forked from mirrors/qmk_firmware
83 lines
1.9 KiB
Markdown
83 lines
1.9 KiB
Markdown
# Encoders
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Basic encoders are supported by adding this to your `rules.mk`:
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```make
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ENCODER_ENABLE = yes
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```
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and this to your `config.h`:
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```c
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#define ENCODERS_PAD_A { B12 }
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#define ENCODERS_PAD_B { B13 }
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```
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Each PAD_A/B variable defines an array so multiple encoders can be defined, e.g.:
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```c
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#define ENCODERS_PAD_A { encoder1a, encoder2a }
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#define ENCODERS_PAD_B { encoder1b, encoder2b }
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```
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If your encoder's clockwise directions are incorrect, you can swap the A & B pad definitions. They can also be flipped with a define:
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```c
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#define ENCODER_DIRECTION_FLIP
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```
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Additionally, the resolution, which defines how many pulses the encoder registers between each detent, can be defined with:
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```c
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#define ENCODER_RESOLUTION 4
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```
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It can also be defined per-encoder, by instead defining:
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```c
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#define ENCODER_RESOLUTIONS { 4, 2 }
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```
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## Split Keyboards
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If you are using different pinouts for the encoders on each half of a split keyboard, you can define the pinout (and optionally, resolutions) for the right half like this:
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```c
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#define ENCODERS_PAD_A_RIGHT { encoder1a, encoder2a }
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#define ENCODERS_PAD_B_RIGHT { encoder1b, encoder2b }
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#define ENCODER_RESOLUTIONS_RIGHT { 2, 4 }
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```
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## Callbacks
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The callback functions can be inserted into your `<keyboard>.c`:
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```c
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void encoder_update_kb(uint8_t index, bool clockwise) {
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encoder_update_user(index, clockwise);
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}
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```
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or `keymap.c`:
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```c
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void encoder_update_user(uint8_t index, bool clockwise) {
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if (index == 0) { /* First encoder */
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if (clockwise) {
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tap_code(KC_PGDN);
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} else {
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tap_code(KC_PGUP);
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}
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} else if (index == 1) { /* Second encoder */
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if (clockwise) {
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tap_code(KC_DOWN);
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} else {
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tap_code(KC_UP);
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}
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}
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}
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```
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## Hardware
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The A an B lines of the encoders should be wired directly to the MCU, and the C/common lines should be wired to ground.
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