利用单片机的数码管模拟时钟的显示时间

#include 

#define SEGPORT P0
sbit seg_select = P2^1;        
sbit bit_select = P2^0;          

unsigned char duanma[10] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};               
unsigned char weima[8] = {0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f}; 
unsigned char TempData[8];

unsigned char shi = 20, fen = 54, miao = 55;

void display()
{
	  static unsigned char i = 0;
	  SEGPORT = 0x0;
	  seg_select = 1;
	  seg_select = 0;
	  
	  SEGPORT = 0xff;
	  bit_select = 1;
	  bit_select = 0;
	
	  SEGPORT = TempData[i];
	  seg_select = 1;
	  seg_select = 0;
	  
	  SEGPORT = weima[i];
	  bit_select = 1;
	  bit_select = 0;
	  
		i++;
	
	  if(8 == i)
		{
				i = 0;
    }  
}

void time0_init(void)
{
	  EA = 1;                              //打开总中断
	  TMOD |= 0x01;                        //设置定时器工作方式
	  TH0 = (65536 - 20000) / 256;
	  TL0 = (65536 - 20000) % 256;        //设置定时器初值
	  ET0 = 1;                           //打开定时器中断
	  TR0 = 1;

}

void timer0_isr() interrupt 1
{
	  static unsigned char i = 0;
          TH0 = (65536 - 20000) / 256;
	  TL0 = (65536 - 20000) % 256;    //设置定时器初值，
	  i++;	
	  
		if(50 == i)	
		{
				i = 0;
				miao++;
				if(60 == miao)
				{
			 
						miao = 0;
						fen++;
				  
						if(60 == fen)
						{
								fen = 0;
								shi++;
						  
								if(24 == shi)
								{
										shi = 0;
							  
								}
						}
					}
		}
		
		TempData[0] = duanma[shi / 10];
		TempData[1] = duanma[shi % 10];
		TempData[2] = 0x40;
		TempData[3] = duanma[fen / 10];
		TempData[4] = duanma[fen % 10];
		TempData[5] = 0x40;
		TempData[6] = duanma[miao / 10];
		TempData[7] = duanma[miao % 10];
}

void time1_init(void)
{
          EA = 1;
	  TMOD |= 0x10;
	  TH1 = (65536 - 20000) / 256;
	  TL1 = (65536 - 20000) % 256;
	  ET1 = 1;
	  TR1 = 1;
		
	 
}

void time1_isr() interrupt 3
{
          TH1 = (65536 - 1000) / 256;
	  TL1 = (65536 - 1000) % 256;     
	  display();
		
}               

void main()
{
	 time0_init();
	 time1_init();
	 while(1)
	 {
   
         }
						   
}