Added Arduino sketch

CaseLights.ino

@@ -0,0 +1,119 @@
+/*
+ * CaseLights
+ * 
+ * Arduino RGB LED Controller with Serial interface.
+ * 
+ * Two commands are supported, ending with a new-line:
+ * 
+ *     RGB r g b
+ *     
+ *     UV s
+ * 
+ * The RGB command sets the PWM output for the LEDs.
+ * The UV command turns the UV lights on or off (s can be 0 or 1).
+ */
+
+//#define DEBUG
+
+static int redPin = 10;
+static int greenPin = 9;
+static int bluePin = 11;
+static int uvPin = 13;
+
+void setup() {
+  Serial.begin(115200);
+  
+  pinMode(redPin, OUTPUT);
+  pinMode(greenPin, OUTPUT);
+  pinMode(bluePin, OUTPUT);
+  pinMode(uvPin, OUTPUT);
+  
+  analogWrite(redPin, 0);
+  analogWrite(greenPin, 0);
+  analogWrite(bluePin, 0);
+  digitalWrite(uvPin, LOW);
+
+#ifdef DEBUG
+  Serial.println("CaseLights initialized");
+#endif
+}
+
+void loop() {
+  if (Serial.available() > 0) {
+    int c = Serial.read();
+    if (c == 'R') {
+      c = Serial.read();
+      if (c == 'G') {
+        c = Serial.read();
+        if (c == 'B') {
+          int r = Serial.parseInt();
+          int g = Serial.parseInt();
+          int b = Serial.parseInt();
+          analogWrite(redPin, r);
+          analogWrite(greenPin, g);
+          analogWrite(bluePin, b);
+#ifdef DEBUG
+          Serial.print("RGB set ");
+          Serial.print(r);
+          Serial.print(' ');
+          Serial.print(g);
+          Serial.print(' ');
+          Serial.print(b);
+          Serial.println();
+#endif
+        } else {
+#ifdef DEBUG
+          Serial.print("Invalid character after G: ");
+          Serial.print(c);
+          Serial.println();
+#endif
+        }
+      } else {
+#ifdef DEBUG
+        Serial.print("Invalid character after R: ");
+        Serial.print(c);
+        Serial.println();
+#endif
+      }
+    } else if (c == 'U') {
+      c = Serial.read();
+      if (c == 'V') {
+        c = Serial.parseInt();
+        if (c == 0) {
+          digitalWrite(uvPin, LOW);
+#ifdef DEBUG
+          Serial.println("UV off");
+#endif
+        } else if (c == 1) {
+          digitalWrite(uvPin, HIGH);
+#ifdef DEBUG
+          Serial.println("UV on");
+#endif
+        } else {
+#ifdef DEBUG
+          Serial.print("Invalid character for UV: ");
+          Serial.print(c);
+          Serial.println();
+#endif
+        }
+      } else {
+#ifdef DEBUG
+        Serial.print("Invalid character after U: ");
+        Serial.print(c);
+        Serial.println();
+#endif
+      }
+    } else if ((c == '\n') || (c == '\r')) {
+#ifdef DEBUG
+      Serial.println("Skipping new-line or carriage-return...");
+#endif
+    } else {
+#ifdef DEBUG
+      Serial.print("Invalid character: ");
+      Serial.print(c);
+      Serial.println();
+#endif
+    }
+  }
+}
+