Add example sketch.

examples/switch_panel.ino

@@ -0,0 +1,55 @@
+// An example sketch using the joystick library.
+// In this example, we have 5 toggle switches that are configured
+// as double-action pulsed buttons - that is, whenever they are toggled, they
+// emit a short button press.
+
+#include <Joystick.h>
+
+bool debug = false;
+Joystick joystick(debug);
+
+// Number of connected buttons.
+int num_buttons = 5;
+// Last known state of each pin.
+int states[10] = {-1, -1, LOW, LOW, LOW, LOW, LOW, LOW, LOW, LOW};
+
+void parsePins(bool init=false) {
+  // Input: figure out which pins have changed.
+  bool something_pressed = false;
+  for (int i = 2; i < 2 + num_buttons; i++) {
+    int newstate = digitalRead(i);
+    if (newstate != states[i]) {
+      states[i] = newstate;
+      if (!init) {
+        joystick.PressButton(i-2);
+        something_pressed = true;
+      }
+    }
+  }
+
+  // Output: Actually press the appropriate buttons, wait, then clear them all.
+  if (something_pressed) {
+    joystick.Write();
+    joystick.ReleaseAllButtons();
+    joystick.Write();
+  }
+}
+
+void InitInputs() {
+  for (int i = 2; i < 2 + num_buttons; i++) {
+    pinMode(i, INPUT_PULLUP);
+  }
+  parsePins(true);
+}
+
+void setup() {
+  pinMode(13, OUTPUT);
+  digitalWrite(13, LOW);
+  joystick.Init();
+  InitInputs();
+}
+
+void loop() {
+  parsePins();
+  if (debug) delay(900);
+}