io口._c

基于AVR实验平台下ATMega128芯片实习作业

#include <iom128v.h>
void delay_1ms(void)         
 {
   unsigned int i;
   for (i=0;i<2286;i++);
  }
void delay_nms(unsigned int n)  
{     unsigned int i=0;
   for (i=0;i<n;i++)
   delay_1ms();
  }
void main()  
{unsigned char a;
 DDRA=0x00;
 DDRC=0X00;
 DDRE=0X00;
 DDRB=0x01;
 DDRD=0X01;
 DDRF=0X01;
 while(1)
 {
if((PINA & 0x01)==0)
{

  delay_nms(10);
  }
else PORTB=0XFF;

if((PINC& 0x01)==0)
{
  PORTD=~PORTD;
  delay_nms(10);
  }
else PORTD=0XFF;
if((PINE & 0x01)==0)
{
  PORTF=~PORTF;
  delay_nms(10);
  }
else PORTF=0XFF;
}
}