]> git.donarmstrong.com Git - qmk_firmware.git/blob - quantum/encoder.c
[Keyboard] Add Hannah910 (#7234)
[qmk_firmware.git] / quantum / encoder.c
1 /*
2  * Copyright 2018 Jack Humbert <jack.humb@gmail.com>
3  *
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.
8  *
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.
13  *
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/>.
16  */
17
18 #include "encoder.h"
19 #ifdef SPLIT_KEYBOARD
20 #    include "split_util.h"
21 #endif
22
23 // for memcpy
24 #include <string.h>
25
26 #ifndef ENCODER_RESOLUTION
27 #    define ENCODER_RESOLUTION 4
28 #endif
29
30 #if !defined(ENCODERS_PAD_A) || !defined(ENCODERS_PAD_B)
31 #    error "No encoder pads defined by ENCODERS_PAD_A and ENCODERS_PAD_B"
32 #endif
33
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;
37
38 static int8_t encoder_LUT[] = {0, -1, 1, 0, 1, 0, 0, -1, -1, 0, 0, 1, 0, 1, -1, 0};
39
40 static uint8_t encoder_state[NUMBER_OF_ENCODERS] = {0};
41
42 #ifdef SPLIT_KEYBOARD
43 // right half encoders come over as second set of encoders
44 static int8_t encoder_value[NUMBER_OF_ENCODERS * 2] = {0};
45 // row offsets for each hand
46 static uint8_t thisHand, thatHand;
47 #else
48 static int8_t encoder_value[NUMBER_OF_ENCODERS] = {0};
49 #endif
50
51 __attribute__((weak)) void encoder_update_user(int8_t index, bool clockwise) {}
52
53 __attribute__((weak)) void encoder_update_kb(int8_t index, bool clockwise) { encoder_update_user(index, clockwise); }
54
55 void encoder_init(void) {
56 #if defined(SPLIT_KEYBOARD) && defined(ENCODERS_PAD_A_RIGHT) && defined(ENCODERS_PAD_B_RIGHT)
57     if (!isLeftHand) {
58         const pin_t encoders_pad_a_right[] = ENCODERS_PAD_A_RIGHT;
59         const pin_t encoders_pad_b_right[] = ENCODERS_PAD_B_RIGHT;
60         for (uint8_t i = 0; i < NUMBER_OF_ENCODERS; i++) {
61             encoders_pad_a[i] = encoders_pad_a_right[i];
62             encoders_pad_b[i] = encoders_pad_b_right[i];
63         }
64     }
65 #endif
66
67     for (int i = 0; i < NUMBER_OF_ENCODERS; i++) {
68         setPinInputHigh(encoders_pad_a[i]);
69         setPinInputHigh(encoders_pad_b[i]);
70
71         encoder_state[i] = (readPin(encoders_pad_a[i]) << 0) | (readPin(encoders_pad_b[i]) << 1);
72     }
73
74 #ifdef SPLIT_KEYBOARD
75     thisHand = isLeftHand ? 0 : NUMBER_OF_ENCODERS;
76     thatHand = NUMBER_OF_ENCODERS - thisHand;
77 #endif
78 }
79
80 static void encoder_update(int8_t index, uint8_t state) {
81     encoder_value[index] += encoder_LUT[state & 0xF];
82     if (encoder_value[index] >= ENCODER_RESOLUTION) {
83         encoder_update_kb(index, false);
84     }
85     if (encoder_value[index] <= -ENCODER_RESOLUTION) { // direction is arbitrary here, but this clockwise
86         encoder_update_kb(index, true);
87     }
88     encoder_value[index] %= ENCODER_RESOLUTION;
89 }
90
91 void encoder_read(void) {
92     for (int i = 0; i < NUMBER_OF_ENCODERS; i++) {
93         encoder_state[i] <<= 2;
94         encoder_state[i] |= (readPin(encoders_pad_a[i]) << 0) | (readPin(encoders_pad_b[i]) << 1);
95 #if SPLIT_KEYBOARD
96         encoder_update(i + thisHand, encoder_state[i]);
97 #else
98         encoder_update(i, encoder_state[i]);
99 #endif
100     }
101 }
102
103 #ifdef SPLIT_KEYBOARD
104 void encoder_state_raw(uint8_t* slave_state) { memcpy(slave_state, encoder_state, sizeof(encoder_state)); }
105
106 void encoder_update_raw(uint8_t* slave_state) {
107     for (int i = 0; i < NUMBER_OF_ENCODERS; i++) {
108         encoder_update(i + thatHand, slave_state[i]);
109     }
110 }
111 #endif