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/*
Copyright 2017 Alex Ong<the.onga@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/>.
*/
/*
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 "matrix.h"
#include "timer.h"
#ifndef DEBOUNCE
#define DEBOUNCE 5
#endif
static matrix_row_t matrix_debounced[MATRIX_ROWS];
static bool debouncing = false;
static uint16_t debouncing_time;
void matrix_debounce_init(void)
{
for (uint8_t r = 0; r < MATRIX_ROWS; r++)
{
matrix_debounced[r] = 0;
}
}
void matrix_debounce(void)
{
for (uint8_t r = 0; r < MATRIX_ROWS; r++)
{
matrix_row_t raw = matrix_get_row(r);
if (raw != matrix_debounced[r])
{
debouncing = true;
debouncing_time = timer_read();
}
}
if (debouncing && timer_elapsed(debouncing_time) > DEBOUNCE) {
for (int i = 0; i < MATRIX_ROWS; i++) {
matrix_debounced[i] = matrix_get_row(i);
}
debouncing = false;
}
}
matrix_row_t matrix_debounce_get_row(uint8_t row)
{
return matrix_debounced[row];
}
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