try this code…..
#include<avr/io.h>
#include <avr/interrupt.h>
#include <inttypes.h>
#include <util/delay.h>
#define First_Line 0x80
#define Second_Line 0xc0
#define Curser_On 0x0f
#define Curser_Off 0x0c
#define Clear_Display 0x01
#define Data_Port PORTD
#define enable PORTC |= 0x80
#define disable PORTC &= ~0x80
#define data_mode PORTC |= 0x40
#define cmd_mode PORTC &= ~0x40
void Lcd4_Init();
void Lcd4_Command(unsigned char);
void Lcd4_Write(unsigned char,unsigned char);
void Lcd4_Display(unsigned char,const unsigned char*,unsigned int);
void Delay(unsigned int);
unsigned char Lcd_com1,Lcd_com2,Lcd_Temp;
void main()
{
cli();
DDRC=0xff;
DDRD=0xff;
sei();
Lcd4_Init();
while(1)
{
Lcd4_Display(0x80,”welcome to atmga”,16);
Lcd4_Display(0xc0,”welcome to atmga”,16);
}
}
void Lcd4_Init()
{
Lcd4_Command(0x38);
Lcd4_Command(0x02); //return home
Lcd4_Command(0x28); //to select function set
Lcd4_Command(0x06); //entry mode set
Lcd4_Command(0x0c); //display on
Lcd4_Command(0x01); //clear display
}
void Lcd4_Display(unsigned char com,const unsigned char *word,unsigned int n)
{
unsigned char Lcd_i;
for(Lcd_i=0;Lcd_i<n;Lcd_i++)
{
Lcd4_Write(com+Lcd_i,word[Lcd_i]);
}
}
void Lcd4_Command(unsigned char com)
{
Lcd_com1 = com & 0xf0;
Lcd_com2 = com & 0x0f;
Lcd_com2 = Lcd_com2<<4;
// disable;
//sel command reg
Lcd_Temp = Data_Port & 0x0f;
Data_Port=Lcd_Temp | Lcd_com1;
cmd_mode; //send com to po
enable; //clock
_delay_ms(5);
disable;
_delay_ms(5);
Lcd_Temp = Data_Port & 0x0f;
Data_Port=Lcd_Temp | Lcd_com2;
cmd_mode; //send com to po
enable; //clock
_delay_ms(5);
disable;
_delay_ms(5);
}
void Lcd4_Write(unsigned char com,unsigned char dat)
{
Lcd4_Command(com);
_delay_ms(5);
Lcd_com1 = dat & 0xf0;
Lcd_com2 = dat & 0x0f;
Lcd_com2 = Lcd_com2<<4;
// disable;
//sel data reg
Lcd_Temp = Data_Port & 0x0f;
Data_Port=Lcd_Temp | Lcd_com1;
data_mode; //send com to po
enable; //clock
_delay_ms(5);
disable;
_delay_ms(5); //sel data reg
Lcd_Temp = Data_Port & 0x0f;
Data_Port=Lcd_Temp | Lcd_com2;
data_mode; //send com to po
enable; //clock
_delay_ms(5);
disable;
cmd_mode;
_delay_ms(5);
}
void Delay(unsigned int del)
{
while(del–);
}