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29 lines
459 B
29 lines
459 B
#pragma once
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#include <Arduino.h>
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class RefCountedDigitalPin {
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uint8_t _pin;
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int8_t _claims = 0;
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public:
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RefCountedDigitalPin(uint8_t pin): _pin(pin) { }
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void begin() {
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pinMode(_pin, OUTPUT);
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digitalWrite(_pin, LOW); // initial state
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}
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void claim() {
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_claims++;
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if (_claims > 0) {
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digitalWrite(_pin, HIGH);
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}
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}
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void release() {
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_claims--;
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if (_claims == 0) {
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digitalWrite(_pin, LOW);
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}
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}
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};
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