/*****************************************************************************
名     稱：“jianpan02.c”

Copyright：鴕鳥電子工作室  hrbeu  P.R.C.

功     能：在MINI實驗板上，按下矩陣鍵盤的16個按鍵，分別顯示0~F

作     者：彪哥&東方未晞

日     期：2008年9月1日

*****************************************************************************/
#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit dula=P2^4;
sbit wela=P2^6;
sbit p23=P2^3;
sbit p25=P2^5;

uchar code table[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71};
uchar temp,num;
delay(uchar);
display(uchar);
void main()
{
	while(1)
	{
		P1=0xfe;
		temp=P1;
		temp=temp&0xf0;
		if(temp!=0xf0)
		 {
			delay(50);
			if(temp!=0xf0)
			 {
				switch(temp)
				{
					case 0xe0: num=0;
						break;
					case 0xd0: num=1;
						break;
					case 0xb0: num=2;
						break;
					case 0x70: num=3;
						break;
				
				}
			 }
		 }

		P1=0xfd;
		temp=P1;
		temp=temp&0xf0;
		if(temp!=0xf0)
		 {
			delay(50);
			if(temp!=0xf0)
			 {
				switch(temp)
				{
					case 0xe0: num=4;
						break;
					case 0xd0: num=5;
						break;
					case 0xb0: num=6;
						break;
					case 0x70: num=7;
						break;
				
				}
			 }
		 }

		P1=0xfb;
		temp=P1;
		temp=temp&0xf0;
		if(temp!=0xf0)
		 {
			delay(50);
			if(temp!=0xf0)
			 {
				switch(temp)
				{
					case 0xe0: num=8;
						break;
					case 0xd0: num=9;
						break;
					case 0xb0: num=10;
						break;
					case 0x70: num=11;
						break;
				
				}
			 }
		 }

		P1=0xf7;
		temp=P1;
		temp=temp&0xf0;
		if(temp!=0xf0)
		 {
			delay(50);
			if(temp!=0xf0)
			 {
				switch(temp)
				{
					case 0xe0: num=12;
						break;
					case 0xd0: num=13;
						break;
					case 0xb0: num=14;
						break;
					case 0x70: num=15;
						break;
				
				}
			 }
		 }
     display(num);
	}
}

delay(uchar x)
{
	uchar a,b;
	for(a=x;a>0;a--)
	 for(b=200;b>0;b--);
}
display(uchar num1)
{
    p23=0;
	p25=0;
	P0=table[num1];
	dula=1;
	dula=0;	
	P0=0x00;
	wela=1;
	wela=0;
}