2 Copyright 2012 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>
34 static uint8_t debouncing
= DEBOUNCE
;
36 /* matrix state(1:on, 0:off) */
37 static matrix_row_t matrix
[MATRIX_ROWS
];
38 static matrix_row_t matrix_debouncing
[MATRIX_ROWS
];
40 static matrix_row_t
read_cols(void);
41 static void init_cols(void);
42 static void unselect_rows(void);
43 static void select_row(uint8_t row
);
47 uint8_t matrix_rows(void)
53 uint8_t matrix_cols(void)
58 void matrix_init(void)
60 // initialize row and col
64 // initialize matrix state: all keys off
65 for (uint8_t i
=0; i
< MATRIX_ROWS
; i
++) {
67 matrix_debouncing
[i
] = 0;
71 uint8_t matrix_scan(void)
73 for (uint8_t i
= 0; i
< MATRIX_ROWS
; i
++) {
75 _delay_us(30); // without this wait read unstable value.
76 matrix_row_t cols
= read_cols();
77 if (matrix_debouncing
[i
] != cols
) {
78 matrix_debouncing
[i
] = cols
;
80 debug("bounce!: "); debug_hex(debouncing
); debug("\n");
82 debouncing
= DEBOUNCE
;
91 for (uint8_t i
= 0; i
< MATRIX_ROWS
; i
++) {
92 matrix
[i
] = matrix_debouncing
[i
];
100 bool matrix_is_modified(void)
102 if (debouncing
) return false;
107 bool matrix_is_on(uint8_t row
, uint8_t col
)
109 return (matrix
[row
] & ((matrix_row_t
)1<<col
));
113 matrix_row_t
matrix_get_row(uint8_t row
)
118 void matrix_print(void)
120 print("\nr/c 0123456789ABCDEF\n");
121 for (uint8_t row
= 0; row
< MATRIX_ROWS
; row
++) {
122 phex(row
); print(": ");
123 pbin_reverse16(matrix_get_row(row
));
128 uint8_t matrix_key_count(void)
131 for (uint8_t i
= 0; i
< MATRIX_ROWS
; i
++) {
132 count
+= bitpop16(matrix
[i
]);
137 /* Column pin configuration
138 * col: 0 1 2 3 4 5 6 7 8 9 10 11 12 13
139 * pin: F0 F1 E6 C7 C6 B6 D4 B1 B0 B5 B4 D7 D6 B3
141 static void init_cols(void)
143 // Input with pull-up(DDR:0, PORT:1)
144 DDRF
&= ~(1<<0 | 1<<1);
145 PORTF
|= (1<<0 | 1<<1);
148 DDRD
&= ~(1<<7 | 1<<6 | 1<<4);
149 PORTD
|= (1<<7 | 1<<6 | 1<<4);
150 DDRC
&= ~(1<<7 | 1<<6);
151 PORTC
|= (1<<7 | 1<<6);
152 DDRB
&= ~(1<<6 | 1<< 5 | 1<<4 | 1<<3 | 1<<1 | 1<<0);
153 PORTB
|= (1<<6 | 1<< 5 | 1<<4 | 1<<3 | 1<<1 | 1<<0);
156 static matrix_row_t
read_cols(void)
158 return (PINF
&(1<<0) ? 0 : (1<<0)) |
159 (PINF
&(1<<1) ? 0 : (1<<1)) |
160 (PINE
&(1<<6) ? 0 : (1<<2)) |
161 (PINC
&(1<<7) ? 0 : (1<<3)) |
162 (PINC
&(1<<6) ? 0 : (1<<4)) |
163 (PINB
&(1<<6) ? 0 : (1<<5)) |
164 (PIND
&(1<<4) ? 0 : (1<<6)) |
165 (PINB
&(1<<1) ? 0 : (1<<7)) |
166 (PINB
&(1<<0) ? 0 : (1<<8)) |
167 (PINB
&(1<<5) ? 0 : (1<<9)) |
168 (PINB
&(1<<4) ? 0 : (1<<10)) |
169 (PIND
&(1<<7) ? 0 : (1<<11)) |
170 (PIND
&(1<<6) ? 0 : (1<<12)) |
171 (PINB
&(1<<3) ? 0 : (1<<13));
174 /* Row pin configuration
176 * pin: D0 D1 D2 D3 D5
178 static void unselect_rows(void)
180 // Hi-Z(DDR:0, PORT:0) to unselect
182 PORTD
&= ~0b00101111;
185 static void select_row(uint8_t row
)
187 // Output low(DDR:1, PORT:0) to select