Add new (stubbed) API that simplifies use of the joystick library.

Joystick.cpp

@@ -19,6 +19,18 @@ void Joystick::Init() {
   if (_debug) Serial.println("DEBUG: Joystick library initialized.");
 }
 
+void Joystick::AddButton(uint8_t pin, ButtonType type) {
+  // stub
+}
+
+void Joystick::AddAxis(uint8_t pin) {
+  // stub
+}
+
+void Joystick::Update() {
+  // stub
+}
+
 void Joystick::SetAxis(uint8_t axis, int16_t value) {
   if (axis >= JOYSTICK_NUM_AXES) return;
   _joyReport.axis[axis] = value;

Joystick.h

@@ -4,13 +4,22 @@
 #include <Arduino.h>
 
 // If you're using the arduino-big-joystick firmware, these numbers can't be
-// changed. If you're writing your own Report Descriptor, tune these to match.
+// changed. If you're writing your own Report Descriptor, tune these to match by
-// TODO: Pass these in to the constructor, with the same caveats. Shouldn't need
+// defining them *before* you include Joystick.h.
-// to edit the header file to make something work in a library. :(
+#ifndef JOYSTICK_NUM_AXES
 #define JOYSTICK_NUM_AXES 8
+#endif
+#ifndef JOYSTICK_NUM_BUTTONS
 #define JOYSTICK_NUM_BUTTONS 40
+#endif
 #define JOYSTICK_NUM_BYTES (JOYSTICK_NUM_BUTTONS+7)/8
 
+enum ButtonType {
+  BUTTON_MAINTAINED,
+  BUTTON_PULSED,
+  BUTTON_PULSED_DOUBLE_ACTION
+};
+
 typedef struct JoyReport {
   int16_t axis[JOYSTICK_NUM_AXES];
   uint8_t button[JOYSTICK_NUM_BYTES];
@@ -20,18 +29,24 @@ class Joystick {
   public:
     Joystick(bool debug=false);
     void Init();
+    void Update();
     
+    void AddButton(uint8_t pin, ButtonType type);
+    void AddAxis(uint8_t pin);
+    
+    // These functions are deprecated and may become private in a future
+    // version. Prefer the above API instead.
     void SetAxis(uint8_t axis, int16_t value);
-
     void PressButton(uint8_t button);
     void ReleaseButton(uint8_t button);
     void ReleaseAllButtons();
-
-    // This actually sends the commands. You *must* call this for the
-    // joystick to do anything!
     void Write();
 
   private:
+    struct {
+      
+    } _buttons[JOYSTICK_NUM_BUTTONS];
+    uint8_t _num_buttons;
     JoyReport _joyReport;
     bool _debug;
 };