blob: 05dffdb643b4eb3d4e44db852a71fd81bdd8b875 (
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
|
/*
Copyright 2017 Gabriel Young <gabeplaysdrums@live.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/>.
*/
#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 DEBOUNCING_DELAY
# define DEBOUNCING_DELAY 5
#endif
static uint8_t debouncing = DEBOUNCING_DELAY;
static matrix_row_t matrix[MATRIX_ROWS];
static matrix_row_t matrix_debouncing[MATRIX_ROWS];
static matrix_row_t scan_col(void) {
return (
(PINC&(1<<7) ? 0 : ((matrix_row_t)1<<0)) |
(PINB&(1<<5) ? 0 : ((matrix_row_t)1<<1)) |
(PINB&(1<<4) ? 0 : ((matrix_row_t)1<<2)) |
(PINB&(1<<6) ? 0 : ((matrix_row_t)1<<3)) |
(PINB&(1<<1) ? 0 : ((matrix_row_t)1<<4)) |
(PINB&(1<<2) ? 0 : ((matrix_row_t)1<<5)) |
(PINB&(1<<3) ? 0 : ((matrix_row_t)1<<6)) |
(PINB&(1<<0) ? 0 : ((matrix_row_t)1<<7))
);
}
static void select_col(uint8_t col) {
switch (col) {
case 0: PORTD = (PORTD & ~0b01111011) | 0b00011011; break;
case 1: PORTD = (PORTD & ~0b01111011) | 0b01000011; break;
case 2: PORTD = (PORTD & ~0b01111011) | 0b01101010; break;
case 3: PORTD = (PORTD & ~0b01111011) | 0b01111001; break;
case 4: PORTD = (PORTD & ~0b01111011) | 0b01100010; break;
case 5: PORTD = (PORTD & ~0b01111011) | 0b01110001; break;
case 6: PORTD = (PORTD & ~0b01111011) | 0b01100001; break;
case 7: PORTD = (PORTD & ~0b01111011) | 0b01110000; break;
case 8: PORTD = (PORTD & ~0b01111011) | 0b01100000; break;
case 9: PORTD = (PORTD & ~0b01111011) | 0b01101000; break;
case 10: PORTD = (PORTD & ~0b01111011) | 0b00101011; break;
case 11: PORTD = (PORTD & ~0b01111011) | 0b00110011; break;
case 12: PORTD = (PORTD & ~0b01111011) | 0b00100011; break;
case 13: PORTD = (PORTD & ~0b01111011) | 0b01111000; break;
case 14: PORTD = (PORTD & ~0b01111011) | 0b00010011; break;
case 15: PORTD = (PORTD & ~0b01111011) | 0b01101001; break;
case 16: PORTD = (PORTD & ~0b01111011) | 0b00001011; break;
case 17: PORTD = (PORTD & ~0b01111011) | 0b00111011; break;
}
}
void matrix_init(void) {
/* Row output pins */
DDRD |= 0b01111011;
/* Column input pins */
DDRC &= ~0b10000000;
DDRB &= ~0b01111111;
PORTC |= 0b10000000;
PORTB |= 0b01111111;
for (uint8_t i=0; i < MATRIX_ROWS; i++)
matrix[i] = matrix_debouncing[i] = 0;
matrix_init_quantum();
}
uint8_t matrix_scan(void) {
for (uint8_t col = 0; col < MATRIX_COLS; col++) {
select_col(col);
_delay_us(3);
matrix_row_t col_scan = scan_col();
for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
bool prev_bit = matrix_debouncing[row] & ((matrix_row_t)1<<col);
bool curr_bit = col_scan & (1<<row);
if (prev_bit != curr_bit) {
matrix_debouncing[row] ^= ((matrix_row_t)1<<col);
debouncing = DEBOUNCING_DELAY;
}
}
}
if (debouncing) {
if (--debouncing)
_delay_ms(1);
else
for (uint8_t i = 0; i < MATRIX_ROWS; i++)
matrix[i] = matrix_debouncing[i];
}
matrix_scan_quantum();
return 1;
}
inline matrix_row_t matrix_get_row(uint8_t row) {
return matrix[row];
}
void matrix_print(void) {
print("\nr\\c ABCDEFGHIJKLMNOPQR\n");
for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
matrix_row_t matrix_row = matrix_get_row(row);
xprintf("%02X: ", row);
for (uint8_t col = 0; col < MATRIX_COLS; col++) {
bool curr_bit = matrix_row & (1<<col);
xprintf("%c", curr_bit ? '*' : '.');
}
print("\n");
}
}
uint8_t matrix_key_count(void) {
uint8_t count = 0;
for (uint8_t row = 0; row < MATRIX_ROWS; row++)
count += bitpop32(matrix[row]);
return count;
}
|
