gbasys
annotate src/input.c @ 8:047c61960005
- added bg2 matrix support
- changed some stupid const pointers to register addresses to hardcoded compile-time defines
| author | John Tsiombikas <nuclear@member.fsf.org> |
|---|---|
| date | Sun, 22 Jun 2014 06:26:11 +0300 |
| parents | 06726f0b8cd3 |
| children | 85f219fcdc82 |
| rev | line source |
|---|---|
| nuclear@0 | 1 /* |
| nuclear@3 | 2 Copyright 2004-2012 John Tsiombikas <nuclear@member.fsf.org> |
| nuclear@0 | 3 |
| nuclear@3 | 4 This file is part of gbasys, a library for GameBoy Advance development. |
| nuclear@0 | 5 |
| nuclear@0 | 6 This program is free software; you can redistribute it and/or modify |
| nuclear@0 | 7 it under the terms of the GNU General Public License as published by |
| nuclear@0 | 8 the Free Software Foundation; either version 2 of the License, or |
| nuclear@0 | 9 (at your option) any later version. |
| nuclear@0 | 10 |
| nuclear@0 | 11 This program is distributed in the hope that it will be useful, |
| nuclear@0 | 12 but WITHOUT ANY WARRANTY; without even the implied warranty of |
| nuclear@0 | 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| nuclear@0 | 14 GNU General Public License for more details. |
| nuclear@0 | 15 |
| nuclear@0 | 16 You should have received a copy of the GNU General Public License |
| nuclear@0 | 17 along with this program; if not, write to the Free Software |
| nuclear@0 | 18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| nuclear@0 | 19 */ |
| nuclear@0 | 20 |
| nuclear@0 | 21 #include "input.h" |
| nuclear@0 | 22 |
| nuclear@8 | 23 #define REG_KEYSTATE (*(unsigned short*)0x4000130) |
| nuclear@8 | 24 #define REG_KEYCTL (*(unsigned short*)0x4000132) |
| nuclear@0 | 25 |
| nuclear@0 | 26 int get_key_state(int key) { |
| nuclear@8 | 27 int res; |
| nuclear@8 | 28 unsigned short prev_mask; |
| nuclear@8 | 29 |
| nuclear@8 | 30 prev_mask = REG_KEYCTL; |
| nuclear@8 | 31 disable_key_interrupts(key); |
| nuclear@8 | 32 |
| nuclear@8 | 33 res = ~REG_KEYSTATE & key; |
| nuclear@8 | 34 REG_KEYCTL = prev_mask; |
| nuclear@8 | 35 return res; |
| nuclear@0 | 36 } |
| nuclear@0 | 37 |
| nuclear@0 | 38 void enable_key_interrupts(int keys) { |
| nuclear@8 | 39 REG_KEYCTL |= (1 << 14) | keys; |
| nuclear@0 | 40 } |
| nuclear@0 | 41 |
| nuclear@0 | 42 void disable_key_interrupts(int keys) { |
| nuclear@0 | 43 if(keys == KEY_ALL) keys |= (1 << 14); |
| nuclear@8 | 44 REG_KEYCTL ^= keys; |
| nuclear@0 | 45 } |