~ruther/qmk_firmware

17e7762de7e3fdfc61c20aa61022f47370630c6a — Alex Ong 6 years ago e1e08a4
Eager Per Row Debouncing added (added to Ergodox) (#5498)

* Implemented Eager Per Row debouncing algorithm.

Good for when fingers can only press one row at a time (e.g. when keyboard is wired so that "rows" are vertical)

* Added documentation for eager_pr

* Ported ergodox_ez to eager_pr debouncing.

* Removed check for changes in matrix_scan.

* Added further clarification in docs.

* Accidental merge with ergodox_ez

* Small cleanup in eager_pr

* Forgot to debounce_init - this would probably cause seg-faults.
M docs/feature_debounce_type.md => docs/feature_debounce_type.md +4 -1
@@ 33,7 33,10 @@ The debounce code is compatible with split keyboards.
# Changing between included debouncing methods
You can either use your own code, by including your own debounce.c, or switch to another included one.
Included debounce methods are:
* eager_pk - debouncing per key. On any state change, response is immediate, followed by ```DEBOUNCE_DELAY``` millseconds of no further input for that key
* eager_pr - debouncing per row. On any state change, response is immediate, followed by locking the row ```DEBOUNCE_DELAY``` milliseconds of no further input for that row. 
For use in keyboards where refreshing ```NUM_KEYS``` 8-bit counters is computationally expensive / low scan rate, and fingers usually only hit one row at a time. This could be
appropriate for the ErgoDox models; the matrix is rotated 90°, and hence its "rows" are really columns, and each finger only hits a single "row" at a time in normal use.
* eager_pk - debouncing per key. On any state change, response is immediate, followed by ```DEBOUNCE_DELAY``` milliseconds of no further input for that key
* sym_g - debouncing per keyboard. On any state change, a global timer is set. When ```DEBOUNCE_DELAY``` milliseconds of no changes has occured, all input changes are pushed.



M keyboards/ergodox_ez/matrix.c => keyboards/ergodox_ez/matrix.c +196 -262
@@ 33,14 33,14 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
#include "debug.h"
#include "util.h"
#include "matrix.h"
#include "debounce.h"
#include QMK_KEYBOARD_H
#ifdef DEBUG_MATRIX_SCAN_RATE
#include  "timer.h"
#  include "timer.h"
#endif

/*
 * This constant define not debouncing time in msecs, but amount of matrix
 * scan loops which should be made to get stable debounced results.
 * This constant define not debouncing time in msecs, assuming eager_pr.
 *
 * On Ergodox matrix scan rate is relatively low, because of slow I2C.
 * Now it's only 317 scans/second, or about 3.15 msec/scan.


@@ 52,26 52,17 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef DEBOUNCE
#   define DEBOUNCE	5
#  define DEBOUNCE 5
#endif

/* matrix state(1:on, 0:off) */
static matrix_row_t matrix[MATRIX_ROWS];
/*
 * matrix state(1:on, 0:off)
 * contains the raw values without debounce filtering of the last read cycle.
 */
static matrix_row_t raw_matrix[MATRIX_ROWS];

// Debouncing: store for each key the number of scans until it's eligible to
// change.  When scanning the matrix, ignore any changes in keys that have
// already changed in the last DEBOUNCE scans.
static uint8_t debounce_matrix[MATRIX_ROWS * MATRIX_COLS];
static matrix_row_t raw_matrix[MATRIX_ROWS];  // raw values
static matrix_row_t matrix[MATRIX_ROWS];      // debounced values

static matrix_row_t read_cols(uint8_t row);
static void init_cols(void);
static void unselect_rows(void);
static void select_row(uint8_t row);
static void         init_cols(void);
static void         unselect_rows(void);
static void         select_row(uint8_t row);

static uint8_t mcp23018_reset_loop;
// static uint16_t mcp23018_reset_loop;


@@ 81,197 72,137 @@ uint32_t matrix_timer;
uint32_t matrix_scan_count;
#endif

__attribute__((weak)) void matrix_init_user(void) {}

__attribute__ ((weak))
void matrix_init_user(void) {}
__attribute__((weak)) void matrix_scan_user(void) {}

__attribute__ ((weak))
void matrix_scan_user(void) {}
__attribute__((weak)) void matrix_init_kb(void) { matrix_init_user(); }

__attribute__ ((weak))
void matrix_init_kb(void) {
  matrix_init_user();
}
__attribute__((weak)) void matrix_scan_kb(void) { matrix_scan_user(); }

