51单片机程序

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 
#include 
#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);
		else
			display(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1
	TR0=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--);
}