main.c

这是一个164的C程序

#include<avr/io.h>
#include<avr/delay.h>
#define uchar unsigned char

char led[]={0x11,0xD7,0x32,0x92,0xD4,0x98,0x18,0xD3,0x10,0x90,0xff};  // 0 1 2 3 4 5 6 7 8 9 灭

//======================   移位子程序  ==================
void shift(uchar b)
{
   uchar i;
   b=led[b];
   if (b==0xff)
      b=b&0xfe;
   PORTA=(0<<PA2);
   for(i=0;i<8;i++)
     {
	 if ((b<<i) & 0x80)
	    PORTA = (1<<PA0);
		
	 else
        PORTA = (0<<PA0);
		
	  PORTA = PORTA|(1<<PA1);
	  PORTA = PORTA&(0<<PA1);	 
   }
}

//====================  延时程序  ======================
void delay(void)
{
     uchar i=0;
	 for (i=0; i<125; i++) 
	 _delay_ms(1);
}


//=========================   主函数    ================
int main(void)
{
   int i=0;
   int sec=0,min=0,hour=0;
   PORTA=0XFF;
   DDRA=0Xff;
 
   // 清除乱码  
   for (i=0; i<8; i++)
   {
	 shift(10);	   
   }
   
   //开始显示数据
   while (1)
   {
    for (hour=0;  hour<24; hour++)
	{
       shift(hour%10);
       shift(hour/10);
       shift(10);
	   
	   for (min=0; min<60; min++)
	   {
         shift(min%10);
         shift(min/10);
         shift(10);
		 
	     for (sec=0; sec<60; sec++)
	     {
		   shift(hour%10);
           shift(hour/10);
           shift(10);
           shift(min%10);
           shift(min/10);
           shift(10);
           shift(sec%10);
           shift(sec/10);
	       delay();
	     }//end sec`for
		 
	     if (sec>=60)
	     {
	       sec=0;
	     }
		 
	   }//end min`for
	   
	   if (min>=60)
	   {
	       min=0;
	   }
	   
	}//end hour'for
	
	if (hour>=24)
	{
	  hour=0;
	}
	
  }//end while 
   
}