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git.gir.st - tmk_keyboard.git/blob - macway/matrix.c
7 #include <util/delay.h>
10 #include "matrix_skel.h"
13 #if (MATRIX_COLS > 16)
14 # error "MATRIX_COLS must not exceed 16"
16 #if (MATRIX_ROWS > 255)
17 # error "MATRIX_ROWS must not exceed 255"
21 // matrix state buffer(1:on, 0:off)
22 #if (MATRIX_COLS <= 8)
23 static uint8_t *matrix
;
24 static uint8_t *matrix_prev
;
25 static uint8_t _matrix0
[MATRIX_ROWS
];
26 static uint8_t _matrix1
[MATRIX_ROWS
];
28 static uint16_t *matrix
;
29 static uint16_t *matrix_prev
;
30 static uint16_t _matrix0
[MATRIX_ROWS
];
31 static uint16_t _matrix1
[MATRIX_ROWS
];
34 #ifdef MATRIX_HAS_GHOST
35 static bool matrix_has_ghost_in_row(uint8_t row
);
37 static uint8_t read_col(void);
38 static void unselect_rows(void);
39 static void select_row(uint8_t row
);
43 uint8_t matrix_rows(void)
49 uint8_t matrix_cols(void)
54 void matrix_init(void)
56 // initialize row and col
58 // Input with pull-up(DDR:0, PORT:1)
62 // initialize matrix state: all keys off
63 for (uint8_t i
=0; i
< MATRIX_ROWS
; i
++) _matrix0
[i
] = 0x00;
64 for (uint8_t i
=0; i
< MATRIX_ROWS
; i
++) _matrix1
[i
] = 0x00;
66 matrix_prev
= _matrix1
;
69 uint8_t matrix_scan(void)
77 for (uint8_t i
= 0; i
< MATRIX_ROWS
; i
++) {
80 _delay_us(30); // without this wait read unstable value.
81 matrix
[i
] = ~read_col();
87 bool matrix_is_modified(void)
89 for (uint8_t i
= 0; i
< MATRIX_ROWS
; i
++) {
90 if (matrix
[i
] != matrix_prev
[i
])
97 bool matrix_has_ghost(void)
99 #ifdef MATRIX_HAS_GHOST
100 for (uint8_t i
= 0; i
< MATRIX_ROWS
; i
++) {
101 if (matrix_has_ghost_in_row(i
))
109 bool matrix_is_on(uint8_t row
, uint8_t col
)
111 return (matrix
[row
] & (1<<col
));
115 #if (MATRIX_COLS <= 8)
116 uint8_t matrix_get_row(uint8_t row
)
118 uint16_t matrix_get_row(uint8_t row
)
124 void matrix_print(void)
126 print("\nr/c 01234567\n");
127 for (uint8_t row
= 0; row
< matrix_rows(); row
++) {
128 phex(row
); print(": ");
129 #if (MATRIX_COLS <= 8)
130 pbin_reverse(matrix_get_row(row
));
132 pbin_reverse16(matrix_get_row(row
));
134 #ifdef MATRIX_HAS_GHOST
135 if (matrix_has_ghost_in_row(row
)) {
143 uint8_t matrix_key_count(void)
146 for (uint8_t i
= 0; i
< MATRIX_ROWS
; i
++) {
147 #if (MATRIX_COLS <= 8)
148 count
+= bitpop(matrix
[i
]);
150 count
+= bitpop16(matrix
[i
]);
156 #ifdef MATRIX_HAS_GHOST
158 static bool matrix_has_ghost_in_row(uint8_t row
)
160 // no ghost exists in case less than 2 keys on
161 if (((matrix
[row
] - 1) & matrix
[row
]) == 0)
164 // ghost exists in case same state as other row
165 for (uint8_t i
=0; i
< MATRIX_ROWS
; i
++) {
166 if (i
!= row
&& (matrix
[i
] & matrix
[row
]) == matrix
[row
])
174 static uint8_t read_col(void)
180 static void unselect_rows(void)
182 // Hi-Z(DDR:0, PORT:0) to unselect
183 DDRC
&= ~0b11000000; // PC: 7,6
184 PORTC
&= ~0b11000000;
185 DDRD
&= ~0b11000111; // PD: 7,6,2,1,0
186 PORTD
&= ~0b11000111;
187 DDRF
&= ~0b11000000; // PF: 7,6
188 PORTF
&= ~0b11000000;
192 static void select_row(uint8_t row
)
194 // Output low(DDR:1, PORT:0) to select
195 // row: 0 1 2 3 4 5 6 7 8
196 // pin: PD0, PC7, PD7, PF6, PD6, PD1, PD2, PC6, PF7