
}
}
}
}
return btnPressed;
}
unsigned int debouncesig(
unsigned int pin,
bool* state,
bool* lastState,
unsigned long* lastDebounceTime
) {
int reading = digitalRead(pin);
if (reading != (*lastState)) {
(*lastDebounceTime) = millis();
(*lastState) = reading;
}
if (reading != (*lastState))
(*lastDebounceTime) = millis();
if ((millis() - (*lastDebounceTime)) > DEBOUNCE_DELAY_SIGNAL)
if (reading != *state)
*state = reading;
*lastState = reading;
if ((*state) == HIGH)
return 1;
return 0;
}
void setup() {
pinMode(PIN_INPUT_REVERSE, INPUT);
pinMode(PIN_INPUT_HIGH_BEAM, INPUT);
pinMode(PIN_INPUT_BTN_PSENSOR, INPUT_PULLUP);
pinMode(PIN_INPUT_BTN_RLIGHTS, INPUT_PULLUP);
pinMode(PIN_INPUT_BTN_FLIGHTS, INPUT_PULLUP);
pinMode(PIN_OUTPUT_PSENSOR, OUTPUT);
pinMode(PIN_OUTPUT_RLIGHTS, OUTPUT);
pinMode(PIN_OUTPUT_FLIGHTS, OUTPUT);
}
#define DEBOUNCE_SIGNAL(Name, Pin) \
static bool Name##State = LOW; \
static bool Name##LastState = LOW; \
static unsigned long Name##LastDebounceTime = 0; \
unsigned int Name##Enabled = debouncesig(Pin, &Name##State, &Name##LastState, &Name##LastDebounceTime);
#define DEBOUNCE_BUTTON(Name, Pin, AutoEnable) \
static bool Name##State = HIGH; \
static bool Name##LastState = HIGH; \
static unsigned long Name##LastDebounceTime = 0; \
static unsigned long Name##ButtonPressTime = 0; \
static bool Name##LongPressTriggered = false; \
unsigned int Name##Pressed = debouncelp(Pin, &Name##State, &Name##LastState, &Name##LastDebounceTime, &Name##ButtonPressTime, &Name##LongPressTriggered, AutoEnable);
#define FSM(LName, UName, Signal, Timeout) \
DEBOUNCE_BUTTON(LName, PIN_INPUT_BTN_##UName, UName##_AUTO_ENABLE_ADDRESS) \
fsm_tick_timer(PIN_OUTPUT_##UName, &STATE_##UName, Signal, LName##Pressed, &UName##_TIMEOUT_TIMER, Timeout, UName##_AUTO_ENABLE_ADDRESS);
void loop() {
DEBOUNCE_SIGNAL(reverseSignal, PIN_INPUT_REVERSE)
DEBOUNCE_SIGNAL(highBeamSignal, PIN_INPUT_HIGH_BEAM)
FSM(psensor, PSENSOR, reverseSignalEnabled, TIMEOUT_AUTO_OFF)
FSM(rlights, RLIGHTS, reverseSignalEnabled, TIMEOUT_AUTO_OFF)
FSM(Flights, FLIGHTS, highBeamSignalEnabled, TIMEOUT_NONE)
}
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