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Diffstat (limited to 'keyboard/gh60/matrix.c')
| -rw-r--r-- | keyboard/gh60/matrix.c | 211 |
1 files changed, 211 insertions, 0 deletions
diff --git a/keyboard/gh60/matrix.c b/keyboard/gh60/matrix.c new file mode 100644 index 000000000..a61215152 --- /dev/null +++ b/keyboard/gh60/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 "print.h" +#include "debug.h" +#include "util.h" +#include "matrix.h" + + +#ifndef DEBOUNCE +# define DEBOUNCE 5 +#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 12 13 + * pin: F0 F1 E6 C7 C6 B6 D4 B1 B0 B5 B4 D7 D6 B3 (Rev.A) + * pin: B7 (Rev.B) + */ +static void init_cols(void) +{ + // Input with pull-up(DDR:0, PORT:1) + DDRF &= ~(1<<0 | 1<<1); + PORTF |= (1<<0 | 1<<1); + DDRE &= ~(1<<6); + PORTE |= (1<<6); + DDRD &= ~(1<<7 | 1<<6 | 1<<4); + PORTD |= (1<<7 | 1<<6 | 1<<4); + DDRC &= ~(1<<7 | 1<<6); + PORTC |= (1<<7 | 1<<6); + DDRB &= ~(1<<7 | 1<<6 | 1<< 5 | 1<<4 | 1<<3 | 1<<1 | 1<<0); + PORTB |= (1<<7 | 1<<6 | 1<< 5 | 1<<4 | 1<<3 | 1<<1 | 1<<0); +} + +static matrix_row_t read_cols(void) +{ + return (PINF&(1<<0) ? 0 : (1<<0)) | + (PINF&(1<<1) ? 0 : (1<<1)) | + (PINE&(1<<6) ? 0 : (1<<2)) | + (PINC&(1<<7) ? 0 : (1<<3)) | + (PINC&(1<<6) ? 0 : (1<<4)) | + (PINB&(1<<6) ? 0 : (1<<5)) | + (PIND&(1<<4) ? 0 : (1<<6)) | + (PINB&(1<<1) ? 0 : (1<<7)) | + ((PINB&(1<<0) && PINB&(1<<7)) ? 0 : (1<<8)) | // Rev.A and B + (PINB&(1<<5) ? 0 : (1<<9)) | + (PINB&(1<<4) ? 0 : (1<<10)) | + (PIND&(1<<7) ? 0 : (1<<11)) | + (PIND&(1<<6) ? 0 : (1<<12)) | + (PINB&(1<<3) ? 0 : (1<<13)); +} + +/* Row pin configuration + * row: 0 1 2 3 4 + * pin: D0 D1 D2 D3 D5 + */ +static void unselect_rows(void) +{ + // Hi-Z(DDR:0, PORT:0) to unselect + DDRD &= ~0b00101111; + PORTD &= ~0b00101111; +} + +static void select_row(uint8_t row) +{ + // Output low(DDR:1, PORT:0) to select + switch (row) { + case 0: + DDRD |= (1<<0); + PORTD &= ~(1<<0); + break; + case 1: + DDRD |= (1<<1); + PORTD &= ~(1<<1); + break; + case 2: + DDRD |= (1<<2); + PORTD &= ~(1<<2); + break; + case 3: + DDRD |= (1<<3); + PORTD &= ~(1<<3); + break; + case 4: + DDRD |= (1<<5); + PORTD &= ~(1<<5); + break; + } +} |