// Adafruit_NeoMatrix example for single NeoPixel Shield.
// Scrolls text across the matrix.

#include <Adafruit_GFX.h>
#include <Adafruit_NeoMatrix.h>
#include <Adafruit_NeoPixel.h>

#define PIN 6
#define BRIGHTNESS 255

// Define matrix width and height.
#define mw 40
#define mh 11

// MATRIX DECLARATION:
// Parameter 1 = width of NeoPixel matrix
// Parameter 2 = height of matrix
// Parameter 3 = pin number (most are valid)
// Parameter 4 = matrix layout flags, add together as needed:
//   NEO_MATRIX_TOP, NEO_MATRIX_BOTTOM, NEO_MATRIX_LEFT, NEO_MATRIX_RIGHT:
//     Position of the FIRST LED in the matrix; pick two, e.g.
//     NEO_MATRIX_TOP + NEO_MATRIX_LEFT for the top-left corner.
//   NEO_MATRIX_ROWS, NEO_MATRIX_COLUMNS: LEDs are arranged in horizontal
//     rows or in vertical columns, respectively; pick one or the other.
//   NEO_MATRIX_PROGRESSIVE, NEO_MATRIX_ZIGZAG: all rows/columns proceed
//     in the same order, or alternate lines reverse direction; pick one.
//   See example below for these values in action.
// Parameter 5 = 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_GRBW    Pixels are wired for GRBW bitstream (RGB+W NeoPixel products)
//   NEO_RGB     Pixels are wired for RGB bitstream (v1 FLORA pixels, not v2)


// Example for NeoPixel Shield.  In this application we'd like to use it
// as a 5x8 tall matrix, with the USB port positioned at the top of the
// Arduino.  When held that way, the first pixel is at the top right, and
// lines are arranged in columns, progressive order.  The shield uses
// 800 KHz (v2) pixels that expect GRB color data.

Adafruit_NeoMatrix matrix = Adafruit_NeoMatrix( mw, mh, PIN,
  NEO_MATRIX_TOP  + NEO_MATRIX_LEFT +
  NEO_MATRIX_ROWS + NEO_MATRIX_PROGRESSIVE,
  NEO_GRB         + NEO_KHZ800);

const uint16_t colors[] = {
  matrix.Color(255, 0, 0), 
  matrix.Color(0, 255, 0), 
  matrix.Color(0, 0, 255) };

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

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

  matrix.fillScreen( matrix.Color(200, 200, 200) );
  matrix.show();
  delay(2000);
}

void loop() 
{
  matrix.fillScreen( matrix.Color(0, 0, 0) );
  matrix.setCursor(x, 2);
  matrix.print( F("Hello World!!") );

  if(--x < -45) 
  {
    x = matrix.width();
    if(++pass >= 3) pass = 0;
    matrix.setTextColor( colors[pass] );
  }
  matrix.show();
  delay( 50 );
}