RS PORTC0
RW PORTC1
E PORTC2
PD0~7 PORTA에 연결하였습니다
몇일동안 구현중인데....초기화가 안 되네요...
Hello라고 출력되는 소스 좀 주세용..ㅠㅠ
 
//
 
#define F_CPU 16000000
#include <avr/io.h>
#include <util/delay.h>

#define LINE1 0x80
#define LINE2 0xC0

//데이터=PC, RS=PE7, RW=PE6, E=PE5
// PORTE 76 5
#define CMD_WRITE   0x00 // Rs=0    R/W=0    E=0
#define DATA_WRITE  0x80 // Rs=1    R/W=0    E=0
#define LCD_EN      0x20

void LCD_cmd_write(char cmd){
  PORTE=CMD_WRITE; PORTB=cmd;
  PORTE^=LCD_EN; _delay_us(10); PORTE^=LCD_EN;
  _delay_ms(3);
}

void LCD_data_write(char data){
  PORTE=DATA_WRITE; PORTB=data;
  PORTE^=LCD_EN; _delay_us(10); PORTE^=LCD_EN;
  _delay_us(100);
}

void init_LCD(void){
  _delay_ms(150);
  LCD_cmd_write(0x30); LCD_cmd_write(0x30);
  LCD_cmd_write(0x30); LCD_cmd_write(0x38);
  LCD_cmd_write(0x01); LCD_cmd_write(0x0C);
  LCD_cmd_write(0x14); LCD_cmd_write(0x06);
}

void LCD_wr_string(char d_line, char *lcd_str){
  LCD_cmd_write(d_line);
  while(*lcd_str != '\0'){ LCD_data_write(*lcd_str); lcd_str++; }
}

int main(void){
  DDRB=0xFF; PORTB=0xFF; // LCD DATA 
  DDRE=0xFF; PORTE=0x00; // LCD Control
  init_LCD();
  LCD_wr_string(LINE1, " circuitsmanual ");
  LCD_wr_string(LINE2, " naver.cafe     ");
  while(1);
  return 1;
}
AVRStudio 소스지만 IAR 용으로 변환 하는것이 어렵지 않을 겁니다. 
 
참고하세요