109 lines
2.7 KiB
Markdown
109 lines
2.7 KiB
Markdown
# Custom Matrix
|
|
|
|
QMK provides a mechanism to supplement or replace the default matrix scanning routine with your own code.
|
|
|
|
The reasons to use this feature include:
|
|
|
|
* Extra hardware between the keyboard's switches and MCU pins
|
|
* I/O multiplexer
|
|
* Line decoder
|
|
* Irregular switch matrix
|
|
* Simultaneous use of `COL2ROW` and `ROW2COL`
|
|
|
|
## Prerequisites
|
|
|
|
Implementing custom matrix usually involves compilation of an additional source file. It is recommended that for consistency, this file is called `matrix.c`.
|
|
|
|
Add a new file to your keyboard directory:
|
|
```text
|
|
keyboards/<keyboard>/matrix.c
|
|
```
|
|
|
|
And to configure compilation for the new file, add this to your `rules.mk`:
|
|
```make
|
|
SRC += matrix.c
|
|
```
|
|
|
|
## 'lite'
|
|
|
|
Provides a default implementation for various scanning functions, reducing the boilerplate code when implementing custom matrix.
|
|
To configure it, add this to your `rules.mk`:
|
|
|
|
```make
|
|
CUSTOM_MATRIX = lite
|
|
```
|
|
|
|
And implement the following functions in a `matrix.c` file in your keyboard folder:
|
|
|
|
```c
|
|
void matrix_init_custom(void) {
|
|
// TODO: initialize hardware here
|
|
}
|
|
|
|
bool matrix_scan_custom(matrix_row_t current_matrix[]) {
|
|
bool matrix_has_changed = false;
|
|
|
|
// TODO: add matrix scanning routine here
|
|
|
|
return matrix_has_changed;
|
|
}
|
|
```
|
|
|
|
|
|
## Full Replacement
|
|
|
|
When more control over the scanning routine is required, you can choose to implement the full scanning routine.
|
|
To configure it, add this to your rules.mk:
|
|
|
|
```make
|
|
CUSTOM_MATRIX = yes
|
|
```
|
|
|
|
And implement the following functions in a `matrix.c` file in your keyboard folder:
|
|
|
|
```c
|
|
matrix_row_t matrix_get_row(uint8_t row) {
|
|
// TODO: return the requested row data
|
|
}
|
|
|
|
void matrix_print(void) {
|
|
// TODO: use print() to dump the current matrix state to console
|
|
}
|
|
|
|
void matrix_init(void) {
|
|
// TODO: initialize hardware and global matrix state here
|
|
|
|
// Unless hardware debouncing - Init the configured debounce routine
|
|
debounce_init(MATRIX_ROWS);
|
|
|
|
// This *must* be called for correct keyboard behavior
|
|
matrix_init_quantum();
|
|
}
|
|
|
|
uint8_t matrix_scan(void) {
|
|
bool matrix_has_changed = false;
|
|
|
|
// TODO: add matrix scanning routine here
|
|
|
|
// Unless hardware debouncing - use the configured debounce routine
|
|
debounce(raw_matrix, matrix, MATRIX_ROWS, changed);
|
|
|
|
// This *must* be called for correct keyboard behavior
|
|
matrix_scan_quantum();
|
|
|
|
return matrix_has_changed;
|
|
}
|
|
```
|
|
|
|
And also provide defaults for the following callbacks:
|
|
|
|
```c
|
|
__attribute__((weak)) void matrix_init_kb(void) { matrix_init_user(); }
|
|
|
|
__attribute__((weak)) void matrix_scan_kb(void) { matrix_scan_user(); }
|
|
|
|
__attribute__((weak)) void matrix_init_user(void) {}
|
|
|
|
__attribute__((weak)) void matrix_scan_user(void) {}
|
|
```
|