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Diffstat (limited to 'hhkb/matrix.c')
-rw-r--r-- | hhkb/matrix.c | 294 |
1 files changed, 0 insertions, 294 deletions
diff --git a/hhkb/matrix.c b/hhkb/matrix.c deleted file mode 100644 index 350066b90..000000000 --- a/hhkb/matrix.c +++ /dev/null @@ -1,294 +0,0 @@ -/* -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/>. -*/ - -/* - * scan matrix - */ -#include <stdint.h> -#include <stdbool.h> -#include <avr/io.h> -#include <avr/interrupt.h> -#include <util/delay.h> -#include "print.h" -#include "util.h" -#include "timer.h" -#include "matrix.h" - - -// Timer resolution check -#if (1000000/TIMER_RAW_FREQ > 20) -# error "Timer resolution(>20us) is not enough for HHKB matrix scan tweak on V-USB." -#endif - -#if (MATRIX_COLS > 16) -# error "MATRIX_COLS must not exceed 16" -#endif -#if (MATRIX_ROWS > 255) -# error "MATRIX_ROWS must not exceed 255" -#endif - - -// matrix state buffer(1:on, 0:off) -#if (MATRIX_COLS <= 8) -static uint8_t *matrix; -static uint8_t *matrix_prev; -static uint8_t _matrix0[MATRIX_ROWS]; -static uint8_t _matrix1[MATRIX_ROWS]; -#else -static uint16_t *matrix; -static uint16_t *matrix_prev; -static uint16_t _matrix0[MATRIX_ROWS]; -static uint16_t _matrix1[MATRIX_ROWS]; -#endif - -// HHKB has no ghost and no bounce. -#ifdef MATRIX_HAS_GHOST -static bool matrix_has_ghost_in_row(uint8_t row); -#endif - - -// Matrix I/O ports -// -// row: HC4051[A,B,C] selects scan row0-7 -// col: LS145[A,B,C,D] selects scan col0-7 and enable(D) -// key: on: 0/off: 1 -// prev: unknown: output previous key state(negated)? - -#ifdef HOST_PJRC -// Ports for Teensy -// row: PB0-2 -// col: PB3-5,6 -// key: PE6(pull-uped) -// prev: PE7 -#define KEY_INIT() do { \ - DDRB |= 0x7F; \ - DDRE |= (1<<7); \ - DDRE &= ~(1<<6); \ - PORTE |= (1<<6); \ -} while (0) -#define KEY_SELECT(ROW, COL) (PORTB = (PORTB & 0xC0) | \ - (((COL) & 0x07)<<3) | \ - ((ROW) & 0x07)) -#define KEY_ENABLE() (PORTB &= ~(1<<6)) -#define KEY_UNABLE() (PORTB |= (1<<6)) -#define KEY_STATE() (PINE & (1<<6)) -#define KEY_PREV_ON() (PORTE |= (1<<7)) -#define KEY_PREV_OFF() (PORTE &= ~(1<<7)) -#define KEY_POWER_ON() -#define KEY_POWER_OFF() -#else -// Ports for V-USB -// key: PB0(pull-uped) -// prev: PB1 -// row: PB2-4 -// col: PC0-2,3 -// power: PB5(Low:on/Hi-z:off) -#define KEY_INIT() do { \ - DDRB |= 0x3E; \ - DDRB &= ~(1<<0); \ - PORTB |= 1<<0; \ - DDRC |= 0x0F; \ - KEY_UNABLE(); \ - KEY_PREV_OFF(); \ -} while (0) -#define KEY_SELECT(ROW, COL) do { \ - PORTB = (PORTB & 0xE3) | ((ROW) & 0x07)<<2; \ - PORTC = (PORTC & 0xF8) | ((COL) & 0x07); \ -} while (0) -#define KEY_ENABLE() (PORTC &= ~(1<<3)) -#define KEY_UNABLE() (PORTC |= (1<<3)) -#define KEY_STATE() (PINB & (1<<0)) -#define KEY_PREV_ON() (PORTB |= (1<<1)) -#define KEY_PREV_OFF() (PORTB &= ~(1<<1)) -// Power supply switching -#define KEY_POWER_ON() do { \ - KEY_INIT(); \ - PORTB &= ~(1<<5); \ - _delay_us(200); \ -} while (0) -#define KEY_POWER_OFF() do { \ - DDRB &= ~0x3F; \ - PORTB &= ~0x3F; \ - DDRC &= ~0x0F; \ - PORTC &= ~0x0F; \ -} while (0) -#endif - - -inline -uint8_t matrix_rows(void) -{ - return MATRIX_ROWS; -} - -inline -uint8_t matrix_cols(void) -{ - return MATRIX_COLS; -} - -void matrix_init(void) -{ - KEY_INIT(); - - // 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_prev = _matrix1; -} - -uint8_t matrix_scan(void) -{ - uint8_t *tmp; - - tmp = matrix_prev; - matrix_prev = matrix; - matrix = tmp; - - KEY_POWER_ON(); - for (uint8_t row = 0; row < MATRIX_ROWS; row++) { - for (uint8_t col = 0; col < MATRIX_COLS; col++) { - KEY_SELECT(row, col); - _delay_us(40); - - // Not sure this is needed. This just emulates HHKB controller's behaviour. - if (matrix_prev[row] & (1<<col)) { - KEY_PREV_ON(); - } - _delay_us(7); - - // NOTE: KEY_STATE is valid only in 20us after KEY_ENABLE. - // If V-USB interrupts in this section we could lose 40us or so - // and would read invalid value from KEY_STATE. - uint8_t last = TIMER_RAW; - - KEY_ENABLE(); - // Wait for KEY_STATE outputs its value. - // 1us was ok on one HHKB, but not worked on another. - _delay_us(10); - if (KEY_STATE()) { - matrix[row] &= ~(1<<col); - } else { - matrix[row] |= (1<<col); - } - - // Ignore if this code region execution time elapses more than 20us. - if (TIMER_DIFF_RAW(TIMER_RAW, last) > 20/(1000000/TIMER_RAW_FREQ)) { - matrix[row] = matrix_prev[row]; - } - - KEY_PREV_OFF(); - KEY_UNABLE(); - // NOTE: KEY_STATE keep its state in 20us after KEY_ENABLE. - // This takes 25us or more to make sure KEY_STATE returns to idle state. - _delay_us(150); - } - } - KEY_POWER_OFF(); - return 1; -} - -bool matrix_is_modified(void) -{ - for (uint8_t i = 0; i < MATRIX_ROWS; i++) { - if (matrix[i] != matrix_prev[i]) - return true; - } - return false; -} - -inline -bool matrix_has_ghost(void) -{ -#ifdef MATRIX_HAS_GHOST - for (uint8_t i = 0; i < MATRIX_ROWS; i++) { - if (matrix_has_ghost_in_row(i)) - return true; - } -#endif - return false; -} - -inline -bool matrix_is_on(uint8_t row, uint8_t col) -{ - return (matrix[row] & (1<<col)); -} - -inline -#if (MATRIX_COLS <= 8) -uint8_t matrix_get_row(uint8_t row) -#else -uint16_t matrix_get_row(uint8_t row) -#endif -{ - return matrix[row]; -} - -void matrix_print(void) -{ -#if (MATRIX_COLS <= 8) - print("\nr/c 01234567\n"); -#else - print("\nr/c 0123456789ABCDEF\n"); -#endif - for (uint8_t row = 0; row < matrix_rows(); row++) { - phex(row); print(": "); -#if (MATRIX_COLS <= 8) - pbin_reverse(matrix_get_row(row)); -#else - pbin_reverse16(matrix_get_row(row)); -#endif -#ifdef MATRIX_HAS_GHOST - if (matrix_has_ghost_in_row(row)) { - print(" <ghost"); - } -#endif - print("\n"); - } -} - -uint8_t matrix_key_count(void) -{ - uint8_t count = 0; - for (uint8_t i = 0; i < MATRIX_ROWS; i++) { -#if (MATRIX_COLS <= 8) - count += bitpop(matrix[i]); -#else - count += bitpop16(matrix[i]); -#endif - } - return count; -} - -#ifdef MATRIX_HAS_GHOST -inline -static bool matrix_has_ghost_in_row(uint8_t row) -{ - // no ghost exists in case less than 2 keys on - if (((matrix[row] - 1) & matrix[row]) == 0) - return false; - - // ghost exists in case same state as other row - for (uint8_t i=0; i < MATRIX_ROWS; i++) { - if (i != row && (matrix[i] & matrix[row]) == matrix[row]) - return true; - } - return false; -} -#endif |