结构体共用体的使用

共用体：

//common.h
typedef union
{
        struct 
        {
        　　 unsigned   fTIME_5MS           : 1;     
            unsigned   TIME_5MS            : 1;      
            unsigned   TIME_10MS           : 1;       
            unsigned   TIME_30MS           : 1;      
            unsigned   TIME_50MS           : 1;     
            unsigned   TIME_1S             : 1;         
        };
        struct 
        {
            unsigned int    TimeBaseAll;
        };
}TIME_BASE;//用typedef定义的新变量名，要放在后面

extern volatile TIME_BASE TimeBase;//声明共用体

 

//timer.c
volatile TIME_BASE TimeBase;//定义共用体

 

结构体