led strand control with wii nunchuck

strander.ino

#include <Wire.h>
#include "WiiChuck.h"
#include <Adafruit_NeoPixel.h>

#define PIN 0
//#define N 232
#define N 62

// Parameter 1 = number of pixels in strip
// Parameter 2 = pin number (most are valid)
// Parameter 3 = pixel type flags, add together as needed:
//   NEO_KHZ800  800 KHz bitstream (most NeoPixel products w/WS2812 LEDs)
//   NEO_KHZ400  400 KHz (classic 'v1' (not v2) FLORA pixels, WS2811 drivers)
//   NEO_GRB     Pixels are wired for GRB bitstream (most NeoPixel products)
//   NEO_RGB     Pixels are wired for RGB bitstream (v1 FLORA pixels, not v2)
Adafruit_NeoPixel strip = Adafruit_NeoPixel(N, PIN, NEO_GRB + NEO_KHZ800);
WiiChuck chuck = WiiChuck();

void setup() {
  delay(3000);
  Serial.begin(115200);
  Serial.print("serial\n");  

  strip.begin();
  strip.show(); // Initialize all pixels to 'off'
  Serial.print("strip\n");  
  
  chuck.begin();
  chuck.update();
  Serial.print("chuck\n");  

}


uint32_t L = 5;

#define IDLE 0
#define XPOS 1
uint32_t state = IDLE;
uint32_t idle = 0;
uint32_t fire = 0;

uint32_t i = 0;
uint32_t T = 0;
uint32_t d = 0;
boolean up = true;

void loop() {
  T++;
  
  chuck.update(); 
  Serial.print(chuck.readJoyX());
  Serial.print(", ");  
  Serial.print(chuck.readJoyY());
  Serial.print(", ");  

  if (chuck.buttonZ) 
     Serial.print("Z");
  else  
     Serial.print("-");

  Serial.print(", ");  

  if (chuck.buttonC) 
     Serial.print("C");
  else  
     Serial.print("-");

  Serial.println();
  for (uint32_t j=0; j<N; j++) { strip.setPixelColor(j, strip.Color(0,0,0)); }

  
  if (state == IDLE) {
    uint16_t p = map(chuck.readJoyX(), -128, 128, 0, N-L);
    
    if (T % 4) {
      d++;
    }

    for (uint32_t j=0; j<L; j++) {
      strip.setPixelColor(j+i, Wheel(((j+i)*255/N + chuck.readJoyY() + d)*2 & 255));
      if (j+i > N) {
        strip.setPixelColor(j+i-N-1, Wheel(((j+i)*255/N + chuck.readJoyY() + d)*2 & 255));
      }
    }
    if ((abs(chuck.readJoyX()) > 50)) {
      state = XPOS;
    }
    if (T) {
      //if (up) { i++; } else {i--;}
      //if (i == N+L+2) {up = false;}
      //if (i == 0-L-2) {up = true;}
      i++;
      if(i >= N) {i = 0;}
    }  

} else if (state == XPOS) {
    uint16_t p = map(chuck.readJoyX(), -127, 128, 0, N-L);
    L = map(chuck.readJoyY(), -128, 128, 1, 30);
    
    if (abs(i - p) == 1) {i = p;}
    i = (i*3 + p) / 4;
    
    for (uint32_t j=0; j<L; j++) {
      strip.setPixelColor(j+i, Wheel(((j+i)*255/N + chuck.readJoyY() + T)*2 & 255));
    }
    
    if ((abs(chuck.readJoyX()) < 50)) {
      idle += 1;
    } else {
      idle = 0;
    }
    if (idle > 200) {
      idle = 0;
      state = IDLE;
    }
    
  }
  if (fire) {
      strip.setPixelColor(fire-3, strip.Color(0,0,0));    
      strip.setPixelColor(fire-2, strip.Color(128,128,128));    
      strip.setPixelColor(fire-1, strip.Color(255,255,255));    
      strip.setPixelColor(fire, strip.Color(255,255,255));    
      strip.setPixelColor(fire+2, strip.Color(128,128,128));    
      strip.setPixelColor(fire+3, strip.Color(0,0,0));    
      fire += 4;
      if (fire > N+4) {fire = 0;}
  } else {
    if (chuck.buttonZ) {fire = 1;}
  }

  strip.show();
  delay(5);

}


// Input a value 0 to 255 to get a color value.
// The colours are a transition r - g - b - back to r.
uint32_t Wheel(byte WheelPos) {
  if(WheelPos < 85) {
   return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
  } else if(WheelPos < 170) {
   WheelPos -= 85;
   return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);
  } else {
   WheelPos -= 170;
   return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);
  }
}