From 25713dc2225556b20101347580146f9820d5e831 Mon Sep 17 00:00:00 2001 From: Chad Austin Date: Sun, 26 Dec 2021 18:44:56 -0800 Subject: Add sym_defer_pr debouncer type (#14948) --- quantum/debounce/sym_defer_pr.c | 72 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 72 insertions(+) create mode 100644 quantum/debounce/sym_defer_pr.c (limited to 'quantum/debounce/sym_defer_pr.c') diff --git a/quantum/debounce/sym_defer_pr.c b/quantum/debounce/sym_defer_pr.c new file mode 100644 index 0000000000..8b33acc6a2 --- /dev/null +++ b/quantum/debounce/sym_defer_pr.c @@ -0,0 +1,72 @@ +/* +Copyright 2021 Chad Austin +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 . +*/ + +/* +Symmetric per-row debounce algorithm. Changes only apply when +DEBOUNCE milliseconds have elapsed since the last change. +*/ + +#include "matrix.h" +#include "timer.h" +#include "quantum.h" +#include + +#ifndef DEBOUNCE +# define DEBOUNCE 5 +#endif + +static uint16_t last_time; +// [row] milliseconds until key's state is considered debounced. +static uint8_t* countdowns; +// [row] +static matrix_row_t* last_raw; + +void 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 debounce_free(void) { + free(countdowns); + countdowns = NULL; + free(last_raw); + last_raw = NULL; +} + +void 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; + + 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; + last_raw[row] = raw_row; + } else if (*countdown > elapsed) { + *countdown -= elapsed; + } else if (*countdown) { + cooked[row] = raw_row; + *countdown = 0; + } + } +} + +bool debounce_active(void) { return true; } -- cgit v1.2.3