Added arduino libs

libraries/EnableInterrupt/examples/SimpleDueZero/SimpleDueZero.ino

@@ -0,0 +1,47 @@
+// EnableInterrupt Simple example sketch. Demonstrates operation on a single pin of your choice.
+// See https://github.com/GreyGnome/EnableInterrupt and the README.md for more information.
+#include <EnableInterrupt.h>
+
+// Modify this at your leisure. Refer to https://github.com/GreyGnome/EnableInterrupt/wiki/Usage#Summary
+#define ARDUINOPIN 10
+
+volatile uint16_t interruptCount=0; // The count will go back to 0 after hitting 65535.
+
+void interruptFunction() {
+  interruptCount++;
+}
+
+void setup() {
+  Serial.begin(115200);
+  pinMode(ARDUINOPIN, INPUT_PULLUP);  // See http://arduino.cc/en/Tutorial/DigitalPins
+  enableInterrupt(ARDUINOPIN, interruptFunction, CHANGE);
+}
+
+// In the loop we just display interruptCount. The value is updated by the interrupt routine.
+void loop() {
+  Serial.println("---------------------------------------");
+  delay(1000);
+  Serial.print("Pin was interrupted: ");
+  Serial.print(interruptCount, DEC);
+  Serial.println(" times so far.");
+}
+
+//////////////////////////////////////////////////////////////////////////////////////////
+////////////////////////////////////// GORY DETAILS //////////////////////////////////////
+
+/* The EnableInterrupt library was designed to present a single API for interrupts to all
+ * the Arduino processors. The problems have traditionally been caused by the varying and
+ * complicated pin interrupt schemes of the ATmega line of processors. The SAM processors
+ * present a more straightforward interrupt design. They already do what the EnableInterrupt
+ * library is trying to present: To enable an interrupt on a pin, simply set up that pin
+ * with the type of interrupt you want, no conversion to an "Interrupt Number" [see the
+ * attachInterrupt() docs].
+ *
+ * This means that the EnableInterrupt library's work on the Due and Zero is trivial: if
+ * called on those platforms, we simply create a macro that converts enableInterrupt() and
+ * disableInterrupt() to attachInterrupt()/detachInterrupt().
+ *
+ * Since that's all it does, the ONLY advantage the EnableInterrupt library offers is as
+ * a consistent API across the chip families. If you are not interested in this then don't use
+ * the EnableInterrupt library.
+ */