]>
git.gir.st - tmk_keyboard.git/blob - keyboard/macway/matrix.c
2 Copyright 2011 Jun Wako <wakojun@gmail.com>
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.
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.
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/>.
24 #include <util/delay.h>
31 #if (MATRIX_COLS > 16)
32 # error "MATRIX_COLS must not exceed 16"
34 #if (MATRIX_ROWS > 255)
35 # error "MATRIX_ROWS must not exceed 255"
42 static uint8_t debouncing
= DEBOUNCE
;
44 // matrix state buffer(1:on, 0:off)
45 #if (MATRIX_COLS <= 8)
46 static uint8_t *matrix
;
47 static uint8_t *matrix_prev
;
48 static uint8_t _matrix0
[MATRIX_ROWS
];
49 static uint8_t _matrix1
[MATRIX_ROWS
];
51 static uint16_t *matrix
;
52 static uint16_t *matrix_prev
;
53 static uint16_t _matrix0
[MATRIX_ROWS
];
54 static uint16_t _matrix1
[MATRIX_ROWS
];
57 #ifdef MATRIX_HAS_GHOST
58 static bool matrix_has_ghost_in_row(uint8_t row
);
60 static uint8_t read_col(void);
61 static void unselect_rows(void);
62 static void select_row(uint8_t row
);
66 uint8_t matrix_rows(void)
72 uint8_t matrix_cols(void)
77 void matrix_init(void)
79 // initialize row and col
81 // Input with pull-up(DDR:0, PORT:1)
85 // initialize matrix state: all keys off
86 for (uint8_t i
=0; i
< MATRIX_ROWS
; i
++) _matrix0
[i
] = 0x00;
87 for (uint8_t i
=0; i
< MATRIX_ROWS
; i
++) _matrix1
[i
] = 0x00;
89 matrix_prev
= _matrix1
;
92 uint8_t matrix_scan(void)
95 uint8_t *tmp
= matrix_prev
;
100 for (uint8_t i
= 0; i
< MATRIX_ROWS
; i
++) {
103 _delay_us(30); // without this wait read unstable value.
104 if (matrix
[i
] != (uint8_t)~read_col()) {
105 matrix
[i
] = (uint8_t)~read_col();
107 debug("bounce!: "); debug_hex(debouncing
); print("\n");
109 debouncing
= DEBOUNCE
;
121 bool matrix_is_modified(void)
123 if (debouncing
) return false;
124 for (uint8_t i
= 0; i
< MATRIX_ROWS
; i
++) {
125 if (matrix
[i
] != matrix_prev
[i
]) {
133 bool matrix_has_ghost(void)
135 #ifdef MATRIX_HAS_GHOST
136 for (uint8_t i
= 0; i
< MATRIX_ROWS
; i
++) {
137 if (matrix_has_ghost_in_row(i
))
145 bool matrix_is_on(uint8_t row
, uint8_t col
)
147 return (matrix
[row
] & (1<<col
));
151 #if (MATRIX_COLS <= 8)
152 uint8_t matrix_get_row(uint8_t row
)
154 uint16_t matrix_get_row(uint8_t row
)
160 void matrix_print(void)
162 print("\nr/c 01234567\n");
163 for (uint8_t row
= 0; row
< matrix_rows(); row
++) {
164 phex(row
); print(": ");
165 #if (MATRIX_COLS <= 8)
166 pbin_reverse(matrix_get_row(row
));
168 pbin_reverse16(matrix_get_row(row
));
170 #ifdef MATRIX_HAS_GHOST
171 if (matrix_has_ghost_in_row(row
)) {
179 uint8_t matrix_key_count(void)
182 for (uint8_t i
= 0; i
< MATRIX_ROWS
; i
++) {
183 #if (MATRIX_COLS <= 8)
184 count
+= bitpop(matrix
[i
]);
186 count
+= bitpop16(matrix
[i
]);
192 #ifdef MATRIX_HAS_GHOST
194 static bool matrix_has_ghost_in_row(uint8_t row
)
196 // no ghost exists in case less than 2 keys on
197 if (((matrix
[row
] - 1) & matrix
[row
]) == 0)
200 // ghost exists in case same state as other row
201 for (uint8_t i
=0; i
< MATRIX_ROWS
; i
++) {
202 if (i
!= row
&& (matrix
[i
] & matrix
[row
]) == matrix
[row
])
210 static uint8_t read_col(void)
216 static void unselect_rows(void)
218 // Hi-Z(DDR:0, PORT:0) to unselect
219 DDRC
&= ~0b01000000; // PC: 6
220 PORTC
&= ~0b11000000;
221 DDRD
&= ~0b11100111; // PD: 7,6,5,2,1,0
222 PORTD
&= ~0b11000111;
223 DDRF
&= ~0b11000000; // PF: 7,6
224 PORTF
&= ~0b11000000;
228 static void select_row(uint8_t row
)
230 // Output low(DDR:1, PORT:0) to select
231 // row: 0 1 2 3 4 5 6 7 8
232 // pin: PD0, PD5, PD7, PF6, PD6, PD1, PD2, PC6, PF7