LED流水+定时器.zip_color9cb_zip_单片机

#include<reg51.h> //宏定义 #define uchar unsigned char #define LED P2 //全局变量 uchar Time; void main(void) { uchar data1=0xfe; TMOD = 0x01; //选择工作方式1 TH0 = 0x3C; //设置初始值,定时50MS TL0 = 0xB0; EA = 1; //打开总中断 ET0 = 1; //打开定时器0中断 TR0 = 1; //启动定时器0 while(1) { LED = data1; if(Time==10) //0.5s进入if内进行移位 { Time = 0; data1 = data1<<1|0x01; if(data1==0xff)data1=0xfe; } } } void Timer0() interrupt 1 { TH0 = 0x3C; //设置初始值 TL0 = 0xB0; Time++; }