gbasys

view src/input.c @ 0:875ef6085efc

gbasys mercurial repository
author John Tsiombikas <nuclear@member.fsf.org>
date Sun, 04 Mar 2012 04:04:25 +0200
parents
children 06726f0b8cd3
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1 /*
2 Copyright 2004 John Tsiombikas <nuclear@siggraph.org>
4 This file is part of libgba, a library for GameBoy Advance development.
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.
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.
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 */
21 #include "input.h"
23 volatile unsigned short *reg_key_state = (unsigned short*)0x4000130;
24 volatile unsigned short *reg_key_cntl = (unsigned short*)0x4000132;
26 int get_key_state(int key) {
27 return ~(*reg_key_state) & key;
28 }
30 void enable_key_interrupts(int keys) {
31 *reg_key_cntl |= (1 << 14) | keys;
32 }
34 void disable_key_interrupts(int keys) {
35 if(keys == KEY_ALL) keys |= (1 << 14);
36 *reg_key_cntl ^= keys;
37 }