diff options
Diffstat (limited to 'keyboard/hid_liber/matrix.c')
| -rw-r--r-- | keyboard/hid_liber/matrix.c | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/keyboard/hid_liber/matrix.c b/keyboard/hid_liber/matrix.c new file mode 100644 index 0000000000..975ff9aaca --- /dev/null +++ b/keyboard/hid_liber/matrix.c @@ -0,0 +1,233 @@ +/* +Copyright 2011 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/>. +*/ +#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; + +// bit array of key state(1:on, 0:off) +static matrix_row_t *matrix; +static matrix_row_t *matrix_debounced; +static matrix_row_t _matrix0[MATRIX_ROWS]; +static matrix_row_t _matrix1[MATRIX_ROWS]; + + +#define NROW 18 +#define NCOL 8 +#define _DDRA (uint8_t *const)&DDRA +#define _DDRB (uint8_t *const)&DDRB +#define _DDRC (uint8_t *const)&DDRC +#define _DDRD (uint8_t *const)&DDRD +#define _DDRE (uint8_t *const)&DDRE +#define _DDRF (uint8_t *const)&DDRF + +#define _PINA (uint8_t *const)&PINA +#define _PINB (uint8_t *const)&PINB +#define _PINC (uint8_t *const)&PINC +#define _PIND (uint8_t *const)&PIND +#define _PINE (uint8_t *const)&PINE +#define _PINF (uint8_t *const)&PINF + +#define _PORTA (uint8_t *const)&PORTA +#define _PORTB (uint8_t *const)&PORTB +#define _PORTC (uint8_t *const)&PORTC +#define _PORTD (uint8_t *const)&PORTD +#define _PORTE (uint8_t *const)&PORTE +#define _PORTF (uint8_t *const)&PORTF + +#define _BIT0 0x01 +#define _BIT1 0x02 +#define _BIT2 0x04 +#define _BIT3 0x08 +#define _BIT4 0x10 +#define _BIT5 0x20 +#define _BIT6 0x40 +#define _BIT7 0x80 + +/* Specifies the ports and pin numbers for the rows */ +static +uint8_t *const row_ddr[NROW] = { _DDRB, _DDRB, + _DDRC, _DDRC, + _DDRD, _DDRD, _DDRD, _DDRD, _DDRD, _DDRD, _DDRD, _DDRD, + _DDRF, _DDRF, _DDRF, _DDRF, _DDRF, _DDRF}; + +static +uint8_t *const row_port[NROW] = { _PORTB, _PORTB, + _PORTC, _PORTC, + _PORTD, _PORTD, _PORTD, _PORTD, _PORTD, _PORTD, _PORTD, _PORTD, + _PORTF, _PORTF, _PORTF, _PORTF, _PORTF, _PORTF}; + +static +uint8_t *const row_pin[NROW] = { _PINB, _PINB, + _PINC, _PINC, + _PIND, _PIND, _PIND, _PIND, _PIND, _PIND, _PIND, _PIND, + _PINF, _PINF, _PINF, _PINF, _PINF, _PINF}; + +static +const uint8_t row_bit[NROW] = { _BIT4, _BIT7, + _BIT6, _BIT7, + _BIT0, _BIT1, _BIT2, _BIT3, _BIT4, _BIT5, _BIT6, _BIT7, + _BIT0, _BIT1, _BIT4, _BIT5, _BIT6, _BIT7}; + +static +const uint8_t mask = 0x0E; + +/* Specifies the ports and pin numbers for the columns */ +static +const uint8_t col_bit[NCOL] = { 0x00, 0x02, 0x04, 0x06, 0x08, 0x0A, 0x0C, 0x0E}; + +static +inline void pull_column(int col) { + PORTB = col_bit[col] | (PORTB & ~mask); +} + +static +inline void release_column(int col) { +} + +/* PORTB is set as input with pull-up resistors + PORTC,D,E,F are set to high output */ +static +void setup_io_pins(void) { + uint8_t row; + DDRB |= 0x0E; + PORTB &= ~0x0E; + for(row = 0; row < NROW; row++) { + *row_ddr[row] &= ~row_bit[row]; + *row_port[row] &= ~row_bit[row]; + } +} + +static +void setup_leds(void) { + DDRB |= 0x60; + PORTB |= 0x60; +} + + +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 + setup_io_pins(); + setup_leds(); + + // initialize matrix state: all keys off + for (uint8_t i=0; i < MATRIX_ROWS; i++) _matrix0[i] = 0x00; + for (uint8_t i=0; i < MATRIX_ROWS; i++) _matrix1[i] = 0x00; + matrix = _matrix0; + matrix_debounced = _matrix1; +} + +uint8_t matrix_scan(void) +{ + if (!debouncing) { + uint8_t *tmp = matrix_debounced; + matrix_debounced = matrix; + matrix = tmp; + } + + for (uint8_t col = 0; col < NCOL; col++) { // 0-7 + pull_column(col); // output hi on theline + _delay_us(1); // without this wait it won't read stable value. + for (uint8_t row = 0; row < NROW; row++) { // 0-17 + bool prev_bit = matrix[row] & (1<<col); + bool curr_bit = *row_pin[row] & row_bit[row]; + if (prev_bit != curr_bit) { + matrix[row] ^= (1<<col); + if (debouncing) { + debug("bounce!: "); debug_hex(debouncing); print("\n"); + } + debouncing = DEBOUNCE; + } + } + release_column(col); + } + + if (debouncing) { + debouncing--; + } + + return 1; +} + +bool matrix_is_modified(void) +{ + // NOTE: no longer used + return true; +} + +inline +bool matrix_has_ghost(void) +{ + return false; +} + +inline +bool matrix_is_on(uint8_t row, uint8_t col) +{ + return (matrix_debounced[row] & (1<<col)); +} + +inline +matrix_row_t matrix_get_row(uint8_t row) +{ + return matrix_debounced[row]; +} + +void matrix_print(void) +{ + print("\nr/c 01234567\n"); + for (uint8_t row = 0; row < MATRIX_ROWS; row++) { + phex(row); print(": "); + pbin_reverse(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++) { + for (uint8_t j = 0; j < MATRIX_COLS; j++) { + if (matrix_is_on(i, j)) + count++; + } + } + return count; +} |