92 lines
2.2 KiB
C
92 lines
2.2 KiB
C
/*
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* libtilemcore - Graphing calculator emulation library
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*
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* Copyright (C) 2009 Benjamin Moody
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful, but
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* 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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see
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* <http://www.gnu.org/licenses/>.
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <stdio.h>
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#include "tilem.h"
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#include "scancodes.h"
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void tilem_keypad_reset(TilemCalc* calc)
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{
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int i;
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calc->keypad.group = 0xff;
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calc->keypad.onkeydown = 0;
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calc->keypad.onkeyint = 0;
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for (i = 0; i < 8; i++)
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calc->keypad.keysdown[i] = 0;
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}
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void tilem_keypad_set_group(TilemCalc* calc, byte group)
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{
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calc->keypad.group = group;
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}
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byte tilem_keypad_read_keys(TilemCalc* calc)
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{
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int i;
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byte keys, old;
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keys = 0;
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for (i = 0; i < 8; i++) {
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if (!(calc->keypad.group & (1 << i)))
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keys |= calc->keypad.keysdown[i];
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}
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do {
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old = keys;
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for (i = 0; i < 8; i++) {
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if (keys & calc->keypad.keysdown[i])
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keys |= calc->keypad.keysdown[i];
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}
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} while (keys != old);
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return ~keys;
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}
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void tilem_keypad_press_key(TilemCalc* calc, int scancode)
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{
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if (scancode == TILEM_KEY_ON) {
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if (!calc->keypad.onkeydown && calc->keypad.onkeyint)
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calc->z80.interrupts |= TILEM_INTERRUPT_ON_KEY;
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calc->keypad.onkeydown = 1;
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}
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else if (scancode > 0 && scancode < 65) {
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scancode--;
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calc->keypad.keysdown[scancode / 8] |= (1 << (scancode % 8));
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}
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}
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void tilem_keypad_release_key(TilemCalc* calc, int scancode)
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{
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if (scancode == TILEM_KEY_ON) {
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if (calc->keypad.onkeydown && calc->keypad.onkeyint)
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calc->z80.interrupts |= TILEM_INTERRUPT_ON_KEY;
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calc->keypad.onkeydown = 0;
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}
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else if (scancode > 0 && scancode < 65) {
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scancode--;
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calc->keypad.keysdown[scancode / 8] &= ~(1 << (scancode % 8));
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}
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}
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