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[Keyboard] Update Symmetric70 keyboard prototype (#12707)

* update handwired/symmetric70_proto/matrix.c

* make keyboards/handwired/symmetric70_proto/promicro/

* add symmetric70_proto/debug_config.h, update symmetric70_proto/local_features.mk etc.

  set MATRIX_IO_DELAY macro
    make MTEST=mdelay0  symmetric70_proto/promicro:default:flash
    make MTEST=mdelay1  symmetric70_proto/promicro:default:flash
    make MTEST=mdelay10 symmetric70_proto/promicro:default:flash
    make MTEST=mdelay30 symmetric70_proto/promicro:default:flash
  set DEBUG_MATRIX_SCAN_RATE_ENABLE yes
    make MTEST=scan symmetric70_proto/promicro:default:flash
  set MATRIX_DEBUG_DELAY and MATRIX_IO_DELAY macro
    make MTEST=matrix_debug_delay,mdelay0 symmetric70_proto/promicro:default:flash
  set MATRIX_DEBUG_SCAN
    make MTEST=matrix_debug_scan symmetric70_proto/promicro:default:flash

* add symmetric70_proto/matrix_debug/readme.md

* update symmetric70_proto/matrix_debug/readme.md

* update handwired/symmetric70_proto/readme.md

* update handwired/symmetric70_proto/readme.md

* update handwired/symmetric70_proto/*/readme.md

* add handwired/symmetric70_proto/matrix_fast/

* update handwired/symmetric70_proto/matrix_fast/readme.md

* fix typo in handwired/symmetric70_proto/matrix_fast/readme.md

* update config.h under handwired/symmetric70_proto/promicro

* add Proton C support to handwired/symmetric70_proto

* add handwired/symmetric70_proto/proton_c/readme.md

* add promicro/*/readme.md proton_c/*/readme.md

* update handwired/symmetric70_proto/proton_c/proton_c.c

support MATRIX_IO_DELAY_DEFAULT for testing.

* Added another implementation of 'adaptive_delay'.

* update symmetric70_proto/local_features.mk

* update symmetric70_proto/matrix_fast/gpio_extr.h

* add matrix_output_unselect_delay_ports()

* add MTEST=adaptive_delay_fast option

* update symmetric70_proto/matrix_debug/readme.md

* update symmetric70_proto/matrix_fast/readme.md

* update symmetric70_proto/matrix_debug/readme.md

* Erase garbage

* fix symmetric70_proto/proton_c/proton_c.c

* improve adaptive_delay_fast in symmetric70_proto/matrix_debug/matrix.c

* update symmetric70_proto/matrix_debug/readme.md

* fix symmetric70_proto/matrix_debug/readme.md

* Update keyboards/handwired/symmetric70_proto/proton_c/rules.mk

Co-authored-by: Ryan <fauxpark@gmail.com>

* Update keyboards/handwired/symmetric70_proto/proton_c/rules.mk

Co-authored-by: Ryan <fauxpark@gmail.com>

* Update keyboards/handwired/symmetric70_proto/local_features.mk

Co-authored-by: Nick Brassel <nick@tzarc.org>

* Update keyboards/handwired/symmetric70_proto/local_features.mk

Co-authored-by: Nick Brassel <nick@tzarc.org>

* Update keyboards/handwired/symmetric70_proto/matrix_debug/matrix.c

Co-authored-by: Nick Brassel <nick@tzarc.org>

* Update keyboards/handwired/symmetric70_proto/matrix_debug/matrix.c

Co-authored-by: Nick Brassel <nick@tzarc.org>

* Update keyboards/handwired/symmetric70_proto/local_features.mk

Co-authored-by: Nick Brassel <nick@tzarc.org>

* Update keyboards/handwired/symmetric70_proto/matrix_debug/matrix.c

Co-authored-by: Nick Brassel <nick@tzarc.org>

* Update keyboards/handwired/symmetric70_proto/matrix_debug/readme.md

Co-authored-by: Nick Brassel <nick@tzarc.org>

* Update keyboards/handwired/symmetric70_proto/matrix_debug/readme.md

Co-authored-by: Nick Brassel <nick@tzarc.org>

* Update keyboards/handwired/symmetric70_proto/matrix_debug/readme.md

Co-authored-by: Nick Brassel <nick@tzarc.org>

* Update keyboards/handwired/symmetric70_proto/matrix_fast/matrix_config_expand.c

