#include <config.h>
uchar code seg_table[] =						//ÊýÂë¹Ü¶ÎÂë 
{
	0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,
	0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,
	0xbf,~0xbf
}; 
void display_key(unsigned char num)
{
	P0=seg_table[num];
    dula=1;
    dula=0;
    wela=1;
	P0=~0xbf;    
    wela=0;		
}
void delay_key(unsigned char i)		//ÑÓʱ³ÌÐò
{ 
	uchar j,k;
  	for(j=i;j>0;j--)
    	for(k=125;k>0;k--);
}

void key_main()
{	
	uchar temp,key;
	system_init();
  	while(message=='4')
  	{
	    P3=0xfe;
	    temp=P3;
	    temp=temp&0xf0;
	    if(temp!=0xf0)
    	{
	      	delay_key(10);
	      	if(temp!=0xf0)
	      	{
		        temp=P3;
		        switch(temp)
        		{
	          		case 0xee: key=16;break;
	          		case 0xde: key=1;break;
	          		case 0xbe: key=2;break;		
	          		case 0x7e: key=3;break;
         		}
         		while(temp!=0xf0)
         		{
		           	temp=P3;
		           	temp=temp&0xf0;
		           	beep=0;
         		}
         		beep=1;
        		display_key(key);
         		//P1=0xfe;
      		}
    	}
	    P3=0xfd;
	    temp=P3;
	    temp=temp&0xf0;
	    if(temp!=0xf0)
    	{
      		delay_key(10);
      		if(temp!=0xf0)
      		{
	       		temp=P3;
	        	switch(temp)
	        	{
		          	case 0xed: key=4;break;
		          	case 0xdd: key=5;break;
		          	case 0xbd: key=6;break;
	          		case 0x7d: key=7;break;
	         	}
	         	while(temp!=0xf0)
	         	{
		           	temp=P3;
		           	temp=temp&0xf0;
		           	beep=0;
	         	}
	         	beep=1;
	         	display_key(key);
	         	//P1=0xfc;
      		}
      	}
	    P3=0xfb;
	    temp=P3;
	    temp=temp&0xf0;
	    if(temp!=0xf0)
	    {
	      	delay_key(10);
	      	if(temp!=0xf0)
	      	{
	        	temp=P3;
	        	switch(temp)
	        	{
	          		case 0xeb: key=8;break; 			
			        case 0xdb: key=9;break;			
			        case 0xbb: key=10;break;			
			        case 0x7b: key=11;break;
	         	}
	         	while(temp!=0xf0)
	         	{
	           		temp=P3;
	           		temp=temp&0xf0;
	           		beep=0;
	         	}
	         	beep=1;
	         	display_key(key);
				//P1=0xf8;
      		}
      	}
	    P3=0xf7;
	    temp=P3;
	    temp=temp&0xf0;
	    if(temp!=0xf0)
	    {
	    	delay_key(10);
	      	if(temp!=0xf0)
	      	{
	        	temp=P3;
	        	switch(temp)
	        	{
			        case 0xe7: key=12;break; 
			        case 0xd7: key=13;break;
			        case 0xb7: key=14;break;
			        case 0x77: key=15;break;
	         	}
	         	while(temp!=0xf0)
	         	{
	           		temp=P3;
	           		temp=temp&0xf0;
	           		beep=0;
	         	}
	         	beep=1;
	        	display_key(key);
				//P1=0xf0;
      		}
    	}
	} 
}