75 lines
1.9 KiB
C
75 lines
1.9 KiB
C
/* gameplaySP
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*
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* Copyright (C) 2006 Exophase <exophase@gmail.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "common.h"
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static u32 old_key = 0;
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static retro_input_state_t input_state_cb;
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void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; }
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static void trigger_key(u32 key)
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{
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u32 p1_cnt = io_registers[REG_P1CNT];
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if((p1_cnt >> 14) & 0x01)
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{
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u32 key_intersection = (p1_cnt & key) & 0x3FF;
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if(p1_cnt >> 15)
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{
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if(key_intersection == (p1_cnt & 0x3FF))
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raise_interrupt(IRQ_KEYPAD);
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}
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else
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{
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if(key_intersection)
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raise_interrupt(IRQ_KEYPAD);
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}
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}
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}
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u32 update_input(void)
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{
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unsigned i;
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uint32_t new_key = 0;
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if (!input_state_cb)
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return 0;
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for (i = 0; i < sizeof(btn_map) / sizeof(map); i++)
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new_key |= input_state_cb(0, RETRO_DEVICE_JOYPAD, 0, btn_map[i].retropad) ? btn_map[i].gba : 0;
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if ((new_key | old_key) != old_key)
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trigger_key(new_key);
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old_key = new_key;
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io_registers[REG_P1] = (~old_key) & 0x3FF;
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return 0;
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}
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#define input_savestate_builder(type) \
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void input_##type##_savestate(void) \
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{ \
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state_mem_##type##_variable(old_key); \
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}
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input_savestate_builder(read)
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input_savestate_builder(write)
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