Sample code for using a breadboard Arduino to drive WS2812B LED strip with Adafruit NeoPixel library
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#include <Adafruit_NeoPixel.h> | |
// Sample code for using a breadboard Arduino to drive WS2812B LED strip with Adafruit NeoPixel library | |
// I got mine on e-bay: | |
// http://www.ebay.com/itm/181268207260?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649 | |
// Note - colors for data and ground vary | |
// I used a 16MHZ Crystal Oscilator | |
#define PIN 8 // connect the Data In pin | |
// Parameter 1 = number of pixels in strip - I used 12 | |
// Parameter 2 = pin number (most are valid) | |
// Parameter 3 = pixel type flags, add together as needed: | |
// NEO_GRB Pixels are wired for GRB bitstream | |
// NEO_KHZ800 800 KHz bitstream (e.g. High Density LED strip) | |
Adafruit_NeoPixel strip = Adafruit_NeoPixel(12, PIN, NEO_GRB + NEO_KHZ800); | |
void setup() { | |
strip.begin(); | |
strip.show(); // Initialize all pixels to 'off' | |
} | |
void loop() { | |
// Some example procedures showing how to display to the pixels: | |
colorWipe(strip.Color(255, 0, 0), 50); // Red | |
colorWipe(strip.Color(0, 255, 0), 50); // Green | |
colorWipe(strip.Color(0, 0, 255), 50); // Blue | |
rainbow(20); | |
rainbowCycle(20); | |
} | |
// Fill the dots one after the other with a color | |
void colorWipe(uint32_t c, uint8_t wait) { | |
for(uint16_t i=0; i<strip.numPixels(); i++) { | |
strip.setPixelColor(i, c); | |
strip.show(); | |
delay(wait); | |
} | |
} | |
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); | |
} | |
} | |
// 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); | |
} | |
} |
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