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- MeshCore-based Simple Sensor firmware - Heltec T114 without display - BME280 sensor support (temp/humidity/pressure) - Radio: 868.856018 MHz, SF7, BW62.5 kHz, CR4/7 - 2-byte path hash - PlatformIO project
33 lines
589 B
C++
33 lines
589 B
C++
#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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uint8_t _active = 0;
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public:
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RefCountedDigitalPin(uint8_t pin,uint8_t active=HIGH): _pin(pin), _active(active) { }
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void begin() {
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pinMode(_pin, OUTPUT);
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digitalWrite(_pin, !_active); // 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, _active);
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}
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}
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void release() {
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if (_claims == 0) return; // avoid negative _claims
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_claims--;
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if (_claims == 0) {
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digitalWrite(_pin, !_active);
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}
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}
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};
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