nuclear@0: /*
nuclear@3: Copyright 2004-2012 John Tsiombikas <nuclear@member.fsf.org>
nuclear@0: 
nuclear@3: This file is part of gbasys, a library for GameBoy Advance development.
nuclear@0: 
nuclear@0: This program is free software; you can redistribute it and/or modify
nuclear@0: it under the terms of the GNU General Public License as published by
nuclear@0: the Free Software Foundation; either version 2 of the License, or
nuclear@0: (at your option) any later version.
nuclear@0: 
nuclear@0: This program is distributed in the hope that it will be useful,
nuclear@0: but WITHOUT ANY WARRANTY; without even the implied warranty of
nuclear@0: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
nuclear@0: GNU General Public License for more details.
nuclear@0: 
nuclear@0: You should have received a copy of the GNU General Public License
nuclear@0: along with this program; if not, write to the Free Software
nuclear@0: Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
nuclear@0: */
nuclear@0: 
nuclear@0: #include "input.h"
nuclear@0: 
nuclear@8: #define REG_KEYSTATE	(*(unsigned short*)0x4000130)
nuclear@8: #define REG_KEYCTL		(*(unsigned short*)0x4000132)
nuclear@0: 
nuclear@0: int get_key_state(int key) {
nuclear@8: 	int res;
nuclear@8: 	unsigned short prev_mask;
nuclear@8: 
nuclear@8: 	prev_mask = REG_KEYCTL;
nuclear@8: 	disable_key_interrupts(key);
nuclear@8: 
nuclear@8: 	res = ~REG_KEYSTATE & key;
nuclear@8: 	REG_KEYCTL = prev_mask;
nuclear@8: 	return res;
nuclear@0: }
nuclear@0: 
nuclear@0: void enable_key_interrupts(int keys) {
nuclear@8: 	REG_KEYCTL |= (1 << 14) | keys;
nuclear@0: }
nuclear@0: 
nuclear@0: void disable_key_interrupts(int keys) {
nuclear@0: 	if(keys == KEY_ALL) keys |= (1 << 14);
nuclear@8: 	REG_KEYCTL ^= keys;
nuclear@0: }