#include <STC89C5xRC.H>
#define RELOAD_COUNT 0xF9 //宏定义波特率发生器的载入值 4800
void UartInit(void)		//9600bps@12.000MHz
{
	SCON|=0X50;			//设置为工作方式1
	TMOD|=0X20;			//设置计数器工作方式2
	PCON=0X80;			//波特率加倍
	TH1=RELOAD_COUNT;	//计数器初始值设置
	TL1=TH1;
	EA=1;				//打开总中断
	TR1=1;				//打开计数器
	ES=1;          //打开接收中断                       
}
void Delay100ms()		//@12.000MHz
{
	unsigned char i, j;

	i = 195;
	j = 138;
	do
	{
		while (--j);
	} while (--i);
}
void Unit() interrupt 4//接收中断
{
	int receivedata=SBUF;//储存初值
	receivedata%=10;
	if(receivedata==0) P2=0xff;
	else{
	if(((~P2)&((1<<(receivedata-1))))&(1<<(receivedata-1))) P2|=(1<<(receivedata-1));//输入的值对应的灯已经亮起时，熄灭它
	else P2&=~(1<<(receivedata-1));}//输入的值对应的灯未亮起时，点亮它
	RI=0;//标志位清零
}
void main()
{
	int num;
  UartInit();
	while(1)
	{
		P1=0xf0;
		if(P1!=0xf0)
		{
			if(P1==0x70) num=1;
			if(P1==0xb0) num=5;
			if(P1==0xd0) num=9;
			if(P1==0xe0) num=13;
			P1=0x0f;
			if(P1==0x07) num+=0;
			if(P1==0x0b) num+=1;
			if(P1==0x0d) num+=2;
			if(P1==0x0e) num+=3;
			while(P1!=0x0f);
			Delay100ms();//延时消抖
			SBUF=num;//发送数据
			while(TI==0);//延时处理
			TI=0;
		}
	}
}