LCD 문자열 출력, ATmega128, AVR - 0310

 

 LCD 문자열 출력, ATmega128 

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◈  LCD 문자열 출력, ATmega128, AVR

◈

LCD 문자열 출력, ATmega128, AVR

내용 넣기~~~~

 

 
◆◆ ATmega128 : LCD 문자열 출력  P.263 ◆◆

0310B_LCD_p263.c

0310B_LCD_p263.hex

0310B_LCD_p263.prj

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/*
               LCD 제어             P.263
               // 문자열 입력
               " System Control
                  Suwon ATmega128 "
               0310B_LCD_p263.c                        
*/                                                    

#include <mega128.h>
#include <delay.h>
#define FUNCSET       0x28               // Function Set
#define ENTMODE     0x06                // Entry Mode Set
#define ALLCLR         0x01                // All Clear
#define DISPON          0x0c               // Display On
#define LINE2              0xc0               // 2nd Line Move

void LCD_init(void);
void LCD_String(char flash *);
void Busy(void);
void Command(unsigned char);
void Data(unsigned char);

void main(void)
{
                  LCD_init();
                  LCD_String(" System Control ");                       // 첫번째 라인에 출력
                  Command(LINE2);
                  LCD_String(" Suwon ATmega128 ");                 // 두번째 라인에 출력
                  while(1);
}//end main             

// LCD 초기화                              
void LCD_init(void){
                        DDRD = 0xff;                      // port D
                        PORTD &= 0xfb;                // E = 0
                        delay_ms(15);
                        Command(0x20);
                        delay_ms(5);
                        Command(0x20);
                        delay_us(100);
                        Command(0x20);
                        Command(FUNCSET);
                        Command(DISPON);
                        Command(ALLCLR);
                        Command(ENTMODE);                       
}//endLCD_init                                     

// 문자열 출력 함수
void LCD_String(char flash str[]){
                            char flash *pStr = 0;
                            pStr = str;
                            while(*pStr) Data(*pStr++);
}//endLCD_String                                           

// 인스트럭션 쓰기 함수
void Command(unsigned char byte){
                         Busy();
                        
                         // 인스트럭션 상위 바이트
                         PORTD = ( byte & 0xf0 );                    // 데이터
                         PORTD &= 0xfe;                              // RS = 0, 명령어
                         PORTD &= 0xfd;                             // RW = 0, write
                         delay_us(1);
                         PORTD |= 0x04;                              // E = 1, LCD 동작
                         delay_us(1);
                         PORTD &= 0xfb;                               // E = 0
                        
                         // 인스트럭션 하위 바이트
                         PORTD = (( byte << 4 ) & 0xf0) ;         // 데이터?
                         PORTD &= 0xfe;                                    // RS = 0, 명령어
                         PORTD &= 0xfd;                                    // RW = 0, write
                         delay_us(1);
                         PORTD |= 0x04;                                     // E = 1, LCD 동작
                         delay_us(1);
                         PORTD &= 0xfb;                                     // E = 0
}//endCommand

// 데이터 쓰기 함수
void Data(unsigned char byte){
                 Busy();
                
                 // 데이터 상위 바이트
                 PORTD = ( byte & 0xf0 );                                // 데이터
                 PORTD |= 0x01;                                              // RS = 1, 데이터
                 PORTD &= 0xfd;                                             // RW = 0, write
                 delay_us(1);
                 PORTD |= 0x04;                                              // E = 1, LCD 동작
                 delay_us(1);
                 PORTD &= 0xfb;                                               // E = 0
                
                 // 데이터 하위 바이트
                 PORTD = (( byte << 4 ) & 0xf0 );                      // 데이터 좌로 4 shift
                 PORTD |= 0x01;                                                // RS = 1
                 PORTD &= 0xfd;                                                // RW = 0
                 delay_us(1);          
                 PORTD |= 0x04;                                                 // E = 1
                 delay_us(1);
                 PORTD &= 0xfb;                                                 // E = 0
}//endData     
                                                                                                         
/*
  // Busy Flag Check > 일반적인 BF를 체크하는 거싱 아니라, 일정한 시간 지연을 이용
*/
void Busy(void){
                 delay_ms(2);
}//endBysy                                                                                                                          

 

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◆◆ ATmega128 : LCD 문자열 출력  P.263 동일 출력 (코드단순) ◆◆ 

 

 

0310C_LCD_lib.asm

0310c_lcd_lib.c

0310C_LCD_lib.hex

0310C_LCD_lib.prj

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 /*
                  LCD   문자열 출력       
                  CodeVision AVR 에서 제공하는
                  LCD.lib를 이용한 코드  
                   // 문자열 입력
                   " System Control
                     Suwon ATmega128 "

                  0310C_LCD_lib.c
*/                                         

#include <mega128.h>
#asm
          .equ __lcd_port = 0x12;  //PORTD   // PA = 0x1b, PB = 0x18,  PC = 0x15
#endasm
#include <lcd.h>

void main(void)
{
                  lcd_init(16);
                  lcd_putsf(" SYSTEM CONTROL ");
                  lcd_gotoxy(0,1);
                  lcd_putsf(" SUWON ATMEGA128 ");
                  while(1);
}//end main            

 

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