/* 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 "matrix.h" #include "timer.h" #include "quantum.h" #ifndef DEBOUNCE # define DEBOUNCE 5 #endif void debounce_init(uint8_t num_rows) {} static bool debouncing = false; #if DEBOUNCE > 0 static uint16_t debouncing_time; void debounce(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, bool changed) { if (changed) { debouncing = true; debouncing_time = timer_read(); } if (debouncing && timer_elapsed(debouncing_time) > DEBOUNCE) { for (int i = 0; i < num_rows; i++) { cooked[i] = raw[i]; } debouncing = false; } } #else // no debouncing. void debounce(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, bool changed) { for (int i = 0; i < num_rows; i++) { cooked[i] = raw[i]; } } #endif bool debounce_active(void) { return debouncing; }