利用动态扫描和定时器1在数码管上显示出从765432开始以1/10秒的速度往下递减直至765398并保持显示此数，与此同时利用定时器O以500MS速度进行流水灯从土至下移动,当数码管上数减到停止时，实验板上流水灯也停止然后全部开始闪烁，3秒后（用TO定时)流水灯全部关闭、数码管上显示出"HELLO”。到此保持住。
#include <reg52.h>
#include <intrins.h>
#define uchar unsigned char
#define uint unsigned int
uchar temp,t0,t1,bai,shi,ge,flag,flag1;
uint shu;sbit dula=P2^6;
sbit wela=P2^7;
uchar code table[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71,
0x36,0x79,0x38,0x3f,0};void init();
void delay(uint z);
void display(uchar aa,uchar bb,uchar cc,uchar bai,uchar shi,uchar ge);
void main()
{init();while(1){ if(flag1!=1)display(7,6,5,bai,shi,ge);elsedisplay(16,17,18,18,19,20);}
}void init()
{shu=432;temp=0xfe;P1=temp;//点亮第一个发光二极管TMOD=0x11;TH0=(65536-5000)/256;//装初值TL0=(65536-5000)%256;TH1=(65536-5000)/256;//定时器1装初值TL1=(65536-5000)%256;EA=1;ET0=1;ET1=1;//开定时器1TR0=1;TR1=1;//启动定时器1
}void timer0() interrupt 1
{TH0=(65536-5000)/256;//装初值TL0=(65536-5000)%256;t0++;if(flag!=1){if(t0==10){t0=1;temp=_crol_(temp,1);P1=temp;}}else{if(t0%4==0) P1=~P1; if(t0==60){ TR0=0;P1=0xff;flag1=1;}}
}void timer1() interrupt 3
{TH1=(65536-5000)/256;//装初值TL1=(65536-5000)%256;t1++;if(t1==2){t1=0;shu--;bai=shu/100;shi=shu%100/10;ge=shu/10;if(shu==398){ TR0=0;TH0=(65536-5000)/256;//装初值TL0=(65536-5000)%256;TR0=1;flag=1;t0=0;P1=0xff;TR1=0;}}
}void display(uchar aa,uchar bb,uchar cc,uchar bai,uchar shi,uchar ge)
{dula = 1;P0=table[aa];dula =0;P0=0xff;wela=1;P0=0xfe;wela=0;delay(1);dula = 1;P0=table[bb];dula =0;P0=0xff;wela=1;P0=0xfd;wela=0;delay(1);dula = 1;P0=table[cc];dula=0;P0=0xff;wela=1;P0=0xfb;wela=0;delay(1);dula = 1;P0=table[bai];dula=0;P0=0xff;wela=1;P0=0xf7;wela=0;delay(1);dula = 1;P0=table[shi];dula=0;P0=0xff;wela=1;P0=0xef;wela=0;delay(1);dula = 1;P0=table[ge];dula=0;P0=0xff;wela=1;P0=0xdf;wela=0;delay(1);
}
void delay(uint z)
{ uint x,y;for(x=z;x>0;x--)for(y=110;y>0;y--);
}
