#include <os.h>
#include <common.h>
#include "graphics.h"
#include "utils.h"
#include "main.h"

int main(void) {
	enableLink();
	clearScreen();
	unsigned char number = 0;
	while (!isKeyPressed(KEY_NSPIRE_ESC) && !isKeyPressed(KEY_84_CLEAR))
	{
		if (number < 128)
		{
			setTip();
			setRing();
		}
		else
		{
			resetTip();
			resetRing();
		}
		number++;
	}
	disableLink();
	return 0;
}

void enableLink()
{
	MISC_PORTS |= 0x20;
}

void disableLink()
{
	MISC_PORTS &= 0x20;
}

void InterruptHandler()
{

}

void setTip()
{
	KEYPAD_84_IO |= 1;
}

void resetTip()
{
	KEYPAD_84_IO &= ~1;
}

void setRing()
{
	KEYPAD_84_IO |= 2;
}

void resetRing()
{
	KEYPAD_84_IO &= ~2;
}