qmk-dactyl-manuform-a/keyboards/nullbitsco/nibble/keymaps/via/nibble_encoder.c

/* Copyright 2020 Jay Greco
 *
 * 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 "nibble_encoder.h"

uint8_t encoder_value = 0x20,
  encoder_mode = ENC_MODE_VOLUME,
  enabled_encoder_modes = 0x1F;

uint16_t retrieve_custom_encoder_config(uint8_t encoder_idx, uint8_t behavior) {
#ifdef DYNAMIC_KEYMAP_ENABLE
    void* addr = (void*)(EEPROM_CUSTOM_ENCODER + (encoder_idx * 6) + (behavior * 2));
    uint16_t keycode = eeprom_read_byte(addr) << 8;
    keycode |= eeprom_read_byte(addr + 1);
    return keycode;
#else
    return 0;
#endif
}

void set_custom_encoder_config(uint8_t encoder_idx, uint8_t behavior, uint16_t new_code) {
#ifdef DYNAMIC_KEYMAP_ENABLE
    void* addr = (void*)(EEPROM_CUSTOM_ENCODER + (encoder_idx * 6) + (behavior * 2));
    eeprom_update_byte(addr, (uint8_t)(new_code >> 8));
    eeprom_update_byte(addr + 1, (uint8_t)(new_code & 0xFF));
#endif
}

void pre_encoder_mode_change(void) {
	dprintf("Changing encoder mode: %u\n", encoder_mode);
}

void post_encoder_mode_change(void) {
	dprintf("Encoder mode: %u\n", encoder_mode);
}

//???
void change_encoder_mode(bool clockwise) {
  pre_encoder_mode_change();
  if(enabled_encoder_modes == 0){
    enabled_encoder_modes = 0x1F;
  }
  do {
    if(!clockwise){
      if (encoder_mode == 0){
        encoder_mode = _NUM_ENCODER_MODES - 1;
      } else{
        encoder_mode = encoder_mode - 1;
      }
    } else {
        encoder_mode = (encoder_mode + 1) % _NUM_ENCODER_MODES;
    }
  } while(((1 << encoder_mode) & enabled_encoder_modes) == 0);
  post_encoder_mode_change();
}

uint16_t handle_encoder_cw(void) {
	dprintf("Encoder mode: %u\n", encoder_mode);
  uint16_t mapped_code = 0;
  switch(encoder_mode){
    default:
    	break;
    case ENC_MODE_VOLUME:
      mapped_code = KC_VOLU;
      break;
    case ENC_MODE_MEDIA:
      mapped_code = KC_MEDIA_NEXT_TRACK;
      break;
    case ENC_MODE_SCROLL:
      mapped_code = KC_WH_D;
      break;
    case ENC_MODE_BACKLIGHT:
      mapped_code = RGB_VAI;
      break;
#ifdef DYNAMIC_KEYMAP_ENABLE
    case ENC_MODE_CUSTOM0:
      mapped_code = retrieve_custom_encoder_config(0, ENC_CUSTOM_CW);
      break;
    case ENC_MODE_CUSTOM1:
      mapped_code = retrieve_custom_encoder_config(1, ENC_CUSTOM_CW);
      break;
    case ENC_MODE_CUSTOM2:
      mapped_code = retrieve_custom_encoder_config(2, ENC_CUSTOM_CW);
      break;
#endif
  }
  return mapped_code;
}

uint16_t handle_encoder_ccw(void) {
	dprintf("Encoder mode: %u\n", encoder_mode);
  uint16_t mapped_code = 0;
  switch(encoder_mode){
    default:
    	break;
    case ENC_MODE_VOLUME:
      mapped_code = KC_VOLD;
      break;
    case ENC_MODE_MEDIA:
      mapped_code = KC_MEDIA_PREV_TRACK;
      break;
    case ENC_MODE_SCROLL:
      mapped_code = KC_WH_U;
      break;
    case ENC_MODE_BACKLIGHT:
      mapped_code = RGB_VAD;
      break;
#ifdef DYNAMIC_KEYMAP_ENABLE
    case ENC_MODE_CUSTOM0:
      mapped_code = retrieve_custom_encoder_config(0, ENC_CUSTOM_CCW);
      break;
    case ENC_MODE_CUSTOM1:
      mapped_code = retrieve_custom_encoder_config(1, ENC_CUSTOM_CCW);
      break;
    case ENC_MODE_CUSTOM2:
      mapped_code = retrieve_custom_encoder_config(2, ENC_CUSTOM_CCW);
      break;
#endif
  }
  return mapped_code;
}