hello.c

C51 程序练习

#include <reg52.h>
#include <intrins.h>
#define uchar unsigned char
#define uint unsigned int
uchar temp,t0,t1,wela,bai,shi,ge,flag,flag1;
uint shu;
void init();
void delay(uint z);
void display(uchar aa,uchar bb,uchar cc,uchar bai,uchar shi,uchar ge);
uchar code table[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71,
0x76,0x79,0x38,0x3f,0};//0到F表格HELLO
void main()
{
	init();
	while(1)
	{
		if(flag1!=1)
			display(7,6,5,bai,shi,ge);
		else
			display(16,17,18,18,19,20);//HELLO	
	}
}

void init()
{
	flag=0;
	shu=432;
	temp=0xfe;//初始化第一个灯亮
	P2=temp;
	TMOD=0x11;//定时器的工作方式定时器0定时器1
	TH0=(65536-50000)/256;
	TL0=(65536-50000)%256;
	TH1=(65536-50000)/256;
	TL1=(65536-50000)%256;
	EA=1;
	ET0=1;
	ET1=1;
	TR0=1;
	TR1=1;	
}

void timer0() interrupt 1
{
	TH0=(65536-50000)/256;
	TL0=(65536-50000)%256;
	t0++;
	if(flag!=1)
	{	if(t0==10)
			{
			t0=1;
			temp=_crol_(temp,1);
			P2=temp;
			}
	}
	else
		{
			if(t0%4==0)			
				P2=~P2;//流水灯取反闪烁
			if(t0==60)
			{		
				TR0=0;
				P2=0xff;//3秒流水灯停止
				flag1=1;
			}	
		}		
}

void timer1() interrupt 3
{
	TH1=(65536-50000)/256;
	TL1=(65536-50000)%256;
	t1++;
	if(t1==2)
		{
			t1=0;
			shu--;
			bai=shu/100;
			shi=shu%100/10;
			ge=shu%10;
			if(shu==398)
				{
					TR0=0;//控制流水灯的定时器关闭
					TH0=(65536-50000)/256;
					TL0=(65536-50000)%256;
					TR0=1;//重新启动
					flag=1;
					t0=0;
					P2=0xff;//关闭所有的流水灯
					TR1=0;//控制数码管的也关闭
				}	
		}	
}

void display(uchar aa,uchar bb,uchar cc,uchar bai,uchar shi,uchar ge)
{
		wela=0xfe;//亮aa位1111 1110   
		P1=wela;
		P0=table[aa];
		delay(1);

		wela=0xfd;//亮bb1111 1101
		P1=wela;
		P0=table[bb];
		delay(1);//快速延时动态显示

		wela=0xfb;//亮cc1111 1011
		P1=wela;
		P0=table[cc];
		delay(1);

		wela=0xf7;//亮bai位1111 0111
		P1=wela;
		P0=table[bai];
		delay(1);

		wela=0xef;//亮shi1110 1111
		P1=wela;
		P0=table[shi];
		delay(1);//快速延时动态显示

		wela=0xdf;//亮ge1101 1111
		P1=wela;
		P0=table[ge];       
		delay(1);	
}

void delay(uint z)//延时子程序
{
	uint x,y;
	for(x=z;x>0;x--)
		for(y=110;y>0;y--);
}