Update TestConsole to use GP2 on RP2040-based devices

docs/start.rst

@@ -88,6 +88,7 @@ When the test console loads up, you will be greeted with the following:
 
     Using 1-based indexing.
     Button Clicks = 0.25s
+    Test Button = board.D2
     Enter command (? for list)
     :
 
@@ -157,13 +158,13 @@ in-game.
 joystick events** it will not capture events generated from the test console
 because your serial terminal will be in-focus while you are typing in it.
 For cases like these, the test console provides a single digital input - by
-default on pin ``D2`` - which will repeat the last typed command when activated.
-You can either hook up an actual button, or just short ``D2`` to ground to
-trigger commands as needed.  In the game example above, you would enter the
-desired command in the test console and press enter, then switch to the game
-and use the button input to trigger that command while the game is in focus.
-If needed, the button pin can also be changed when the test console is started
-as follows:
+default on pin ``D2`` (``GP2`` on RP2040-based devices) - which will repeat
+the last typed command when activated. You can either hook up an actual
+button, or just short the pin to ground to trigger commands as needed.  In
+the game example above, you would enter the desired command in the test
+console and press enter, then switch to the game and use the button input to
+trigger that command while the game is in focus. If needed, the button pin
+can also be changed when the test console is started as follows:
 
 .. code-block:: text
 

joystick_xl/tools.py

@@ -101,7 +101,13 @@ def TestHats(js: Joystick, pace: float = 0.25, quiet: bool = False) -> None:
 
 
 def TestConsole(button_pin: Pin = None):
-    """Run JoystickXL's REPL-based, built-in test console."""
+    """
+    Run JoystickXL's REPL-based, built-in test console.
+
+    :param button_pin: Specify the pin to use as TestConsole's test button.  Defaults
+        to ``board.D2`` (``board.GP2`` on RP2040-based devices).
+    :type button_pin: microcontroller.Pin, optional
+    """
     INVALID_OPERATION = "> Invalid operation."
 
     js = Joystick()
@@ -133,7 +139,12 @@ def MoveAxis(axis: int, stop: int, step: int) -> None:
     try:
         # Attempt to configure a test button
         if button_pin is None:
-            pin = board.D2
+            try:
+                # for most CircuitPython boards
+                pin = board.D2
+            except AttributeError:
+                # for RP2040-based boards
+                pin = board.GP2
         else:
             pin = button_pin
         button = digitalio.DigitalInOut(pin)