1 /*

2 Copyright 2004 John Tsiombikas <nuclear@siggraph.org>

3

4 This file is part of libgba, a library for GameBoy Advance development.

5

6 This program is free software; you can redistribute it and/or modify

7 it under the terms of the GNU General Public License as published by

8 the Free Software Foundation; either version 2 of the License, or

9 (at your option) any later version.

10

11 This program is distributed in the hope that it will be useful,

12 but WITHOUT ANY WARRANTY; without even the implied warranty of

13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

14 GNU General Public License for more details.

15

16 You should have received a copy of the GNU General Public License

17 along with this program; if not, write to the Free Software

18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

19 */

20

21 #include "input.h"

22

23 volatile unsigned short *reg_key_state = (unsigned short*)0x4000130;

24 volatile unsigned short *reg_key_cntl = (unsigned short*)0x4000132;

25

26 int get_key_state(int key) {

27 return ~(*reg_key_state) & key;

28 }

29

30 void enable_key_interrupts(int keys) {

31 *reg_key_cntl |= (1 << 14) | keys;

32 }

33

34 void disable_key_interrupts(int keys) {

35 if(keys == KEY_ALL) keys |= (1 << 14);

36 *reg_key_cntl ^= keys;

37 }