#include <AT89X52.H>
unsigned char code SEG7[11]={0xC0,/*0*/
       				 		 0xF9,/*1*/
        			 		 0xA4,/*2*/
                             0xB0,/*3*/
                             0x99,/*4*/
                             0x92,/*5*/
                             0x82,/*6*/
                             0xF8,/*7*/
                             0x80,/*8*/
                             0x90,/*9*/
							 0xbf,/*-*/
							 };

unsigned short int tcount;

struct time
{
	unsigned char second;
	unsigned char minute;
	unsigned char hour;
}time1;

void delay(k)
unsigned int k;		  //延時子程序
{
	unsigned char j;
	while((k--)!=0)
	for(j=0;j<125;j++);
}

TimeUpDown(n,x,y)		 //時鐘調(diào)整子程序
unsigned char n,x,y;
{
	if(P1_1==0)
	{
		delay(50);
		if(P1_1==0)
		{
			n++;
			if(n==x)
			n=0;
			while(P1_1==0);
		}
	}

   	if(P1_2==0)
	{
		delay(50);
		if(P1_2==0)
		{
			if(n==0)
			n=y;
			else
			n--;						
			while(P1_2==0);
	   	}
	}
	return n;
}				

void display(DisSecondH,DisSecondL,DisMinutH,DisMinutL,DisHourH,DisHourL)
unsigned char DisSecondH,DisSecondL,DisMinutH,DisMinutL,DisHourH,DisHourL;		  //顯示子程序
{  	
	P0=SEG7[DisSecondH];	//顯示秒鐘的十位
	P2=0x80;
	delay(2);

	P0=SEG7[DisSecondL];	//顯示分鐘的個位
	P2=0x40;
	delay(2);

	P0=0xbf;          		//顯示-
	P2=0x20;
	delay(2);
	
	P0=SEG7[DisMinutH];		//顯示秒鐘的十位
	P2=0x10;
	delay(2);

	P0=SEG7[DisMinutL];		//顯示分鐘的個位
	P2=0x08;
	delay(2);
	
	P0=0xbf;				//顯示-
	P2=0x04;
	delay(2);
	
	P0=SEG7[DisHourH];		//顯示小時的個位
	P2=0x02;
	delay(2);

	if(DisHourL==0)
	P0=0xff;
	else
	P0=SEG7[DisHourL];		//顯示小時的十位
	P2=0x01;
	delay(2);
}

main()
{
	 unsigned char Flag;
	TMOD = 0x01; 
	TH0 = (65536-50000)/256; 
	TL0 = (65536-50000)%256; 
	ET0 = 1; 
	EA = 1;
	

	while(1)
	{ 	
		if(P1_0 == 0)					  //設(shè)置標志位 Flag
		{
			delay(50);
			if(P1_0 == 0)
			{
				TR0 = 0;
				Flag++;
				if(Flag > 3)
				Flag = 0;
			}
			while(P1_0 == 0);	
		}

		switch(Flag)
		{
			case 0:
				TR0=1; 
				display(time1.second%10,time1.second/10,time1.minute%10,time1.minute/10,time1.hour%10,time1.hour/10);
				break;

			case 1:									 //時鐘小時調(diào)整
				TR0=0; 			
			    time1.hour=TimeUpDown(time1.hour,24,23);
				display(10,10,10,10,time1.hour%10,time1.hour/10);
				break;

			case 2:									 //時鐘分鐘調(diào)整
			 	time1.minute=TimeUpDown(time1.minute,60,59);
				display(10,10,time1.minute%10,time1.minute/10,10,10);					
		 		break;

			case 3:									 //時鐘秒調(diào)整
				time1.second=TimeUpDown(time1.second,60,59);
				display(time1.second%10,time1.second/10,10,10,10,10);	
				break;

			default:
				break;
		}

	}
}
	
		

  void t0(void) interrupt 1 using 0   

{
	
	tcount++; 
	if(tcount==10) 
	{ 
		tcount=0; 
	    time1.second++;
	}

	if (time1.second>=60)
   	{
		 time1.second=0;
		 time1.minute++;
	}

	if (time1.minute>=60)
	{
		time1.minute=0;
		time1.hour++;
	}

	if(time1.hour>=24)
		time1.hour=0;

	TH0=(65536-50000)/256;
	TL0=(65536-50000)%256;
}