60 lines
1.6 KiB
C
60 lines
1.6 KiB
C
/*
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Copyright 2017 Alex Ong<the.onga@gmail.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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Basic global debounce algorithm. Used in 99% of keyboards at time of implementation
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When no state changes have occured for DEBOUNCE milliseconds, we push the state.
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*/
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#include "debounce.h"
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#include "matrix.h"
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#include "timer.h"
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#ifndef DEBOUNCE
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#define DEBOUNCE 5
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#endif
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static matrix_row_t matrix_debounced[MATRIX_ROWS];
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static bool debouncing = false;
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static uint16_t debouncing_time;
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void matrix_debounce_init(void)
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{
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for (uint8_t r = 0; r < MATRIX_ROWS; r++)
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{
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matrix_debounced[r] = 0;
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}
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}
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void matrix_debounce(void)
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{
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for (uint8_t r = 0; r < MATRIX_ROWS; r++)
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{
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matrix_row_t raw = matrix_get_row(r);
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if (raw != matrix_debounced[r])
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{
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debouncing = true;
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debouncing_time = timer_read();
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}
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}
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if (debouncing && timer_elapsed(debouncing_time) > DEBOUNCE) {
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for (int i = 0; i < MATRIX_ROWS; i++) {
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matrix_debounced[i] = matrix_get_row(i);
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}
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debouncing = false;
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}
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}
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matrix_row_t matrix_debounce_get_row(uint8_t row)
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{
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return matrix_debounced[row];
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}
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