#include typedef union { uint32_t raw; struct { bool ansi_emulation :1; }; } user_config_t; extern user_config_t user_config; #define _QWERTY 0 #define _LOWER 1 #define _RAISE_ISO 2 #define _RAISE _RAISE_ISO #define _RAISE_ANSI 3 #define _ADJUST 4 #define _NAV 5