#include "stdafx.h"
#include "windows.h"
#include <iostream>
using namespace std;

HANDLE port;

void init() {
	port = CreateFile("COM2",GENERIC_READ|GENERIC_WRITE,0,NULL,OPEN_EXISTING,0,NULL);
	SetupComm(port, 128, 128); 

	DCB dcb;
	GetCommState(port, &dcb);
	dcb.BaudRate = 2400;
	dcb.ByteSize = 8;
	dcb.Parity = NOPARITY;
	dcb.StopBits = TWOSTOPBITS;
	dcb.fAbortOnError = TRUE;
	SetCommState(port, &dcb);
}

void close(HANDLE h) {
	CloseHandle(h);
}

unsigned char read() {
	unsigned char data[2];
	DWORD junk;
	BOOL returnval = ReadFile(port, &data, 1, &junk, NULL);
	return data[0];
}

void write(unsigned char c) {
	unsigned char data[2];
	DWORD junk;
	data[0] = c;
	WriteFile(port,&data,1,&junk,NULL);
}

int _tmain(int argc, _TCHAR* argv[])
{
	int command;

	init();
	cin >> command;
	if (command == 0) {
		cout << "Turning off LED0" << endl;
		write(0);
	} else if (command == 1) {
		cout << "Turning on LED0" << endl;
		write(1);
	} else if (command == 2) {
		cout << "Turning off LED1" << endl;
		write(2);
	} else if (command == 3) {
		cout << "Turning on LED1" << endl;
		write(3);
	} else if (command == 4) {
		cout << "Turning off LED2" << endl;
		write(4);
	} else if (command == 5) {
		cout << "Turning on LED2" << endl;
		write(5);
	} else if (command == 6) {
		cout << "Turning off LED3" << endl;
		write(6);
	} else if (command == 7) {
		cout << "Turning on LED3" << endl;
		write(7);
	} else if (command == 8) {
		cout << "Checking the status of SW0" << endl;
		write(8);
		unsigned long data = read();
		if (data == 0) {
			cout << "SW0 is on" << endl;
		} else {
			cout << "SW0 is off" << endl;
		}
	} else if (command == 9) {
		cout << "Checking the status of SW0" << endl;
		write(9);
		unsigned long data = read();
		if (data == 0) {
			cout << "SW1 is on" << endl;
		} else {
			cout << "SW1 is off" << endl;
		}
	} else if (command == 10) {
		cout << "Checking the status of SW0" << endl;
		write(10);
		unsigned long data = read();
		if (data == 0) {
			cout << "SW2 is on" << endl;
		} else {
			cout << "SW2 is off" << endl;
		}
	} else if (command == 11) {
		cout << "Checking the status of SW0" << endl;
		write(11);
		unsigned long data = read();
		if (data == 0) {
			cout << "SW3 is on" << endl;
		} else {
			cout << "SW3 is off" << endl;
		}
	} else {
		cout << "Unknown command." << endl;
	}

	return 0;
}