132 lines
4.3 KiB
C
132 lines
4.3 KiB
C
/*
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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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#ifdef SPLIT_KEYBOARD
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# include "split_util.h"
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#endif
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// for memcpy
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#include <string.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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#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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#define NUMBER_OF_ENCODERS (sizeof(encoders_pad_a) / sizeof(pin_t))
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static pin_t encoders_pad_a[] = ENCODERS_PAD_A;
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static pin_t encoders_pad_b[] = ENCODERS_PAD_B;
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#ifndef ENCODER_DIRECTION_FLIP
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# define ENCODER_CLOCKWISE true
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# define ENCODER_COUNTER_CLOCKWISE false
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#else
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# define ENCODER_CLOCKWISE false
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# define ENCODER_COUNTER_CLOCKWISE true
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#endif
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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_pulses[NUMBER_OF_ENCODERS] = {0};
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#ifdef SPLIT_KEYBOARD
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// right half encoders come over as second set of encoders
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static uint8_t encoder_value[NUMBER_OF_ENCODERS * 2] = {0};
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// row offsets for each hand
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static uint8_t thisHand, thatHand;
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#else
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static uint8_t encoder_value[NUMBER_OF_ENCODERS] = {0};
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#endif
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__attribute__((weak)) void encoder_update_user(int8_t index, bool clockwise) {}
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__attribute__((weak)) void encoder_update_kb(int8_t index, bool clockwise) { encoder_update_user(index, clockwise); }
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void encoder_init(void) {
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#if defined(SPLIT_KEYBOARD) && defined(ENCODERS_PAD_A_RIGHT) && defined(ENCODERS_PAD_B_RIGHT)
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if (!isLeftHand) {
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const pin_t encoders_pad_a_right[] = ENCODERS_PAD_A_RIGHT;
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const pin_t encoders_pad_b_right[] = ENCODERS_PAD_B_RIGHT;
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for (uint8_t i = 0; i < NUMBER_OF_ENCODERS; i++) {
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encoders_pad_a[i] = encoders_pad_a_right[i];
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encoders_pad_b[i] = encoders_pad_b_right[i];
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}
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}
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#endif
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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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#ifdef SPLIT_KEYBOARD
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thisHand = isLeftHand ? 0 : NUMBER_OF_ENCODERS;
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thatHand = NUMBER_OF_ENCODERS - thisHand;
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#endif
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}
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static void encoder_update(int8_t index, uint8_t state) {
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uint8_t i = index;
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#ifdef SPLIT_KEYBOARD
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index += thisHand;
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#endif
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encoder_pulses[i] += encoder_LUT[state & 0xF];
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if (encoder_pulses[i] >= ENCODER_RESOLUTION) {
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encoder_value[index]++;
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encoder_update_kb(index, ENCODER_COUNTER_CLOCKWISE);
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}
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if (encoder_pulses[i] <= -ENCODER_RESOLUTION) { // direction is arbitrary here, but this clockwise
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encoder_value[index]--;
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encoder_update_kb(index, ENCODER_CLOCKWISE);
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}
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encoder_pulses[i] %= ENCODER_RESOLUTION;
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}
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void encoder_read(void) {
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for (uint8_t 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_update(i, encoder_state[i]);
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}
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}
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#ifdef SPLIT_KEYBOARD
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void encoder_state_raw(uint8_t* slave_state) { memcpy(slave_state, &encoder_value[thisHand], sizeof(uint8_t) * NUMBER_OF_ENCODERS); }
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void encoder_update_raw(uint8_t* slave_state) {
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for (uint8_t i = 0; i < NUMBER_OF_ENCODERS; i++) {
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uint8_t index = i + thatHand;
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int8_t delta = slave_state[i] - encoder_value[index];
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while (delta > 0) {
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delta--;
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encoder_value[index]++;
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encoder_update_kb(index, ENCODER_COUNTER_CLOCKWISE);
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}
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while (delta < 0) {
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delta++;
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encoder_value[index]--;
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encoder_update_kb(index, ENCODER_CLOCKWISE);
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}
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}
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}
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#endif
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