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Debounce refactor / API (#3720)

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* Added xeal60 via clone of lets split

* Delete removed other keymaps

* Basic keymap (no FN). Compiles.

* Removed NP_STAR and NP_SLSH.

* Removed "debounce_algo = manual" in all keyboards with CUSTOM_MATRIX = yes.

* Changed order of rules in TMK. Documented feature.

* Fixed missing whitespace in debounce documentation

Table wasn't working due to missing newline.

* Added bold in a few areas.

* DO NOT USE - Removed debounce from TMK.

* Remove accidental xeal60 commit

* DO NOT USE - debounce successfully compiled.

* DO NOT USE Revert back to original API to support split_keyboards.

* Working eager_pk

* Whitespace cleanup.

* Restored debounce.h since there wasnt any real change.

* Moved debouncing_time variable  to inside #if debounce

* Removed check for custom_matrix. We can safely include the debounce file for compilation when custom_matrix is used.

* Removed #include "matrix.h" from debounce.h

* Bug fix - was using MATRIX_ROWS instead of num_rows

* Fixed compilation error with debounce_sym_g

* Renamed DEBOUNCE_ALGO to DEBOUNCE_TYPE

* Malloc array in debounce_eager_pk, since split keyboards only use MATRIX_ROWS/2.

* Fix compile error in debounce_eager_pk

* Stricter, leaner DEBOUNCE_TYPE section in common_features.mk. Cleanup debounce_type.mk
This commit is contained in:
Drashna Jael're 2019-02-14 20:36:20 -08:00 • committed by GitHub
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10 changed files with 272 additions and 100 deletions
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52
quantum/debounce.c
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@ -1,52 +0,0 @@
#include "matrix.h"
#include "timer.h"
#include "quantum.h"
#ifndef DEBOUNCING_DELAY
# define DEBOUNCING_DELAY 5
#endif
void debounce_init(uint8_t num_rows) {
}
#if DEBOUNCING_DELAY > 0
static bool debouncing = false;
void debounce(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, bool changed) {
static uint16_t debouncing_time;
if (changed) {
debouncing = true;
debouncing_time = timer_read();
}
if (debouncing && (timer_elapsed(debouncing_time) > DEBOUNCING_DELAY)) {
for (uint8_t i = 0; i < num_rows; i++) {
cooked[i] = raw[i];
}
debouncing = false;
}
}
bool debounce_active(void) {
return debouncing;
}
#else
// no debounce
void debounce(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, bool changed) {
if (changed)
{
for (uint8_t i = 0; i < num_rows; i++) {
cooked[i] = raw[i];
}
}
}
bool debounce_active(void) {
return false;
}
#endif

2
quantum/debounce.h
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@ -8,4 +8,4 @@ void debounce(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, bool
bool debounce_active(void);
void debounce_init(uint8_t num_rows);
void debounce_init(uint8_t num_rows);

121
quantum/debounce/debounce_eager_pk.c Normal file
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@ -0,0 +1,121 @@
/*
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 per-key algorithm. Uses an 8-bit counter per key.
After pressing a key, it immediately changes state, and sets a counter.
No further inputs are accepted until DEBOUNCE milliseconds have occurred.
*/
#include "matrix.h"
#include "timer.h"
#include "quantum.h"
#include <stdlib.h>
#ifndef DEBOUNCE
#define DEBOUNCE 5
#endif
#if (MATRIX_COLS <= 8)
# define ROW_SHIFTER ((uint8_t)1)
#elif (MATRIX_COLS <= 16)
# define ROW_SHIFTER ((uint16_t)1)
#elif (MATRIX_COLS <= 32)
# define ROW_SHIFTER ((uint32_t)1)
#endif
#define debounce_counter_t uint8_t
static debounce_counter_t *debounce_counters;
#define DEBOUNCE_ELAPSED 251
#define MAX_DEBOUNCE (DEBOUNCE_ELAPSED - 1)
void update_debounce_counters(uint8_t num_rows, uint8_t current_time);
void transfer_matrix_values(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, uint8_t current_time);
//we use num_rows rather than MATRIX_ROWS to support split keyboards
void debounce_init(uint8_t num_rows)
{
debounce_counters = (debounce_counter_t*)malloc(num_rows*MATRIX_COLS * sizeof(debounce_counter_t));
int i = 0;
for (uint8_t r = 0; r < num_rows; r++)
{
for (uint8_t c = 0; c < MATRIX_COLS; c++)
{
debounce_counters[i++] = DEBOUNCE_ELAPSED;
}
}
}
void debounce(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, bool changed)
{
uint8_t current_time = timer_read() % MAX_DEBOUNCE;
update_debounce_counters(num_rows, current_time);
transfer_matrix_values(raw, cooked, num_rows, current_time);
}
//If the current time is > debounce counter, set the counter to enable input.
void update_debounce_counters(uint8_t num_rows, uint8_t current_time)
{
debounce_counter_t *debounce_pointer = debounce_counters;
for (uint8_t row = 0; row < num_rows; row++)
{
for (uint8_t col = 0; col < MATRIX_COLS; col++)
{
if (*debounce_pointer != DEBOUNCE_ELAPSED)
{
if (TIMER_DIFF(current_time, *debounce_pointer, MAX_DEBOUNCE) >= DEBOUNCE) {
*debounce_pointer = DEBOUNCE_ELAPSED;
}
}
debounce_pointer++;
}
}
}
// upload from raw_matrix to final matrix;
void transfer_matrix_values(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, uint8_t current_time)
{
debounce_counter_t *debounce_pointer = debounce_counters;
for (uint8_t row = 0; row < num_rows; row++)
{
matrix_row_t existing_row = cooked[row];
matrix_row_t raw_row = raw[row];
for (uint8_t col = 0; col < MATRIX_COLS; col++)
{
matrix_row_t col_mask = (ROW_SHIFTER << col);
bool final_value = raw_row & col_mask;
bool existing_value = existing_row & col_mask;
if (*debounce_pointer == DEBOUNCE_ELAPSED &&
(existing_value != final_value))
{
*debounce_pointer = current_time;
existing_row ^= col_mask; //flip the bit.
}
debounce_pointer++;
}
cooked[row] = existing_row;
}
}
bool debounce_active(void)
{
return true;
}