Co-authored-by: Nick Brassel <nick@tzarc.org>

Co-authored-by: Ryan <fauxpark@gmail.com>
Co-authored-by: Nick Brassel <nick@tzarc.org>
This commit is contained in:
Takeshi ISHII 2021-07-13 18:14:27 +09:00 committed by GitHub
parent 6b6ee5fa28
commit b89abc402b
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
35 changed files with 1865 additions and 64 deletions

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#pragma once
// clang-format off
#if defined(__AVR__)
# define readPort(port) PINx_ADDRESS(port)
typedef uint8_t port_data_t;
#else
# define readPort(qmk_pin) palReadPort(PAL_PORT(qmk_pin))
typedef uint16_t port_data_t;
#endif

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/*
Copyright 2012-2018 Jun Wako, Jack Humbert, Yiancar
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/>.
*/
#include <stdint.h>
#include <stdbool.h>
#include "util.h"
#include "matrix.h"
#include "debounce.h"
#include "quantum.h"
#ifndef readPort
# include "gpio_extr.h"
#endif
#ifndef MATRIX_DEBUG_PIN
# define MATRIX_DEBUG_PIN_INIT()
# define MATRIX_DEBUG_SCAN_START()
# define MATRIX_DEBUG_SCAN_END()
# define MATRIX_DEBUG_DELAY_START()
# define MATRIX_DEBUG_DELAY_END()
# define MATRIX_DEBUG_GAP()
#else
# define MATRIX_DEBUG_GAP() asm volatile("nop \n nop":::"memory")
#endif
#ifndef MATRIX_IO_DELAY_ALWAYS
# define MATRIX_IO_DELAY_ALWAYS 0
#endif
#ifdef DIRECT_PINS
static pin_t direct_pins[MATRIX_ROWS][MATRIX_COLS] = DIRECT_PINS;
#elif (DIODE_DIRECTION == ROW2COL) || (DIODE_DIRECTION == COL2ROW)
static const pin_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
static const pin_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
# ifdef MATRIX_MUL_SELECT
static const pin_t col_sel[MATRIX_COLS] = MATRIX_MUL_SEL;
# endif
#endif
#ifdef MATRIX_IO_DELAY_PORTS
static const pin_t delay_ports[] = { MATRIX_IO_DELAY_PORTS };
static const port_data_t delay_masks[] = { MATRIX_IO_DELAY_MASKS };
# ifdef MATRIX_IO_DELAY_MULSEL
static const uint8_t delay_sel[] = { MATRIX_IO_DELAY_MULSEL };
# endif
#endif
/* matrix state(1:on, 0:off) */
extern matrix_row_t raw_matrix[MATRIX_ROWS]; // raw values
extern matrix_row_t matrix[MATRIX_ROWS]; // debounced values
static inline void setPinOutput_writeLow(pin_t pin) {
ATOMIC_BLOCK_FORCEON {
setPinOutput(pin);
writePinLow(pin);
}
}
static inline void setPinInputHigh_atomic(pin_t pin) {
ATOMIC_BLOCK_FORCEON { setPinInputHigh(pin); }
}
// matrix code
#ifdef DIRECT_PINS
static void init_pins(void) {
for (int row = 0; row < MATRIX_ROWS; row++) {
for (int col = 0; col < MATRIX_COLS; col++) {
pin_t pin = direct_pins[row][col];
if (pin != NO_PIN) {
setPinInputHigh(pin);
}
}
}
}
static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) {
// Start with a clear matrix row
matrix_row_t current_row_value = 0;
for (uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
pin_t pin = direct_pins[current_row][col_index];
if (pin != NO_PIN) {
