/* This program uses wiringPi to read from a pushbutton switch 	on a PiFace
and then uses that input to control the output of an onboard LED */
	
#include <iostream>
#include <wiringPi.h>
#include <piFace.h>
	
#define PIFACE 200
#define LED (PIFACE+2) //This is LED 2
#define BUTTON (PIFACE+0) //This is S1
		
using namespace std;
	
int main()
	{
	
		//The state of the switch
		bool val;
	
		cout << "Using PiFace" << endl;
	
		//For terminal output interface
		cout << "Switch: ";
	
		//These methods must be called before working with 				// PiFace/wiringPi
		wiringPiSetupSys();
		piFaceSetup(PIFACE);
	
		//Infinite loop
		for(;;)
		{
			//Enable S1
			pullUpDnControl(BUTTON,PUD_UP);
	
			//Read the state of S1 (1 is up, 0 is down)
			val = digitalRead(BUTTON);
	
			//Show this state on LED2
			digitalWrite(LED,val);
	
			//Show this state in a debugging terminal
			cout << val;
	
			//Do this to keep the output down to one line
			cout << "\b";
		}
	
		return 0;
	}