New keymap of PC98
[tmk_keyboard.git] / converter / pc98_usb / matrix.c
CommitLineData
f68c5bf0 1/*
2Copyright 2012 Jun Wako <wakojun@gmail.com>
3
4This program is free software: you can redistribute it and/or modify
5it under the terms of the GNU General Public License as published by
6the Free Software Foundation, either version 2 of the License, or
7(at your option) any later version.
8
9This program is distributed in the hope that it will be useful,
10but WITHOUT ANY WARRANTY; without even the implied warranty of
11MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12GNU General Public License for more details.
13
14You should have received a copy of the GNU General Public License
15along with this program. If not, see <http://www.gnu.org/licenses/>.
16*/
17
18#include <stdint.h>
19#include <stdbool.h>
20#include <avr/io.h>
21#include <util/delay.h>
22#include "print.h"
23#include "util.h"
24#include "matrix.h"
25#include "debug.h"
26#include "protocol/serial.h"
27
28
29/*
30 * Matrix Array usage:
31 *
32 * ROW: 16(4bits)
33 * COL: 8(3bits)
34 *
35 * 8bit wide
36 * +---------+
37 * 0|00 ... 07|
38 * 1|08 ... 0F|
39 * :| ... |
40 * :| ... |
41 * E|70 ... 77|
42 * F|78 ... 7F|
43 * +---------+
44 */
45static uint8_t matrix[MATRIX_ROWS];
46#define ROW(code) ((code>>3)&0xF)
47#define COL(code) (code&0x07)
48
49static bool is_modified = false;
50
51
52inline
53uint8_t matrix_rows(void)
54{
55 return MATRIX_ROWS;
56}
57
58inline
59uint8_t matrix_cols(void)
60{
61 return MATRIX_COLS;
62}
63
64void matrix_init(void)
65{
66 print_enable = true;
67 debug_enable = true;
4a91d182 68 //debug_matrix = true;
f68c5bf0 69
70 PC98_RST_DDR |= (1<<PC98_RST_BIT);
71 PC98_RDY_DDR |= (1<<PC98_RDY_BIT);
72 PC98_RTY_DDR |= (1<<PC98_RTY_BIT);
73 PC98_RST_PORT |= (1<<PC98_RST_BIT);
74 PC98_RDY_PORT |= (1<<PC98_RDY_BIT);
75 PC98_RTY_PORT |= (1<<PC98_RTY_BIT);
76
eb776c1b 77 DDRD |= 1<<7;
78
f68c5bf0 79
80 serial_init();
81
82 // PC98 reset
83 PC98_RST_PORT &= ~(1<<PC98_RST_BIT);
84 _delay_us(15);
85 PC98_RST_PORT |= (1<<PC98_RST_BIT);
86 _delay_us(13);
87 PC98_RDY_PORT |= (1<<PC98_RDY_BIT);
88
eb776c1b 89 // PC98 ready
90 PC98_RDY_PORT &= ~(1<<PC98_RDY_BIT);
91
f68c5bf0 92 // initialize matrix state: all keys off
93 for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00;
94
95 debug("init\n");
96 return;
97}
98
99uint8_t matrix_scan(void)
100{
101 is_modified = false;
102
4a91d182 103 uint16_t code;
f68c5bf0 104 PC98_RDY_PORT |= (1<<PC98_RDY_BIT);
eb776c1b 105 _delay_us(30);
4a91d182 106 code = serial_recv2();
f68c5bf0 107 PC98_RDY_PORT &= ~(1<<PC98_RDY_BIT);
4a91d182 108 if (code == -1) return 0;
f68c5bf0 109
110 debug_hex(code); debug(" ");
111
f68c5bf0 112 if (code&0x80) {
113 // break code
114 if (matrix_is_on(ROW(code), COL(code))) {
115 matrix[ROW(code)] &= ~(1<<COL(code));
116 is_modified = true;
117 }
118 } else {
119 // make code
120 if (!matrix_is_on(ROW(code), COL(code))) {
121 matrix[ROW(code)] |= (1<<COL(code));
122 is_modified = true;
123 }
124 }
f68c5bf0 125 return code;
126}
127
128bool matrix_is_modified(void)
129{
130 return is_modified;
131}
132
133inline
134bool matrix_has_ghost(void)
135{
136 return false;
137}
138
139inline
140bool matrix_is_on(uint8_t row, uint8_t col)
141{
142 return (matrix[row] & (1<<col));
143}
144
145inline
146uint8_t matrix_get_row(uint8_t row)
147{
148 return matrix[row];
149}
150
151void matrix_print(void)
152{
153 print("\nr/c 01234567\n");
154 for (uint8_t row = 0; row < matrix_rows(); row++) {
155 phex(row); print(": ");
156 pbin_reverse(matrix_get_row(row));
157 print("\n");
158 }
159}
160
161uint8_t matrix_key_count(void)
162{
163 uint8_t count = 0;
164 for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
165 count += bitpop(matrix[i]);
166 }
167 return count;
168}
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