119 lines
3.0 KiB
C++
119 lines
3.0 KiB
C++
/*
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* LED Fading mit NodeMCU v 1.0
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*
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* (c) Nikos Papagiannopoulos
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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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 ledRedIntensityStart;
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byte ledGreenIntensityStart;
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byte ledBlueIntensityStart;
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byte ledRedIntensityCur;
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byte ledGreenIntensityCur;
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byte ledBlueIntensityCur;
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byte ledRedIntensityTo;
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byte ledGreenIntensityTo;
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byte ledBlueIntensityTo;
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long timeStart;
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long timeEnd;
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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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ledRedIntensityStart = 0;
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ledGreenIntensityStart = 0;
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ledBlueIntensityStart = 0;
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ledRedIntensityCur = ledRedIntensityStart;
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ledGreenIntensityCur = ledGreenIntensityStart;
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ledBlueIntensityCur = ledBlueIntensityStart;
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ledRedIntensityTo = ledRedIntensityStart;
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ledGreenIntensityTo = ledGreenIntensityStart;
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ledBlueIntensityTo = ledBlueIntensityStart;
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timeStart = 0;
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timeEnd = 0;
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}
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public:
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void ChangeColor(byte redIntesity, byte greenIntensity, byte blueIntensity, long duration)
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{
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if (millis() > timeEnd) {
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timeStart = millis();
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timeEnd = timeStart + duration;
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ledRedIntensityStart = ledRedIntensityCur;
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ledGreenIntensityStart = ledGreenIntensityCur;
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ledBlueIntensityStart = ledBlueIntensityCur;
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ledRedIntensityTo = redIntesity;
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ledGreenIntensityTo = greenIntensity;
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ledBlueIntensityTo = blueIntensity;
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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 (currentMillis <= timeEnd) {
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ledRedIntensityCur = lerp(ledRedIntensityStart, ledRedIntensityTo, timeStart, timeEnd, currentMillis);
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ledGreenIntensityCur = lerp(ledGreenIntensityStart, ledGreenIntensityTo, timeStart, timeEnd, currentMillis);
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ledBlueIntensityCur = lerp(ledBlueIntensityStart, ledBlueIntensityTo, timeStart, timeEnd, currentMillis);
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UpdateLEDs();
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}
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}
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bool Finished() {
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return millis() > timeEnd;
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}
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byte lerp(byte intensityStart, byte intensityEnd, long timeStart, long timeEnd, long timeCurrent) {
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long result = ( ( timeCurrent - timeStart ) * ( intensityEnd - intensityStart) / ( timeEnd - timeStart) ) + intensityStart;
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return (byte) result;
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}
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void UpdateLEDs() {
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analogWrite(ledRedPin, ledRedIntensityCur * 4); // correction for NodeMCU 0 - 1023
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analogWrite(ledGreenPin, ledGreenIntensityCur * 4);
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analogWrite(ledBluePin, ledBlueIntensityCur * 4);
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}
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};
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RgbLed ledStripe(5, 4, 0);
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int foo = 0;
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void setup() {
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Serial.begin(115200);
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}
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void loop()
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{
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if (ledStripe.Finished() && foo == 0) {
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foo = 1;
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ledStripe.ChangeColor(0, 0, 0, 2000);
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}
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if (ledStripe.Finished() && foo == 1) {
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foo = 0;
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ledStripe.ChangeColor(255, 255, 255, 2000);
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}
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ledStripe.Update(millis());
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}
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