Ezri Brimhall
f513c31058
Some checks failed
Automatic Approve / automatic_approve (push) Has been cancelled
81 lines
2.4 KiB
C
81 lines
2.4 KiB
C
/*
|
|
Copyright 2021 Chad Austin <chad@chadaustin.me>
|
|
Copyright 2024 @ keychron (https://www.keychron.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/>.
|
|
*/
|
|
|
|
/*
|
|
Symmetric per-row debounce algorithm. Changes only apply when
|
|
DEBOUNCE milliseconds have elapsed since the last change.
|
|
*/
|
|
|
|
#include "debounce.h"
|
|
#include "timer.h"
|
|
#include <stdlib.h>
|
|
|
|
extern uint8_t debounce_time;
|
|
|
|
static uint16_t last_time;
|
|
// [row] milliseconds until key's state is considered debounced.
|
|
static uint8_t* countdowns = NULL;
|
|
// [row]
|
|
static matrix_row_t* last_raw = NULL;
|
|
|
|
void sym_defer_pr_debounce_init(uint8_t num_rows) {
|
|
countdowns = (uint8_t*)calloc(num_rows, sizeof(uint8_t));
|
|
last_raw = (matrix_row_t*)calloc(num_rows, sizeof(matrix_row_t));
|
|
last_time = timer_read();
|
|
}
|
|
|
|
void sym_defer_pr_debounce_free(void) {
|
|
if (countdowns != NULL) {
|
|
free(countdowns);
|
|
countdowns = NULL;
|
|
}
|
|
if (last_raw != NULL) {
|
|
free(last_raw);
|
|
last_raw = NULL;
|
|
}
|
|
}
|
|
|
|
bool sym_defer_pr_debounce(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, bool changed) {
|
|
uint16_t now = timer_read();
|
|
uint16_t elapsed16 = TIMER_DIFF_16(now, last_time);
|
|
last_time = now;
|
|
uint8_t elapsed = (elapsed16 > 255) ? 255 : elapsed16;
|
|
bool cooked_changed = false;
|
|
|
|
uint8_t* countdown = countdowns;
|
|
|
|
for (uint8_t row = 0; row < num_rows; ++row, ++countdown) {
|
|
matrix_row_t raw_row = raw[row];
|
|
|
|
if (raw_row != last_raw[row]) {
|
|
*countdown = debounce_time;
|
|
last_raw[row] = raw_row;
|
|
} else if (*countdown > elapsed) {
|
|
*countdown -= elapsed;
|
|
} else if (*countdown) {
|
|
cooked_changed |= cooked[row] ^ raw_row;
|
|
cooked[row] = raw_row;
|
|
*countdown = 0;
|
|
}
|
|
}
|
|
|
|
return cooked_changed;
|
|
}
|
|
|
|
bool debounce_active(void) {
|
|
return true;
|
|
}
|