qmk_firmware/tmk_core/common/bootmagic.h

#ifndef BOOTMAGIC_H
#define BOOTMAGIC_H

/* FIXME: Add special doxygen comments for defines here. */

/* bootmagic salt key */
#ifndef BOOTMAGIC_KEY_SALT
#    define BOOTMAGIC_KEY_SALT KC_SPACE
#endif

/* skip bootmagic and eeconfig */
#ifndef BOOTMAGIC_KEY_SKIP
#    define BOOTMAGIC_KEY_SKIP KC_ESC
#endif

/* eeprom clear */
#ifndef BOOTMAGIC_KEY_EEPROM_CLEAR
#    define BOOTMAGIC_KEY_EEPROM_CLEAR KC_BSPACE
#endif

/* kick up bootloader */
#ifndef BOOTMAGIC_KEY_BOOTLOADER
#    define BOOTMAGIC_KEY_BOOTLOADER KC_B
#endif

/* debug enable */
#ifndef BOOTMAGIC_KEY_DEBUG_ENABLE
#    define BOOTMAGIC_KEY_DEBUG_ENABLE KC_D
#endif
#ifndef BOOTMAGIC_KEY_DEBUG_MATRIX
#    define BOOTMAGIC_KEY_DEBUG_MATRIX KC_X
#endif
#ifndef BOOTMAGIC_KEY_DEBUG_KEYBOARD
#    define BOOTMAGIC_KEY_DEBUG_KEYBOARD KC_K
#endif
#ifndef BOOTMAGIC_KEY_DEBUG_MOUSE
#    define BOOTMAGIC_KEY_DEBUG_MOUSE KC_M
#endif
#ifndef BOOTMAGIC_KEY_EE_HANDS_LEFT
#    define BOOTMAGIC_KEY_EE_HANDS_LEFT KC_L
#endif
#ifndef BOOTMAGIC_KEY_EE_HANDS_RIGHT
#    define BOOTMAGIC_KEY_EE_HANDS_RIGHT KC_R
#endif

/*
 * keymap config
 */
#ifndef BOOTMAGIC_KEY_SWAP_CONTROL_CAPSLOCK
#    define BOOTMAGIC_KEY_SWAP_CONTROL_CAPSLOCK KC_LCTRL
#endif
#ifndef BOOTMAGIC_KEY_CAPSLOCK_TO_CONTROL
#    define BOOTMAGIC_KEY_CAPSLOCK_TO_CONTROL KC_CAPSLOCK
#endif
#ifndef BOOTMAGIC_KEY_SWAP_LALT_LGUI
#    define BOOTMAGIC_KEY_SWAP_LALT_LGUI KC_LALT
#endif
#ifndef BOOTMAGIC_KEY_SWAP_RALT_RGUI
#    define BOOTMAGIC_KEY_SWAP_RALT_RGUI KC_RALT
#endif
#ifndef BOOTMAGIC_KEY_NO_GUI
#    define BOOTMAGIC_KEY_NO_GUI KC_LGUI
#endif
#ifndef BOOTMAGIC_KEY_SWAP_GRAVE_ESC
#    define BOOTMAGIC_KEY_SWAP_GRAVE_ESC KC_GRAVE
#endif
#ifndef BOOTMAGIC_KEY_SWAP_BACKSLASH_BACKSPACE
#    define BOOTMAGIC_KEY_SWAP_BACKSLASH_BACKSPACE KC_BSLASH
#endif
#ifndef BOOTMAGIC_HOST_NKRO
#    define BOOTMAGIC_HOST_NKRO KC_N
#endif

/*
 * change default layer
 */
#ifndef BOOTMAGIC_KEY_DEFAULT_LAYER_0
#    define BOOTMAGIC_KEY_DEFAULT_LAYER_0 KC_0
#endif
#ifndef BOOTMAGIC_KEY_DEFAULT_LAYER_1
#    define BOOTMAGIC_KEY_DEFAULT_LAYER_1 KC_1
#endif
#ifndef BOOTMAGIC_KEY_DEFAULT_LAYER_2
#    define BOOTMAGIC_KEY_DEFAULT_LAYER_2 KC_2
#endif
#ifndef BOOTMAGIC_KEY_DEFAULT_LAYER_3
#    define BOOTMAGIC_KEY_DEFAULT_LAYER_3 KC_3
#endif
#ifndef BOOTMAGIC_KEY_DEFAULT_LAYER_4
#    define BOOTMAGIC_KEY_DEFAULT_LAYER_4 KC_4
#endif
#ifndef BOOTMAGIC_KEY_DEFAULT_LAYER_5
#    define BOOTMAGIC_KEY_DEFAULT_LAYER_5 KC_5
#endif
#ifndef BOOTMAGIC_KEY_DEFAULT_LAYER_6
#    define BOOTMAGIC_KEY_DEFAULT_LAYER_6 KC_6
#endif
#ifndef BOOTMAGIC_KEY_DEFAULT_LAYER_7
#    define BOOTMAGIC_KEY_DEFAULT_LAYER_7 KC_7
#endif

void bootmagic(void);
bool bootmagic_scan_keycode(uint8_t keycode);

#endif