simple joystick interface for the teensy 2

mame/joystick/joystick.ino

@@ -0,0 +1,65 @@
+/** \file
+ * MAME joystick built with a teensy 2.
+ *
+ * (Should redo this with a teensy3, maybe built it into the v.st board)
+ *
+ * Arrow keys
+ * 5 
+ * 1
+ */
+
+#define JOY_UP 2
+#define JOY_DOWN 4
+#define JOY_LEFT 3
+#define JOY_RIGHT 1
+#define FIRE 5
+#define START 20
+#define COIN 21
+
+void setup()
+{
+	pinMode(JOY_UP, INPUT_PULLUP);
+	pinMode(JOY_DOWN, INPUT_PULLUP);
+	pinMode(JOY_LEFT, INPUT_PULLUP);
+	pinMode(JOY_RIGHT, INPUT_PULLUP);
+	pinMode(FIRE, INPUT_PULLUP);
+	pinMode(START, INPUT_PULLUP);
+	pinMode(COIN, INPUT_PULLUP);
+}
+
+void loop()
+{
+	int modifiers = 0;
+	if (!digitalRead(JOY_UP))
+		modifiers |= MODIFIERKEY_ALT;
+	if (!digitalRead(FIRE))
+		modifiers |= MODIFIERKEY_CTRL;
+	Keyboard.set_modifier(modifiers);
+
+	if (!digitalRead(JOY_DOWN))
+		Keyboard.set_key1(KEY_SPACE);
+	else
+		Keyboard.set_key1(0);
+
+	if (!digitalRead(JOY_LEFT))
+		Keyboard.set_key2(KEY_LEFT);
+	else
+		Keyboard.set_key2(0);
+
+	if (!digitalRead(JOY_RIGHT))
+		Keyboard.set_key3(KEY_RIGHT);
+	else
+		Keyboard.set_key3(0);
+
+	if (!digitalRead(START))
+		Keyboard.set_key4(KEY_1);
+	else
+		Keyboard.set_key4(0);
+
+	if (!digitalRead(COIN))
+		Keyboard.set_key5(KEY_5);
+	else
+		Keyboard.set_key5(0);
+
+	Keyboard.send_now();
+}