b829a1d264
* Add fast_timer_t that is 16-bit or 32-bit based on architecture A 16-bit timer will overflow sooner but be faster to compare on AVR. * Avoid 8-bit timer overflows in debounce algorithms Count down remaining elapsed time instead of trying to do 8-bit timer comparisons. Add a "none" implementation that is automatically used if DEBOUNCE is 0 otherwise it will break the _pk/_pr count down. * Avoid unnecessary polling of the entire matrix in sym_eager_pk The matrix only needs to be updated when a debounce timer expires. * Avoid unnecessary polling of the entire matrix in sym_eager_pr The matrix only needs to be updated when a debounce timer expires. The use of the "needed_update" variable is trying to do what "matrix_need_update" was added to fix but didn't work because it only applied when all keys finished debouncing. * Fix sym_defer_g timing inconsistency compared to other debounce algorithms DEBOUNCE=5 should process the key after 5ms, not 6ms * Add debounce tests
53 lines
1.6 KiB
C
53 lines
1.6 KiB
C
/*
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Copyright 2017 Alex Ong<the.onga@gmail.com>
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Copyright 2021 Simon Arlott
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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 "matrix.h"
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#include "timer.h"
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#include "quantum.h"
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#ifndef DEBOUNCE
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# define DEBOUNCE 5
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#endif
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#if DEBOUNCE > 0
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static bool debouncing = false;
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static fast_timer_t debouncing_time;
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void debounce_init(uint8_t num_rows) {}
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void debounce(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, bool changed) {
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if (changed) {
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debouncing = true;
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debouncing_time = timer_read_fast();
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}
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if (debouncing && timer_elapsed_fast(debouncing_time) >= DEBOUNCE) {
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for (int i = 0; i < num_rows; i++) {
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cooked[i] = raw[i];
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}
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debouncing = false;
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}
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}
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bool debounce_active(void) { return debouncing; }
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void debounce_free(void) {}
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#else // no debouncing.
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# include "none.c"
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#endif
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