基于51单片机的篮球计分【LCD1602,正计时】（仿真）

bit rs=P1^0;	 //1602数据/命令选择引脚 
sbit rw=P1^1;	 //1602读写引脚	         
sbit e =P1^5;	 //1602使能引脚         

sbit s1=P2^0;//按钮
sbit s2=P2^1;
sbit s3=P2^2;
sbit s4=P2^3;
sbit s5=P2^4;
sbit s6=P2^5;
sbit s7=P2^6;
sbit s8=P2^7;

uchar time=0,start=0;//系统变量
uchar disp[]="T00:00 A:B 00:00";
uchar fen=0,miao=0,sec=0;//计时
uchar fena=0,fenb=0;//分数
uchar num=0;
//延时
void delay_uint(uint i)
{
	while(i--);
}
//1602命令函数
void write_com(uchar com)
{
	e=0;
	rs=0;
	rw=0;
	P0=com;
	delay_uint(20);
	e=1;
	delay_uint(20);
	e=0;
}

//1602写数据函数
void write_data(uchar dat)
{
	e=0;
	rs=1;
	rw=0;
	P0=dat;
	delay_uint(20);
	e=1;
	delay_uint(20);
	e=0;	
}
//改变液晶中某位的值
void write_string(uchar hang,uchar add,uchar *p)
{
	if(hang==1)   
		write_com(0x80+add);
	else
		write_com(0x80+0x40+add);
		while(1)
		{
			if(*p == '�')  break;
			write_data(*p);
			p++;
		}	
}

//初始化1602液晶 
void init_1602()
{
	write_com(0x38);						//数据总线为8位，显示2行，5x7点阵
	write_com(0x0c);						//开显示，有光标，光标闪烁
	write_com(0x06);						//光标自动右移
	delay_uint(1000);						//等待设置完成
}
//主函数
void main()
{
	init_1602();
	TMOD|=0X01;
	TH0=0X3C;
	TL0=0XB0;	
	ET0=1;//打开定时器0中断允许
	EA=1;//打开总中断
	TR0=1;//打开定时器
	while(1)
	{
		if(start==1)//计分
		{
			if(!s1)	//A队加分
			{
				if(fena<99)
					fena++;
				if(fena==11)
				{
					num++;start=2;
					fena=0;fenb=0;
					switch(num)
					{
						case 1:write_string(1,0,"1Awin");break;
						case 2:write_string(1,5,"2Awin");break;
						case 3:write_string(1,10,"3Awin");
					}
					if(num==3)
						start=0;
				}
				while(!s1);
			}
			if(!s5)	//A队减分
			{
				if(fena>0)
					fena--;
				write_string(1,0,"    ");
				while(!s5);
			}
			if(!s2)	//B队加分
			{
				if(fenb<99)
					fenb++;
				if(fenb==11)
				{
					num++;start=2;
					fenb=0;fena=0;
					switch(num)
					{
						case 1:write_string(1,0,"1Bwin");break;
						case 2:write_string(1,5,"2Bwin");break;
						case 3:write_string(1,10,"3Bwin");
					}
					if(num==3)
						start=0;
				}
				while(!s2);
			}
			if(!s6)	//B队减分
			{
				if(fenb>0)
					fenb--;
				while(!s6);
			}
		}
		//开始
		if(!s3)
		{
			start=1;
		}
		//暂停
		if(!s4)
		{
			if(start==1)
			{
				start=2;
			}
			else
			{
				if(start==2)
				{
					start=1;
				}
			}
			while(!s4);
		}
		//清零
		if(!s7)
		{
			if(start==0)
			{
				miao=0;
				fen=0;
				fena=0;
				fenb=0;
				write_string(1,0,"               

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