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325 lines
7.6 KiB
325 lines
7.6 KiB
/*
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Copyright 2011 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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/*
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* scan matrix
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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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#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(uint8_t row);
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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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// initialize row and col
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unselect_rows();
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// Input with pull-up(DDR:0, PORT:1)
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// Column C1 ~ C7 (PortC0-6)
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// Column C0(Port E1)
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DDRC &= ~0b01111111;
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PORTC |= 0b01111111;
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DDRE &= ~0b00000010;
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PORTE |= 0b00000010;
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// modifier B3/4,F4/5,E4 always input
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DDRB |= 0b00011000;
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PORTB &= 0b00011000;
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DDRF |= ~0b00110000;
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PORTF &= 0b00110000;
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//DDRB &= ~0b00011000;
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//PORTB |= 0b00011000;
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//DDRF &= ~0b00110000;
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//PORTF |= 0b00110000;
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//DDRE &= ~0b00010000;
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//PORTE |= 0b00010000;
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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(i)) {
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matrix[i] = (uint8_t)~read_col(i);
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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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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(uint8_t row)
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{
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// For normal : Column C1 ~ C7 (PortC0-6), C0(Port E1)
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// For modifier : B3(CNTRL)/4(SHIFT),F4(CMD/GUI)/5(OPTION,ALT)
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// Modifier would be copied to report->mods except E4(CAPSLOCK)
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uint8_t tmp;
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if ( row == 10 ) {
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tmp = 0xF0;
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tmp |= (PINB >> 3 ) & 0b00000011; // LEFT CTRL is 0bit in modifier (HID Spec)
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// LEFT SHIFT is 1bit in modifier (HID Spec)
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tmp |= (PINF >> 3 ) & 0b00000100; // LEFT ALT is 2bit in modifier (HID Spec)
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tmp |= (PINF >> 1 ) & 0b00001000; // LEFT GUI is 3bit in modifier (HID Spec)
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//tmp |= (PINE << 1 ) & 0b00010000; // Caps Lock(Should not be in modifier
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} else {
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tmp = 0x00;
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tmp = (PINE >> 1)&0b00000001;
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tmp |= PINC << 1 ;
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}
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return tmp;
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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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// DDR : 1, output 0, input
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DDRB &= ~0b00000011; // PB: 1,0
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PORTB &= ~0b00000011;
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DDRD &= ~0b00010000; // PD: 4
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PORTD &= ~0b00010000;
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DDRE &= ~0b11000000; // PE: 7,6
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PORTE &= ~0b11000000;
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DDRF &= ~0b11000111; // PF: 7,6,2,1,0
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PORTF &= ~0b11000111;
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// to unselect virtual row(modifier), set port to output with low
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DDRB |= 0b00011000; // PB: 3,4 for modifier(row10)
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PORTB &= ~0b00011000;
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DDRF |= 0b00110000; // PF: 4,5 for modifier
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PORTF &= ~0b00110000;
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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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// with row enable, column could send low to AVR when pressed
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// row: 0 1 2 3 4 5 6 7 8 9
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// pin: PB1, PB0, PE7, PE6, PD4, PF2, PF0, PF1, PF6 PF7
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switch (row) {
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case 0:
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DDRB |= (1<<1);
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PORTB &= ~(1<<1);
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break;
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case 1:
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DDRB |= (1<<0);
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PORTB &= ~(1<<0);
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break;
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case 2:
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DDRE |= (1<<7);
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PORTE &= ~(1<<7);
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break;
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case 3:
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DDRE |= (1<<6);
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PORTE &= ~(1<<6);
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break;
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case 4:
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DDRD |= (1<<4);
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PORTD &= ~(1<<4);
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break;
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case 5:
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DDRF |= (1<<2);
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PORTF &= ~(1<<2);
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break;
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case 6:
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DDRF |= (1<<0);
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PORTF &= ~(1<<0);
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break;
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case 7:
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DDRF |= (1<<1);
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PORTF &= ~(1<<1);
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break;
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case 8:
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DDRF |= (1<<6);
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PORTF &= ~(1<<6);
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break;
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case 9:
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DDRF |= (1<<7);
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PORTF &= ~(1<<7);
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break;
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case 10:
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// modifier has no row enable
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// to select virtual row, set port as input
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DDRB &= ~0b00011000;
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PORTB |= 0b00011000;
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DDRF &= ~0b00110000;
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PORTF |= 0b00110000;
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break;
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}
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}
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