/*  Name     : main.c
 *  Purpose  : Source code for LED Interfacing with ARM LPC1248.
 *  Author   : Gemicates
 *  Date     : 2018-08-01
 *  Website  : www.gemicates.org
 *  Revision : None
 */
#include<lpc21xx.h> 			//header file for LPC21XX series

void delay(int time) 			//delay function declaration
{
int i,j; 				//This function produces a delay in msec
for(i=0;i<time;i++)
{
for(j=0;j<i;j++);
}
}

int main() 				//main function
{
PINSEL0=0X00000000; 			//select PORT0 as GPIO mode
IO0DIR=0XFFFFFFFF; 			//make PORT0 pin as Output mode 
while(1) 				//Repeat(loop) forever
{
IO0SET=0X55555555; 			//Set the PORT0 pins 
delay(900); 				//hault for sometime
IO0CLR=0X55555555; 			//clear the PORT0 pins
IO0SET=0XAAAAAAAA; 			//Set the PORT0 pins 
delay(900); 				//hault for sometime
IO0CLR=0XAAAAAAAA; 	`		//clear the PORT0 pins         
}
return 0; 				//return back to main function
}