/**
 * EE3173 Lab 3
 * Mark Furland
 * 2015-02-06
 **/
#include <alt_types.h>

void main(){
	alt_32 count = 0;

	alt_32 switchHist = 0;
	alt_32 buttonHist = 0;

	alt_32 delay = 0;

	volatile alt_32* display = 0x11050;
	volatile alt_32* switches = 0x11030;
	volatile alt_32* buttons = 0x11040;

	display[1] = 0xFFFFFFFF;//Set display direction to output

	for(;;){
		//If a switch goes high, it will be marked here.
		switchHist |= switches[0];
		if(switchHist != switches[0]){
			//A switch has gone low
			//This will miss multiple switches at the same time,
			//but I think this is acceptable?
			count++;
			switchHist = switches[0];
		}

		buttonHist |= buttons[0];
		if(buttonHist != buttons[0]){
			//A button is pressed
			count++;
			buttonHist = buttons[0];
		}

		//Set display to show count
		display[0] = count;

		for(delay=0;delay<1001;delay++) ;
	}

}