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Align SPLIT_HAND_MATRIX_GRID left/right logic with SPLIT_HAND_PIN (#22775)

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Joel Challis 2024-01-09 11:24:53 +00:00 • committed by GitHub
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docs/feature_split_keyboard.md
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@ -119,12 +119,12 @@ You can configure the firmware to read key matrix pins on the controller to dete
The first pin is the output pin and the second is the input pin.
Some keyboards have unused intersections in the key matrix. This setting uses one of these unused intersections to determine the handness.
Some keyboards have unused intersections in the key matrix. This setting uses one of these unused intersections to determine the handedness.
Normally, when a diode is connected to an intersection, it is judged to be left. If you add the following definition, it will be judged to be right.
Normally, when a diode is connected to an intersection, it is judged to be right. If you add the following definition, it will be judged to be left.
```c
#define SPLIT_HAND_MATRIX_GRID_LOW_IS_RIGHT
#define SPLIT_HAND_MATRIX_GRID_LOW_IS_LEFT
```
Note that adding a diode at a previously unused intersection will effectively tell the firmware that there is a key held down at that point. You can instruct qmk to ignore that intersection by defining `MATRIX_MASKED` and then defining a `matrix_row_t matrix_mask[MATRIX_ROWS]` array in your keyboard config. Each bit of a single value (starting form the least-significant bit) is used to tell qmk whether or not to pay attention to key presses at that intersection.