Types of game buttons.
#include <screen/screen.h>
enum {
SCREEN_A_GAME_BUTTON = (1 << 0)
SCREEN_B_GAME_BUTTON = (1 << 1)
SCREEN_C_GAME_BUTTON = (1 << 2)
SCREEN_X_GAME_BUTTON = (1 << 3)
SCREEN_Y_GAME_BUTTON = (1 << 4)
SCREEN_Z_GAME_BUTTON = (1 << 5)
SCREEN_MENU1_GAME_BUTTON = (1 << 6)
SCREEN_MENU2_GAME_BUTTON = (1 << 7)
SCREEN_MENU3_GAME_BUTTON = (1 << 8)
SCREEN_MENU4_GAME_BUTTON = (1 << 9)
SCREEN_L1_GAME_BUTTON = (1 << 10)
SCREEN_L2_GAME_BUTTON = (1 << 11)
SCREEN_L3_GAME_BUTTON = (1 << 12)
SCREEN_R1_GAME_BUTTON = (1 << 13)
SCREEN_R2_GAME_BUTTON = (1 << 14)
SCREEN_R3_GAME_BUTTON = (1 << 15)
SCREEN_DPAD_UP_GAME_BUTTON = (1 << 16)
SCREEN_DPAD_DOWN_GAME_BUTTON = (1 << 17)
SCREEN_DPAD_LEFT_GAME_BUTTON = (1 << 18)
SCREEN_DPAD_RIGHT_GAME_BUTTON = (1 << 19)
};
These enumerator values are used as constants to map buttons from different controllers to a common game control layout. Typically, you create a structure to represent your game controller and map the buttons to constants in this enumeration.