readwriteport.c

单片机开发资料光盘-双龙-686M.zip

#include <io8515.h> 
void main(void)
{
 unsigned char  achar;
 DDRB = 0xFF; 
 DDRD = 0x00; 
 PORTD= 0x00; 
 for(;;) 
    {
     achar = PIND; 
	 PORTB = achar; 
    }
}