#include <avr/io.h>
#define F_CPU 8000000
#define outp(x,y) ((y)=(x))
#define inp(x) (x)
#define LCD_RS_SET   sbi(PORTD,0)
#define LCD_RS_CLEAR   cbi(PORTD,0)
#define LCD_RW_SET   sbi(PORTD,1)
#define LCD_RW_CLEAR   cbi(PORTD,1)
#define LCD_E_SET     sbi(PORTD,2)
#define LCD_E_CLEAR    cbi(PORTD,2)
#define LCD_LIGHT_SET  sbi(PORTD,3)
#define  LCD_LIGHT_CLEAR  cbi(PORTD,3)
#define sbi(PORTX,bitX)PORTX |= (1<<bitX)
#define cbi(PORTX,bitX)PORTX &= ~(1<<bitX)
 
 

 
 
 
 

unsigned char display_data1[]="  HANKYONG ";
unsigned char display_data2[]="  HAMHAMHAM ";
 

 
 
 
 
void delay(unsigned int i)
{
while(--i);

}

void lcd_busy(void)

{
 

unsigned char busy_data;
busy_data=0;
LCD_E_CLEAR;
outp(0x00, DDRB);
do{

LCD_RS_CLEAR;
LCD_RW_SET;
LCD_E_SET;
busy_data=inp(PINB);
LCD_E_CLEAR;
}while(busy_data & 0x80);
outp(0xFF,DDRB);
}

void lcd_enable(void)
{
LCD_E_SET;
delay(100);
LCD_E_CLEAR;
}

void lcd_func_set(void)
{
LCD_RW_CLEAR;
LCD_RS_CLEAR;
outp(0x38, PORTB);
lcd_enable();

}

void lcd_command(unsigned char lcd_data)
{
lcd_busy();
delay(1000);
LCD_RW_CLEAR;
LCD_RS_CLEAR;
outp(lcd_data,PORTB);
lcd_enable();
}
 
void lcd_init(void)
{
LCD_E_CLEAR;
delay(50000);
lcd_func_set();
delay(10000);
lcd_func_set();
delay(1000);
lcd_func_set();
delay(1000);
 
lcd_command(0x38);
lcd_command(0x0C);
lcd_command(0x01);
lcd_command(0x06);
}

void lcd_write_char(unsigned char lcd_data)
{

 lcd_busy();
 delay(1000);
 LCD_RW_CLEAR;
 LCD_RS_SET;
 outp(lcd_data, PORTB);
lcd_enable();
}

void lcd_display(void)
{

unsigned char i;
 
LCD_LIGHT_SET;
lcd_command(0x02);
for(i=0;i<16;i++){
lcd_write_char(display_data1[i]);
}
lcd_command(0xC0);
for(i=0;i<16;i++){
lcd_write_char(display_data2[i]);

   }
 
}
 
int main(void)
{
 
unsigned char b=0x01, d=0;
 DDRC=0xff; 
while(1)
 {
  PORTC=b; 
  delay(100); 
        
  if(d==0) 
  { 
   b<<=1; 
   if(b==0x00)
   {
    b=0x80;
    d=1; 
   }
  }
  
  else
  {
   b>>=1;
   if(b==0x00)
   {
    b=0x01;
    d=0; //방향전환
   }
  } 
 

 {
   outp(0xFF ,DDRB);
   outp(0x0F ,DDRD);
   outp(0x00 ,PORTD);
 
   lcd_init();
   lcd_display();
 }
}
} 
 
 
 
실행시키면 led동작도 잘되고 다 좋은데 lcd부분이 깜빡깜빡거려요 lcd가 안깜빡이게 어떻게 하면될까요? ㅜㅡ