qmk-firmware/keyboards/dk60/dk60.h

#ifndef DK60_H
    #define DK60_H

    #include "quantum.h"
    #include <util/delay.h>

    inline void dk60_caps_led_on(void)      {  PORTE |= (1<<6); }
    inline void dk60_esc_led_on(void)    	{  PORTF |= (1<<0); }

    inline void dk60_caps_led_off(void)     { PORTE &= ~(1<<6); }
    inline void dk60_esc_led_off(void)   	{ PORTF &= ~(1<<0); }

    inline void dk60_led_all_on(void)
    {
        dk60_caps_led_on();
        dk60_esc_led_on();
    }

    inline void dk60_led_all_off(void)
    {
        dk60_caps_led_off();
        dk60_esc_led_off();
    }

    #define ___ KC_NO

    #define LAYOUT( \
        K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, K0A, K0B, K0C, K4B, K4A, \
        K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K1A, K1B, K1C, K4C, \
        K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, K2A, K2B, K2C, \
        K30, K31, K32, K33, K34, K35, K36, K37, K38, K39, K3A, K3B, K3C, \
             K41, K42,           K45,           K48, K49  \
    ) { \
        { K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, K0A, K0B, K0C }, \
        { K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K1A, K1B, K1C }, \
        { K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, K2A, K2B, K2C }, \
        { K30, K31, K32, K33, K34, K35, K36, K37, K38, K39, K3A, K3B, K3C }, \
        { ___, K41, K42, ___, ___, K45, ___, ___, K48, K49, K4A, K4B, K4C }  \
    }

#endif