unsigned char n;sbit Gate1=P1^0;sbit Gate2=P1^1;main(){n=0;TH1=0xff;TL1=0x05; //定时器250us产生一次中断MOD = 0x10; //定时器1工作于模式1，（用工作于模式2也可以，而且更 简便)TR1=1; //使能定时器1ET0=1; //开中断EA=1; //开全局中断while(1){;}}void Timer(void) interrupt 3{ TH1=0xff; TL1=0x05; //定时器250us产生一次中断 Gate2=!Gate2; //产生500us方波 n++; if(n==4) { n=0; Gate1=!Gate1; //产生2ms方波 }}
