1 /*
2 * libtilemcore - Graphing calculator emulation library
3 *
4 * Copyright (C) 2009 Benjamin Moody
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public License
8 * as published by the Free Software Foundation; either version 2.1 of
9 * the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see
18 * <http://www.gnu.org/licenses/>.
19 */
20
21 #ifdef HAVE_CONFIG_H
22 # include <config.h>
23 #endif
24
25 #include <stdio.h>
26 #include "tilem.h"
27 #include "scancodes.h"
28
tilem_keypad_reset(TilemCalc * calc)29 void tilem_keypad_reset(TilemCalc* calc)
30 {
31 int i;
32
33 calc->keypad.group = 0xff;
34 calc->keypad.onkeydown = 0;
35 calc->keypad.onkeyint = 0;
36 for (i = 0; i < 8; i++)
37 calc->keypad.keysdown[i] = 0;
38 }
39
tilem_keypad_set_group(TilemCalc * calc,byte group)40 void tilem_keypad_set_group(TilemCalc* calc, byte group)
41 {
42 calc->keypad.group = group;
43 }
44
tilem_keypad_read_keys(TilemCalc * calc)45 byte tilem_keypad_read_keys(TilemCalc* calc)
46 {
47 int i;
48 byte keys, old;
49
50 keys = 0;
51 for (i = 0; i < 8; i++) {
52 if (!(calc->keypad.group & (1 << i)))
53 keys |= calc->keypad.keysdown[i];
54 }
55
56 do {
57 old = keys;
58 for (i = 0; i < 8; i++) {
59 if (keys & calc->keypad.keysdown[i])
60 keys |= calc->keypad.keysdown[i];
61 }
62 } while (keys != old);
63
64 return ~keys;
65 }
66
tilem_keypad_press_key(TilemCalc * calc,int scancode)67 void tilem_keypad_press_key(TilemCalc* calc, int scancode)
68 {
69 if (scancode == TILEM_KEY_ON) {
70 if (!calc->keypad.onkeydown && calc->keypad.onkeyint)
71 calc->z80.interrupts |= TILEM_INTERRUPT_ON_KEY;
72 calc->keypad.onkeydown = 1;
73 }
74 else if (scancode > 0 && scancode < 65) {
75 scancode--;
76 calc->keypad.keysdown[scancode / 8] |= (1 << (scancode % 8));
77 }
78 }
79
tilem_keypad_release_key(TilemCalc * calc,int scancode)80 void tilem_keypad_release_key(TilemCalc* calc, int scancode)
81 {
82 if (scancode == TILEM_KEY_ON) {
83 if (calc->keypad.onkeydown && calc->keypad.onkeyint)
84 calc->z80.interrupts |= TILEM_INTERRUPT_ON_KEY;
85 calc->keypad.onkeydown = 0;
86 }
87 else if (scancode > 0 && scancode < 65) {
88 scancode--;
89 calc->keypad.keysdown[scancode / 8] &= ~(1 << (scancode % 8));
90 }
91 }
92