LedBlinkExample3.c

#include <lpc17xx.h>   
#include "delay.h"     //User defined library which conatins the delay routines
#include "gpio.h"

#define LED P2_0     // Led is connected to P2.0

/* start the main program */
int main() 
{
    SystemInit();                        //Clock and PLL configuration 
    GPIO_PinFunction(LED,PINSEL_FUNC_0); // Configure Pin for Gpio
    GPIO_PinDirection(LED,OUTPUT);       // Configure the pin as OUTPUT

    while(1)
    {
        /* Turn On all the leds and wait for 100ms */ 
        GPIO_PinWrite(LED,HIGH);     // Make all the Port pin as high  
        DELAY_ms(100);

        GPIO_PinWrite(LED,LOW);     // Make all the Port pin as low  
        DELAY_ms(100);
    }
}