#include <io8515.h>          
#define uchar unsigned char  
#define uint unsigned int
void delay(uint t)
{
 uint i;
 for (i=0;i<t;i++)
    ;
}
void init_disp(void)         
{
DDRB=0xff;
DDRD=0xff;
PORTB=0x7f;                  
}
void scan(void)              
{
 uchar i,j;
 for (i=0;i<6;i++)            
   {
    j=150;
    do
      {
       PORTD=~(0x01<<i);
       delay(150);                
       PORTD=0xff;
       delay(2100);                
       }
    while(--j);
   }
}
void main(void)                  
{
 init_disp();                   
 for(;;)
 scan();                         
}