//4位數(shù)碼管從左到右，動(dòng)態(tài)顯示1 2 3 4，晶振選擇8M
//測(cè)試:ok
//頭文件
#include <iom16v.h>
#include <macros.h>
unsigned char data[4]={1,2,3,4};//顯示字符
//函數(shù)說(shuō)明
void delay_1ms(void);//
void delay_nms(unsigned int n);//
unsigned char decode(unsigned char i);//
void port_init(void);//
 //延時(shí)1ms子函數(shù)
void delay_1ms(void)
{	 
	 unsigned int i;
	 for(i=1142;i>0;i--)
	 ;
}
 //延時(shí)nms子函數(shù)
void delay_nms(unsigned int n)
{	 
	 for(;n>0;n--)
	 	delay_1ms();
;
}
//端口初始化
void port_init(void)
{	 
	 DDRA=0XFF;//A口 是段選
	 PORTA=0X00;
	 DDRD=0XFF;//D口是位選，從左到右，依次為PD0,PD1,PD2,PD3
	 PORTD=0X00;
}
//譯碼子函數(shù)
unsigned char decode(unsigned char i)
{	 
	 switch(i)
	 {
	      case 0:return(0x3F);
		  case 1:return(0x06);
		  case 2:return(0x5B);
		  case 3:return(0x4F);
		  case 4:return(0x66);
		  case 5:return(0x6D);
		  case 6:return(0x7D);
		  case 7:return(0x07);
		  case 8:return(0x7F);
		  case 9:return(0x6F);
		  default:return(0x3F);
	 }
}
/********動(dòng)態(tài)顯示函數(shù)********/
void display(unsigned char *p)
{	 
	 unsigned char i;
	 for(i=0;i<4;i++)
	 {    
	 	  PORTD=~(1<<i);    
		  PORTA=decode(p[i]); 
		  delay_nms(2);                 
     }
}
//主函數(shù)
void main(void)
{	
	 unsigned char i;
	 port_init();
	 while(1)
	 {
	  	 display(data);
	 }
}