current_row_value |= readPin(pin) ? 0 : (MATRIX_ROW_SHIFTER << col_index);
}
}
// If the row has changed, store the row and return the changed flag.
if (current_matrix[current_row] != current_row_value) {
current_matrix[current_row] = current_row_value;
return true;
}
return false;
}
#elif defined(DIODE_DIRECTION)
# if (DIODE_DIRECTION == COL2ROW)
static void select_row(uint8_t row) { setPinOutput_writeLow(row_pins[row]); }
static void unselect_row(uint8_t row) { setPinInputHigh_atomic(row_pins[row]); }
static void unselect_rows(void) {
for (uint8_t x = 0; x < MATRIX_ROWS; x++) {
setPinInputHigh_atomic(row_pins[x]);
}
}
static void init_pins(void) {
#ifdef MATRIX_MUL_SELECT
setPinOutput(MATRIX_MUL_SELECT);
writePinLow(MATRIX_MUL_SELECT);
#endif
unselect_rows();
for (uint8_t x = 0; x < MATRIX_COLS; x++) {
setPinInputHigh_atomic(col_pins[x]);
}
}
static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row) {
// Start with a clear matrix row
matrix_row_t current_row_value = 0;
// Select row
select_row(current_row);
matrix_output_select_delay();
// For each col...
for (uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
// Select the col pin to read (active low)
#ifdef MATRIX_MUL_SELECT
writePin(MATRIX_MUL_SELECT,col_sel[col_index]);
waitInputPinDelay();
#endif
uint8_t pin_state = readPin(col_pins[col_index]);
// Populate the matrix row with the state of the col pin
current_row_value |= pin_state ? 0 : (MATRIX_ROW_SHIFTER << col_index);
}
// Unselect row
unselect_row(current_row);
#ifdef MATRIX_IO_DELAY_PORTS
if (current_row_value) { // wait for col signal to go HIGH
bool is_pressed;
do {
MATRIX_DEBUG_DELAY_START();
is_pressed = false;
for (uint8_t i = 0; i < sizeof(delay_ports)/sizeof(pin_t); i++ ) {
# ifdef MATRIX_IO_DELAY_MULSEL
writePin(MATRIX_MUL_SELECT, delay_sel[i]);
waitInputPinDelay();
# endif
is_pressed |= ( (readPort(delay_ports[i]) & delay_masks[i]) != delay_masks[i] );
}
MATRIX_DEBUG_DELAY_END();
} while (is_pressed);
}
#endif
#ifdef MATRIX_IO_DELAY_ADAPTIVE
if (current_row_value) { // wait for col signal to go HIGH
for (uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
MATRIX_DEBUG_DELAY_START();
#ifdef MATRIX_MUL_SELECT
writePin(MATRIX_MUL_SELECT,col_sel[col_index]);
waitInputPinDelay();
#endif
while (readPin(col_pins[col_index]) == 0) {}
MATRIX_DEBUG_DELAY_END();
}
}
#endif
#ifdef MATRIX_IO_DELAY_ADAPTIVE2
if (current_row_value) { // wait for col signal to go HIGH
pin_t state;
do {
MATRIX_DEBUG_DELAY_START();
state = 0;
for (uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
MATRIX_DEBUG_DELAY_END();
MATRIX_DEBUG_DELAY_START();
#ifdef MATRIX_MUL_SELECT
writePin(MATRIX_MUL_SELECT,col_sel[col_index]);
waitInputPinDelay();
#endif
state |= (readPin(col_pins[col_index]) == 0);
}
MATRIX_DEBUG_DELAY_END();
} while (state);
}
#endif
if (MATRIX_IO_DELAY_ALWAYS || current_row + 1 < MATRIX_ROWS) {
MATRIX_DEBUG_DELAY_START();
