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git.gir.st - tmk_keyboard.git/blob - keyboard/hid_liber/matrix.c
1 /* Copyright 2012 Jun Wako <wakojun@gmail.com>
3 * This is heavily based on hid_liber/board.{c|h}.
4 * https://github.com/BathroomEpiphanies/AVR-Keyboard
6 * Copyright (c) 2012 Fredrik Atmer, Bathroom Epiphanies Inc
7 * http://bathroomepiphanies.com
9 * As for liscensing consult with the original files or its author.
14 #include <util/delay.h>
24 static uint8_t debouncing
= DEBOUNCE
;
26 // bit array of key state(1:on, 0:off)
27 static matrix_row_t
*matrix
;
28 static matrix_row_t
*matrix_debounced
;
29 static matrix_row_t _matrix0
[MATRIX_ROWS
];
30 static matrix_row_t _matrix1
[MATRIX_ROWS
];
33 #define _DDRA (uint8_t *const)&DDRA
34 #define _DDRB (uint8_t *const)&DDRB
35 #define _DDRC (uint8_t *const)&DDRC
36 #define _DDRD (uint8_t *const)&DDRD
37 #define _DDRE (uint8_t *const)&DDRE
38 #define _DDRF (uint8_t *const)&DDRF
40 #define _PINA (uint8_t *const)&PINA
41 #define _PINB (uint8_t *const)&PINB
42 #define _PINC (uint8_t *const)&PINC
43 #define _PIND (uint8_t *const)&PIND
44 #define _PINE (uint8_t *const)&PINE
45 #define _PINF (uint8_t *const)&PINF
47 #define _PORTA (uint8_t *const)&PORTA
48 #define _PORTB (uint8_t *const)&PORTB
49 #define _PORTC (uint8_t *const)&PORTC
50 #define _PORTD (uint8_t *const)&PORTD
51 #define _PORTE (uint8_t *const)&PORTE
52 #define _PORTF (uint8_t *const)&PORTF
63 /* Specifies the ports and pin numbers for the rows */
65 uint8_t *const row_ddr
[MATRIX_ROWS
] = {
68 _DDRD
, _DDRD
, _DDRD
, _DDRD
, _DDRD
, _DDRD
, _DDRD
, _DDRD
,
69 _DDRF
, _DDRF
, _DDRF
, _DDRF
, _DDRF
, _DDRF
};
72 uint8_t *const row_port
[MATRIX_ROWS
] = {
75 _PORTD
, _PORTD
, _PORTD
, _PORTD
, _PORTD
, _PORTD
, _PORTD
, _PORTD
,
76 _PORTF
, _PORTF
, _PORTF
, _PORTF
, _PORTF
, _PORTF
};
79 uint8_t *const row_pin
[MATRIX_ROWS
] = {
82 _PIND
, _PIND
, _PIND
, _PIND
, _PIND
, _PIND
, _PIND
, _PIND
,
83 _PINF
, _PINF
, _PINF
, _PINF
, _PINF
, _PINF
};
86 const uint8_t row_bit
[MATRIX_ROWS
] = {
89 _BIT0
, _BIT1
, _BIT2
, _BIT3
, _BIT4
, _BIT5
, _BIT6
, _BIT7
,
90 _BIT0
, _BIT1
, _BIT4
, _BIT5
, _BIT6
, _BIT7
};
93 const uint8_t mask
= 0x0E;
95 /* Specifies the ports and pin numbers for the columns */
97 const uint8_t col_bit
[MATRIX_COLS
] = { 0x00, 0x02, 0x04, 0x06, 0x08, 0x0A, 0x0C, 0x0E};
100 inline void pull_column(int col
) {
101 PORTB
= col_bit
[col
] | (PORTB
& ~mask
);
105 inline void release_column(int col
) {
108 /* PORTB is set as input with pull-up resistors
109 PORTC,D,E,F are set to high output */
111 void setup_io_pins(void) {
115 for(row
= 0; row
< MATRIX_ROWS
; row
++) {
116 *row_ddr
[row
] &= ~row_bit
[row
];
117 *row_port
[row
] &= ~row_bit
[row
];
122 void setup_leds(void) {
129 uint8_t matrix_rows(void)
135 uint8_t matrix_cols(void)
140 void matrix_init(void)
142 // To use PORTF disable JTAG with writing JTD bit twice within four cycles.
146 // initialize row and col
150 // initialize matrix state: all keys off
151 for (uint8_t i
=0; i
< MATRIX_ROWS
; i
++) _matrix0
[i
] = 0x00;
152 for (uint8_t i
=0; i
< MATRIX_ROWS
; i
++) _matrix1
[i
] = 0x00;
154 matrix_debounced
= _matrix1
;
157 uint8_t matrix_scan(void)
160 uint8_t *tmp
= matrix_debounced
;
161 matrix_debounced
= matrix
;
165 for (uint8_t col
= 0; col
< MATRIX_COLS
; col
++) { // 0-7
166 pull_column(col
); // output hi on theline
167 _delay_us(5); // without this wait it won't read stable value.
168 for (uint8_t row
= 0; row
< MATRIX_ROWS
; row
++) { // 0-17
169 bool prev_bit
= matrix
[row
] & (1<<col
);
170 bool curr_bit
= *row_pin
[row
] & row_bit
[row
];
171 if (prev_bit
!= curr_bit
) {
172 matrix
[row
] ^= (1<<col
);
174 debug("bounce!: "); debug_hex(debouncing
); print("\n");
176 debouncing
= DEBOUNCE
;
190 bool matrix_is_modified(void)
192 // NOTE: no longer used
197 bool matrix_has_ghost(void)
203 bool matrix_is_on(uint8_t row
, uint8_t col
)
205 return (matrix_debounced
[row
] & (1<<col
));
209 matrix_row_t
matrix_get_row(uint8_t row
)
211 return matrix_debounced
[row
];
214 void matrix_print(void)
216 print("\nr/c 01234567\n");
217 for (uint8_t row
= 0; row
< MATRIX_ROWS
; row
++) {
218 phex(row
); print(": ");
219 pbin_reverse(matrix_get_row(row
));
224 uint8_t matrix_key_count(void)
227 for (uint8_t i
= 0; i
< MATRIX_ROWS
; i
++) {
228 for (uint8_t j
= 0; j
< MATRIX_COLS
; j
++) {
229 if (matrix_is_on(i
, j
))