버튼 제어 디지털 파이프

/*****************
 key1  ， key2  ， key3  
*******************/
#include "reg52.h"			 //                    

typedef unsigned int u16;	  //           
typedef unsigned char u8;

sbit LSA=P2^2;
sbit LSB=P2^3;
sbit LSC=P2^4;

sbit k1=P3^1;
sbit k2=P3^0;
sbit k3=P3^2;
sbit k4=P3^3;	 //      

u8 code smgduan[17]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,
					0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};//  0~F  


#define KEY1 1
#define KEY2 2
#define KEY3 3
#define KEY4 4

char keynum;
u8 DisplayData[8];

void delay(u16 i)
{
	while(i--);	
}

//mode=0      1：  
u8 KeyScan(u8 mode)
{
	static u8 keyen=1;
	if(mode==1)
	{
		keyen=1;
	}
	if(keyen==1&&(k1==0||k2==0||k3==0||k4==0))
	{
		delay(1000);  //    
		keyen=0;
		if(k1==0)return KEY1;
		else if(k2==0)return KEY2;
		else if(k3==0)return KEY3;
		else if(k4==0)return KEY4;				
	}
	else if(k1==1&&k2==1&&k3==1&&k4==1)
	{
		keyen=1;
	}
	return 0;	
}

void DigDisplay()
{
	u8 i;
	for(i=0;i<2;i++)
	{
		switch(i)	 //  ，        ，
		{
			case(0):
				LSA=0;LSB=0;LSC=0; break;//   0 
			case(1):
				LSA=1;LSB=0;LSC=0; break;//   1 	
		}
		P0=DisplayData[i];//    
		delay(100); //        	
		P0=0x00;//  
	}
}

void datapros()
{
	u8 key=KeyScan(0);
	switch(key)
	{
		case 1:  keynum++;if(keynum==100)keynum=0; break;
		case 2:  keynum--;if(keynum<=0)keynum=99; break;
		case 3:  keynum=0; break;
		case 4:   break;
	}
	DisplayData[0]=smgduan[keynum%10];
	DisplayData[1]=smgduan[keynum/10];
}

void main()
{	
	while(1)
	{
		datapros();
		DigDisplay();	
	}		
}