test03.c

8051单片机学习源码 包括定时器、键盘、液晶显示等

#include<reg52.h>
#define uchar unsigned char
#define ul unsigned long

sbit dula=P2^6;
sbit wela=P2^7;

uchar code tabledu[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71};

uchar code tablewe[]={
0x01,0x02,0x04,0x08,
0x10,0x20  
};

uchar temp;
ul n;


void delay(uchar);
void display(uchar,uchar,uchar);

void main()
{
 while(1)
 		{
			
		    P3=0xfe;    
			temp=P3;
			temp=temp&0xf0;
				//-----------------------------;
				 if(temp!=0xf0)
				 	{delay(20);
					if(temp!=0xf0)
					switch(temp)
						{   
						    case 0xe0:n=1;n*=n;break;
							case 0xd0:n=2;n*=n;break;
							case 0xb0:n=3;n*=n;break;
							case 0x70:n=4;n*=n;break;
						}
					while(temp!=0xf0)//detect losing hand
						{
						  	temp=P3;
						    temp=temp&0xf0;
						}


					}
		    P3=0Xfd;    
			temp=P3;
			temp=temp&0xf0;
				//-----------------------------
				 if(temp!=0xf0)
				 	{delay(20);
					if(temp!=0xf0)
					switch(temp)
						{   
						    case 0xe0:n=5;n*=n;break;
							case 0xd0:n=6;n*=n;break;
							case 0xb0:n=7;n*=n;break;
							case 0x70:n=8;n*=n;break;
						}
								
						while(temp!=0xf0)//detect losing hand
						{
						  	temp=P3;
						    temp=temp&0xf0;
						}
					}
		    P3=0Xfb;    
			temp=P3;
			temp=temp&0xf0;
				//-----------------------------
				 if(temp!=0xf0)
				 	{delay(20);
					if(temp!=0xf0)
					switch(temp)
						{   
						    case 0xe0:n=9;n*=n;break;
							case 0xd0:n=10;n*=n;break;
							case 0xb0:n=11;n*=n;break;
							case 0x70:n=12;n*=n;break;
						}
			       while(temp!=0xf0)//detect losing hand
						{
						  	temp=P3;
						    temp=temp&0xf0;
						}
					}
		    P3=0Xf7;    
			temp=P3;
			temp=temp&0xf0;
				//-----------------------------
				 if(temp!=0xf0)
				 	{delay(20);
				    if(temp!=0xf0)
					switch(temp)
						{   
						    case 0xe0:n=13;n*=n;break;
							case 0xd0:n=14;n*=n;break;
							case 0xb0:n=15;n*=n;break;
							case 0x70:n=16;n*=n;break;
						}
					while(temp!=0xf0)//detect losing hand
						{
						  	temp=P3;
						    temp=temp&0xf0;
						}
					}  
		display(n/100,n%100/10,n%10);
		}//while(1)
	
}

void display(uchar b,uchar s,uchar g)
{
 P0=0x00;
 wela=1;
 wela=0;
 P0=~tabledu[b];
 dula=1;
 dula=0;
 P0=tablewe[0];
 wela=1;
 wela=0;
 delay(5);
//---------
 P0=0x00;
 wela=1;
 wela=0;
 P0=~tabledu[s];
 dula=1;
 dula=0;
 P0=tablewe[1];
 wela=1;
 wela=0;
 delay(5);
 //--------------
  P0=0x00;
 wela=1;
 wela=0;
 P0=~tabledu[g];
 dula=1;
 dula=0;
 P0=tablewe[2];
 wela=1;
 wela=0;
 delay(5);
}



void delay(uchar x)
{uchar a,b;
 for(a=x;a>0;a--)
 	for(b=255;b>0;b--);
}