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#pragma once
#include <Arduino.h>
class RefCountedDigitalPin {
uint8_t _pin;
int8_t _claims = 0;
uint8_t _active = 0;
public:
RefCountedDigitalPin(uint8_t pin,uint8_t active=HIGH): _pin(pin), _active(active) { }
void begin() {
pinMode(_pin, OUTPUT);
digitalWrite(_pin, !_active); // initial state
}
void claim() {
_claims++;
if (_claims > 0) {
digitalWrite(_pin, _active);
}
}
void release() {
if (_claims == 0) return; // avoid negative _claims
_claims--;
if (_claims == 0) {
digitalWrite(_pin, !_active);
}
}
};
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