|
@@ -1,112 +0,0 @@
|
|
|
-/*
|
|
|
-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) {
|
|
|
-}
|