#include <fstream>
#include <string>
#include <iostream>
#include <sstream>

#include <Windows.h>

using namespace std;

int main(void)
{
	COMMTIMEOUTS timeouts = { 0 };
	HANDLE h = CreateFile("COM1", GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
	if (h == INVALID_HANDLE_VALUE)
	{
		cout << "Erreur: Impossible d´ouvrir le port série" << endl;
		return 1;
	}
 	DCB dcb = { 0 };
	BOOL dcbOk = GetCommState(h, &dcb);
	dcb.BaudRate = CBR_115200;
	dcb.ByteSize = 8;
	dcb.Parity = NOPARITY;
 	dcb.StopBits = TWOSTOPBITS;
	dcbOk = SetCommState(h, &dcb);
	timeouts.ReadIntervalTimeout = 100;
	timeouts.ReadTotalTimeoutMultiplier = 100;
	timeouts.ReadTotalTimeoutConstant = 100;
	timeouts.WriteTotalTimeoutMultiplier = 100;
	timeouts.WriteTotalTimeoutConstant = 100;
	if (!SetCommTimeouts(h, &timeouts))
		return 1;
	// Test de l'écho
	for (int i = 0; i < 5; ++i)
	{
		char sentChar = '0' + i;
		char receivedChar = '#';
		DWORD bytesWritten;
		DWORD bytesRead;
		if (!WriteFile(h, &sentChar, 1, &bytesWritten, 0))
			return 1;
		if (!ReadFile(h, &receivedChar, 1, &bytesRead, 0) || bytesRead != 1)
			cout << sentChar << " : pas de reponse ?" << endl;
		else
			cout << sentChar << " = " << receivedChar << endl;
	}
	CloseHandle(h);
	return 0;
}