Initial commit

src/LED.cpp

@@ -0,0 +1,60 @@
+#include <Arduino.h>
+#include "LEDOutput.cpp"
+
+class LED{
+	LEDOutput* _output;
+	bool _on;
+	unsigned long _fadeDurationOn, _fadeDurationOff, _fadeStart, _fadeEnd;
+
+	unsigned long getFadeDuration(){
+		return _on ? _fadeDurationOn : _fadeDurationOff;
+	}
+
+	unsigned long getRemainingFadeTime(){
+		unsigned long now = millis();
+		return _fadeEnd >= now ? constrain(_fadeEnd - now, 0, getFadeDuration()) : 0;
+	}
+
+	float getMultiplier() {
+		float value = getRemainingFadeTime() / (float)getFadeDuration();
+		return 1.0f - value;
+	}
+
+	float getOutputMultiplier(){
+		float value = getMultiplier();
+		return _on ? value : 1.0f - value;
+	}
+
+	void reset(bool on){
+		if (on == _on)
+			return;
+		float oldMultiplier = getMultiplier();
+		_on = on;
+		_fadeStart = millis();
+		_fadeEnd = _fadeStart + (getFadeDuration() * oldMultiplier);
+	}
+
+public:
+	LED(LEDOutput* output, unsigned long fadeDurationOn, unsigned long fadeDurationOff) {
+		_output = output;
+		_fadeDurationOn = fadeDurationOn;
+		_fadeDurationOff = fadeDurationOff;
+	}
+
+	void on(){
+		reset(true);
+	}
+
+	void off(){
+		reset(false);
+	}
+
+	void toggle(){
+		reset(!_on);
+	}
+
+	void loop() {
+		float multiplier = getOutputMultiplier();
+		_output->writeFraction(1 - multiplier);
+	}
+};