typedef.h

来自「ARP协议,含ARP」· C头文件 代码 · 共 19 行

#ifndef _TYPEDEF_H_
#define _TYPEDEF_H_
#define false           0
#define true            1
#define bool            unsigned char
#define uc              unsigned char
#define us              unsigned short
#define ul              unsigned long
#define NULL            ((void*)0)


#ifndef cbi                                //定义sbi和cbi 
#define cbi(reg,bit)   reg &= ~(_BV(bit))   
#endif   
#ifndef sbi   
#define sbi(reg,bit)   reg |= (_BV(bit))   
#endif 

#endif