2 Copyright 2017 Luiz Ribeiro <luizribeiro@gmail.com>
3 Modified 2018 by Wayne K Jones <github.com/WarmCatUK>
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation, either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 #include <util/delay.h>
28 static uint8_t debouncing = DEBOUNCE;
30 static matrix_row_t matrix[MATRIX_ROWS];
31 static matrix_row_t matrix_debouncing[MATRIX_ROWS];
33 void matrix_init(void) {
34 // all outputs for rows high
37 // all inputs for columns
39 DDRC &= ~(0x111111<<2);
41 // all columns are pulled-up
43 PORTC |= (0b111111<<2);
46 // initialize matrix state: all keys off
47 for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
49 matrix_debouncing[row] = 0x00;
51 matrix_init_quantum(); // missing from original port by Luiz
54 void matrix_set_row_status(uint8_t row) {
59 uint8_t bit_reverse(uint8_t x) {
60 x = ((x >> 1) & 0x55) | ((x << 1) & 0xaa);
61 x = ((x >> 2) & 0x33) | ((x << 2) & 0xcc);
62 x = ((x >> 4) & 0x0f) | ((x << 4) & 0xf0);
66 uint8_t matrix_scan(void) {
67 for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
68 matrix_set_row_status(row);
72 // cols 0..7, PORTA 0 -> 7
75 // cols 8..13, PORTC 7 -> 0
76 bit_reverse((~PINC) & 0xFF) << 8
79 ((~PIND) & (1 << PIND7)) << 7
82 if (matrix_debouncing[row] != cols) {
83 matrix_debouncing[row] = cols;
84 debouncing = DEBOUNCE;
92 for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
93 matrix[i] = matrix_debouncing[i];
97 matrix_scan_quantum(); // also missing in original PS2AVRGB implementation
103 inline matrix_row_t matrix_get_row(uint8_t row) {
107 void matrix_print(void) {