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Diffstat (limited to 'keyboard/atomic/matrix.c')
| -rw-r--r-- | keyboard/atomic/matrix.c | 211 |
1 files changed, 211 insertions, 0 deletions
diff --git a/keyboard/atomic/matrix.c b/keyboard/atomic/matrix.c new file mode 100644 index 0000000000..98102cb694 --- /dev/null +++ b/keyboard/atomic/matrix.c @@ -0,0 +1,211 @@ +/* +Copyright 2012 Jun Wako <wakojun@gmail.com> + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, either version 2 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ + +/* + * scan matrix + */ +#include <stdint.h> +#include <stdbool.h> +#include <avr/io.h> +#include <util/delay.h> +#include "action_layer.h" +#include "print.h" +#include "debug.h" +#include "util.h" +#include "matrix.h" + + +#ifndef DEBOUNCE +# define DEBOUNCE 10 +#endif +static uint8_t debouncing = DEBOUNCE; + +/* matrix state(1:on, 0:off) */ +static matrix_row_t matrix[MATRIX_ROWS]; +static matrix_row_t matrix_debouncing[MATRIX_ROWS]; + +static matrix_row_t read_cols(void); +static void init_cols(void); +static void unselect_rows(void); +static void select_row(uint8_t row); + + +inline +uint8_t matrix_rows(void) +{ + return MATRIX_ROWS; +} + +inline +uint8_t matrix_cols(void) +{ + return MATRIX_COLS; +} + + +void matrix_init(void) +{ + // initialize row and col + unselect_rows(); + init_cols(); + + // initialize matrix state: all keys off + for (uint8_t i=0; i < MATRIX_ROWS; i++) { + matrix[i] = 0; + matrix_debouncing[i] = 0; + } +} + +uint8_t matrix_scan(void) +{ + for (uint8_t i = 0; i < MATRIX_ROWS; i++) { + select_row(i); + _delay_us(30); // without this wait read unstable value. + matrix_row_t cols = read_cols(); + if (matrix_debouncing[i] != cols) { + matrix_debouncing[i] = cols; + if (debouncing) { + debug("bounce!: "); debug_hex(debouncing); debug("\n"); + } + debouncing = DEBOUNCE; + } + unselect_rows(); + } + + if (debouncing) { + if (--debouncing) { + _delay_ms(1); + } else { + for (uint8_t i = 0; i < MATRIX_ROWS; i++) { + matrix[i] = matrix_debouncing[i]; + } + } + } + + + return 1; +} + +bool matrix_is_modified(void) +{ + if (debouncing) return false; + return true; +} + +inline +bool matrix_is_on(uint8_t row, uint8_t col) +{ + return (matrix[row] & ((matrix_row_t)1<<col)); +} + +inline +matrix_row_t matrix_get_row(uint8_t row) +{ + return matrix[row]; +} + +void matrix_print(void) +{ + print("\nr/c 0123456789ABCDEF\n"); + for (uint8_t row = 0; row < MATRIX_ROWS; row++) { + phex(row); print(": "); + pbin_reverse16(matrix_get_row(row)); + print("\n"); + } +} + +uint8_t matrix_key_count(void) +{ + uint8_t count = 0; + for (uint8_t i = 0; i < MATRIX_ROWS; i++) { + count += bitpop16(matrix[i]); + } + return count; +} + +/* Column pin configuration + * col: 0 1 2 3 4 5 6 7 8 9 10 11 + * pin: F0 F1 F4 F5 F6 F7 B6 B5 B4 D7 D5 D4 + */ + +static void init_cols(void) +{ + DDRC &= ~(1<<6 | 1<<7); + PORTC |= (1<<6 | 1<<7); + DDRD &= ~(1<<4 | 1<<5 | 1<<6 | 1<<7); + PORTD |= (1<<4 | 1<<5 | 1<<6 | 1<<7); + DDRB &= ~(1<<4 | 1<<5 | 1<<6); + PORTB |= (1<<4 | 1<<5 | 1<<6); + DDRF &= ~(1<<0 | 1<<1 | 1<<4 | 1<<5 | 1<<6 | 1<<7); + PORTF |= (1<<0 | 1<<1 | 1<<4 | 1<<5 | 1<<6 | 1<<7); +} + +static matrix_row_t read_cols(void) +{ + return (PINC&(1<<6) ? 0 : (1<< 0)) | + (PINC&(1<<7) ? 0 : (1<< 1)) | + (PIND&(1<<5) ? 0 : (1<< 2)) | + (PIND&(1<<4) ? 0 : (1<< 3)) | + (PIND&(1<<6) ? 0 : (1<< 4)) | + (PIND&(1<<7) ? 0 : (1<< 5)) | + (PINB&(1<<4) ? 0 : (1<< 6)) | + (PINB&(1<<5) ? 0 : (1<< 7)) | + (PINB&(1<<6) ? 0 : (1<< 8)) | + (PINF&(1<<7) ? 0 : (1<< 9)) | + (PINF&(1<<6) ? 0 : (1<<10)) | + (PINF&(1<<5) ? 0 : (1<<11)) | + (PINF&(1<<4) ? 0 : (1<<12)) | + (PINF&(1<<1) ? 0 : (1<<13)) | + (PINF&(1<<0) ? 0 : (1<<14)); +} + +/* Row pin configuration + * row: 0 1 2 3 + * pin: B0 B1 B2 B3 + */ +static void unselect_rows(void) +{ + // Hi-Z(DDR:0, PORT:0) to unselect + DDRB &= ~(1<<0 | 1<<1 | 1<<2 | 1<<3 | 1<<7); + PORTB |= (1<<0 | 1<<1 | 1<<2 | 1<<3 | 1<<7); +} + +static void select_row(uint8_t row) +{ + switch (row) { + case 0: + DDRB |= (1<<0); + PORTB &= ~(1<<0); + break; + case 1: + DDRB |= (1<<1); + PORTB &= ~(1<<1); + break; + case 2: + DDRB |= (1<<2); + PORTB &= ~(1<<2); + break; + case 3: + DDRB |= (1<<3); + PORTB &= ~(1<<3); + break; + case 4: + DDRB |= (1<<7); + PORTB &= ~(1<<7); + break; + } +} |