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270 lines
5.6 KiB
270 lines
5.6 KiB
/*
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Copyright 2012 Jun Wako <wakojun@gmail.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdint.h>
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#include <stdbool.h>
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#include <avr/io.h>
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#include <util/delay.h>
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#include "print.h"
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#include "debug.h"
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#include "util.h"
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#include "matrix.h"
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/*
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* Happy Buckling Keyboard(IBM Model M mod)
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*
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* Pin usage:
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* COL: PD0-7
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* ROW: PB0-7, PF4-7
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*/
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#if (MATRIX_COLS > 16)
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# error "MATRIX_COLS must not exceed 16"
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#endif
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#if (MATRIX_ROWS > 255)
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# error "MATRIX_ROWS must not exceed 255"
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#endif
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#ifndef DEBOUNCE
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# define DEBOUNCE 0
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#endif
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static uint8_t debouncing = DEBOUNCE;
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// matrix state buffer(1:on, 0:off)
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#if (MATRIX_COLS <= 8)
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static uint8_t *matrix;
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static uint8_t *matrix_prev;
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static uint8_t _matrix0[MATRIX_ROWS];
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static uint8_t _matrix1[MATRIX_ROWS];
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#else
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static uint16_t *matrix;
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static uint16_t *matrix_prev;
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static uint16_t _matrix0[MATRIX_ROWS];
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static uint16_t _matrix1[MATRIX_ROWS];
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#endif
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#ifdef MATRIX_HAS_GHOST
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static bool matrix_has_ghost_in_row(uint8_t row);
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#endif
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static uint8_t read_col(void);
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static void unselect_rows(void);
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static void select_row(uint8_t row);
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inline
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uint8_t matrix_rows(void)
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{
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return MATRIX_ROWS;
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}
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inline
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uint8_t matrix_cols(void)
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{
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return MATRIX_COLS;
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}
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void matrix_init(void)
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{
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print_enable = true;
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debug_enable = true;
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debug_matrix = true;
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debug_keyboard = false;
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debug_mouse = false;
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print("debug enabled.\n");
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// JTAG disable for PORT F. write JTD bit twice within four cycles.
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MCUCR |= (1<<JTD);
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MCUCR |= (1<<JTD);
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// initialize rows
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unselect_rows();
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// initialize columns to input with pull-up(DDR:0, PORT:1)
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DDRD = 0x00;
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PORTD = 0xFF;
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// initialize matrix state: all keys off
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for (uint8_t i=0; i < MATRIX_ROWS; i++) _matrix0[i] = 0x00;
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for (uint8_t i=0; i < MATRIX_ROWS; i++) _matrix1[i] = 0x00;
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matrix = _matrix0;
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matrix_prev = _matrix1;
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}
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uint8_t matrix_scan(void)
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{
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if (!debouncing) {
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uint8_t *tmp = matrix_prev;
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matrix_prev = matrix;
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matrix = tmp;
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}
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for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
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unselect_rows();
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select_row(i);
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_delay_us(30); // without this wait read unstable value.
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if (matrix[i] != (uint8_t)~read_col()) {
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matrix[i] = (uint8_t)~read_col();
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if (debouncing) {
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debug("bounce!: "); debug_hex(debouncing); print("\n");
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}
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_delay_ms(1); // TODO: work around. HAHAHAHAHAAHA
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debouncing = DEBOUNCE;
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}
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}
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unselect_rows();
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if (debouncing) {
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debouncing--;
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}
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return 1;
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}
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bool matrix_is_modified(void)
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{
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if (debouncing) return false;
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for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
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if (matrix[i] != matrix_prev[i]) {
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return true;
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}
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}
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return false;
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}
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inline
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bool matrix_has_ghost(void)
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{
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#ifdef MATRIX_HAS_GHOST
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for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
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if (matrix_has_ghost_in_row(i))
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return true;
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}
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#endif
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return false;
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}
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inline
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bool matrix_is_on(uint8_t row, uint8_t col)
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{
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return (matrix[row] & (1<<col));
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}
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inline
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#if (MATRIX_COLS <= 8)
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uint8_t matrix_get_row(uint8_t row)
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#else
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uint16_t matrix_get_row(uint8_t row)
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#endif
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{
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return matrix[row];
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}
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void matrix_print(void)
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{
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print("\nr/c 01234567\n");
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for (uint8_t row = 0; row < matrix_rows(); row++) {
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phex(row); print(": ");
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#if (MATRIX_COLS <= 8)
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pbin_reverse(matrix_get_row(row));
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#else
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pbin_reverse16(matrix_get_row(row));
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#endif
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#ifdef MATRIX_HAS_GHOST
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if (matrix_has_ghost_in_row(row)) {
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print(" <ghost");
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}
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#endif
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print("\n");
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}
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}
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uint8_t matrix_key_count(void)
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{
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uint8_t count = 0;
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for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
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#if (MATRIX_COLS <= 8)
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count += bitpop(matrix[i]);
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#else
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count += bitpop16(matrix[i]);
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#endif
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}
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return count;
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}
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#ifdef MATRIX_HAS_GHOST
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inline
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static bool matrix_has_ghost_in_row(uint8_t row)
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{
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// no ghost exists in case less than 2 keys on
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if (((matrix[row] - 1) & matrix[row]) == 0)
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return false;
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// ghost exists in case same state as other row
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for (uint8_t i=0; i < MATRIX_ROWS; i++) {
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if (i != row && (matrix[i] & matrix[row]) == matrix[row])
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return true;
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}
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return false;
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}
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#endif
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inline
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static uint8_t read_col(void)
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{
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return PIND;
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}
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inline
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static void unselect_rows(void)
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{
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// Hi-Z(DDR:0, PORT:0) to unselect
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DDRB &= ~0b11111111;
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PORTB &= ~0b11111111;
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DDRF &= ~0b11110000;
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PORTF &= ~0b11110000;
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}
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inline
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static void select_row(uint8_t row)
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{
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// Output low(DDR:1, PORT:0) to select
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switch (row) {
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case 0:
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case 1:
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case 2:
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case 3:
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case 4:
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case 5:
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case 6:
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case 7:
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DDRB |= (1<<row);
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PORTB &= ~(1<<row);
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break;
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case 8:
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DDRF |= (1<<4);
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PORTF &= ~(1<<4);
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break;
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case 9:
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case 10:
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case 11:
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DDRF |= (1<<(row-4));
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PORTF &= ~(1<<(row-4));
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break;
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}
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}
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