matrix_output_unselect_delay(); // wait for col signal to go HIGH
MATRIX_DEBUG_DELAY_END();
}
// If the row has changed, store the row and return the changed flag.
if (current_matrix[current_row] != current_row_value) {
current_matrix[current_row] = current_row_value;
return true;
}
return false;
}
# elif (DIODE_DIRECTION == ROW2COL)
static void select_col(uint8_t col) { setPinOutput_writeLow(col_pins[col]); }
static void unselect_col(uint8_t col) { setPinInputHigh_atomic(col_pins[col]); }
static void unselect_cols(void) {
for (uint8_t x = 0; x < MATRIX_COLS; x++) {
setPinInputHigh_atomic(col_pins[x]);
}
}
static void init_pins(void) {
unselect_cols();
for (uint8_t x = 0; x < MATRIX_ROWS; x++) {
setPinInputHigh_atomic(row_pins[x]);
}
}
static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col) {
bool matrix_changed = false;
// Select col
select_col(current_col);
matrix_output_select_delay();
// For each row...
for (uint8_t row_index = 0; row_index < MATRIX_ROWS; row_index++) {
// Store last value of row prior to reading
matrix_row_t last_row_value = current_matrix[row_index];
matrix_row_t current_row_value = last_row_value;
// Check row pin state
if (readPin(row_pins[row_index]) == 0) {
// Pin LO, set col bit
current_row_value |= (MATRIX_ROW_SHIFTER << current_col);
} else {
// Pin HI, clear col bit
current_row_value &= ~(MATRIX_ROW_SHIFTER << current_col);
}
// Determine if the matrix changed state
if ((last_row_value != current_row_value)) {
matrix_changed |= true;
current_matrix[row_index] = current_row_value;
}
}
// Unselect col
unselect_col(current_col);
if (MATRIX_IO_DELAY_ALWAYS || current_col + 1 < MATRIX_COLS) {
matrix_output_unselect_delay(); // wait for col signal to go HIGH
}
return matrix_changed;
}
# else
# error DIODE_DIRECTION must be one of COL2ROW or ROW2COL!
# endif
#else
# error DIODE_DIRECTION is not defined!
#endif
void matrix_init(void) {
// initialize key pins
init_pins();
// initialize matrix state: all keys off
for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
raw_matrix[i] = 0;
matrix[i] = 0;
}
debounce_init(MATRIX_ROWS);
matrix_init_quantum();
}
uint8_t matrix_scan(void) {
bool changed = false;
MATRIX_DEBUG_PIN_INIT();
MATRIX_DEBUG_SCAN_START();
#if defined(DIRECT_PINS) || (DIODE_DIRECTION == COL2ROW)
// Set row, read cols
for (uint8_t current_row = 0; current_row < MATRIX_ROWS; current_row++) {
changed |= read_cols_on_row(raw_matrix, current_row);
}
#elif (DIODE_DIRECTION == ROW2COL)
// Set col, read rows
for (uint8_t current_col = 0; current_col < MATRIX_COLS; current_col++) {
changed |= read_rows_on_col(raw_matrix, current_col);
}
#endif
MATRIX_DEBUG_SCAN_END(); MATRIX_DEBUG_GAP();
MATRIX_DEBUG_SCAN_START();
debounce(raw_matrix, matrix, MATRIX_ROWS, changed);
MATRIX_DEBUG_SCAN_END(); MATRIX_DEBUG_GAP();
MATRIX_DEBUG_SCAN_START();
matrix_scan_quantum();
MATRIX_DEBUG_SCAN_END();
return (uint8_t)changed;
}

