ESP8266-RGB-Autocycle: Added autocycler for ESP8266 LED controller

ESP8266-RGB-Autocycle/ESP8266-RGB-Autocycle.ino

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+/********************************************************************************
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015 Nis Wechselberg
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ ********************************************************************************/
+
+/********************************************************************************
+ * ESP8266-RGB-Autocycle
+ * Cycles an RGB LED Ribbon through all possible colors.
+ ********************************************************************************/
+
+// Configuration
+const int redPin    = 12;
+const int greenPin  = 13;
+const int bluePin   = 14;
+
+void setup() {
+  // Start off with the LED off.
+  setColourRgb(0,0,0);
+}
+
+void loop() {
+  // Store pwm value for each color channel
+  unsigned int rgbColour[3];
+
+  // Start off with red
+  rgbColour[0] = 1023;
+  rgbColour[1] = 0;
+  rgbColour[2] = 0;  
+
+  // Choose the colours to increment and decrement.
+  for (int decColour = 0; decColour < 3; decColour += 1) {
+    int incColour = decColour == 2 ? 0 : decColour + 1;
+
+    // cross-fade the two colours.
+    for(int i = 0; i < 1023; i += 1) {
+      rgbColour[decColour] -= 1;
+      rgbColour[incColour] += 1;
+      
+      setColourRgb(rgbColour[0], rgbColour[1], rgbColour[2]);
+      delay(5);
+    }
+  }
+}
+
+// Helper function to set the RGB value
+void setColourRgb(unsigned int red, unsigned int green, unsigned int blue) {
+  analogWrite(redPin, red);
+  analogWrite(greenPin, green);
+  analogWrite(bluePin, blue);
+ }
+