键盘.c

自己做的单片机Proteus仿真实例

#include<reg51.h>
#define uchar unsigned char
#define uint unsigned int
sbit key1=P1^0;
sbit key2=P1^2;
sbit key3=P1^4;
sbit key4=P1^6;
sbit seg0=P2^6;
sbit seg1=P2^7;
char num,temp;
uchar code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
void delayms(uint x)
{
       uint i,j;
	   for(i=x;i>0;i--)
	       for(j=110;j>0;j--);
}
void display(uchar date)
{
       uchar shi,ge;
	   shi=date/10;
	   ge=date%10;

	   P0=0x00;
	   seg0=0;
	   P0=table[ge];
	   delayms(5);
	   seg0=1;

	   P0=0x00;
	   seg1=0;
	   P0=table[shi];
	   delayms(5);
	   seg1=1;

}
void init()
{
	   seg0=1;
	   seg1=1;
       TMOD=0x01;
	   TH0=(65536-50000)/256;
	   TL0=(65536-50000)%256;
	   EA=1;
	   ET0=1;
}
void keyscan()
{
       if(key1==0)
	   {
	       delayms(10);
		   if(key1==0);
		   {
		          num++;
				  if(num==60)
				       num=0;
				  while(!key1);
			}
		}
		if(key2==0)
	   {
	       delayms(10);
		   if(key2==0);
		   {
		          num--;
				  if(num<0)
				       num=59;
				  while(!key2);
			}
		}
		if(key3==0)
	   {
	       delayms(10);
		   if(key3==0);
		   {  
				  num=0;
				  while(!key3);
			}
		}
		if(key4==0)
	   {
	       delayms(10);
		   if(key4==0);
		   {
		          TR0=~TR0;
				  while(!key4);
			}
		}
}
void main()
{
       init();
	   while(1)
	   {
	          keyscan();
			  display(num);
		}
}
void ser() interrupt 1
{
       TH0=(65536-50000)/256;
	   TL0=(65536-50000)%256;
	   temp++;
	   if(temp==20)
	   {
	         temp=0;
			 num++;
			 if(num==60)
			   	  num=0;
		}
}