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# Debug version matrix.c
This matrix.c is quantum/matrix.c with the following additions:
* Added the MATRIX_DEBUG_SCAN_{START/END} macro to measure the execution time of matrix_scan().
* Added the MATRIX_DEBUG_DELAY_{START/END} macro to measure delay time.
* Added the MATRIX_MUL_SELECT handling for symmetric70_proto.
## Compile
* Set MATRIX_IO_DELAY value
* `make MTEST=mdelay0 handwired/symmetric70_proto/promicro/normal:default:flash`
* `make MTEST=mdelay=1 handwired/symmetric70_proto/promicro/normal:default:flash`
* `make MTEST=mdelay=2 handwired/symmetric70_proto/promicro/normal:default:flash`
* `make MTEST=mdelay=3 handwired/symmetric70_proto/promicro/normal:default:flash`
* `make MTEST=mdelay=4 handwired/symmetric70_proto/promicro/normal:default:flash`
* `make MTEST=mdelay=5 handwired/symmetric70_proto/promicro/normal:default:flash`
* `make MTEST=mdelay=10 handwired/symmetric70_proto/promicro/normal:default:flash`
* `make MTEST=mdelay=20 handwired/symmetric70_proto/promicro/normal:default:flash`
* `make MTEST=mdelay=30 handwired/symmetric70_proto/promicro/normal:default:flash`
* Measure the execution time of matrix_scan()
* `make MTEST=matrix_debug_scan[,<other options>..] handwired/symmetric70_proto/promicro/normal:default:flash`
* Measure delay time.
* `make MTEST=matrix_debug_delay[,<other options>..] handwired/symmetric70_proto/promicro/normal:default:flash`
* Change the behavior of delay
* `make MTEST=matrix_debug_delay,always_delay handwired/symmetric70_proto/promicro/normal:default:flash`
* `make MTEST=matrix_debug_delay,adaptive_delay,mdelay0 handwired/symmetric70_proto/promicro/normal:default:flash`
* `make MTEST=matrix_debug_delay,adaptive_delay_fast,mdelay0 handwired/symmetric70_proto/promicro/normal:default:flash`
## Measurement result
### Pro Micro (ATmega32u4 16Mhz)
#### Default setting (show `matrix_scan()` time)
- `make MTEST=matrix_debug_scan handwired/symmetric70_proto/promicro/normal:default:flash`
- CH1: Row 0
- CH2: Row 1
- CH3: Row 4
- CH4: matrix_scan()
- Execution time of matrix_scan() 503us
- Frequency of matrix scan 1.81kHz (551.0us)
![DS1Z_QuickPrint2](https://user-images.githubusercontent.com/2170248/115994477-0ba64400-a612-11eb-98ba-b8cc362f26ac.png)
#### Always call `matrix_output_unselect_delay()` (show `matrix_scan()` time, default MATRIX_IO_DELAY)
- `make MTEST=matrix_debug_scan,always_delay handwired/symmetric70_proto/promicro/normal:default:flash`
- CH1: Row 0
- CH2: Row 1
- CH3: Row 4
- CH4: matrix_scan()
- Execution time of matrix_scan() 521us
- Frequency of matrix scan 1.76kHz (568.5us)
![DS1Z_QuickPrint1](https://user-images.githubusercontent.com/2170248/115994488-1660d900-a612-11eb-83b1-cd820607db03.png)
#### Adaptive delay (show `matrix_scan()` time, MATRIX_IO_DELAY = 0)
- `make MTEST=matrix_debug_scan,mdelay0,adaptive_delay handwired/symmetric70_proto/promicro/normal:default:flash`
- CH1: Row 0
- CH2: Row 1
