Jack Humbert
6 years ago
committed by
Drashna Jaelre
parent
e22c399245
commit
85688e5b52
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# Encoders
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Basic encoders are supported by adding this to your `rules.mk`:
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ENCODER_ENABLE = yes
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and this to your `config.h`:
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#define NUMBER_OF_ENCODERS 1
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#define ENCODERS_PAD_A { B12 }
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#define ENCODERS_PAD_B { B13 }
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Each PAD_A/B variable defines an array so multiple encoders can be defined, e.g.:
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#define ENCODERS_PAD_A { encoder1a, encoder2a }
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#define ENCODERS_PAD_B { encoder1a, encoder2b }
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If your encoder's clockwise directions are incorrect, you can swap the A & B pad definitions.
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Additionally, the resolution can be specified in the same file (the default & suggested is 4):
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#define ENCODER_RESOLUTION 4
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## Callbacks
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The callback functions can be inserted into your `<keyboard>.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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or `keymap.c`:
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void encoder_update_user(uint8_t index, bool clockwise) {
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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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/*
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* Copyright 2018 Jack Humbert <jack.humb@gmail.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "encoder.h"
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#ifndef ENCODER_RESOLUTION
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#define ENCODER_RESOLUTION 4
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#endif
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#ifndef NUMBER_OF_ENCODERS
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#error "Number of encoders not defined by NUMBER_OF_ENCODERS"
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#endif
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#if !defined(ENCODERS_PAD_A) || !defined(ENCODERS_PAD_B)
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#error "No encoder pads defined by ENCODERS_PAD_A and ENCODERS_PAD_B"
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#endif
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static pin_t encoders_pad_a[NUMBER_OF_ENCODERS] = ENCODERS_PAD_A;
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static pin_t encoders_pad_b[NUMBER_OF_ENCODERS] = ENCODERS_PAD_B;
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static int8_t encoder_LUT[] = { 0, -1, 1, 0, 1, 0, 0, -1, -1, 0, 0, 1, 0, 1, -1, 0 };
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static uint8_t encoder_state[NUMBER_OF_ENCODERS] = {0};
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static int8_t encoder_value[NUMBER_OF_ENCODERS] = {0};
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__attribute__ ((weak))
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void encoder_update_user(int8_t index, bool clockwise) { }
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__attribute__ ((weak))
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void encoder_update_kb(int8_t index, bool clockwise) {
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encoder_update_user(index, clockwise);
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}
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void encoder_init(void) {
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for (int i = 0; i < NUMBER_OF_ENCODERS; i++) {
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setPinInputHigh(encoders_pad_a[i]);
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setPinInputHigh(encoders_pad_b[i]);
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encoder_state[i] = (readPin(encoders_pad_a[i]) << 0) | (readPin(encoders_pad_b[i]) << 1);
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}
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}
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void encoder_read(void) {
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for (int i = 0; i < NUMBER_OF_ENCODERS; i++) {
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encoder_state[i] <<= 2;
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encoder_state[i] |= (readPin(encoders_pad_a[i]) << 0) | (readPin(encoders_pad_b[i]) << 1);
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encoder_value[i] += encoder_LUT[encoder_state[i] & 0xF];
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if (encoder_value[i] >= ENCODER_RESOLUTION) {
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encoder_update_kb(i, COUNTRECLOCKWISE);
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}
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if (encoder_value[i] <= -ENCODER_RESOLUTION) { // direction is arbitrary here, but this clockwise
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encoder_update_kb(i, CLOCKWISE);
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}
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encoder_value[i] %= ENCODER_RESOLUTION;
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}
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}
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@ -0,0 +1,29 @@
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/*
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* Copyright 2018 Jack Humbert <jack.humb@gmail.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include "quantum.h"
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#define COUNTRECLOCKWISE 0
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#define CLOCKWISE 1
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void encoder_init(void);
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void encoder_read(void);
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void encoder_update_kb(int8_t index, bool clockwise);
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void encoder_update_user(int8_t index, bool clockwise);
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