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-rw-r--r--keyboards/jj40/matrix.c112
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diff --git a/keyboards/jj40/matrix.c b/keyboards/jj40/matrix.c
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--- a/keyboards/jj40/matrix.c
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-/*
-Copyright 2017 Luiz Ribeiro <luizribeiro@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 <avr/io.h>
-#include <util/delay.h>
-
-#include "matrix.h"
-
-#ifndef DEBOUNCE
-# define DEBOUNCE 5
-#endif
-
-static uint8_t debouncing = DEBOUNCE;
-
-static matrix_row_t matrix[MATRIX_ROWS];
-static matrix_row_t matrix_debouncing[MATRIX_ROWS];
-
-void matrix_set_row_status(uint8_t row);
-uint8_t bit_reverse(uint8_t x);
-
-void matrix_init(void) {
- // all outputs for rows high
- DDRB = 0xFF;
- PORTB = 0xFF;
- // all inputs for columns
- DDRA = 0x00;
- DDRC &= ~(0x111111<<2);
- DDRD &= ~(1<<PIND7);
- // all columns are pulled-up
- PORTA = 0xFF;
- PORTC |= (0b111111<<2);
- PORTD |= (1<<PIND7);
-
- // initialize matrix state: all keys off
- for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
- matrix[row] = 0x00;
- matrix_debouncing[row] = 0x00;
- }
-
- matrix_init_quantum();
-}
-
-uint8_t matrix_scan(void) {
- for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
- matrix_set_row_status(row);
- _delay_us(5);
-
- matrix_row_t cols = (
- // cols 0..7, PORTA 0 -> 7
- (~PINA) & 0xFF
- ) | (
- // cols 8..13, PORTC 7 -> 0
- bit_reverse((~PINC) & 0xFF) << 8
- ) | (
- // col 14, PORTD 7
- ((~PIND) & (1 << PIND7)) << 7
- );
-
- if (matrix_debouncing[row] != cols) {
- matrix_debouncing[row] = cols;
- debouncing = DEBOUNCE;
- }
- }
-
- if (debouncing) {
- if (--debouncing) {
- _delay_ms(1);
- } else {
- for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
- matrix[i] = matrix_debouncing[i];
- }
- }
- }
-
- matrix_scan_quantum();
-
- return 1;
-}
-
-// declarations
-void matrix_set_row_status(uint8_t row) {
- DDRB = (1 << row);
- PORTB = ~(1 << row);
-}
-
-uint8_t bit_reverse(uint8_t x) {
- x = ((x >> 1) & 0x55) | ((x << 1) & 0xaa);
- x = ((x >> 2) & 0x33) | ((x << 2) & 0xcc);
- x = ((x >> 4) & 0x0f) | ((x << 4) & 0xf0);
- return x;
-}
-
-inline matrix_row_t matrix_get_row(uint8_t row) {
- return matrix[row];
-}
-
-void matrix_print(void) {
-}