Cylon.ino

 
#include <FastLED.h>
 
// How many leds in your strip?
#define NUM_LEDS 64 
 
// For led chips like Neopixels, which have a data line, ground, and power, you just
// need to define DATA_PIN.  For led chipsets that are SPI based (four wires - data, clock,
// ground, and power), like the LPD8806, define both DATA_PIN and CLOCK_PIN
#define DATA_PIN 2
#define CLOCK_PIN 13
 
// Define the array of leds
CRGB leds[NUM_LEDS];
 
void setup() { 
    Serial.begin(57600);
    Serial.println("resetting");
    FastLED.addLeds<WS2812,DATA_PIN,RGB>(leds,NUM_LEDS);
    FastLED.setBrightness(84);
}
 
void fadeall() { for(int i = 0; i < NUM_LEDS; i++) { leds[i].nscale8(250); } }
 
void loop() { 
    static uint8_t hue = 0;
    Serial.print("x");
    // First slide the led in one direction
    for(int i = 0; i < NUM_LEDS; i++) {
        // Set the i'th led to red
        leds[i] = CHSV(hue++, 255, 255);
        // Show the leds
        FastLED.show(); 
        // now that we've shown the leds, reset the i'th led to black
        // leds[i] = CRGB::Black;
        fadeall();
        // Wait a little bit before we loop around and do it again
        delay(10);
    }
    Serial.print("x");
 
    // Now go in the other direction.  
    for(int i = (NUM_LEDS)-1; i >= 0; i--) {
        // Set the i'th led to red
        leds[i] = CHSV(hue++, 255, 255);
        // Show the leds
        FastLED.show();
        // now that we've shown the leds, reset the i'th led to black
        // leds[i] = CRGB::Black;
        fadeall();
        // Wait a little bit before we loop around and do it again
        delay(10);
    }
}