gbasys
annotate src/input.c @ 9:85f219fcdc82
merged
| author | John Tsiombikas <nuclear@member.fsf.org> |
|---|---|
| date | Sun, 22 Jun 2014 06:27:18 +0300 |
| parents | 047c61960005 72c6429ae953 |
| children |
| rev | line source |
|---|---|
| nuclear@0 | 1 /* |
| nuclear@7 | 2 gbasys - a gameboy advance hardware abstraction library |
| nuclear@7 | 3 Copyright (C) 2004-2014 John Tsiombikas <nuclear@member.fsf.org> |
| nuclear@0 | 4 |
| nuclear@7 | 5 This program is free software: you can redistribute it and/or modify |
| nuclear@0 | 6 it under the terms of the GNU General Public License as published by |
| nuclear@7 | 7 the Free Software Foundation, either version 3 of the License, or |
| nuclear@0 | 8 (at your option) any later version. |
| nuclear@0 | 9 |
| nuclear@0 | 10 This program is distributed in the hope that it will be useful, |
| nuclear@0 | 11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
| nuclear@0 | 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| nuclear@0 | 13 GNU General Public License for more details. |
| nuclear@0 | 14 |
| nuclear@0 | 15 You should have received a copy of the GNU General Public License |
| nuclear@7 | 16 along with this program. If not, see <http://www.gnu.org/licenses/>. |
| nuclear@0 | 17 */ |
| nuclear@0 | 18 #include "input.h" |
| nuclear@0 | 19 |
| nuclear@8 | 20 #define REG_KEYSTATE (*(unsigned short*)0x4000130) |
| nuclear@8 | 21 #define REG_KEYCTL (*(unsigned short*)0x4000132) |
| nuclear@0 | 22 |
| nuclear@0 | 23 int get_key_state(int key) { |
| nuclear@8 | 24 int res; |
| nuclear@8 | 25 unsigned short prev_mask; |
| nuclear@8 | 26 |
| nuclear@8 | 27 prev_mask = REG_KEYCTL; |
| nuclear@8 | 28 disable_key_interrupts(key); |
| nuclear@8 | 29 |
| nuclear@8 | 30 res = ~REG_KEYSTATE & key; |
| nuclear@8 | 31 REG_KEYCTL = prev_mask; |
| nuclear@8 | 32 return res; |
| nuclear@0 | 33 } |
| nuclear@0 | 34 |
| nuclear@0 | 35 void enable_key_interrupts(int keys) { |
| nuclear@8 | 36 REG_KEYCTL |= (1 << 14) | keys; |
| nuclear@0 | 37 } |
| nuclear@0 | 38 |
| nuclear@0 | 39 void disable_key_interrupts(int keys) { |
| nuclear@0 | 40 if(keys == KEY_ALL) keys |= (1 << 14); |
| nuclear@8 | 41 REG_KEYCTL ^= keys; |
| nuclear@0 | 42 } |