diff options
Diffstat (limited to 'tmk_core/common/debounce/debounce_sym_g.c')
-rw-r--r-- | tmk_core/common/debounce/debounce_sym_g.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/tmk_core/common/debounce/debounce_sym_g.c b/tmk_core/common/debounce/debounce_sym_g.c new file mode 100644 index 000000000..2fb7a589d --- /dev/null +++ b/tmk_core/common/debounce/debounce_sym_g.c @@ -0,0 +1,59 @@ +/* +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]; +} |