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fix matrix_io_delay() timing in quantum/matrix.c (#9603)

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* fix matrix_io_delay() timing in quantum/matrix.c

* Updated comments explaining the need for matrix_io_delay() in quantum/matrix.c

* fix matrix_io_delay() timing in quantum/split_common/matrix.c

* Update quantum/matrix.c

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

* Update quantum/split_common/matrix.c

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

* Update quantum/matrix.c

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

* Update quantum/split_common/matrix.c

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

* add waitOutputPinValid() and wait_cpuclock() into quantum/quantum.h and tmk_core/common/wait.h

* add matrix_output_select_delay() and matrix_output_unselect_delay()

* fix quantum/matrix_common.c, tmk_core/common/matrix.h

* fix tmk_core/common/wait.h

* fix quantum/quantum.h, tmk_core/common/wait.h

* waitOutputPinValid() rename to waitInputPinDelay() in quantum/quantum.h.

* waitOutputPinValid() rename to waitInputPinDelay() in quantum/matrix_common.c

* update tmk_core/common/wait.h

* update comment in quantum/matrix.c, quantum/split_common/matrix.c

* update quantum/quantum.h: Make more margin in the GPIO_INPUT_PIN_DELAY default value.

Co-authored-by: Ryan <fauxpark@gmail.com>
This commit is contained in:
Takeshi ISHII 2021-01-13 10:46:22 +09:00 committed by GitHub
parent 017aa5988a
commit 302b35c2a0
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GPG key ID: 4AEE18F83AFDEB23
6 changed files with 109 additions and 8 deletions
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14
quantum/matrix.c
View file

@ -101,9 +101,9 @@ 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 and wait for row selecton to stabilize
// Select row
select_row(current_row);
matrix_io_delay();
matrix_output_select_delay();
// For each col...
for (uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
@ -116,6 +116,9 @@ static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row)
// Unselect row
unselect_row(current_row);
if (current_row + 1 < MATRIX_ROWS) {
matrix_output_unselect_delay(); // wait for row signal to go HIGH
}
// If the row has changed, store the row and return the changed flag.
if (current_matrix[current_row] != current_row_value) {
@ -147,9 +150,9 @@ static void init_pins(void) {
static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col) {
bool matrix_changed = false;
// Select col and wait for col selecton to stabilize
// Select col
select_col(current_col);
matrix_io_delay();
matrix_output_select_delay();
// For each row...
for (uint8_t row_index = 0; row_index < MATRIX_ROWS; row_index++) {
@ -175,6 +178,9 @@ static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col)
// Unselect col
unselect_col(current_col);
if (current_col + 1 < MATRIX_COLS) {
matrix_output_unselect_delay(); // wait for col signal to go HIGH
}
return matrix_changed;
}

5
quantum/matrix_common.c
View file

@ -1,3 +1,4 @@
#include "quantum.h"
#include "matrix.h"
#include "debounce.h"
#include "wait.h"
@ -83,8 +84,12 @@ uint8_t matrix_key_count(void) {
return count;
}
/*　`matrix_io_delay ()` exists for backwards compatibility. From now on, use matrix_output_unselect_delay().　*/
__attribute__((weak)) void matrix_io_delay(void) { wait_us(MATRIX_IO_DELAY); }
__attribute__((weak)) void matrix_output_select_delay(void) { waitInputPinDelay(); }
__attribute__((weak)) void matrix_output_unselect_delay(void) { matrix_io_delay(); }
// CUSTOM MATRIX 'LITE'
__attribute__((weak)) void matrix_init_custom(void) {}

29
quantum/quantum.h
View file

@ -210,6 +210,13 @@ typedef uint8_t pin_t;
# define togglePin(pin) (PORTx_ADDRESS(pin) ^= _BV((pin)&0xF))
/* The AVR series GPIOs have a one clock read delay for changes in the digital input signal.
* But here's more margin to make it two clocks. */
# if !defined(GPIO_INPUT_PIN_DELAY)
# define GPIO_INPUT_PIN_DELAY 2
# endif
# define waitInputPinDelay() wait_cpuclock(GPIO_INPUT_PIN_DELAY)
#elif defined(PROTOCOL_CHIBIOS)
typedef ioline_t pin_t;
@ -225,6 +232,28 @@ typedef ioline_t pin_t;
# define readPin(pin) palReadLine(pin)
# define togglePin(pin) palToggleLine(pin)
#endif
#if defined(__ARMEL__) || defined(__ARMEB__)
/* For GPIOs on ARM-based MCUs, the input pins are sampled by the clock of the bus
* to which the GPIO is connected.
* The connected buses differ depending on the various series of MCUs.
* And since the instruction execution clock of the CPU and the bus clock of GPIO are different,
* there is a delay of several clocks to read the change of the input signal.
*
* Define this delay with the GPIO_INPUT_PIN_DELAY macro.
* If the GPIO_INPUT_PIN_DELAY macro is not defined, the following default values will be used.
* (A fairly large value of 0.25 microseconds is set.)
*/
# if !defined(GPIO_INPUT_PIN_DELAY)
# if defined(STM32_SYSCLK)
# define GPIO_INPUT_PIN_DELAY (STM32_SYSCLK/1000000L / 4)
# elif defined(KINETIS_SYSCLK_FREQUENCY)
# define GPIO_INPUT_PIN_DELAY (KINETIS_SYSCLK_FREQUENCY/1000000L / 4)
# endif
# endif
# define waitInputPinDelay() wait_cpuclock(GPIO_INPUT_PIN_DELAY)
#endif
// Atomic macro to help make GPIO and other controls atomic.