__attribute__ ((weak))
void matrix_scan_kb(void) {
  matrix_scan_user();
}

inline
uint8_t matrix_rows(void)
{
    return MATRIX_ROWS;
}
inline uint8_t matrix_rows(void) { return MATRIX_ROWS; }

inline
uint8_t matrix_cols(void)
{
    return MATRIX_COLS;
}
inline uint8_t matrix_cols(void) { return MATRIX_COLS; }

void matrix_init(void)
{
    // initialize row and col
void matrix_init(void) {
  // initialize row and col

    mcp23018_status = init_mcp23018();
  mcp23018_status = init_mcp23018();

  unselect_rows();
  init_cols();

    unselect_rows();
    init_cols();

    // initialize matrix state: all keys off
    for (uint8_t i=0; i < MATRIX_ROWS; i++) {
        matrix[i] = 0;
        raw_matrix[i] = 0;
        for (uint8_t j=0; j < MATRIX_COLS; ++j) {
            debounce_matrix[i * MATRIX_COLS + j] = 0;
        }
    }
  // initialize matrix state: all keys off
  for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
    matrix[i]     = 0;
    raw_matrix[i] = 0;    
  }

#ifdef DEBUG_MATRIX_SCAN_RATE
    matrix_timer = timer_read32();
    matrix_scan_count = 0;
  matrix_timer      = timer_read32();
  matrix_scan_count = 0;
#endif

    matrix_init_quantum();

  debounce_init(MATRIX_ROWS);
  matrix_init_quantum();
}

void matrix_power_up(void) {
    mcp23018_status = init_mcp23018();
  mcp23018_status = init_mcp23018();

    unselect_rows();
    init_cols();
  unselect_rows();
  init_cols();

    // initialize matrix state: all keys off
    for (uint8_t i=0; i < MATRIX_ROWS; i++) {
        matrix[i] = 0;
    }
  // initialize matrix state: all keys off
  for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
    matrix[i] = 0;
  }

#ifdef DEBUG_MATRIX_SCAN_RATE
    matrix_timer = timer_read32();
    matrix_scan_count = 0;
  matrix_timer      = timer_read32();
  matrix_scan_count = 0;
#endif
}

// Returns a matrix_row_t whose bits are set if the corresponding key should be
// eligible to change in this scan.
matrix_row_t debounce_mask(matrix_row_t rawcols, uint8_t row) {
  matrix_row_t result = 0;
  matrix_row_t change = rawcols ^ raw_matrix[row];
  raw_matrix[row] = rawcols;
  for (uint8_t i = 0; i < MATRIX_COLS; ++i) {
    if (debounce_matrix[row * MATRIX_COLS + i]) {
      --debounce_matrix[row * MATRIX_COLS + i];
    } else {
      result |= (1 << i);
    }
    if (change & (1 << i)) {
      debounce_matrix[row * MATRIX_COLS + i] = DEBOUNCE;
uint8_t matrix_scan(void) {
  if (mcp23018_status) {  // if there was an error
    if (++mcp23018_reset_loop == 0) {
      // if (++mcp23018_reset_loop >= 1300) {
      // since mcp23018_reset_loop is 8 bit - we'll try to reset once in 255 matrix scans
      // this will be approx bit more frequent than once per second
      print("trying to reset mcp23018\n");
      mcp23018_status = init_mcp23018();
      if (mcp23018_status) {
        print("left side not responding\n");
      } else {
        print("left side attached\n");
        ergodox_blink_all_leds();
      }
    }
  }
  return result;
}

matrix_row_t debounce_read_cols(uint8_t row) {
  // Read the row without debouncing filtering and store it for later usage.
  matrix_row_t cols = read_cols(row);
  // Get the Debounce mask.
  matrix_row_t mask = debounce_mask(cols, row);
  // debounce the row and return the result.
  return (cols & mask) | (matrix[row] & ~mask);;
}

uint8_t matrix_scan(void)
{
    if (mcp23018_status) { // if there was an error
        if (++mcp23018_reset_loop == 0) {
        // if (++mcp23018_reset_loop >= 1300) {
            // since mcp23018_reset_loop is 8 bit - we'll try to reset once in 255 matrix scans
            // this will be approx bit more frequent than once per second
            print("trying to reset mcp23018\n");
            mcp23018_status = init_mcp23018();
            if (mcp23018_status) {
                print("left side not responding\n");
            } else {
                print("left side attached\n");
                ergodox_blink_all_leds();
            }
        }
    }

