HCoop / jackhill / qmk / firmware.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | ||
| 20 | #ifndef ENCODER_RESOLUTION | |
| 21 | #define ENCODER_RESOLUTION 4 | |
| 22 | #endif | |
| 23 | ||
| 24 | #ifndef NUMBER_OF_ENCODERS | |
| 25 | #error "Number of encoders not defined by NUMBER_OF_ENCODERS" | |
| 26 | #endif | |
| 27 | ||
| 28 | #if !defined(ENCODERS_PAD_A) || !defined(ENCODERS_PAD_B) | |
| 29 | #error "No encoder pads defined by ENCODERS_PAD_A and ENCODERS_PAD_B" | |
| 30 | #endif | |
| 31 | ||
| 32 | static pin_t encoders_pad_a[NUMBER_OF_ENCODERS] = ENCODERS_PAD_A; | |
| 33 | static pin_t encoders_pad_b[NUMBER_OF_ENCODERS] = ENCODERS_PAD_B; | |
| 34 | ||
| 35 | static int8_t encoder_LUT[] = { 0, -1, 1, 0, 1, 0, 0, -1, -1, 0, 0, 1, 0, 1, -1, 0 }; | |
| 36 | ||
| 37 | static uint8_t encoder_state[NUMBER_OF_ENCODERS] = {0}; | |
| 38 | static int8_t encoder_value[NUMBER_OF_ENCODERS] = {0}; | |
| 39 | ||
| 40 | __attribute__ ((weak)) | |
| 41 | void encoder_update_user(int8_t index, bool clockwise) { } | |
| 42 | ||
| 43 | __attribute__ ((weak)) | |
| 44 | void encoder_update_kb(int8_t index, bool clockwise) { | |
| 45 | encoder_update_user(index, clockwise); | |
| 46 | } | |
| 47 | ||
| 48 | void encoder_init(void) { | |
| 49 | for (int i = 0; i < NUMBER_OF_ENCODERS; i++) { | |
| 50 | setPinInputHigh(encoders_pad_a[i]); | |
| 51 | setPinInputHigh(encoders_pad_b[i]); | |
| 52 | ||
| 53 | encoder_state[i] = (readPin(encoders_pad_a[i]) << 0) | (readPin(encoders_pad_b[i]) << 1); | |
| 54 | } | |
| 55 | } | |
| 56 | ||
| 57 | void encoder_read(void) { | |
| 58 | for (int i = 0; i < NUMBER_OF_ENCODERS; i++) { | |
| 59 | encoder_state[i] <<= 2; | |
| 60 | encoder_state[i] |= (readPin(encoders_pad_a[i]) << 0) | (readPin(encoders_pad_b[i]) << 1); | |
| 61 | encoder_value[i] += encoder_LUT[encoder_state[i] & 0xF]; | |
| 62 | if (encoder_value[i] >= ENCODER_RESOLUTION) { | |
| 63 | encoder_update_kb(i, COUNTRECLOCKWISE); | |
| 64 | } | |
| 65 | if (encoder_value[i] <= -ENCODER_RESOLUTION) { // direction is arbitrary here, but this clockwise | |
| 66 | encoder_update_kb(i, CLOCKWISE); | |
| 67 | } | |
| 68 | encoder_value[i] %= ENCODER_RESOLUTION; | |
| 69 | } | |
| 70 | } |