#include "bsp_key.h"


unsigned char Key_Read()
{
	unsigned int key_new;
	unsigned char Key_Vaule;
	
	P44=0;P42=1;P35=1;P34=1;
	key_new=P3&0X0F;
	P42=0;P44=1;P35=1;P34=1;
	key_new=(key_new<<4)|(P3&0X0F);	
	P35=0;P42=1;P44=1;P34=1;
	key_new=(key_new<<4)|(P3&0X0F);		
	P34=0;P42=1;P35=1;P44=1;
	key_new=(key_new<<4)|(P3&0X0F);		
	
	switch(~key_new)
	{
		case 0x8000:Key_Vaule=4;break;
		case 0x4000:Key_Vaule=5;break;		
		case 0x2000:Key_Vaule=6;break;		
		case 0x1000:Key_Vaule=7;break;	
		
		case 0x0800:Key_Vaule=8;break;
		case 0x0400:Key_Vaule=9;break;		
		case 0x0200:Key_Vaule=10;break;		
		case 0x0100:Key_Vaule=11;break;			
		
		case 0x0080:Key_Vaule=12;break;
		case 0x0040:Key_Vaule=13;break;		
		case 0x0020:Key_Vaule=14;break;		
		case 0x0010:Key_Vaule=15;break;	

		case 0x0008:Key_Vaule=16;break;
		case 0x0004:Key_Vaule=17;break;		
		case 0x0002:Key_Vaule=18;break;		
		case 0x0001:Key_Vaule=19;break;	

		default : Key_Vaule=0;
	}
	return Key_Vaule;
}