#ifdef DEBUG_MATRIX_SCAN_RATE
    matrix_scan_count++;
  matrix_scan_count++;

    uint32_t timer_now = timer_read32();
    if (TIMER_DIFF_32(timer_now, matrix_timer)>1000) {
        print("matrix scan frequency: ");
        pdec(matrix_scan_count);
        print("\n");
  uint32_t timer_now = timer_read32();
  if (TIMER_DIFF_32(timer_now, matrix_timer) > 1000) {
    print("matrix scan frequency: ");
    pdec(matrix_scan_count);
    print("\n");

        matrix_timer = timer_now;
        matrix_scan_count = 0;
    }
    matrix_timer      = timer_now;
    matrix_scan_count = 0;
  }
#endif

#ifdef LEFT_LEDS
    mcp23018_status = ergodox_left_leds_update();
#endif // LEFT_LEDS
    for (uint8_t i = 0; i < MATRIX_ROWS_PER_SIDE; i++) {
        select_row(i);
        // and select on left hand
        select_row(i + MATRIX_ROWS_PER_SIDE);
        // we don't need a 30us delay anymore, because selecting a
        // left-hand row requires more than 30us for i2c.

        // grab cols from left hand
        matrix[i] = debounce_read_cols(i);
        // grab cols from right hand
        matrix[i + MATRIX_ROWS_PER_SIDE] = debounce_read_cols(i + MATRIX_ROWS_PER_SIDE);

        unselect_rows();
    }

    matrix_scan_quantum();
  mcp23018_status = ergodox_left_leds_update();
#endif  // LEFT_LEDS
  for (uint8_t i = 0; i < MATRIX_ROWS_PER_SIDE; i++) {
    // select rows from left and right hands
    select_row(i);
    select_row(i + MATRIX_ROWS_PER_SIDE);

    // we don't need a 30us delay anymore, because selecting a
    // left-hand row requires more than 30us for i2c.

    // grab left + right cols.
    raw_matrix[i] = read_cols(i);    
    raw_matrix[i+MATRIX_ROWS_PER_SIDE] = read_cols(i+MATRIX_ROWS_PER_SIDE);
    
    unselect_rows();
  }
  
  debounce(raw_matrix, matrix, MATRIX_ROWS, true);
  matrix_scan_quantum();

    return 1;
  return 1;
}

bool matrix_is_modified(void) // deprecated and evidently not called.
bool matrix_is_modified(void)  // deprecated and evidently not called.
{
    return true;
  return true;
}

inline
bool matrix_is_on(uint8_t row, uint8_t col)
{
    return (matrix[row] & ((matrix_row_t)1<<col));
}
inline bool matrix_is_on(uint8_t row, uint8_t col) { return (matrix[row] & ((matrix_row_t)1 << col)); }

inline
matrix_row_t matrix_get_row(uint8_t row)
{
    return matrix[row];
}
inline matrix_row_t matrix_get_row(uint8_t row) { return matrix[row]; }

void matrix_print(void)
{
    print("\nr/c 0123456789ABCDEF\n");
    for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
        phex(row); print(": ");
        pbin_reverse16(matrix_get_row(row));
        print("\n");
    }
void matrix_print(void) {
  print("\nr/c 0123456789ABCDEF\n");
  for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
    phex(row);
    print(": ");
    pbin_reverse16(matrix_get_row(row));
    print("\n");
  }
}

uint8_t matrix_key_count(void)
{
    uint8_t count = 0;
    for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
        count += bitpop16(matrix[i]);
    }
    return count;
uint8_t matrix_key_count(void) {
  uint8_t count = 0;
  for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
    count += bitpop16(matrix[i]);
  }
  return count;
}

/* Column pin configuration


@@ 284,43 215,45 @@ uint8_t matrix_key_count(void)
 * col: 0   1   2   3   4   5
 * pin: B5  B4  B3  B2  B1  B0
 */
static void  init_cols(void)
{
    // init on mcp23018
    // not needed, already done as part of init_mcp23018()

    // init on teensy
    // Input with pull-up(DDR:0, PORT:1)
    DDRF  &= ~(1<<7 | 1<<6 | 1<<5 | 1<<4 | 1<<1 | 1<<0);
    PORTF |=  (1<<7 | 1<<6 | 1<<5 | 1<<4 | 1<<1 | 1<<0);
static void init_cols(void) {
  // init on mcp23018
  // not needed, already done as part of init_mcp23018()