- CH3: Row 4
- CH4: matrix_scan()
- Execution time of matrix_scan() 383us
- Frequency of matrix scan 2.32kHz (431us)
![DS1Z_QuickPrint3](https://user-images.githubusercontent.com/2170248/115994939-034f0880-a614-11eb-861f-b83a31efa51a.png)
#### Adaptive delay (show delay time, MATRIX_IO_DELAY = 0)
- `make MTEST=matrix_debug_delay,mdelay0,adaptive_delay handwired/symmetric70_proto/promicro/normal:default:flash`
##### Press R0C1, R1C1 key
- CH1: Row 0
- CH2: Row 1
- CH3: Row 4
- CH4: delay time
- Delay time 68us
- Frequency of matrix scan 1.77kHz (565us)
![DS1Z_QuickPrint55](https://user-images.githubusercontent.com/2170248/119561268-ead33900-bddf-11eb-9cc4-7e04826486cf.png)
#### Fast adaptive delay (show `matrix_scan()` time, MATRIX_IO_DELAY = 0)
- `make MTEST=matrix_debug_scan,mdelay0,adaptive_delay_fast handwired/symmetric70_proto/promicro/normal:default:flash`
- CH1: Row 0
- CH2: Row 1
- CH3: Row 4
- CH4: matrix_scan()
- Execution time of matrix_scan() 382us
- Frequency of matrix scan 2.33kHz (428us)
![DS1Z_QuickPrint56](https://user-images.githubusercontent.com/2170248/119561280-eeff5680-bddf-11eb-9576-e4cf64751955.png)
#### Fast adaptive delay (show delay time, MATRIX_IO_DELAY = 0)
- `make MTEST=matrix_debug_delay,mdelay0,adaptive_delay_fast handwired/symmetric70_proto/promicro/normal:default:flash`
##### Press R0C1, R1C1 key
- CH1: Row 0
- CH2: Row 1
- CH3: Row 4
- CH4: delay time
- Delay time 11us
- Frequency of matrix scan 2.21kHz (452us)
![DS1Z_QuickPrint57](https://user-images.githubusercontent.com/2170248/119561318-faeb1880-bddf-11eb-8592-694f9ecb2248.png)
### Proton C (STM32F303 72MHz)
#### Default setting (show `matrix_scan()` time)
- `make MTEST=matrix_debug_scan handwired/symmetric70_proto/proton_c/normal:default:flash`
- CH1: Row 0
- CH2: Row 1
- CH3: Row 4
- CH4: matrix_scan()
- Execution time of matrix_scan() 210us
- Frequency of matrix scan 4.35kHz (230.0us)
![DS1Z_QuickPrint16](https://user-images.githubusercontent.com/2170248/116131295-2ad2cd80-a707-11eb-8d0a-6f7912456e03.png)
#### Always call `matrix_output_unselect_delay()` (show `matrix_scan()` time, default MATRIX_IO_DELAY)
- `make MTEST=matrix_debug_scan,always_delay handwired/symmetric70_proto/proton_c/normal:default:flash`
- CH1: Row 0
- CH2: Row 1
- CH3: Row 4
- CH4: matrix_scan()
- Execution time of matrix_scan() 242us
- Frequency of matrix scan 3.85kHz (260.0us)
![DS1Z_QuickPrint17](https://user-images.githubusercontent.com/2170248/116131308-31f9db80-a707-11eb-8db7-d1960fa7b068.png)
#### Adaptive delay (show `matrix_scan()` time, MATRIX_IO_DELAY = 0)
- `make MTEST=matrix_debug_scan,mdelay0,adaptive_delay handwired/symmetric70_proto/proton_c/normal:default:flash`
- CH1: Row 0
- CH2: Row 1
- CH3: Row 4
- CH4: matrix_scan()
- Execution time of matrix_scan() 76.4us
- Frequency of matrix scan 10.6kHz (94.4us)
![DS1Z_QuickPrint18](https://user-images.githubusercontent.com/2170248/116131369-44741500-a707-11eb-9c74-fa39d9e80947.png)
