Change the prototype of matrix_output_unselect_delay() #13045
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mtei
requested review from
noroadsleft,
zvecr,
drashna,
fauxpark,
tzarc and
a team
tzarc
approved these changes
Jun 1, 2021
The prototype of matrix_output_unselect_delay() has been changed as follows.
```c
void matrix_output_unselect_delay(uint8_t line, bool key_pressed);
```
Currently, no keyboard seems to be redefining `matrix_output_unselect_delay()`, so there is no change in the system behavior.
With this change, the keyboard level code can get some optimization hints, for example, the following.
```c
void matrix_output_unselect_delay(uint8_t line, bool key_pressed) {
/* If none of the keys are pressed,
* there is no need to wait for time for the next line. */
if (key_pressed) {
#ifdef MATRIX_IO_DELAY
# if MATRIX_IO_DELAY > 0
wait_us(MATRIX_IO_DELAY);
# endif
#else
wait_us(30);
#endif
}
}
```
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fauxpark
approved these changes
Jul 13, 2021
|
Beautiful optimization! |
Thanks! This is a port of one of the findings gained in the process of trying to create a faster and more flexible matrix.c into the current matrix.c. |
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nhongooi
pushed a commit
to nhongooi/qmk_firmware
that referenced
this pull request
Dec 5, 2021
The prototype of matrix_output_unselect_delay() has been changed as follows.
```c
void matrix_output_unselect_delay(uint8_t line, bool key_pressed);
```
Currently, no keyboard seems to be redefining `matrix_output_unselect_delay()`, so there is no change in the system behavior.
With this change, the keyboard level code can get some optimization hints, for example, the following.
```c
void matrix_output_unselect_delay(uint8_t line, bool key_pressed) {
/* If none of the keys are pressed,
* there is no need to wait for time for the next line. */
if (key_pressed) {
#ifdef MATRIX_IO_DELAY
# if MATRIX_IO_DELAY > 0
wait_us(MATRIX_IO_DELAY);
# endif
#else
wait_us(30);
#endif
}
}
```
BorisTestov
pushed a commit
to BorisTestov/qmk_firmware
that referenced
this pull request
May 23, 2024
The prototype of matrix_output_unselect_delay() has been changed as follows.
```c
void matrix_output_unselect_delay(uint8_t line, bool key_pressed);
```
Currently, no keyboard seems to be redefining `matrix_output_unselect_delay()`, so there is no change in the system behavior.
With this change, the keyboard level code can get some optimization hints, for example, the following.
```c
void matrix_output_unselect_delay(uint8_t line, bool key_pressed) {
/* If none of the keys are pressed,
* there is no need to wait for time for the next line. */
if (key_pressed) {
#ifdef MATRIX_IO_DELAY
# if MATRIX_IO_DELAY > 0
wait_us(MATRIX_IO_DELAY);
# endif
#else
wait_us(30);
#endif
}
}
```
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Description
The prototype of matrix_output_unselect_delay() has been changed as follows.
Currently, no keyboard seems to be redefining
matrix_output_unselect_delay(), so there is no change in the system behavior.With this change, the keyboard level code can get some optimization hints, for example, the following.
note: I have not yet checked the operation on real hardware.I used Helix Rev3 (ProMicro) to verify that it works.
Using
matrix_output_unselect_delay()in the above example to optimize the delay processing, the matrix scan rate has been improved from 1525 to 1975.Types of Changes
Checklist