  // init on teensy
  // Input with pull-up(DDR:0, PORT:1)
  DDRF &= ~(1 << 7 | 1 << 6 | 1 << 5 | 1 << 4 | 1 << 1 | 1 << 0);
  PORTF |= (1 << 7 | 1 << 6 | 1 << 5 | 1 << 4 | 1 << 1 | 1 << 0);
}

static matrix_row_t read_cols(uint8_t row)
{
    if (row < 7) {
        if (mcp23018_status) { // if there was an error
            return 0;
        } else {
            uint8_t data = 0;
            mcp23018_status = i2c_start(I2C_ADDR_WRITE, ERGODOX_EZ_I2C_TIMEOUT);    if (mcp23018_status) goto out;
            mcp23018_status = i2c_write(GPIOB, ERGODOX_EZ_I2C_TIMEOUT);             if (mcp23018_status) goto out;
            mcp23018_status = i2c_start(I2C_ADDR_READ, ERGODOX_EZ_I2C_TIMEOUT);     if (mcp23018_status) goto out;
            mcp23018_status = i2c_read_nack(ERGODOX_EZ_I2C_TIMEOUT);                if (mcp23018_status < 0) goto out;
            data = ~((uint8_t)mcp23018_status);
            mcp23018_status = I2C_STATUS_SUCCESS;
        out:
            i2c_stop();
            return data;
        }
static matrix_row_t read_cols(uint8_t row) {
  if (row < 7) {
    if (mcp23018_status) {  // if there was an error
      return 0;
    } else {
        /* read from teensy
	 * bitmask is 0b11110011, but we want those all
	 * in the lower six bits.
	 * we'll return 1s for the top two, but that's harmless.
	 */

        return ~((PINF & 0x03) | ((PINF & 0xF0) >> 2));
      uint8_t data    = 0;
      mcp23018_status = i2c_start(I2C_ADDR_WRITE, ERGODOX_EZ_I2C_TIMEOUT);
      if (mcp23018_status) goto out;
      mcp23018_status = i2c_write(GPIOB, ERGODOX_EZ_I2C_TIMEOUT);
      if (mcp23018_status) goto out;
      mcp23018_status = i2c_start(I2C_ADDR_READ, ERGODOX_EZ_I2C_TIMEOUT);
      if (mcp23018_status) goto out;
      mcp23018_status = i2c_read_nack(ERGODOX_EZ_I2C_TIMEOUT);
      if (mcp23018_status < 0) goto out;
      data            = ~((uint8_t)mcp23018_status);
      mcp23018_status = I2C_STATUS_SUCCESS;
    out:
      i2c_stop();
      return data;
    }
  } else {
    /* read from teensy
     * bitmask is 0b11110011, but we want those all
     * in the lower six bits.
     * we'll return 1s for the top two, but that's harmless.
     */

    return ~((PINF & 0x03) | ((PINF & 0xF0) >> 2));
  }
}

/* Row pin configuration


@@ 333,69 266,70 @@ static matrix_row_t read_cols(uint8_t row)
 * row: 0   1   2   3   4   5   6
 * pin: A0  A1  A2  A3  A4  A5  A6
 */
static void unselect_rows(void)
{
    // no need to unselect on mcp23018, because the select step sets all
    // the other row bits high, and it's not changing to a different
    // direction

    // unselect on teensy
    // Hi-Z(DDR:0, PORT:0) to unselect
    DDRB  &= ~(1<<0 | 1<<1 | 1<<2 | 1<<3);
    PORTB &= ~(1<<0 | 1<<1 | 1<<2 | 1<<3);
    DDRD  &= ~(1<<2 | 1<<3);
    PORTD &= ~(1<<2 | 1<<3);
    DDRC  &= ~(1<<6);
    PORTC &= ~(1<<6);
static void unselect_rows(void) {
  // no need to unselect on mcp23018, because the select step sets all
  // the other row bits high, and it's not changing to a different
  // direction

  // unselect on teensy
  // Hi-Z(DDR:0, PORT:0) to unselect
  DDRB &= ~(1 << 0 | 1 << 1 | 1 << 2 | 1 << 3);
  PORTB &= ~(1 << 0 | 1 << 1 | 1 << 2 | 1 << 3);
  DDRD &= ~(1 << 2 | 1 << 3);
  PORTD &= ~(1 << 2 | 1 << 3);
  DDRC &= ~(1 << 6);
  PORTC &= ~(1 << 6);
}

