91 lines
2.5 KiB
C++
91 lines
2.5 KiB
C++
/*
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LED Fading mit NodeMCU v 1.0
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*/
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class RgbLed {
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int ledRedPin;
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int ledGreenPin;
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int ledBluePin;
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byte ledRedIntensity;
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byte ledGreenIntensity;
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byte ledBlueIntensity;
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byte ledRedIntensityTo;
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byte ledGreenIntensityTo;
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byte ledBlueIntensityTo;
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long durationLeft;
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long previousMillis;
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public:
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RgbLed(int redPin, int greenPin, int bluePin)
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{
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ledRedPin = redPin;
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ledGreenPin = greenPin;
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ledBluePin = bluePin;
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pinMode(ledRedPin, OUTPUT);
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pinMode(ledGreenPin, OUTPUT);
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pinMode(ledBluePin, OUTPUT);
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ledRedIntensity = 0;
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ledGreenIntensity = 0;
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ledBlueIntensity = 0;
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ledRedIntensityTo = ledRedIntensity;
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ledGreenIntensityTo = ledGreenIntensity;
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ledBlueIntensityTo = ledBlueIntensity;
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durationLeft = 0;
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previousMillis = 0;
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}
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public:
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void ChangeColor(int redIntesity, int greenIntensity, int blueIntensity, long duration)
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{
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if (ledRedIntensityTo == ledRedIntensity && ledGreenIntensityTo == ledGreenIntensity && ledBlueIntensityTo == ledBlueIntensity
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&& ledRedIntensity != redIntesity && ledGreenIntensity != greenIntensity && ledBlueIntensity != blueIntensity) {
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durationLeft = duration;
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ledRedIntensityTo = ledRedIntensity;
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ledGreenIntensityTo = ledGreenIntensity;
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ledBlueIntensityTo = ledBlueIntensity;
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}
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}
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public:
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void Update(long currentMillis)
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{
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if (ledRedIntensityTo != ledRedIntensity && ledGreenIntensityTo != ledGreenIntensity && ledBlueIntensityTo != ledBlueIntensity) {
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ledRedIntensity = lerp(ledRedIntensity, ledRedIntensityTo, previousMillis, previousMillis + durationLeft, currentMillis);
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ledGreenIntensity = lerp(ledGreenIntensity, ledGreenIntensityTo, previousMillis, previousMillis + durationLeft, currentMillis);
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ledBlueIntensity = lerp(ledBlueIntensity, ledBlueIntensityTo, previousMillis, previousMillis + durationLeft, currentMillis);
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UpdateLEDs();
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}
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durationLeft = durationLeft - (currentMillis - previousMillis);
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previousMillis = currentMillis;
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}
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byte lerp(byte intensityStart, byte intensityEnd, long timeStart, long timeEnd, long timeCurrent) {
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return ( ( timeCurrent - timeStart )( intensityEnd - intensityStart) / ( timeEnd - timeStart) ) + intensityStart;
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}
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void UpdateLEDs() {
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digitalWrite(ledRedPin, ledRedIntensity);
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digitalWrite(ledGreenPin, ledGreenIntensity);
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digitalWrite(ledBluePin, ledBlueIntensity);
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}
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};
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RgbLed ledStripe(5, 4, 0);
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void setup() {
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}
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void loop()
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{
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ledStripe.ChangeColor(30, 200, 255, 1000);
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ledStripe.Update(millis());
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}
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