8位、16位转换

宏定义缩写	全称
U32	unsigned int
u32	unsigned long int
U16	unsigned short
u16	unsigned short int
U8	unsigned char
u8	unsigned char
S8	char
S32	int

---

#define STRING_LANGUAGE_ID 0x0409

#define HBYTE(x) ((u8)(((u16)(x) >> 8) & 0xff))
#define LBYTE(x) ((u8)(x))

LBYTE(STRING_LANGUAGE_ID), // 语言ID

HBYTE(STRING_LANGUAGE_ID)// 语言ID

#define COMB_2BYTE(x, y) ((((u16)(x))<<8) | (((u16)(y)) & 0xff))//2个u8合成一个u16

#define SWAP_WORD(x) ((((u16)(x))>>8) | (((u16)(x))<<8)) //高低8位转换