*소스 코드 오류가뜨는데;; 무엇이 잘못됫는지 모르겠습니다.. 조언 부탁드리겠습니다
#include<mega128.h>
#include<dealy.h>
#define SIZE 500
     
void PB_LShift(void)
{    
     Byte Led;
     int i;
     Led = 0xfe;
     for(i=0;i<8;i++)
     {
        delay_ms(SIZE);
        PORTB = LED;
        LED = (LED<<1)|0x01;
     }  
}
void PB_RShift(void)
{
     Byte Led;
     int i;
     LED=0x7f;
     for(i=0;i<8;i++)
     {  
        delay_ms(SIZE);
        PORTB = LED;
        LED = (LED>>1)|0x80;
     }
}  
     
void PB_LEDOnOff(void)
{
      Byte LED;
      int i;
      for(i=0;i<3;i++)  
      {
         LED = 0xff;
         delay_ms(SIZE);
         PORTB = LED;
         LED = 0x00;
         delay_ms(SIZE);
         PORTB=LED;
      }  
}
PB_LEDSwitch(void)
{
      Byte LED;
      int i;
      for(i=0;i<3;i++)
      {
         LED = 0xf0;
         delay_ms(SIZE);
         PORTB = LED;
         LED = 0x0f;
         delay_ms(SIZE);
         PORTB=LED; 
      }
}      
     
int main(void)
{
   byte key;
   DDRB = 0xff;
   DDRD = 0x0f;
   while(1)
   { 
     key = (PIND & oxf0);
      switch(key)
       {
           case 0xe0:
               PB_LShift();
               delay_ms(SIZE);   
                
           case 0xd0:
               PB_RShift();
               delay_ms(SIZE); 
           case 0xb0:
               PB_LEDOnOff();
               delay_ms(SIZE);           
             
           case 0x70:
                PB_LEDSwitch();
                delay_ms(SIZE);             
                      
         }
     } 
 }