hogwarts.ino

#include <FastLED.h>

#define NUM_LEDS 23  
#define BRIGHTNESS_LEDS 84  // set within 0-100 for max brightnetss

//#define MAX_CYCLES 3 
#define DATA_PIN 1  // pin the data line is connected to

// Define the array of leds
CRGB leds[NUM_LEDS];

void setup() { 
  Serial.begin(57600);
  Serial.println("resetting");
  LEDS.addLeds<WS2812,DATA_PIN,RGB>(leds,NUM_LEDS);
  LEDS.setBrightness(BRIGHTNESS_LEDS);
  //pinMode(LED_BUILTIN, OUTPUT);
}

void fadeall() { for(int i = 0; i < NUM_LEDS; i++) { leds[i].nscale8(225); } }  // 250
void fadeall2(int fade) { for(int i = 0; i < NUM_LEDS; i++) { leds[i].nscale8(fade); } }  // 250

bool cycle_0(uint8_t &hue) {

  uint8_t hue_copy = hue;
  bool result = false;

  for(int i = 0; i < NUM_LEDS; i++) { 
    leds[i] = CHSV(hue++, 255, 255);
    FastLED.show(); 
    fadeall();
    delay(40);
  }

  if (hue_copy > hue) {
    // the hue cycled.
    Serial.print(hue_copy);
    Serial.print(" ");
    Serial.println(hue);
    result = true;
  } 

  return result;
}

bool cycle_1(uint8_t &hue) {

  uint8_t hue_copy = hue;
  bool result = false;

  hue = hue + 20;
  
  for(int i = 0; i < NUM_LEDS; i++) {
    leds[i] = CHSV(hue, 255, 255);
    FastLED.show(); 
    //fadeall();
    delay(40);
  } 

  if (hue_copy > hue) {
    // the hue cycled.
    Serial.print(hue_copy);
    Serial.print(" ");
    Serial.println(hue);
    result = true;
  } 

  return result;
}

bool cycle_2(uint8_t &hue) {

  uint8_t hue_copy = hue;
  bool result = false;
  
  hue++;
  
  for(int i = 0; i < NUM_LEDS; i++) {
    leds[i] = CHSV(hue, 255, 255);
  }
  
  FastLED.show(); 
  delay(60);

  if (hue_copy > hue) {
    // the hue cycled.
    Serial.print(hue_copy);
    Serial.print(" ");
    Serial.println(hue);
    result = true;
  } 

  return result;
}

bool cycle_3(uint8_t &hue) {

  uint8_t hue_copy = hue;
  bool result = false;
  
  hue = hue + 30;

  const size_t n = sizeof(leds) / sizeof(leds[0]);
  for (size_t i = 0; i < n - 1; i++)
  {
      size_t j = random(0, n - i);
      leds[j] = CHSV(hue, 255, 255);
      FastLED.show(); 
      fadeall();
      delay(80);
  }

  if (hue_copy > hue) {
    result = true;
  } 

  return result;
}

bool cycle_4() {

  for(int i = 0; i < NUM_LEDS/2; i++) { 
    leds[i] = CRGB(255, 255, 255);
    leds[i+(NUM_LEDS/2)] = CRGB(255, 255, 255);
    FastLED.show(); 
    fadeall2(150);
    delay(80);
  }
}

void loop() { 
    // unsigned integer can only hold 255 values. 
    // after 255 it loops back around to 0
    static uint8_t hue = 0;
    static uint8_t cycle = 0;

    switch (cycle) {
        case 0:
          Serial.print("cycle_0 hue:");
          Serial.print(hue);
          Serial.print(" cycle: ");
          Serial.println(cycle);
          if (cycle_0(hue)) cycle++;
          break;
        case 1:
          Serial.print("cycle_1 hue:");
          Serial.print(hue);
          Serial.print(" cycle: ");
          Serial.println(cycle);
          if (cycle_1(hue)) cycle++;
          break;
        case 2:
          Serial.print("cycle_2 hue:");
          Serial.print(hue);
          Serial.print(" cycle: ");
          Serial.println(cycle);
          if (cycle_2(hue)) cycle++;
          break;
        case 3:
          Serial.print("cycle_3 hue:");
          Serial.print(hue);
          Serial.print(" cycle: ");
          Serial.println(cycle);
          if (cycle_3(hue)) cycle++;
          break; 
        case 4:
           cycle_4();
           cycle_4();
           cycle_4();
           cycle_4();
           cycle++;
           break;
        default:
          Serial.println("resetting cycle");
          cycle = 0;
          break; 
    }
}