Googled 'arduino, bit2btn' ... just turned up a goldmine:
once again using:
"
Joystick_ Joystick(
JOYSTICK_DEFAULT_REPORT_ID, JOYSTICK_TYPE_GAMEPAD, 21, 1, // 21 buttons, 1 hatswitch
false, false, false, false, false, false,
false, false, false, false, false);
"
/*
* Code by Insert...