Initial Commit

Java/Processing/processing-3.3.6/modes/java/libraries/io/examples/Interrupt/Interrupt.pde

@@ -0,0 +1,25 @@
+import processing.io.*;
+color bgcolor = 0;
+
+// GPIO numbers refer to different phyiscal pins on various boards
+// On the Raspberry Pi GPIO 4 is physical pin 7 on the header
+// see setup.png in the sketch folder for wiring details
+
+void setup() {
+  GPIO.pinMode(4, GPIO.INPUT);
+  GPIO.attachInterrupt(4, this, "pinEvent", GPIO.RISING);
+}
+
+void draw() {
+  background(bgcolor);
+}
+
+// this function will be called whenever GPIO 4 is brought from LOW to HIGH
+void pinEvent(int pin) {
+  println("Received interrupt");
+  if (bgcolor == 0) {
+    bgcolor = color(255);
+  } else {
+    bgcolor = color(0);
+  }
+}