Thank u Sir…
This is the final code and its working…
// Program to interface LCD in 4 bit mode with AVR microcontroller
//#define F_CPU 12000000UL
#include<avr/io.h>
#include<util/delay.h>
#include<inttypes.h>
#define rs PD3
#define rw PD6
#define en PB4
void lcd_init(void);
void dis_cmd(char);
void dis_data(char);
void lcdcmd(char);
void lcddata(char);
int main(void)
{
unsigned char data0[11]=”JAI”;
unsigned char data1[10]=”BALAYYA”;
int i=0;
DDRA=0xFF;
DDRD=0xFF; //modified
DDRB=0xFF; //modified
lcd_init();
while(data0!=’ ’)
{
dis_data(data0);
_delay_ms(200);
i++;
}
dis_cmd(0xC5);
i=0;
while(data1!=’ ’)
{
dis_data(data1);
_delay_ms(200);
i++;
}
while(1);
}
void lcd_init() // fuction for intialize
{
dis_cmd(0x02); // to initialize LCD in 4-bit mode.
dis_cmd(0x28); //to initialize LCD in 2 lines, 5X7 dots and 4bit mode.
dis_cmd(0x0C);
dis_cmd(0x06);
dis_cmd(0x83);
}
void dis_cmd(char cmd_value)
{
char cmd_value1;
cmd_value1 = (cmd_value>>4) & 0x0F; //mask lower nibble because PA4-PA7 pins are used.
lcdcmd(cmd_value1); // send to LCD
cmd_value1 = ((cmd_value) & 0x0F); //shift 4-bit and mask
lcdcmd(cmd_value1); // send to LCD
}
void dis_data(char data_value)
{
char data_value1;
data_value1=(data_value>>4)&0x0F;
lcddata(data_value1);
data_value1=((data_value)&0x0F);
lcddata(data_value1);
}
void lcdcmd(char cmdout)
{
PORTB=cmdout;
PORTD&=~(1<<rs);
PORTD&=~(1<<rw);
PORTB|=(1<<en);
_delay_ms(1);
PORTB&=~(1<<en);
}
void lcddata(char dataout)
{
PORTB=dataout;
PORTD|=(1<<rs);
PORTD&=~(1<<rw);
PORTB|=(1<<en);
_delay_ms(1);
PORTB&=~(1<<en);
}