hello.c

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/**************************************************/
/*显示HELLO                                       */
/*大学生电子设计论坛     http://www.nuedc.net.cn  */
/*作者：杨sir    版权没有 欢迎使用 				  */
/*在线技术支持QQ：68723936						  */
/**************************************************/
#include <reg51.h>
#include <intrins.h>
#define uchar unsigned char 
#define uint unsigned int
sbit wx=P2^3;
sbit dx=P2^4;
uchar code table[]={0x3f,0x06,0x5b,0x4f,
					0x66,0x6d,0x7d,0x07,
					0x7f,0x6f,0x77,0x7c,
					0x39,0x5e,0x79,0x71,
					0x76,0x79,0x38,0x00};
uchar t0,t1,aa,bb,cc,bai,shi,ge,temp,flag0,flag1,i;
uint num;
void delay(uint x); 
void display(aa,bb,cc,bai,shi,ge);
void delay(uint ms);
void main()
{
	temp=0xfe;
	num=432;
	TH1=(65536-50000)/256;
	TL1=(65536-50000)%256;
	TH0=(65536-50000)/256;
	TL0=(65536-50000)%256;
	TMOD=0x11;
	EA=1;
	ET0=1;
	ET1=1;
	TR0=1;
	TR1=1;
	
	while(1)
	{
		if (flag1!=1)
		{
			display(7,6,5,bai,shi,ge);
		}
		else
		{
			display(16,17,18,18,0,19);
		}
	 }

	
}
void timer0() interrupt 1
{
	TH0=(65536-50000)/256;
	TL0=(65536-50000)%256;
	t0++;
	if(flag0!=1)
	{
		if (t0==4)
		{	
			t0=0;
			P1=temp;
			temp=_crol_(temp,1);
		}
	}
	else
	{
		if (t0%4==0)
		{
			P1=~P1;
		}
		if (t0==60)
		{	
			TR0=0;
			P1=0xff;
			flag1=1;			
			
		}		 
	}

}
void timer1() interrupt 3
{
	TH1=(65536-50000)/256;
	TL1=(65536-50000)%256;
	t1++;
	if(t1==2)
	{
		t1=0;
		num--;
		if(num==398)
		{	
			TR1=0;
			flag0=1;
			P1=0x00;
			TR0=0;		
			TH0=(65536-50000)/256;
			TL0=(65536-50000)%256;
			t0=0;
			TR0=1;
					
		}
	bai=num/100;
	shi=num%100/10;
	ge=num%100%10;		
	}
	
}
void display(aa,bb,cc,bai,shi,ge)
{
	wx=1;
	P0=0xfe;
	wx=0;
	dx=1;
	P0=table[aa];
	dx=0;
	delay(1);

	wx=1;
	P0=0xfd;
	wx=0;
	dx=1;
	P0=table[bb];
	dx=0;
	delay(1);

	wx=1;
	P0=0xfb;
	wx=0;
	dx=1;
	P0=table[cc];
	dx=0;
	delay(1);

	wx=1;
	P0=0xf7;
	wx=0;
	dx=1;
	P0=table[bai];
	dx=0;
	delay(1);

	wx=1;
	P0=0xef;
	wx=0;
	dx=1;
	P0=table[shi];
	dx=0;
	delay(1);

	wx=1;
	P0=0xdf;
	wx=0;
	dx=1;
	P0=table[ge];
	dx=0;
	delay(1);
}
void delay(uint ms) 
{
  uchar k;
  while(ms--)
  {
    for(k = 0; k < 10; k++);
  }
}