57
quantum/debounce/debounce_sym_g.c Normal file
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@ -0,0 +1,57 @@
/*
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 "matrix.h"
#include "timer.h"
#include "quantum.h"
#ifndef DEBOUNCE
#define DEBOUNCE 5
#endif
void debounce_init(uint8_t num_rows) {}
static bool debouncing = false;
#if DEBOUNCE > 0
static uint16_t debouncing_time;
void debounce(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, bool changed)
{
if (changed) {
debouncing = true;
debouncing_time = timer_read();
}
if (debouncing && timer_elapsed(debouncing_time) > DEBOUNCE) {
for (int i = 0; i < num_rows; i++) {
cooked[i] = raw[i];
}
debouncing = false;
}
}
#else //no debouncing.
void debounce(matrix_row_t raw[], matrix_row_t cooked[], uint8_t num_rows, bool changed)
{
for (int i = 0; i < num_rows; i++) {
cooked[i] = raw[i];
}
}
#endif
bool debounce_active(void) {
return debouncing;
}

28
quantum/debounce/readme.md Normal file
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@ -0,0 +1,28 @@
Debounce algorithms belong in this folder.
Here are a few ideas
1) Global vs Per-Key vs Per-Row
* Global - one timer for all keys. Any key change state affects global timer
* Per key - one timer per key
* Per row - one timer per row
2) Eager vs symmetric vs assymetric
* Eager - any key change is reported immediately. All further inputs for DEBOUNCE ms are ignored.
* Symmetric - wait for no changes for DEBOUNCE ms before reporting change
* Assymetric - wait for different times depending on key-down/key-up. E.g. Eager key-down, DEBOUNCE ms key up.
3) Timestamp vs cycles
* old old old code waits n cycles, decreasing count by one each matrix_scan
* newer code stores the millisecond the change occurred, and does subraction to figure out time elapsed.
* Timestamps are superior, i don't think cycles will ever be used again once upgraded.
The default algorithm is symmetric and global.
Here are a few that could be implemented:
debounce_sym_g.c
debounce_sym_pk.c
debounce_sym_pr.c
debounce_sym_pr_cycles.c //currently used in ergo-dox
debounce_eager_g.c
debounce_eager_pk.c
debounce_eager_pr.c //could be used in ergo-dox!

31
quantum/matrix.c
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@ -51,10 +51,8 @@ static const pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
#endif
/* matrix state(1:on, 0:off) */
static matrix_row_t raw_matrix[MATRIX_ROWS];
static matrix_row_t matrix[MATRIX_ROWS];
static matrix_row_t raw_matrix[MATRIX_ROWS]; //raw values
static matrix_row_t matrix[MATRIX_ROWS]; //debounced values
#if (DIODE_DIRECTION == COL2ROW)
static void init_cols(void);
@ -108,30 +106,6 @@ uint8_t matrix_cols(void) {
return MATRIX_COLS;
}
// void matrix_power_up(void) {
// #if (DIODE_DIRECTION == COL2ROW)
// for (int8_t r = MATRIX_ROWS - 1; r >= 0; --r) {
// /* DDRxn */
// _SFR_IO8((row_pins[r] >> 4) + 1) |= _BV(row_pins[r] & 0xF);
// toggle_row(r);
// }
// for (int8_t c = MATRIX_COLS - 1; c >= 0; --c) {
// /* PORTxn */
// _SFR_IO8((col_pins[c] >> 4) + 2) |= _BV(col_pins[c] & 0xF);
// }
// #elif (DIODE_DIRECTION == ROW2COL)
// for (int8_t c = MATRIX_COLS - 1; c >= 0; --c) {
// /* DDRxn */
// _SFR_IO8((col_pins[c] >> 4) + 1) |= _BV(col_pins[c] & 0xF);
// toggle_col(c);
// }
// for (int8_t r = MATRIX_ROWS - 1; r >= 0; --r) {
// /* PORTxn */
// _SFR_IO8((row_pins[r] >> 4) + 2) |= _BV(row_pins[r] & 0xF);
// }
// #endif
// }
void matrix_init(void) {
// initialize row and col
@ -175,6 +149,7 @@ uint8_t matrix_scan(void)
return 1;
}
//Deprecated.
bool matrix_is_modified(void)
{
if (debounce_active()) return false;