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@chrisboulton
Created August 5, 2015 18:09
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neomatrix-demo.ino
#include <Adafruit_GFX.h>
#include <Adafruit_NeoMatrix.h>
#include <Adafruit_NeoPixel.h>
#ifndef PSTR
#define PSTR // Make Arduino Due happy
#endif
#define PIN 6
Adafruit_NeoMatrix matrix = Adafruit_NeoMatrix(1, 294, PIN,
NEO_MATRIX_TOP + NEO_MATRIX_RIGHT +
NEO_MATRIX_COLUMNS + NEO_MATRIX_PROGRESSIVE,
NEO_GRB + NEO_KHZ800);
void setup() {
matrix.begin();
matrix.setTextWrap(false);
matrix.setBrightness(40);
}
void loop() {
// Some example procedures showing how to display to the pixels:
colorWipe(matrix.Color(255, 0, 0), 20); // Red
colorWipe(matrix.Color(0, 255, 0), 20); // Green
colorWipe(matrix.Color(0, 0, 255), 20); // Blue
// Send a theater pixel chase in...
theaterChase(matrix.Color(127, 127, 127), 50); // White
theaterChase(matrix.Color(127, 0, 0), 50); // Red
theaterChase(matrix.Color( 0, 0, 127), 50); // Blue
rainbow(20);
rainbowCycle(20);
theaterChaseRainbow(50);
}
// Fill the dots one after the other with a color
void colorWipe(uint32_t c, uint8_t wait) {
for(uint16_t i=0; i<294; i++) {
matrix.drawPixel(0, i, c);
matrix.show();
delay(wait);
}
}
void rainbow(uint8_t wait) {
uint16_t i, j;
for(j=0; j<256; j++) {
for(i=0; i<294; i++) {
matrix.drawPixel(0, i, Wheel((i+j) & 255));
}
matrix.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< 294; i++) {
matrix.drawPixel(0, i, Wheel(((i * 256 / 294) + j) & 255));
}
matrix.show();
delay(wait);
}
}
//Theatre-style crawling lights.
void theaterChase(uint32_t c, uint8_t wait) {
for (int j=0; j<10; j++) { //do 10 cycles of chasing
for (int q=0; q < 3; q++) {
for (int i=0; i < 294; i=i+3) {
matrix.drawPixel(0, i+q, c); //turn every third pixel on
}
matrix.show();
delay(wait);
for (int i=0; i < 294; i=i+3) {
matrix.drawPixel(0, i+q, 0); //turn every third pixel off
}
}
}
}
//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 < 294; i=i+3) {
matrix.drawPixel(0, i+q, Wheel( (i+j) % 255)); //turn every third pixel on
}
matrix.show();
delay(wait);
for (int i=0; i < 294; i=i+3) {
matrix.drawPixel(0, 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 matrix.Color(255 - WheelPos * 3, 0, WheelPos * 3);
} else if(WheelPos < 170) {
WheelPos -= 85;
return matrix.Color(0, WheelPos * 3, 255 - WheelPos * 3);
} else {
WheelPos -= 170;
return matrix.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
}
}
@marcmerlin
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This is the 1D code (i.e. not neomatrix) from adafruit. If anyone would like 2D neomatrix demo code, you can go here: http://marc.merlins.org/perso/arduino/post_2017-04-24_Adafruit-GFX-on-NeoMatrix-and-RGB-Matrix-Panel-Demo.html

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