Add FastLED example

examples/FastLED_Cylon/FastLED_Cylon.ino

+// FastLED Cylon Example, using Non-Blocking WS2812Serial
+
+#include <WS2812Serial.h>
+#define USE_WS2812SERIAL
+#include <FastLED.h>
+
+// How many leds in your strip?
+#define NUM_LEDS 64
+
+// Usable pins:
+//   Teensy LC:   1, 4, 5, 24
+//   Teensy 3.2:  1, 5, 8, 10, 20, 31
+//   Teensy 3.5:  1, 5, 8, 10, 20, 26, 32, 33, 48
+//   Teensy 3.6:  1, 5, 8, 10, 20, 26, 32, 33
+#define DATA_PIN 1
+
+// Define the array of leds
+CRGB leds[NUM_LEDS];
+
+void setup() {
+	Serial.begin(57600);
+	Serial.println("resetting");
+	LEDS.addLeds<WS2812SERIAL,DATA_PIN,RGB>(leds,NUM_LEDS);
+	LEDS.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(20);
+	}
+	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(20);
+	}
+}