summaryrefslogtreecommitdiffstats
path: root/keyboard/gh60/matrix.c
blob: 85e58fe3615c8b9c993a13c017e8cacc4da8f990 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
/*
Copyright 2012 Jun Wako <wakojun@gmail.com>

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

/*
 * scan matrix
 */
#include <stdint.h>
#include <stdbool.h>
#include <avr/io.h>
#include <util/delay.h>
#include "print.h"
#include "debug.h"
#include "util.h"
#include "matrix.h"


#ifndef DEBOUNCE
#   define DEBOUNCE	5
#endif
static uint8_t debouncing = DEBOUNCE;

/* matrix state(1:on, 0:off) */
static uint16_t *matrix;
static uint16_t *matrix_debouncing;
static uint16_t matrix0[MATRIX_ROWS];
static uint16_t matrix1[MATRIX_ROWS];
static bool is_modified;

static uint16_t read_cols(void);
static void init_cols(void);
static void unselect_rows(void);
static void select_row(uint8_t row);


inline
uint8_t matrix_rows(void)
{
    return MATRIX_ROWS;
}

inline
uint8_t matrix_cols(void)
{
    return MATRIX_COLS;
}

void matrix_init(void)
{
    // initialize row and col
    unselect_rows();
    init_cols();

    // initialize matrix state: all keys off
    matrix = matrix0;
    matrix_debouncing = matrix1;
    for (uint8_t i=0; i < MATRIX_ROWS; i++) {
        matrix[i] = 0;
        matrix_debouncing[i] = 0;
    }
    is_modified = false;
}

uint8_t matrix_scan(void)
{
    for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
        //unselect_rows();
        select_row(i);
        _delay_us(30);  // without this wait read unstable value.
        uint16_t cols = read_cols();
        if (matrix_debouncing[i] != cols) {
            matrix_debouncing[i] = cols;
            if (debouncing) {
                debug("bounce!: "); debug_hex(debouncing); debug("\n");
            }
            debouncing = DEBOUNCE;
            is_modified = false;
        }
        unselect_rows();
    }
    //unselect_rows();

    if (debouncing) {
        debouncing--;
        _delay_ms(1);
    } else {
        uint16_t *tmp = matrix;
        matrix = matrix_debouncing;
        matrix_debouncing = tmp;
        is_modified = true;
    }

    return 1;
}

bool matrix_is_modified(void)
{
    return is_modified;
}

inline
bool matrix_has_ghost(void)
{
    return false;
}

inline
bool matrix_is_on(uint8_t row, uint8_t col)
{
    return (matrix[row] & (1<<col));
}

inline
uint16_t matrix_get_row(uint8_t row)
{
    return matrix[row];
}

void matrix_print(void)
{
    print("\nr/c 0123456789ABCDEF\n");
    for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
        phex(row); print(": ");
        pbin_reverse16(matrix_get_row(row));
        print("\n");
    }
}

uint8_t matrix_key_count(void)
{
    uint8_t count = 0;
    for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
        count += bitpop16(matrix[i]);
    }
    return count;
}

/* Column pin configuration
 * col: 0   1   2   3   4   5   6   7   8   9   10  11  12  13
 * pin: F0  F1  E6  C7  C6  B6  D4  B1  B0  B5  B4  D7  D6  B3
 */
static void  init_cols(void)
{
    // Input with pull-up(DDR:0, PORT:1)
    DDRF  &= ~(1<<0 | 1<<1);
    PORTF |=  (1<<0 | 1<<1);
    DDRE  &= ~(1<<6);
    PORTE |=  (1<<6);
    DDRD  &= ~(1<<7 | 1<<6 | 1<<4);
    PORTD |=  (1<<7 | 1<<6 | 1<<4);
    DDRC  &= ~(1<<7 | 1<<6);
    PORTC |=  (1<<7 | 1<<6);
    DDRB  &= ~(1<<6 | 1<< 5 | 1<<4 | 1<<3 | 1<<1 | 1<<0);
    PORTB |=  (1<<6 | 1<< 5 | 1<<4 | 1<<3 | 1<<1 | 1<<0);
}

static uint16_t read_cols(void)
{
    return (PINF&(1<<0) ? 0 : (1<<0)) |
           (PINF&(1<<1) ? 0 : (1<<1)) |
           (PINE&(1<<6) ? 0 : (1<<2)) |
           (PINC&(1<<7) ? 0 : (1<<3)) |
           (PINC&(1<<6) ? 0 : (1<<4)) |
           (PINB&(1<<6) ? 0 : (1<<5)) |
           (PIND&(1<<4) ? 0 : (1<<6)) |
           (PINB&(1<<1) ? 0 : (1<<7)) |
           (PINB&(1<<0) ? 0 : (1<<8)) |
           (PINB&(1<<5) ? 0 : (1<<9)) |
           (PINB&(1<<4) ? 0 : (1<<10)) |
           (PIND&(1<<7) ? 0 : (1<<11)) |
           (PIND&(1<<6) ? 0 : (1<<12)) |
           (PINB&(1<<3) ? 0 : (1<<13));
}

/* Row pin configuration
 * row: 0   1   2   3   4
 * pin: D0  D1  D2  D3  D5
 */
static void unselect_rows(void)
{
    // Hi-Z(DDR:0, PORT:0) to unselect
    DDRD  &= ~0b00101111;
    PORTD &= ~0b00101111;
}

static void select_row(uint8_t row)
{
    // Output low(DDR:1, PORT:0) to select
    switch (row) {
        case 0:
            DDRD  |= (1<<0);
            PORTD &= ~(1<<0);
            break;
        case 1:
            DDRD  |= (1<<1);
            PORTD &= ~(1<<1);
            break;
        case 2:
            DDRD  |= (1<<2);
            PORTD &= ~(1<<2);
            break;
        case 3:
            DDRD  |= (1<<3);
            PORTD &= ~(1<<3);
            break;
        case 4:
            DDRD  |= (1<<5);
            PORTD &= ~(1<<5);
            break;
    }
}