1274.c

51单片机C程序

//数码管前三位显示一个跑表，从000到999之间以1%秒速度运行，
//当按下一个独立键盘时跑表停止，松开手后跑表继续运行。

#include<reg52.h>
#define uc unsigned char
#define ui unsigned int
sbit L4=P3^4;
sbit dus=P2^6;
sbit wes=P2^7;
uc code table[]={
0x3f,0x06,0x5b,0x4f,0x66,0x6d,
0x7d,0x07,0x7f,0x6f,0x77};
uc code tableh[]={
0xbf,0x86,0xdb,0xcf,0xe6,0xed,
0xfd,0x87,0xff,0xef,0xf7};
uc a2,a1,a0,count;
ui num;
display(uc,uc,uc);
delay(uc);
void main()
{
	EA=1;
	ET1=1;
	TMOD=0x10;
	TH1=(65536-10000)/256;
	TL1=(65536-10000)%256;
	TR1=1;
	while(1)
	{
		if(count==1)
		{		
		count=0;
		num++;
		if(num==999)num=0;
		if(L4==0)
		{
			delay(60);
			if(L4==0)
			{
				TR1=0;
		        while(!L4)
              	{ display(a2,a1,a0);}
                while(!L4);        
	      	    TR1=1;
             }
		}
		 
		}       
		a2=num/100;
		a1=num%100/10;
		a0=num%100%10;
	    display(a2,a1,a0);    	
	}
}
delay(uc x)
{
	uc i,j;
	for(i=20;i>0;i--)
	for(j=x;j>0;j--);
}
void time1() interrupt 3 using 1
{
    TH1=(65536-10000)/256;
	TL1=(65536-10000)%256;
	count++;
}
display(uc bi,uc si,uc ge)
{
P0=0xff;
wes=1;
wes=0;

P0=tableh[bi];
dus=1;
dus=0;
P0=0xfe;
wes=1;
wes=0;
delay(1);

P0=0xff;
wes=1;
wes=0;

P0=table[si];
dus=1;
dus=0;
P0=0xfd;
wes=1;
wes=0;
delay(1);

P0=0xff;
wes=1;
wes=0;

P0=table[ge];
dus=1;
dus=0;
P0=0xfb;
wes=1;
wes=0;
delay(1);
}