mirror of
https://github.com/qmk/qmk_firmware.git
synced 2024-12-21 09:03:23 +00:00
113 lines
2.7 KiB
C
113 lines
2.7 KiB
C
/*
|
|
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) {
|
|
}
|