mirror of
https://github.com/qmk/qmk_firmware.git
synced 2024-11-23 20:03:01 +00:00
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
69 lines
2.6 KiB
C
69 lines
2.6 KiB
C
/*
|
|
Copyright 2011 Jun Wako <wakojun@gmail.com>
|
|
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
|
|
|
|
#if __has_include_next("_timer.h")
|
|
# include_next "_timer.h" /* Include the platform's _timer.h */
|
|
#endif
|
|
|
|
#include <stdint.h>
|
|
#include <stdbool.h>
|
|
|
|
#define TIMER_DIFF(a, b, max) ((max == UINT8_MAX) ? ((uint8_t)((a) - (b))) : ((max == UINT16_MAX) ? ((uint16_t)((a) - (b))) : ((max == UINT32_MAX) ? ((uint32_t)((a) - (b))) : ((a) >= (b) ? (a) - (b) : (max) + 1 - (b) + (a)))))
|
|
#define TIMER_DIFF_8(a, b) TIMER_DIFF(a, b, UINT8_MAX)
|
|
#define TIMER_DIFF_16(a, b) TIMER_DIFF(a, b, UINT16_MAX)
|
|
#define TIMER_DIFF_32(a, b) TIMER_DIFF(a, b, UINT32_MAX)
|
|
#define TIMER_DIFF_RAW(a, b) TIMER_DIFF_8(a, b)
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
extern volatile uint32_t timer_count;
|
|
|
|
void timer_init(void);
|
|
void timer_clear(void);
|
|
uint16_t timer_read(void);
|
|
uint32_t timer_read32(void);
|
|
uint16_t timer_elapsed(uint16_t last);
|
|
uint32_t timer_elapsed32(uint32_t last);
|
|
|
|
// Utility functions to check if a future time has expired & autmatically handle time wrapping if checked / reset frequently (half of max value)
|
|
#define timer_expired(current, future) ((uint16_t)(current - future) < UINT16_MAX / 2)
|
|
#define timer_expired32(current, future) ((uint32_t)(current - future) < UINT32_MAX / 2)
|
|
|
|
// Use an appropriate timer integer size based on architecture (16-bit will overflow sooner)
|
|
#if FAST_TIMER_T_SIZE < 32
|
|
# define TIMER_DIFF_FAST(a, b) TIMER_DIFF_16(a, b)
|
|
# define timer_expired_fast(current, future) timer_expired(current, future)
|
|
typedef uint16_t fast_timer_t;
|
|
fast_timer_t inline timer_read_fast(void) { return timer_read(); }
|
|
fast_timer_t inline timer_elapsed_fast(fast_timer_t last) { return timer_elapsed(last); }
|
|
#else
|
|
# define TIMER_DIFF_FAST(a, b) TIMER_DIFF_32(a, b)
|
|
# define timer_expired_fast(current, future) timer_expired32(current, future)
|
|
typedef uint32_t fast_timer_t;
|
|
fast_timer_t inline timer_read_fast(void) { return timer_read32(); }
|
|
fast_timer_t inline timer_elapsed_fast(fast_timer_t last) { return timer_elapsed32(last); }
|
|
#endif
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|