code_LCD.c

#include <lpc214x.h>
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>

#define IR (IO1PIN & (1<<24))

void delay_ms(uint16_t j) /* Function for delay in milliseconds  */
{
    uint16_t x,i;
	for(i=0;i<j;i++)
	{
    for(x=0; x<2000; x++);    /* loop to generate 1 millisecond delay with Cclk = 60MHz */
	}
}

void LCD_CMD(char command)
{
	IO0PIN = ( (IO0PIN & 0xFFFF00FF) | (command<<8) );
	IO0SET = 0x00000040; /* EN = 1 */
	IO0CLR = 0x00000030; /* RS = 0, RW = 0 */
	delay_ms(2);
	IO0CLR = 0x00000040; /* EN = 0, RS and RW unchanged(i.e. RS = RW = 0) */
	delay_ms(5);
}

void LCD_INIT(void)
{
	IO0DIR = 0x0000FFF0; /* P0.8 to P0.15 LCD Data. P0.4,5,6 as RS RW and EN */
	delay_ms(20);
	LCD_CMD(0x38);  /* Initialize lcd */
	LCD_CMD(0x0C);   /* Display on cursor off */
	LCD_CMD(0x06);  /* Auto increment cursor */
	LCD_CMD(0x01);   /* Display clear */
	LCD_CMD(0x80);  /* First line first position */
}

void LCD_STRING (char* msg)
{
	uint8_t i=0;
	while(msg[i]!=0)
	{
		IO0PIN = ( (IO0PIN & 0xFFFF00FF) | (msg[i]<<8) );
		IO0SET = 0x00000050; /* RS = 1, , EN = 1 */
		IO0CLR = 0x00000020; /* RW = 0 */
		delay_ms(2);
		IO0CLR = 0x00000040; /* EN = 0, RS and RW unchanged(i.e. RS = 1, RW = 0) */
		delay_ms(5);
		i++;
	}
}

void LCD_CHAR (char msg)
{
		IO0PIN = ( (IO0PIN & 0xFFFF00FF) | (msg<<8) );
		IO0SET = 0x00000050; /* RS = 1, , EN = 1 */
		IO0CLR = 0x00000020; /* RW = 0 */
		delay_ms(2);
		IO0CLR = 0x00000040; /* EN = 0, RS and RW unchanged(i.e. RS = 1, RW = 0) */
		delay_ms(5);
}

int main(void)
{
	char val_j[3];
	uint8_t j;
	j = 0;
	LCD_INIT();
	if((IR!=0)){
	LCD_CMD(0x01);
	LCD_STRING("NO");//first line
	LCD_CMD(0xC0);
	LCD_STRING("SIGNAL");//second line	
	}
	if((IR==0)){
	LCD_CMD(0x01);
	LCD_STRING("SIGNAL");//first line
	LCD_CMD(0xC0);
	LCD_STRING("RECEIVED");//second line
	}
	return 0;
}