Marquee Party Bag

Contributors: Feldi

Example Code

I am providing two separate programs for you to work with:

• Marquee
• Simple Rainbow Cycle

Example 1: Marquee

The first is the Marquee option. I have added a handful of comments in the code to show you how and where to edit for customization.

language:c
//Marquee Party bag by Melissa Felderman for SparkFun Electronics. 
// Based on Adafruit_NeoMatrix example for single NeoPixel Shield.
// Scrolls 'PARTY BAG!' across the matrix in a landscape (horizontal) orientation.

#include <Adafruit_GFX.h> //include graphics library
#include <Adafruit_NeoMatrix.h> //include neopixel matrix library
#include <Adafruit_NeoPixel.h> //include neopixel library
#ifndef PSTR
 #define PSTR // Make Arduino Due happy
#endif

#define PIN 2

Adafruit_NeoMatrix matrix = Adafruit_NeoMatrix(8, 8, 3, 1, PIN,
  NEO_MATRIX_TOP     + NEO_MATRIX_LEFT +
  NEO_MATRIX_ROWS + NEO_MATRIX_PROGRESSIVE,
  NEO_GRB            + NEO_KHZ800);

//Inlcude the colors that you would like your writing to reflect in the colors array
const uint16_t colors[] = {
  matrix.Color(255, 0, 0), matrix.Color(0, 255, 0), matrix.Color(0, 0, 255) };


void setup() {
  matrix.begin();
  matrix.setTextWrap(false);
  matrix.setBrightness(40);
  matrix.setTextColor(colors[0]);
}

int x    = matrix.width();
int pass = 0;

void loop() {
  matrix.fillScreen(0);
  matrix.setCursor(x, 0);
  matrix.print(F("PARTY BAG!")); //replace 'PARTY BAG!' with your personal message
  if(--x < -36) {
    x = matrix.width();
    if(++pass >= 3) pass = 0; //if you included more than three colors in the color array, change the number in the if statement to reflect that amount
    matrix.setTextColor(colors[pass]);
  }
  matrix.show();
  delay(100);
}

Example 2: Simple Rainbow Cycle

The second is a simple rainbow cycle.

language:c
//rainbow LED bag by Melissa Felderman for Spsarfun
//This sketch is an edited version of the Adafruit Neopixel Strand Test example code from the Neopixel Library. 

#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
  #include <avr/power.h>
#endif

#define PIN 2


Adafruit_NeoPixel strip = Adafruit_NeoPixel(198, PIN, NEO_GRB + NEO_KHZ800);


void setup() {
  // This is for Trinket 5V 16MHz, you can remove these three lines if you are not using a Trinket
  #if defined (__AVR_ATtiny85__)
    if (F_CPU == 16000000) clock_prescale_set(clock_div_1);
  #endif
  // End of trinket special code


  strip.begin();
  strip.show(); // Initialize all pixels to 'off'
}

void loop() {


  rainbow(20);
  rainbowCycle(20);
  theaterChaseRainbow(50);
}


void rainbow(uint8_t wait) {
  uint16_t i, j;

  for(j=0; j<256; j++) {
    for(i=0; i<strip.numPixels(); i++) {
      strip.setPixelColor(i, Wheel((i+j) & 255));
    }
    strip.show();
    delay(wait);
  }
}

// Slightly different, this makes the rainbow equally distributed throughout
void rainbowCycle(uint8_t wait) {
  uint16_t i, j;

  for(j=0; j<256*5; j++) { // 5 cycles of all colors on wheel
    for(i=0; i< strip.numPixels(); i++) {
      strip.setPixelColor(i, Wheel(((i * 256 / strip.numPixels()) + j) & 255));
    }
    strip.show();
    delay(wait);
  }
}



//Theatre-style crawling lights with rainbow effect
void theaterChaseRainbow(uint8_t wait) {
  for (int j=0; j < 256; j++) {     // cycle all 256 colors in the wheel
    for (int q=0; q < 3; q++) {
      for (int i=0; i < strip.numPixels(); i=i+3) {
        strip.setPixelColor(i+q, Wheel( (i+j) % 255));    //turn every third pixel on
      }
      strip.show();

      delay(wait);

      for (int i=0; i < strip.numPixels(); i=i+3) {
        strip.setPixelColor(i+q, 0);        //turn every third pixel off
      }
    }
  }
}

// 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) {
  WheelPos = 255 - WheelPos;
  if(WheelPos < 85) {
    return strip.Color(255 - WheelPos * 3, 0, WheelPos * 3);
  }
  if(WheelPos < 170) {
    WheelPos -= 85;
    return strip.Color(0, WheelPos * 3, 255 - WheelPos * 3);
  }
  WheelPos -= 170;
  return strip.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
}

When you are ready, pick your program, copy it, and paste it into a new window in your Arduino IDE. Make sure the correct board is selected by going to Tools > Board > Lilypad Arduino USB. Then, connected your Lilypad to your computer via USB. Turn the Lilypad on, and select the active port from Tools > Port. Now all you need to do is upload the program to your Lilypad by hitting the upload button!