#include <stdio.h>
#include <xgpio.h>
#include "xparameters.h"
#define LED_DELAY     100000

int main()
{
   XGpio  output_one;
   XGpio  output_two;
   int led_data = 0;
   volatile int Delay;

   XGpio_Initialize(&output_one, XPAR_AXI_GPIO_0_DEVICE_ID);	//initialize output XGpio variable
   XGpio_Initialize(&output_two, XPAR_AXI_GPIO_0_DEVICE_ID);
   XGpio_SetDataDirection(&output_one, 1, 0x0);		//set first channel tristate buffer to output
   XGpio_SetDataDirection(&output_two, 2, 0x0);		//set first channel tristate buffer to output


   while(1){
      led_data = XGpio_DiscreteRead(&output_one, 1);	//get led data

      XGpio_DiscreteWrite(&output_one, 1, led_data);	//write switch data to the LEDs
      XGpio_DiscreteWrite(&output_two, 2, led_data);	//write switch data to the LEDs


      for (Delay = 0; Delay < LED_DELAY; Delay++); // Wait a small amount of time so the LED is visible


      XGpio_DiscreteWrite(&output_one, 1, ~led_data);	//write switch data to the LEDs
      XGpio_DiscreteWrite(&output_two, 2, ~led_data);	//write switch data to the LEDs

      for (Delay = 0; Delay < LED_DELAY; Delay++); // Wait a small amount of time so the LED is visible

      XGpio_DiscreteWrite(&output_one, 1, led_data);	//write switch data to the LEDs
      XGpio_DiscreteWrite(&output_two, 2, led_data);	//write switch data to the LEDs

      for (Delay = 0; Delay < LED_DELAY; Delay++); // Wait a small amount of time so the LED is visible


      XGpio_DiscreteWrite(&output_one, 1,  ~led_data);	//write switch data to the LEDs
      XGpio_DiscreteWrite(&output_two, 2,  ~led_data);	//write switch data to the LEDs

      for (Delay = 0; Delay < LED_DELAY; Delay++); // Wait a small amount of time so the LED is visible


   }

   return 0;
}