按键信号是can  信号      按键状态是一直发送的       现在 jiashimoshi =1            jiashimoshijishu =一直   0   1  2       循环




if     ( jiashimoshi ==1)                                    jiashimoshi =按键         不安=0          按=1
jiashimoshibiaozihi=0;
jiashimoshijishu+=1;                                                                       jiashimoshijishu 有三个状态 0     1     2     




   
    {

if(jiashimoshijishu==3)
jiashimoshijishu=0;
}

怎么  判断周期 执行