AVR_LCD.c

/*
 * new_lcd_hardware.c
 *
 * Created: 2/8/2016 2:43:34 PM
 *  Author: keshab
 */ 
#ifndef F_CPU
# define F_CPU 1000000UL
#endif

#include <avr/io.h>
#include <util/delay.h>

#define LCD_DATA PORTA		//LCD data port
#define ctrl PORTB
#define en PB0		// enable signal
#define rw PB1		// read/write signal
#define rs PB2		//RESET SIGNAL

void LCD_cmd(unsigned char cmd);
void init_LCD(void);
void LCD_write(unsigned char data);

int main(void)
{
	DDRA=0xff;
	DDRB=0x07;
	init_LCD();		// initialization of LCD
	_delay_ms(50);		// delay of 50 mili seconds
	 LCD_write('p');	// function to print string on LCD
    while(1)
    {
    }
	
}
void init_LCD(void)
{
	LCD_cmd(0x38);		// initialization of 16X2 LCD in 8bit mode
	_delay_ms(1);
	
	LCD_cmd(0x01);		// clear LCD
	_delay_ms(1);
	
	LCD_cmd(0x0E);		// cursor ON
	_delay_ms(1);
	
	LCD_cmd(0x80);		// ---8 go to first line and --0 is for 0th position
	_delay_ms(1);
	return;
}
void LCD_cmd(unsigned char cmd)
{
	LCD_DATA=cmd;
	ctrl =(0<<rs)|(0<<rw)|(1<<en);
	_delay_ms(1);
	ctrl =(0<<rs)|(0<<rw)|(0<<en);
	_delay_ms(50);
	return;
}

void LCD_write(unsigned char data)
{
	LCD_DATA= data;
	ctrl = (1<<rs)|(0<<rw)|(1<<en);
	_delay_ms(1);
	ctrl = (1<<rs)|(0<<rw)|(0<<en);
	_delay_ms(50);
	return ;
}