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85688e5b JH |
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 | ||
63177760 X |
20 | // for memcpy |
21 | #include <string.h> | |
22 | ||
23 | ||
85688e5b JH |
24 | #ifndef ENCODER_RESOLUTION |
25 | #define ENCODER_RESOLUTION 4 | |
26 | #endif | |
27 | ||
28 | #ifndef NUMBER_OF_ENCODERS | |
29 | #error "Number of encoders not defined by NUMBER_OF_ENCODERS" | |
30 | #endif | |
31 | ||
32 | #if !defined(ENCODERS_PAD_A) || !defined(ENCODERS_PAD_B) | |
33 | #error "No encoder pads defined by ENCODERS_PAD_A and ENCODERS_PAD_B" | |
34 | #endif | |
35 | ||
36 | static pin_t encoders_pad_a[NUMBER_OF_ENCODERS] = ENCODERS_PAD_A; | |
37 | static pin_t encoders_pad_b[NUMBER_OF_ENCODERS] = ENCODERS_PAD_B; | |
38 | ||
39 | static int8_t encoder_LUT[] = { 0, -1, 1, 0, 1, 0, 0, -1, -1, 0, 0, 1, 0, 1, -1, 0 }; | |
40 | ||
41 | static uint8_t encoder_state[NUMBER_OF_ENCODERS] = {0}; | |
63177760 X |
42 | |
43 | #ifdef SPLIT_KEYBOARD | |
44 | // slave half encoders come over as second set of encoders | |
45 | static int8_t encoder_value[NUMBER_OF_ENCODERS * 2] = {0}; | |
46 | #else | |
85688e5b | 47 | static int8_t encoder_value[NUMBER_OF_ENCODERS] = {0}; |
63177760 | 48 | #endif |
85688e5b JH |
49 | |
50 | __attribute__ ((weak)) | |
51 | void encoder_update_user(int8_t index, bool clockwise) { } | |
52 | ||
53 | __attribute__ ((weak)) | |
54 | void encoder_update_kb(int8_t index, bool clockwise) { | |
55 | encoder_update_user(index, clockwise); | |
56 | } | |
57 | ||
58 | void encoder_init(void) { | |
59 | for (int i = 0; i < NUMBER_OF_ENCODERS; i++) { | |
60 | setPinInputHigh(encoders_pad_a[i]); | |
61 | setPinInputHigh(encoders_pad_b[i]); | |
62 | ||
63 | encoder_state[i] = (readPin(encoders_pad_a[i]) << 0) | (readPin(encoders_pad_b[i]) << 1); | |
64 | } | |
65 | } | |
66 | ||
67 | void encoder_read(void) { | |
68 | for (int i = 0; i < NUMBER_OF_ENCODERS; i++) { | |
69 | encoder_state[i] <<= 2; | |
70 | encoder_state[i] |= (readPin(encoders_pad_a[i]) << 0) | (readPin(encoders_pad_b[i]) << 1); | |
71 | encoder_value[i] += encoder_LUT[encoder_state[i] & 0xF]; | |
72 | if (encoder_value[i] >= ENCODER_RESOLUTION) { | |
63177760 | 73 | encoder_update_kb(i, false); |
85688e5b JH |
74 | } |
75 | if (encoder_value[i] <= -ENCODER_RESOLUTION) { // direction is arbitrary here, but this clockwise | |
63177760 | 76 | encoder_update_kb(i, true); |
85688e5b JH |
77 | } |
78 | encoder_value[i] %= ENCODER_RESOLUTION; | |
79 | } | |
80 | } | |
63177760 X |
81 | |
82 | #ifdef SPLIT_KEYBOARD | |
83 | void encoder_state_raw(uint8_t* slave_state) { | |
84 | memcpy(slave_state, encoder_state, sizeof(encoder_state)); | |
85 | } | |
86 | ||
87 | void encoder_update_raw(uint8_t* slave_state) { | |
88 | for (int i = 0; i < NUMBER_OF_ENCODERS; i++) { | |
89 | encoder_value[NUMBER_OF_ENCODERS + i] += encoder_LUT[slave_state[i] & 0xF]; | |
90 | if (encoder_value[NUMBER_OF_ENCODERS + i] >= ENCODER_RESOLUTION) { | |
91 | encoder_update_kb(NUMBER_OF_ENCODERS + i, false); | |
92 | } | |
93 | if (encoder_value[NUMBER_OF_ENCODERS + i] <= -ENCODER_RESOLUTION) { // direction is arbitrary here, but this clockwise | |
94 | encoder_update_kb(NUMBER_OF_ENCODERS + i, true); | |
95 | } | |
96 | encoder_value[NUMBER_OF_ENCODERS + i] %= ENCODER_RESOLUTION; | |
97 | } | |
98 | } | |
99 | #endif |