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| author | Simon Arlott <70171+nomis@users.noreply.github.com> | 2021-06-09 08:23:21 +0100 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2021-06-09 17:23:21 +1000 |
| commit | b829a1d2648abd0751e9d3505554547faf643425 (patch) | |
| tree | 35ba811a62feffd88759d0a53c1d6353d5d6d88a /tmk_core/common/avr | |
| parent | f287597c19dc926c7c28cefa32ffc3f0b4fdba7f (diff) | |
Avoid 8-bit timer overflows in debounce algorithms (#12240)
* 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
Diffstat (limited to 'tmk_core/common/avr')
| -rw-r--r-- | tmk_core/common/avr/_timer.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/tmk_core/common/avr/_timer.h b/tmk_core/common/avr/_timer.h new file mode 100644 index 0000000000..b81e0f68b7 --- /dev/null +++ b/tmk_core/common/avr/_timer.h @@ -0,0 +1,19 @@ +/* Copyright 2021 Simon Arlott + * + * 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/>. + */ +#pragma once + +// The platform is 8-bit, so prefer 16-bit timers to reduce code size +#define FAST_TIMER_T_SIZE 16 |