static void select_row(uint8_t row)
{
    if (row < 7) {
        // select on mcp23018
        if (mcp23018_status) { // if there was an error
            // do nothing
        } else {
            // set active row low  : 0
            // set other rows hi-Z : 1
            mcp23018_status = i2c_start(I2C_ADDR_WRITE, ERGODOX_EZ_I2C_TIMEOUT);        if (mcp23018_status) goto out;
            mcp23018_status = i2c_write(GPIOA, ERGODOX_EZ_I2C_TIMEOUT);                 if (mcp23018_status) goto out;
            mcp23018_status = i2c_write(0xFF & ~(1<<row), ERGODOX_EZ_I2C_TIMEOUT);      if (mcp23018_status) goto out;
        out:
            i2c_stop();
        }
static void select_row(uint8_t row) {
  if (row < 7) {
    // select on mcp23018
    if (mcp23018_status) {  // if there was an error
                            // do nothing
    } else {
        // select on teensy
        // Output low(DDR:1, PORT:0) to select
        switch (row) {
            case 7:
                DDRB  |= (1<<0);
                PORTB &= ~(1<<0);
                break;
            case 8:
                DDRB  |= (1<<1);
                PORTB &= ~(1<<1);
                break;
            case 9:
                DDRB  |= (1<<2);
                PORTB &= ~(1<<2);
                break;
            case 10:
                DDRB  |= (1<<3);
                PORTB &= ~(1<<3);
                break;
            case 11:
                DDRD  |= (1<<2);
                PORTD &= ~(1<<2);
                break;
            case 12:
                DDRD  |= (1<<3);
                PORTD &= ~(1<<3);
                break;
            case 13:
                DDRC  |= (1<<6);
                PORTC &= ~(1<<6);
                break;
        }
      // set active row low  : 0
      // set other rows hi-Z : 1
      mcp23018_status = i2c_start(I2C_ADDR_WRITE, ERGODOX_EZ_I2C_TIMEOUT);
      if (mcp23018_status) goto out;
      mcp23018_status = i2c_write(GPIOA, ERGODOX_EZ_I2C_TIMEOUT);
      if (mcp23018_status) goto out;
      mcp23018_status = i2c_write(0xFF & ~(1 << row), ERGODOX_EZ_I2C_TIMEOUT);
      if (mcp23018_status) goto out;
    out:
      i2c_stop();
    }
  } else {
    // select on teensy
    // Output low(DDR:1, PORT:0) to select
    switch (row) {
      case 7:
        DDRB |= (1 << 0);
        PORTB &= ~(1 << 0);
        break;
      case 8:
        DDRB |= (1 << 1);
        PORTB &= ~(1 << 1);
        break;
      case 9:
        DDRB |= (1 << 2);
        PORTB &= ~(1 << 2);
        break;
      case 10:
        DDRB |= (1 << 3);
        PORTB &= ~(1 << 3);
        break;
      case 11:
        DDRD |= (1 << 2);
        PORTD &= ~(1 << 2);
        break;
      case 12:
        DDRD |= (1 << 3);
        PORTD &= ~(1 << 3);
        break;
      case 13:
        DDRC |= (1 << 6);
        PORTC &= ~(1 << 6);
        break;
    }
  }
}

M keyboards/ergodox_ez/rules.mk => keyboards/ergodox_ez/rules.mk +1 -0
@@ 83,6 83,7 @@ SLEEP_LED_ENABLE = no
API_SYSEX_ENABLE = no
RGBLIGHT_ENABLE = yes
RGB_MATRIX_ENABLE = no # enable later
DEBOUNCE_TYPE = eager_pr

ifeq ($(strip $(RGB_MATRIX_ENABLE)), no)
  SRC += i2c_master.c

A quantum/debounce/eager_pr.c => quantum/debounce/eager_pr.c +100 -0
@@ 0,0 1,100 @@
/*
Copyright 2019 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-row algorithm. Uses an 8-bit counter per row.
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


#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*sizeof(debounce_counter_t));  
  for (uint8_t r = 0; r < num_rows; r++)
  {    
    debounce_counters[r] = 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++)
  {    
    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];
    
    //determine new value basd on debounce pointer + raw value
    if (*debounce_pointer == DEBOUNCE_ELAPSED &&
      (existing_row != raw_row))
    {
      *debounce_pointer = current_time;
      existing_row = raw_row; 
    }
    cooked[row] = existing_row;
    
    debounce_pointer++;
  }  
}

bool debounce_active(void)
{
  return true;
}


M quantum/debounce/readme.md => quantum/debounce/readme.md +1 -1
@@ 22,7 22,7 @@ Here are a few that could be implemented:
sym_g.c
sym_pk.c
sym_pr.c
sym_pr_cycles.c //currently used in ergo-dox
sym_pr_cycles.c 
eager_g.c
eager_pk.c
eager_pr.c //could be used in ergo-dox!