example3.c

AVR单片机C语言编程及应用实例 适合初学者的学习研究 其中包含Atmega16中文资料及Protel部分电路图

#include<iom16v.h>
#include<macros.h>
#define uchar unsigned char
#define uint unsigned int
uchar table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d, 0x07,
		           0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
void delay(uint ms)
{
        uint i,j;
	for(i=0;i<ms;i++)
	   {
	   for(j=0;j<1141;j++);
       }
}
void show(uchar j,uchar k)
{
    PORTA|=BIT(3);
	PORTB=table(j);
	PORTA&=~BIT(3);
	PORTB=0XFF;
	PORTB&=~BIT(K)
	PORTA|=BIT(4)
	PORTA&=~BIT(4)
	delay (50);
}
void main()
{
     uchar i,j;
	 DDRA=0xff;
	 DDRB=0xff;
	 while(1)
	 {
	     for(i=0;i<3;i++)
		   show(i,i)
	 }
}