Funwheel fading lights

gistfile1.txt

//#include "FastLED.h"
#include <Adafruit_NeoPixel.h>

#define PIN            D1
#define TRIGGER        D2
#define DIRECTION      D3

// How many NeoPixels are attached to the Arduino?
#define NUMPIXELS      16
#define MAX_BRIGHTNESS 25 // allowed values 1-255

 #ifndef ADAFRUIT_NEOPIXEL_H
CRGB leds[NUMPIXELS];
#endif

int oldVal = LOW;
int newVal = LOW;
int forward = HIGH;

 #ifdef ADAFRUIT_NEOPIXEL_H
Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);
#endif


int delayval = 500; // delay for half a second

void setup() {
  pinMode(TRIGGER, INPUT);
 #ifdef ADAFRUIT_NEOPIXEL_H
  pixels.begin(); // This initializes the NeoPixel library.
 #endif
 #ifndef ADAFRUIT_NEOPIXEL_H
  FastLED.addLeds<WS2811, PIN, GRB>(leds, NUMPIXELS).setCorrection( TypicalLEDStrip );
 #endif

  delay(100);
  setAll(0);
  delay(200);
}

void loop() {

    forward = digitalRead(DIRECTION);
    newVal = digitalRead(TRIGGER);
    
    if(newVal != oldVal) {
      if(newVal == HIGH) {
        fadeIn();
      } else {
       fadeOut();
     }
     oldVal = newVal;
    } else {
      if(oldVal == HIGH) {
        setAll(MAX_BRIGHTNESS);
      } else {
        setAll(0);
      }
    }
  
  delay(20);
 }

void setPixel(int Pixel, byte red, byte green, byte blue) {
 #ifdef ADAFRUIT_NEOPIXEL_H
   // NeoPixel
   pixels.setPixelColor(Pixel, pixels.Color(red, green, blue));
 #endif
 #ifndef ADAFRUIT_NEOPIXEL_H
   // FastLED
   leds[Pixel].r = red;
   leds[Pixel].g = green;
   leds[Pixel].b = blue;
 #endif
}

void setAll(byte brightness) {
  if(forward) {
    for(int i = 0; i < NUMPIXELS/2; i++ ) {
      setPixel(i, brightness, brightness, brightness);
    }
    for(int i = NUMPIXELS/2; i < NUMPIXELS; i++) {
      setPixel(i, brightness, 0, 0);
    }    
  } else {
    for(int i = 0; i < NUMPIXELS/2; i++ ) {
      setPixel(i, brightness, 0, 0);
    }
    for(int i = NUMPIXELS/2; i < NUMPIXELS; i++) {
      setPixel(i, brightness, brightness, brightness);
    }    
  }
  showStrip();
}

void showStrip() {
 #ifdef ADAFRUIT_NEOPIXEL_H
   // NeoPixel
   pixels.show();
 #endif
 #ifndef ADAFRUIT_NEOPIXEL_H
   // FastLED
   FastLED.show();
 #endif
}

void fadeIn() {
      for(int k = 0; k < MAX_BRIGHTNESS+1; k++) {
      setAll(k);
      showStrip();
      delay(15);
    }
}

void fadeOut() {
      for(int k = MAX_BRIGHTNESS; k >= 0; k--) {
      setAll(k);
      showStrip();
      delay(15);
    }
}