Thank u Sir…This is the

[BhanuKiran Chaluvadi]

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);

}