[Atmega128] CLCD, 4bit모드, Atmega128

참고사이트

http://gongnoob.blog.me/133468759

http://downrg.com/395

이렇게 참고 했는데..

음... 왜 안되지...;;??

=========================================================================수정

음? USBISP 케이블을 한번 뺐다가 끼니까 되넹...? 엥? ㅋㅋ;;

=======================================================================코드

/*

 PA.0 = RS

 PA.1 = RW

 PA.2 = E1

 

 PA.4 = D4

 PA.5 = D5

 PA.6 = D6

 PA.7 = D7

 */ 

#define F_CPU 16000000UL

#include <avr/io.h>

#include <avr/delay.h>

#define RS_H (PORTA |= 0x01) // RS=1

#define RS_L (PORTA &= 0xFE) // RS=0

#define RW_H (PORTA |= 0x02) // RW=1

#define RW_L (PORTA &= 0xFD) // RW=0

#define ENABLE (PORTA |= 0x04) // ENABLE

#define DISABLE (PORTA &= 0xFB) // DISABLE

void LCD_command(char command){

PORTA = (command&0xF0); // send High nibble

RS_L; RW_L; // RS=0 RW=0

ENABLE; // E1 : L->H

_delay_us(1);

DISABLE; // E1 : H->L

PORTA = (command & 0x0F)<<4; // send Low nibble

RS_L; RW_L; // RS=0 RW=0

ENABLE; // E1 : L->H

_delay_us(1);

DISABLE; // E1 : H->L

}

void LCD_data(char data){

_delay_us(100);

PORTA = (data&0xF0); // send High nibble

RS_H; RW_L; // RS=1 RW=0

ENABLE; // E1 : L->H

_delay_us(1);

DISABLE; // E1 : H->L

PORTA = (data&0x0F)<<4; // send Low nibble

RS_H; RW_L; // RS=1 RW=0

ENABLE; // E1 : L->H

_delay_us(1);

DISABLE; // E1 : H->L

}

void LCD_init(void){

DDRA = 0xFF;

PORTA = 0x00;

_delay_ms(40);

LCD_command(0x28); // DL=0(4bit) N=1(2Line) F=0(5x7)

_delay_us(50);

LCD_command(0x0C); // LCD ON, Cursor X, Blink X

_delay_us(50);

LCD_command(0x01); // LCD Clear

_delay_ms(2);

LCD_command(0x06); // Entry Mode

_delay_us(50);

}

void LCD_string(char command, char *string){

LCD_command(command);

while(*string != '\0'){

LCD_data(*string);

string++;

}

}

int main(void){

char string1[16] = "Hello World!";

char string2[16] = "Good Job!";

LCD_init();

    while(1){

LCD_string(0x80+0x00, string1);

_delay_ms(2000);

LCD_command(0x01); // LCD Clear

_delay_ms(2);

LCD_string(0x80+0x40, string2);

_delay_ms(2000);

LCD_command(0x01); // LCD Clear

_delay_ms(2);

}

return 0;

}