/* * Copyright 2018 Jack Humbert <jack.humb@gmail.com> * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include "encoder.h" // for memcpy #include <string.h> #ifndef ENCODER_RESOLUTION #define ENCODER_RESOLUTION 4 #endif #ifndef NUMBER_OF_ENCODERS #error "Number of encoders not defined by NUMBER_OF_ENCODERS" #endif #if !defined(ENCODERS_PAD_A) || !defined(ENCODERS_PAD_B) #error "No encoder pads defined by ENCODERS_PAD_A and ENCODERS_PAD_B" #endif static pin_t encoders_pad_a[NUMBER_OF_ENCODERS] = ENCODERS_PAD_A; static pin_t encoders_pad_b[NUMBER_OF_ENCODERS] = ENCODERS_PAD_B; static int8_t encoder_LUT[] = { 0, -1, 1, 0, 1, 0, 0, -1, -1, 0, 0, 1, 0, 1, -1, 0 }; static uint8_t encoder_state[NUMBER_OF_ENCODERS] = {0}; #ifdef SPLIT_KEYBOARD // slave half encoders come over as second set of encoders static int8_t encoder_value[NUMBER_OF_ENCODERS * 2] = {0}; #else static int8_t encoder_value[NUMBER_OF_ENCODERS] = {0}; #endif __attribute__ ((weak)) void encoder_update_user(int8_t index, bool clockwise) { } __attribute__ ((weak)) void encoder_update_kb(int8_t index, bool clockwise) { encoder_update_user(index, clockwise); } void encoder_init(void) { for (int i = 0; i < NUMBER_OF_ENCODERS; i++) { setPinInputHigh(encoders_pad_a[i]); setPinInputHigh(encoders_pad_b[i]); encoder_state[i] = (readPin(encoders_pad_a[i]) << 0) | (readPin(encoders_pad_b[i]) << 1); } } void encoder_read(void) { for (int i = 0; i < NUMBER_OF_ENCODERS; i++) { encoder_state[i] <<= 2; encoder_state[i] |= (readPin(encoders_pad_a[i]) << 0) | (readPin(encoders_pad_b[i]) << 1); encoder_value[i] += encoder_LUT[encoder_state[i] & 0xF]; if (encoder_value[i] >= ENCODER_RESOLUTION) { encoder_update_kb(i, false); } if (encoder_value[i] <= -ENCODER_RESOLUTION) { // direction is arbitrary here, but this clockwise encoder_update_kb(i, true); } encoder_value[i] %= ENCODER_RESOLUTION; } } #ifdef SPLIT_KEYBOARD void encoder_state_raw(uint8_t* slave_state) { memcpy(slave_state, encoder_state, sizeof(encoder_state)); } void encoder_update_raw(uint8_t* slave_state) { for (int i = 0; i < NUMBER_OF_ENCODERS; i++) { encoder_value[NUMBER_OF_ENCODERS + i] += encoder_LUT[slave_state[i] & 0xF]; if (encoder_value[NUMBER_OF_ENCODERS + i] >= ENCODER_RESOLUTION) { encoder_update_kb(NUMBER_OF_ENCODERS + i, false); } if (encoder_value[NUMBER_OF_ENCODERS + i] <= -ENCODER_RESOLUTION) { // direction is arbitrary here, but this clockwise encoder_update_kb(NUMBER_OF_ENCODERS + i, true); } encoder_value[NUMBER_OF_ENCODERS + i] %= ENCODER_RESOLUTION; } } #endif