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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.
pjones-keymap
Alex Ong 4 months ago
parent
commit
17e7762de7

+ 4
- 1
docs/feature_debounce_type.md View File

@@ -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.



+ 196
- 262
keyboards/ergodox_ez/matrix.c View File

@@ -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;
}
}
}

+ 1
- 0
keyboards/ergodox_ez/rules.mk View File

@@ -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

+ 100
- 0
quantum/debounce/eager_pr.c View File

@@ -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;
}


+ 1
- 1
quantum/debounce/readme.md View File

@@ -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!

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