#include "oulib.h"
// Bion board example
// Turn on LED when button is pressed

// One change from our discussion in class:
//  When the button is pressed, the pin reads a 0
//
// Circuit information:
//  Button connected to PORT D, pin 3
//    -- When open, the pin is at +5 V
//    -- When closed, the pin is at 0 V
// 
//  LED connected to PORT C, pin 5
//



int main (void)
{

	DDRC = 0xFF;
	DDRD = 0x0;
	
	while(1) {
	  if(!(PIND & 0x8))   // Does PIN 3 of PORT D read low right now?
	    {
	      // The button is pressed
	      PORTC = PORTC | 0x20;
	      // PORTC |= 0x20;  // Equivalent to above line
	    }
	  else
	    {
	      // Button is not pressed
	      PORTC &= ~0x20;
	      //PORTC &= 0xDF;   // Equivalent to above line
	      
	    }

	};
	return (0);
}