APA102 LED Demo

apa102_test.ino

#include <FastLED.h>

#define NUM_LEDS 1

#define DATA_PIN 3
#define CLOCK_PIN 2

CRGB leds[NUM_LEDS];

int wheelStatus = 0;
float brightness = 1.0;

void setup() { 
  FastLED.addLeds<APA102, DATA_PIN, CLOCK_PIN, BGR>(leds, NUM_LEDS);
}

void loop() { 
  for(int i = 0; i < NUM_LEDS; i++){
    leds[i] = Wheel((i + wheelStatus) & 255);
  }
  FastLED.show();
  wheelStatus++;
  if (wheelStatus == 256)
    wheelStatus = 0;
  delay(100);
}


CRGB Wheel(byte WheelPos) {
  WheelPos = 255 - WheelPos;
  if (WheelPos < 85) {
    return CRGB((255 - WheelPos * 3) * brightness, 0, (WheelPos * 3) * brightness);
  }
  if (WheelPos < 170) {
    WheelPos -= 85;
    return CRGB(0, (WheelPos * 3) * brightness, (255 - WheelPos * 3) * brightness);
  }
  WheelPos -= 170;
  return CRGB((WheelPos * 3) * brightness, (255 - WheelPos * 3) * brightness, 0);
}