#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <windows.h>
    
////////////////////////
// Open COMXX

    HANDLE hSerial;
    
    hSerial = CreateFile("COMXX",
            GENERIC_READ | GENERIC_WRITE,
            0,
            0,
            OPEN_EXISTING,
            FILE_ATTRIBUTE_NORMAL,
            0);
            
    if(hSerial==INVALID_HANDLE_VALUE)
    {
       if(GetLastError()==ERROR_FILE_NOT_FOUND)
          printf("File Not Found.\n");
       else
          printf("Generic Error.\n");
       exit(-1);
    }
    
    DCB dcbSerialParams = {0};
    dcbSerialParams.DCBlength=sizeof(dcbSerialParams);
    
    if(!GetCommState(hSerial, &dcbSerialParams))
    {
      printf("Error Getting State.\n");
      CloseHandle(hSerial);
      exit(-1);
    }
    
    dcbSerialParams.BaudRate = CBR_9600;
    dcbSerialParams.ByteSize = 8;
    dcbSerialParams.StopBits = ONESTOPBIT;
    dcbSerialParams.Parity = NOPARITY;
    
    if(!SetCommState(hSerial, &dcbSerialParams))
    {
      printf("Error setting State.\n");
      CloseHandle(hSerial);
      exit(-1);
    }
    
    COMMTIMEOUTS timeouts = {0};
    timeouts.ReadIntervalTimeout = 50;
    timeouts.ReadTotalTimeoutConstant = 50;
    timeouts.ReadTotalTimeoutMultiplier = 10;
    timeouts.WriteTotalTimeoutConstant = 50;
    timeouts.WriteTotalTimeoutMultiplier = 10;
    
    if(!SetCommTimeouts(hSerial, &timeouts))
    {
      printf("Error setting timeouts.\n");
      CloseHandle(hSerial);
      exit(-1);
    }

// END Open COMXX
////////////////////////