qmk_firmware/keyboard/gh60_rev_c/gh60.h

#ifndef GH60_H
#define GH60_H

#include "matrix.h"
#include "keymap_common.h"
#include "backlight.h"
#include <stddef.h>

/* GH60 LEDs 
 *   GPIO pads
 *   0 F7 WASD LEDs
 *   1 F6 ESC LED
 *   2 F5 FN LED
 *   3 F4 POKER Arrow LEDs
 *   B2 Capslock LED
 *   B0 not connected
 */
inline void gh60_caps_led_on(void)      { DDRB |=  (1<<2); PORTB &= ~(1<<2); }
inline void gh60_poker_leds_on(void)    { DDRF |=  (1<<4); PORTF &= ~(1<<4); }
inline void gh60_fn_led_on(void)    	{ DDRF |=  (1<<5); PORTF &= ~(1<<5); }
inline void gh60_esc_led_on(void)    	{ DDRF |=  (1<<6); PORTF &= ~(1<<6); }
inline void gh60_wasd_leds_on(void)    	{ DDRF |=  (1<<7); PORTF &= ~(1<<7); }

inline void gh60_caps_led_off(void)     { DDRB &= ~(1<<2); PORTB &= ~(1<<2); }
inline void gh60_poker_leds_off(void)   { DDRF &= ~(1<<4); PORTF &= ~(1<<4); }
inline void gh60_fn_led_off(void)   	{ DDRF &= ~(1<<5); PORTF &= ~(1<<5); }
inline void gh60_esc_led_off(void)   	{ DDRF &= ~(1<<6); PORTF &= ~(1<<6); }
inline void gh60_wasd_leds_off(void)   	{ DDRF &= ~(1<<7); PORTF &= ~(1<<7); }

/* GH60 keymap definition macro
 * K2C, K31 and  K3C are extra keys for ISO
 */
#define KEYMAP( \
    K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, K0A, K0B, K0C, K0D, \
    K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K1A, K1B, K1C, K1D, \
    K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, K2A, K2B, K2C, K2D, \
    K30, K31, K32, K33, K34, K35, K36, K37, K38, K39, K3A, K3B, K3C, K3D, \
    K40, K41, K42,           K45,                K49, K4A, K4B, K4C, K4D  \
) { \
    { KC_##K00, KC_##K01, KC_##K02, KC_##K03, KC_##K04, KC_##K05, KC_##K06, KC_##K07, KC_##K08, KC_##K09, KC_##K0A, KC_##K0B, KC_##K0C, KC_##K0D }, \
    { KC_##K10, KC_##K11, KC_##K12, KC_##K13, KC_##K14, KC_##K15, KC_##K16, KC_##K17, KC_##K18, KC_##K19, KC_##K1A, KC_##K1B, KC_##K1C, KC_##K1D }, \
    { KC_##K20, KC_##K21, KC_##K22, KC_##K23, KC_##K24, KC_##K25, KC_##K26, KC_##K27, KC_##K28, KC_##K29, KC_##K2A, KC_##K2B, KC_##K2C, KC_##K2D }, \
    { KC_##K30, KC_##K31, KC_##K32, KC_##K33, KC_##K34, KC_##K35, KC_##K36, KC_##K37, KC_##K38, KC_##K39, KC_##K3A, KC_##K3B, KC_##K3C, KC_##K3D }, \
    { KC_##K40, KC_##K41, KC_##K42, KC_NO,    KC_NO,    KC_##K45, KC_NO,    KC_NO,    KC_NO,    KC_##K49, KC_##K4A, KC_##K4B, KC_##K4C, KC_##K4D }  \
}

/* ANSI valiant. No extra keys for ISO */
#define KEYMAP_ANSI( \
    K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, K0A, K0B, K0C, K0D, \
    K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K1A, K1B, K1C, K1D, \
    K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, K2A, K2B,      K2D, \
    K30, K32, K33, K34, K35, K36, K37, K38, K39, K3A, K3B,           K3D, \
    K40, K41, K42,           K45,                     K4A, K4B, K4C, K4D  \
) KEYMAP( \
    K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, K0A, K0B, K0C, K0D, \
    K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K1A, K1B, K1C, K1D, \
    K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, K2A, K2B, NO,  K2D, \
    K30, NO,  K32, K33, K34, K35, K36, K37, K38, K39, K3A, K3B, NO,  K3D, \
    K40, K41, K42,           K45,                NO,  K4A, K4B, K4C, K4D  \
)

#define KEYMAP_HHKB( \
    K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, K0A, K0B, K0C, K0D, K49,\
    K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K1A, K1B, K1C, K1D, \
    K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, K2A, K2B,      K2D, \
    K30, K32, K33, K34, K35, K36, K37, K38, K39, K3A, K3B,      K3D, K3C, \
    K40, K41, K42,           K45,                     K4A, K4B, K4C, K4D  \
) KEYMAP( \
    K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, K0A, K0B, K0C, K0D, \
    K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K1A, K1B, K1C, K1D, \
    K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, K2A, K2B, NO,  K2D, \
    K30, NO,  K32, K33, K34, K35, K36, K37, K38, K39, K3A, K3B, K3C, K3D, \
    K40, K41, K42,           K45,                K49, K4A, K4B, K4C, K4D  \
)

void matrix_init_user(void);
void matrix_scan_user(void);
void process_action_user(keyrecord_t *record);
void led_set_user(uint8_t usb_led);

#endif