Added D-Pad support

ps2-arduino.ino

@@ -169,6 +169,40 @@ void loop() {
     XInput.release(BUTTON_R3);
   }
 
+  // D-Pad
+  // D-Left
+  if (ps2x.ButtonPressed(PSB_PAD_LEFT)) {
+    XInput.press(DPAD_LEFT);
+  }
+
+  if (ps2x.ButtonReleased(PSB_PAD_LEFT)) {
+    XInput.release(DPAD_LEFT);
+  }
+  // D-Right
+  if (ps2x.ButtonPressed(PSB_PAD_RIGHT)) {
+    XInput.press(DPAD_RIGHT);
+  }
+
+  if (ps2x.ButtonReleased(PSB_PAD_RIGHT)) {
+    XInput.release(DPAD_RIGHT);
+  }
+  // D-Up
+  if (ps2x.ButtonPressed(PSB_PAD_UP)) {
+    XInput.press(DPAD_UP);
+  }
+
+  if (ps2x.ButtonReleased(PSB_PAD_UP)) {
+    XInput.release(DPAD_UP);
+  }
+  // D-Down
+  if (ps2x.ButtonPressed(PSB_PAD_DOWN)) {
+    XInput.press(DPAD_DOWN);
+  }
+
+  if (ps2x.ButtonReleased(PSB_PAD_DOWN)) {
+    XInput.release(DPAD_DOWN);
+  }
+
   // Left stick
   XInput.setJoystick(JOY_LEFT, ps2x.Analog(PSS_LX), 255 - ps2x.Analog(PSS_LY));