14
quantum/split_common/matrix.c
View file

@ -114,9 +114,9 @@ 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 and wait for row selecton to stabilize
// Select row
select_row(current_row);
matrix_io_delay();
matrix_output_select_delay();
// For each col...
for (uint8_t col_index = 0; col_index < MATRIX_COLS; col_index++) {
@ -129,6 +129,9 @@ static bool read_cols_on_row(matrix_row_t current_matrix[], uint8_t current_row)
// Unselect row
unselect_row(current_row);
if (current_row + 1 < MATRIX_ROWS) {
matrix_output_unselect_delay(); // wait for row signal to go HIGH
}
// If the row has changed, store the row and return the changed flag.
if (current_matrix[current_row] != current_row_value) {
@ -160,9 +163,9 @@ static void init_pins(void) {
static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col) {
bool matrix_changed = false;
// Select col and wait for col selecton to stabilize
// Select col
select_col(current_col);
matrix_io_delay();
matrix_output_select_delay();
// For each row...
for (uint8_t row_index = 0; row_index < ROWS_PER_HAND; row_index++) {
@ -188,6 +191,9 @@ static bool read_rows_on_col(matrix_row_t current_matrix[], uint8_t current_col)
// Unselect col
unselect_col(current_col);
if (current_col + 1 < MATRIX_COLS) {
matrix_output_unselect_delay(); // wait for col signal to go HIGH
}
return matrix_changed;
}

3
tmk_core/common/matrix.h
View file

@ -55,6 +55,9 @@ matrix_row_t matrix_get_row(uint8_t row);
/* print matrix for debug */
void matrix_print(void);
/* delay between changing matrix pin state and reading values */
void matrix_output_select_delay(void);
void matrix_output_unselect_delay(void);
/* only for backwards compatibility. delay between changing matrix pin state and reading values */
void matrix_io_delay(void);
/* power control */

52
tmk_core/common/wait.h
View file

@ -6,10 +6,62 @@
extern "C" {
#endif
#if defined(__ARMEL__) || defined(__ARMEB__)
# ifndef __OPTIMIZE__
# pragma message "Compiler optimizations disabled; wait_cpuclock() won't work as designed"
# endif
# define wait_cpuclock(x) wait_cpuclock_allnop(x)
# define CLOCK_DELAY_NOP8 "nop\n\t nop\n\t nop\n\t nop\n\t nop\n\t nop\n\t nop\n\t nop\n\t"
__attribute__((always_inline))
static inline void wait_cpuclock_allnop(unsigned int n) { /* n: 1..135 */
/* The argument n must be a constant expression.
* That way, compiler optimization will remove unnecessary code. */
if (n < 1) { return; }
if (n > 8) {
unsigned int n8 = n/8;
n = n - n8*8;
switch (n8) {
case 16: asm volatile (CLOCK_DELAY_NOP8::: "memory");
case 15: asm volatile (CLOCK_DELAY_NOP8::: "memory");
case 14: asm volatile (CLOCK_DELAY_NOP8::: "memory");
case 13: asm volatile (CLOCK_DELAY_NOP8::: "memory");
case 12: asm volatile (CLOCK_DELAY_NOP8::: "memory");
case 11: asm volatile (CLOCK_DELAY_NOP8::: "memory");
case 10: asm volatile (CLOCK_DELAY_NOP8::: "memory");
case 9: asm volatile (CLOCK_DELAY_NOP8::: "memory");
case 8: asm volatile (CLOCK_DELAY_NOP8::: "memory");
case 7: asm volatile (CLOCK_DELAY_NOP8::: "memory");
case 6: asm volatile (CLOCK_DELAY_NOP8::: "memory");
case 5: asm volatile (CLOCK_DELAY_NOP8::: "memory");
case 4: asm volatile (CLOCK_DELAY_NOP8::: "memory");
case 3: asm volatile (CLOCK_DELAY_NOP8::: "memory");
case 2: asm volatile (CLOCK_DELAY_NOP8::: "memory");
case 1: asm volatile (CLOCK_DELAY_NOP8::: "memory");
case 0: break;
}
}
switch (n) {
case 8: asm volatile ("nop"::: "memory");
case 7: asm volatile ("nop"::: "memory");
case 6: asm volatile ("nop"::: "memory");
case 5: asm volatile ("nop"::: "memory");
case 4: asm volatile ("nop"::: "memory");
case 3: asm volatile ("nop"::: "memory");
case 2: asm volatile ("nop"::: "memory");
case 1: asm volatile ("nop"::: "memory");
case 0: break;
}
}
#endif
#if defined(__AVR__)
# include <util/delay.h>
# define wait_ms(ms) _delay_ms(ms)
# define wait_us(us) _delay_us(us)
# define wait_cpuclock(x) __builtin_avr_delay_cycles(x)
#elif defined PROTOCOL_CHIBIOS
# include <ch.h>
# define wait_ms(ms) \