2 * Copyright 2018 Jack Humbert <jack.humb@gmail.com>
4 * This program is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
20 # include "split_util.h"
26 #ifndef ENCODER_RESOLUTION
27 # define ENCODER_RESOLUTION 4
30 #if !defined(ENCODERS_PAD_A) || !defined(ENCODERS_PAD_B)
31 # error "No encoder pads defined by ENCODERS_PAD_A and ENCODERS_PAD_B"
34 #define NUMBER_OF_ENCODERS (sizeof(encoders_pad_a) / sizeof(pin_t))
35 static pin_t encoders_pad_a[] = ENCODERS_PAD_A;
36 static pin_t encoders_pad_b[] = ENCODERS_PAD_B;
38 static int8_t encoder_LUT[] = {0, -1, 1, 0, 1, 0, 0, -1, -1, 0, 0, 1, 0, 1, -1, 0};
40 static uint8_t encoder_state[NUMBER_OF_ENCODERS] = {0};
41 static int8_t encoder_pulses[NUMBER_OF_ENCODERS] = {0};
44 // right half encoders come over as second set of encoders
45 static uint8_t encoder_value[NUMBER_OF_ENCODERS * 2] = {0};
46 // row offsets for each hand
47 static uint8_t thisHand, thatHand;
49 static uint8_t encoder_value[NUMBER_OF_ENCODERS] = {0};
52 __attribute__((weak)) void encoder_update_user(int8_t index, bool clockwise) {}
54 __attribute__((weak)) void encoder_update_kb(int8_t index, bool clockwise) { encoder_update_user(index, clockwise); }
56 void encoder_init(void) {
57 #if defined(SPLIT_KEYBOARD) && defined(ENCODERS_PAD_A_RIGHT) && defined(ENCODERS_PAD_B_RIGHT)
59 const pin_t encoders_pad_a_right[] = ENCODERS_PAD_A_RIGHT;
60 const pin_t encoders_pad_b_right[] = ENCODERS_PAD_B_RIGHT;
61 for (uint8_t i = 0; i < NUMBER_OF_ENCODERS; i++) {
62 encoders_pad_a[i] = encoders_pad_a_right[i];
63 encoders_pad_b[i] = encoders_pad_b_right[i];
68 for (int i = 0; i < NUMBER_OF_ENCODERS; i++) {
69 setPinInputHigh(encoders_pad_a[i]);
70 setPinInputHigh(encoders_pad_b[i]);
72 encoder_state[i] = (readPin(encoders_pad_a[i]) << 0) | (readPin(encoders_pad_b[i]) << 1);
76 thisHand = isLeftHand ? 0 : NUMBER_OF_ENCODERS;
77 thatHand = NUMBER_OF_ENCODERS - thisHand;
81 static void encoder_update(int8_t index, uint8_t state) {
86 encoder_pulses[i] += encoder_LUT[state & 0xF];
87 if (encoder_pulses[i] >= ENCODER_RESOLUTION) {
88 encoder_value[index]++;
89 encoder_update_kb(index, true);
91 if (encoder_pulses[i] <= -ENCODER_RESOLUTION) { // direction is arbitrary here, but this clockwise
92 encoder_value[index]--;
93 encoder_update_kb(index, false);
95 encoder_pulses[i] %= ENCODER_RESOLUTION;
98 void encoder_read(void) {
99 for (uint8_t i = 0; i < NUMBER_OF_ENCODERS; i++) {
100 encoder_state[i] <<= 2;
101 encoder_state[i] |= (readPin(encoders_pad_a[i]) << 0) | (readPin(encoders_pad_b[i]) << 1);
102 encoder_update(i, encoder_state[i]);
106 #ifdef SPLIT_KEYBOARD
107 void encoder_state_raw(uint8_t* slave_state) { memcpy(slave_state, &encoder_value[thisHand], sizeof(uint8_t) * NUMBER_OF_ENCODERS); }
109 void encoder_update_raw(uint8_t* slave_state) {
110 for (uint8_t i = 0; i < NUMBER_OF_ENCODERS; i++) {
111 uint8_t index = i + thatHand;
112 int8_t delta = slave_state[i] - encoder_value[index];
115 encoder_value[index]++;
116 encoder_update_kb(index, true);
120 encoder_value[index]--;
121 encoder_update_kb(index, false);