mirror of
https://github.com/qmk/qmk_firmware.git
synced 2024-11-29 22:45:51 +00:00
61 lines
1.8 KiB
C
61 lines
1.8 KiB
C
/*
|
|
Copyright 2017 Alex Ong<the.onga@gmail.com>
|
|
Copyright 2021 Simon Arlott
|
|
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/>.
|
|
*/
|
|
|
|
/*
|
|
Basic global debounce algorithm. Used in 99% of keyboards at time of implementation
|
|
When no state changes have occured for DEBOUNCE milliseconds, we push the state.
|
|
*/
|
|
#include "debounce.h"
|
|
#include "timer.h"
|
|
#include <string.h>
|
|
#ifndef DEBOUNCE
|
|
# define DEBOUNCE 5
|
|
#endif
|
|
|
|
// Maximum debounce: 255ms
|
|
#if DEBOUNCE > UINT8_MAX
|
|
# undef DEBOUNCE
|
|
# define DEBOUNCE UINT8_MAX
|
|
#endif
|
|
|
|
#if DEBOUNCE > 0
|
|
static bool debouncing = false;
|
|
static fast_timer_t debouncing_time;
|
|
|
|
void debounce_init(uint8_t num_rows) {}
|
|
|
|
bool debounce(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, bool changed) {
|
|
bool cooked_changed = false;
|
|
|
|
if (changed) {
|
|
debouncing = true;
|
|
debouncing_time = timer_read_fast();
|
|
} else if (debouncing && timer_elapsed_fast(debouncing_time) >= DEBOUNCE) {
|
|
size_t matrix_size = num_rows * sizeof(matrix_row_t);
|
|
if (memcmp(cooked, raw, matrix_size) != 0) {
|
|
memcpy(cooked, raw, matrix_size);
|
|
cooked_changed = true;
|
|
}
|
|
debouncing = false;
|
|
}
|
|
|
|
return cooked_changed;
|
|
}
|
|
|
|
void debounce_free(void) {}
|
|
#else // no debouncing.
|
|
# include "none.c"
|
|
#endif
|