smg.c.100826204436

avr基础程序大全

#include <iom16v.h>
#include <macros.h>
#define  uchar unsigned char
#define  uint  unsigned int
//#pragma data:code 
uchar table[10] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
				  
uchar LED_W[8] = {0,1,2,3,4,5,6,7};				   
void delay(uint ms)
{
        uint i,j;
	for(i=0;i<ms;i++)
	   {
	   for(j=0;j<1141;j++);
       }
}

void main()
{
        uchar i,j;
        DDRA=0xff;	
		DDRB=0XFF;
	while(1)
	{
		PORTA = table[i];		 // i 值的 个位数
		PORTB = LED_W[8];		 //点亮第一位数码管
		delay(5);
	
		j++;
		i++;
		if(j == 8)			 //利用 j 值的变化，来控制数码管数值变化间隔的时间
		{
			j = 0;
			i = 0;
		}
	}
}