uchar count=0;

void timer_chu();

void main()
{

	uint tt=999;
	allinit();
	
	timer_chu();
	EA=1;
	ET0=1;

	


	/*yi=9;er=9;san=9;*/si=11;wu=11;liu=11;qi=11;ba=11;
	while(1)
	{	
		if(count==20)
		{count=0;tt--;}
		
		yi=tt/100;
		er=tt%100/10;
		san=tt%10;
		
		
		keyscan();
		display1(yi,er);
		display2(san,si);
		display3(wu,liu);
		display4(qi,ba);
	
	}
}

void Timer0() interrupt 1
{
	count++;
}

void timer_chu()//д⣬Ӻ
{
	AUXR &= 0x7F;		//ʱʱ12Tģʽ
	TMOD &= 0xF0;		//öʱģʽ
	TL0 = 0x00;		//öʱֵ
	TH0 = 0x4C;		//öʱֵ
	TF0 = 0;		//TF0־
}
