2 Copyright 2014 Kai Ryu <kai1103@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>
29 #ifdef UART_RGB_ENABLE
36 static uint8_t debouncing = DEBOUNCE;
38 /* matrix state(1:on, 0:off) */
39 static matrix_row_t matrix[MATRIX_ROWS];
40 static matrix_row_t matrix_debouncing[MATRIX_ROWS];
42 static matrix_row_t read_cols(void);
43 static void init_cols(void);
44 static void init_rows(void);
45 static void unselect_rows(void);
46 static void select_row(uint8_t row);
49 uint8_t matrix_rows(void)
55 uint8_t matrix_cols(void)
60 void matrix_init(void)
63 #ifdef UART_RGB_ENABLE
74 // initialize row and col
78 // initialize matrix state: all keys off
79 for (uint8_t i=0; i < MATRIX_ROWS; i++) {
81 matrix_debouncing[i] = 0;
85 uint8_t matrix_scan(void)
87 for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
89 _delay_us(30); // without this wait read unstable value.
90 matrix_row_t cols = read_cols();
91 if (matrix_debouncing[i] != cols) {
92 matrix_debouncing[i] = cols;
94 debug("bounce!: "); debug_hex(debouncing); debug("\n");
96 debouncing = DEBOUNCE;
105 for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
106 matrix[i] = matrix_debouncing[i];
114 bool matrix_is_modified(void)
116 if (debouncing) return false;
121 bool matrix_is_on(uint8_t row, uint8_t col)
123 return (matrix[row] & ((matrix_row_t)1<<col));
127 matrix_row_t matrix_get_row(uint8_t row)
132 void matrix_print(void)
134 print("\nr/c 0123456789ABCDEF\n");
135 for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
136 phex(row); print(": ");
137 pbin_reverse16(matrix_get_row(row));
142 uint8_t matrix_key_count(void)
145 for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
146 count += bitpop16(matrix[i]);
151 /* Column pin configuration
152 * col: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
153 * pin: F7 F6 F5 F4 F1 F0 E6 D7 D6 D5 D1 D0 B7 B6 B0 C7
155 static void init_cols(void)
157 // Input with pull-up(DDR:0, PORT:1)
164 DDRB &= ~(_BV(PB6) | _BV(PB7)| _BV(PB0));
165 PORTB |= (_BV(PB6) | _BV(PB7)| _BV(PB0));
175 static matrix_row_t read_cols(void)
178 return (PINF&_BV(PF7) ? 0 : (1<<0)) |
179 (PINF&_BV(PF6) ? 0 : (1<<1)) |
180 (PINF&_BV(PF5) ? 0 : (1<<2)) |
181 (PINF&_BV(PF4) ? 0 : (1<<3)) |
182 (PINF&_BV(PF1) ? 0 : (1<<4)) |
183 (PINF&_BV(PF0) ? 0 : (1<<5)) |
184 (PINE&_BV(PE6) ? 0 : (1<<6)) |
185 (PIND&_BV(PD7) ? 0 : (1<<7)) |
186 (PIND&_BV(PD6) ? 0 : (1<<8)) |
187 (PIND&_BV(PD5) ? 0 : (1<<9)) |
188 (PIND&_BV(PD1) ? 0 : (1<<10)) |
189 (PIND&_BV(PD0) ? 0 : (1<<11)) |
190 (PINB&_BV(PB7) ? 0 : (1<<12)) |
191 (PINB&_BV(PB6) ? 0 : (1<<13)) |
192 (PINB&_BV(PB0) ? 0 : (1<<14)) |
193 (PINC&_BV(PC7) ? 0 : (1<<15));
196 /* Row pin configuration
198 * pin: B3 0 1 0 1 0 1 1
203 static void init_rows(void)
205 DDRB |= (1<<PB1 | 1<<PB2 | 1<<PB3);
208 static void unselect_rows(void)
210 // Hi-Z(DDR:0, PORT:0) to unselect
216 static void select_row(uint8_t row)
218 // Output low(DDR:1, PORT:0) to select
219 (row & (1<<0)) ? (PORTB |= (1<<PB3)) : (PORTB &= ~(1<<PB3));
220 (row & (1<<1)) ? (PORTB |= (1<<PB2)) : (PORTB &= ~(1<<PB2));
221 (row & (1<<2)) ? (PORTB |= (1<<PB1)) : (PORTB &= ~(1<<PB1));