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1 | /* | |
2 | Copyright 2012 Jun Wako <wakojun@gmail.com> | |
3 | ||
4 | This program is free software: you can redistribute it and/or modify | |
5 | it under the terms of the GNU General Public License as published by | |
6 | the Free Software Foundation, either version 2 of the License, or | |
7 | (at your option) any later version. | |
8 | ||
9 | This program is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | GNU General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU General Public License | |
15 | along 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 | */ | |
45 | static uint8_t matrix[MATRIX_ROWS]; | |
46 | #define ROW(code) ((code>>3)&0xF) | |
47 | #define COL(code) (code&0x07) | |
48 | ||
49 | static bool is_modified = false; | |
50 | ||
51 | ||
52 | inline | |
53 | uint8_t matrix_rows(void) | |
54 | { | |
55 | return MATRIX_ROWS; | |
56 | } | |
57 | ||
58 | inline | |
59 | uint8_t matrix_cols(void) | |
60 | { | |
61 | return MATRIX_COLS; | |
62 | } | |
63 | ||
64 | void matrix_init(void) | |
65 | { | |
66 | print_enable = true; | |
67 | debug_enable = true; | |
68 | //debug_matrix = true; | |
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 | ||
77 | DDRD |= 1<<7; | |
78 | ||
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 | ||
89 | // PC98 ready | |
90 | PC98_RDY_PORT &= ~(1<<PC98_RDY_BIT); | |
91 | ||
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 | ||
99 | uint8_t matrix_scan(void) | |
100 | { | |
101 | is_modified = false; | |
102 | ||
103 | uint16_t code; | |
104 | PC98_RDY_PORT |= (1<<PC98_RDY_BIT); | |
105 | _delay_us(30); | |
106 | code = serial_recv2(); | |
107 | PC98_RDY_PORT &= ~(1<<PC98_RDY_BIT); | |
108 | if (code == -1) return 0; | |
109 | ||
110 | debug_hex(code); debug(" "); | |
111 | ||
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 | } | |
125 | return code; | |
126 | } | |
127 | ||
128 | bool matrix_is_modified(void) | |
129 | { | |
130 | return is_modified; | |
131 | } | |
132 | ||
133 | inline | |
134 | bool matrix_has_ghost(void) | |
135 | { | |
136 | return false; | |
137 | } | |
138 | ||
139 | inline | |
140 | bool matrix_is_on(uint8_t row, uint8_t col) | |
141 | { | |
142 | return (matrix[row] & (1<<col)); | |
143 | } | |
144 | ||
145 | inline | |
146 | uint8_t matrix_get_row(uint8_t row) | |
147 | { | |
148 | return matrix[row]; | |
149 | } | |
150 | ||
151 | void 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 | ||
161 | uint8_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 | } |