#### Adaptive delay (show delay time, MATRIX_IO_DELAY = 0)
- `make MTEST=matrix_debug_delay,mdelay0,adaptive_delay handwired/symmetric70_proto/proton_c/normal:default:flash`
##### Press R0C1, R1C1 key
- CH1: Row 0
- CH2: Row 1
- CH3: Row 4
- CH4: delay time
- Delay time 7.6us
- Frequency of matrix scan 9.47kHz (105.6us)
![DS1Z_QuickPrint58](https://user-images.githubusercontent.com/2170248/119666783-a3e15400-be70-11eb-9a58-220032117efd.png)
##### Connect a 500pF capacitor between C2 line and GND, Press R0C2, R1C2, R2C2, R3C2, R4C2 keys
- CH1: Row 0
- CH2: Row 1
- CH3: Col 2
- CH4: delay time
- Delay time 12us + alpha
- Frequency of matrix scan 5.45kHz (183us)
- Threshold Voltage 1.9V
![DS1Z_QuickPrint59](https://user-images.githubusercontent.com/2170248/119666946-cc694e00-be70-11eb-9b97-4c500416d774.png)
##### Connect a 1000pF capacitor between C2 line and GND, Press R0C2, R1C2, R2C2, R3C2, R4C2 keys
- CH1: Row 0
- CH2: Row 1
- CH3: Col 2
- CH4: delay time
- Delay time 20us + alpha
- Frequency of matrix scan 4.48kHz (223us)
- Threshold Voltage 1.9V
![DS1Z_QuickPrint60](https://user-images.githubusercontent.com/2170248/119667127-f3c01b00-be70-11eb-8e7f-6f0a81f95e97.png)
#### Fast adaptive delay (show `matrix_scan()` time, MATRIX_IO_DELAY = 0)
- `make MTEST=matrix_debug_scan,mdelay0,adaptive_delay_fast handwired/symmetric70_proto/proton_c/normal:default:flash`
- CH1: Row 0
- CH2: Row 1
- CH3: Row 4
- CH4: matrix_scan()
- Execution time of matrix_scan() 75.6us
- Frequency of matrix scan 10.8kHz (92.2us)
![DS1Z_QuickPrint62](https://user-images.githubusercontent.com/2170248/119667218-0b979f00-be71-11eb-946c-16f0a0454056.png)
#### Fast adaptive delay (show delay time, MATRIX_IO_DELAY = 0)
- `make MTEST=matrix_debug_delay,mdelay0,adaptive_delay_fast handwired/symmetric70_proto/proton_c/normal:default:flash`
##### Press R0C1, R1C1 key
- CH1: Row 0
- CH2: Row 1
- CH3: Row 4
- CH4: delay time
- Delay time 1.6us
- Frequency of matrix scan 10.6kHz (94.4us)
![DS1Z_QuickPrint63](https://user-images.githubusercontent.com/2170248/119667378-33870280-be71-11eb-95aa-64213138ddac.png)
![DS1Z_QuickPrint64](https://user-images.githubusercontent.com/2170248/119667504-52859480-be71-11eb-963e-eebc6e3da9dc.png)
##### Connect a 500pF capacitor between C2 line and GND, Press R0C2, R1C2, R2C2, R3C2, R4C2 keys
- CH1: Row 0
- CH2: Row 1
- CH3: Col 2
- CH4: delay time
- Delay time 13.2us
- Frequency of matrix scan 6.58kHz (152.6us)
- Threshold Voltage 1.9V
![DS1Z_QuickPrint65](https://user-images.githubusercontent.com/2170248/119667644-72b55380-be71-11eb-8030-854de1900408.png)
##### Connect a 1000pF capacitor between C2 line and GND, Press R0C2, R1C2, R2C2, R3C2, R4C2 keys
- CH1: Row 0
- CH2: Row 1
- CH3: Col 2
- CH4: delay time
- Delay time 20us
- Frequency of matrix scan 5.30kHz (188.8us)
- Threshold Voltage 1.9V
![DS1Z_QuickPrint66](https://user-images.githubusercontent.com/2170248/119667785-8f518b80-be71-11eb-8d40-fc3293aa072b.png)