/*---------------------------------------------------------------------------------------*/
/*-----------------------------------99s记数---------------------------------------------*/
#include<reg52.h>
#include<intrins.h>


#define uint unsigned int
#define uchar unsigned char
sbit CLK=P2^5;              /*************时钟***********/
sbit STR=P2^6;              /*************锁存***********/
sbit RData=P2^7;            /*************数据***********/	
void Timer0_Init();



uchar Shi,Temp,TT,Ge;

uchar code Tab[][16]={					
						0xFF,0xFF,0xF8,0x0F,0xF7,0xF7,0xEF,0xFB,0xEF,0xFB,0xF7,0xF7,0xF8,0x0F,0xFF,0xFF,/*"0",0*/
						0xFF,0xFF,0xF7,0xFB,0xF7,0xFB,0xE0,0x03,0xFF,0xFB,0xFF,0xFB,0xFF,0xFF,0xFF,0xFF,/*"1",1*/
						0xFF,0xFF,0xF1,0xF3,0xEF,0xEB,0xEF,0xDB,0xEF,0xBB,0xEE,0x7B,0xF1,0xF3,0xFF,0xFF,/*"2",2*/
						0xFF,0xFF,0xF3,0xE7,0xEF,0xFB,0xEE,0xFB,0xEE,0xFB,0xED,0x77,0xF3,0x8F,0xFF,0xFF,/*"3",3*/
						0xFF,0xFF,0xFF,0x1F,0xFC,0xDF,0xFB,0xDB,0xF7,0xDB,0xE0,0x03,0xFF,0xDB,0xFF,0xFF,/*"4",4*/
						0xFF,0xFF,0xE0,0x67,0xEF,0x7B,0xEE,0xFB,0xEE,0xFB,0xEF,0x77,0xEF,0x8F,0xFF,0xFF,/*"5",5*/
						0xFF,0xFF,0xF8,0x0F,0xF7,0x77,0xEE,0xFB,0xEE,0xFB,0xE7,0x77,0xFF,0x8F,0xFF,0xFF,/*"6",6*/
						0xFF,0xFF,0xE3,0xFF,0xEF,0xFF,0xEF,0x03,0xEC,0xFF,0xE3,0xFF,0xEF,0xFF,0xFF,0xFF,/*"7",7*/
						0xFF,0xFF,0xF1,0xC7,0xEE,0xBB,0xEF,0x7B,0xEF,0x7B,0xEE,0xBB,0xF1,0xC7,0xFF,0xFF,/*"8",8*/
						0xFF,0xFF,0xF8,0xFF,0xF7,0x73,0xEF,0xBB,0xEF,0xBB,0xF7,0x77,0xF8,0x0F,0xFF,0xFF,/*"9",9*/												
					  };

void delay(uchar n)
{
     while(n--);
}

void sendbyteR(uchar bbyte1)            /*74HC595的驱动程序*/
{
	uchar i;
	for(i=0;i<8;i++)
   	{    
		RData=bbyte1&0x80;   
		CLK=1; 
		delay(2);
		CLK=0; 	
		bbyte1<<=1;
		_nop_();
		_nop_();
    } 
}
			  
void main()
{	  	
		uchar i;
		Timer0_Init();
		while(1)
		{		
				for(i=0;i<8;i++)
				{		
						sendbyteR(Tab[Shi][i*2]);
						sendbyteR(Tab[Shi][i*2+1]); 			                               
						P0=i;						              					                                                                                      
				        STR=1; 													
						STR=0;																				                               
						delay(10);     							
				}
				for(i=8;i<16;i++)
				{		
						sendbyteR(Tab[Ge][i*2-16]);  /*因为i=8,i*2=16直接读到数组的第2个数据，因此要减去16*/
						sendbyteR(Tab[Ge][i*2+1-16]); 			                               
						P0=i;						              					                                                                                      
				        STR=1; 													
						STR=0;																				                               
						delay(10);     							
				}
		}
}

void Timer0() interrupt 1
{
	TH0=(65536-50000)/256;
	TL0=(65536-50000)%256;
	TT++;
	if(TT==20)
		{
			TT=0;
			Temp--;
			if(Temp==0)
				{
					Temp=99;
				}
			Shi=Temp/10;
			Ge =Temp%10;
			
		}

}

void Timer0_Init()
{
	TH0=(65536-50000)/256;
	TL0=(65536-50000)%256;
	TMOD=0x01;
	EA=1;
	ET0=1;
	TR0=1;
	Temp=10;
	Ge=0;
	Shi=0;
}