根據郭天祥老師定時器流水燈課件作業。
利用動態掃描和定時器1在數碼管上顯示出從765432開始以1/10秒的速度往下遞減直至765398並保持顯示此數，與此同時利用定時器0以500MS速度進行流水燈從上至下移動，當數碼管上數減到停止時，實驗板上流水燈也停止然後全部開始閃爍，3秒後（用T0定時）流水燈全部關閉、數碼管上顯示出“HELLO”。到此保持住。

#include<reg52.h>
#include<intrins.h>
#define uint unsigned int
#define uchar unsigned char
uint temp=0xfe,num=432
 
,time;
sbit dula=P2^6;
sbit wela=P2^7;
uchar code table_du[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71};
uchar code table_we[]={
0xfe,0xfd,0xfb,0xf7,0xef,0xdf};
void delay(uint z);
void disply();
void init();
void disply_hello();
void main()
{
    int mark=0;
    init();
    while(1
 
)
    {

        if(num>398)
        {
            disply();
            P1=temp;
        }
        else if(num==398&&mark!=3)
        {
            mark++;
            while(time<20)
            {
                disply();
                P1=0x0;
            }
            while(time>=20
 
&&time<=40)
            {
                wela=1;
                P0=0xff;
                wela=0;
                dula=1;
                P0=0xff;
                dula=0;
                P1=0xff;
                if(time==40)
                    time=0;
            }
        }
        else if(mark==3)
        {
            while(1)
                disply_hello();
        }
    }
}

void delay(uint z)
{
    uint x,y;
    for(x=z;x>0;x--)
        for(y=110;y>0;y--);
}

void time0() interrupt 1
{
    TH0=(65536-50000)/256;
    TL0=(65536-50000)%256;
    time++;
    if(num>398)
        if(time==4||time==8||time==12||time==16||time==20)
        {
            if(time==20)
            {
                temp=_crol_(temp,1);
                time=0;
            }
            num--;
            if(num==398)
                time=0;
        }


}
void init()
{
    num=432;
    TMOD=1;
    TH0=(65536-50000)/256;
    TL0=(65536-50000)%256;

    EA=1;
    ET0=1;
    TR0=1;
}
void disply()
{
    uint a,b,c;
    a=num/100;
    b=num/10%10;
    c=num%10;   

    P0=0x0;
    wela=1;
    P0=table_we[0];
    wela=0;
    P0=0x0;
    dula=1;
    P0=table_du[7];
    dula=0;
    delay(1);

    P0=0x0;
    wela=1;
    P0=table_we[1];
    wela=0;
    P0=0x0;
    dula=1;
    P0=table_du[6];
    dula=0;
    delay(1);

    P0=0x0;
    wela=1;
    P0=table_we[2];
    wela=0;
    P0=0x0;
    dula=1;
    P0=table_du[5];
    dula=0;
    delay(1);

    P0=0x0;
    wela=1;
    P0=table_we[3];
    wela=0;
    P0=0x0;
    dula=1;
    P0=table_du[a];
    dula=0;
    delay(1);

    P0=0x0;
    wela=1;
    P0=table_we[4];
    wela=0;
    P0=0x0;
    dula=1;
    P0=table_du[b];
    dula=0;
    delay(1);

    P0=0x0;
    wela=1;
    P0=table_we[5];
    wela=0;
    P0=0x0;
    dula=1;
    P0=table_du[c];
    dula=0;
    delay(1);
}
void disply_hello()
{
    P0=0x0;
    wela=1;
    P0=table_we[0];
    wela=0;
    P0=0x0;
    dula=1;
    P0=0x76;
    dula=0;
    delay(1);

    P0=0x0;
    wela=1;
    P0=table_we[1];
    wela=0;
    P0=0x0;
    dula=1;
    P0=0x79;
    dula=0;
    delay(1);

    P0=0x0;
    wela=1;
    P0=table_we[2];
    wela=0;
    P0=0x0;
    dula=1;
    P0=0x38;
    dula=0;
    delay(1);

    P0=0x0;
    wela=1;
    P0=table_we[3];
    wela=0;
    P0=0x0;
    dula=1;
    P0=0x38;
    dula=0;
    delay(1);

    P0=0x0;
    wela=1;
    P0=table_we[4];
    wela=0;
    P0=0x0;
    dula=1;
    P0=0x3f;
    dula=0;
    delay(1);

    P0=0x0;
    wela=1;
    P0=table_we[5];
    wela=0;
    P0=0x0;
    dula=1;
    P0=0x0;
    dula=0;
    delay(1);
}