// Adafruit_NeoMatrix example for single NeoPixel Shield.
// Scrolls 'Howdy' across the matrix in a portrait (vertical) orientation.
#include <Adafruit_GFX.h>
#include <Adafruit_NeoMatrix.h>
#include <Adafruit_NeoPixel.h>
#ifndef PSTR
#define PSTR // Make Arduino Due happy
#endif
#define PIN 2
// 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(16, 16, PIN,
NEO_MATRIX_TOP + NEO_MATRIX_RIGHT +
NEO_MATRIX_COLUMNS + NEO_MATRIX_PROGRESSIVE,
NEO_GRB + NEO_KHZ800);
int16_t x = matrix.width();
uint8_t color_index = 0;
char text[] = "ARVIND PATIL";
int scroll_limit = sizeof(text) * 6; // each text character is 6 pixels wide
void setup() {
matrix.begin();
matrix.setTextWrap(false);
matrix.setBrightness(240);
matrix.setTextColor(matrix.Color(255, 0, 0)); // default color is red
}
void loop() {
matrix.fillScreen(0);
matrix.setCursor(x, 0);
matrix.print(text);
if(--x < -scroll_limit) {
x = matrix.width();
color_index = 0; // reset the rainbow color index
}
matrix.setTextColor(color_wheel(color_index));
color_index += max(1, 256 / scroll_limit);
matrix.show();
delay(300);
}
uint16_t color_wheel(uint8_t pos) {
pos = 255 - pos;
if(pos < 85) {
// return ((uint32_t)(255 - pos * 3) << 16) | ((uint32_t)(0) << 8) | (pos * 3);
return matrix.Color((uint16_t)(255 - pos * 3), 0, (pos * 3));
} else if(pos < 170) {
pos -= 85;
// return ((uint32_t)(0) << 16) | ((uint32_t)(pos * 3) << 8) | (255 - pos * 3);
return matrix.Color(0, (uint32_t)(pos * 3), (255 - pos * 3));
} else {
pos -= 170;
// return ((uint32_t)(pos * 3) << 16) | ((uint32_t)(255 - pos * 3) << 8) | (0);
return matrix.Color((uint16_t)(pos * 3), (uint32_t)(255 - pos * 3), 0);
}
}