SerialPort_com_port_cpp

#include <cstring>
#include <iostream>
#include "windows.h"
#include "SerialPort.h"

using namespace std;

HANDLE initSerial(short int port, DWORD baudrate, BYTE byteSize, BYTE stopbit, BYTE parrity){
    HANDLE uartPort;
    char portName[14];
    char portNumber[4];
    strcpy(portName, "\\\\.\\COM");
    itoa(port, portNumber, 10);
    strcat(portName, portNumber);
    uartPort = CreateFileA(portName, GENERIC_READ | GENERIC_WRITE, NULL,0, OPEN_EXISTING, 0, NULL);
    if (uartPort == INVALID_HANDLE_VALUE) {
        if (GetLastError() == ERROR_FILE_NOT_FOUND) {
            cout << "serial port COM"<< uartPort << " does not exist\n";
        }
        cout << "come other error occured.\n";
        exit(1);
    }
    DCB dcbSerialParams = { 0 };
    dcbSerialParams.DCBlength = sizeof(dcbSerialParams);
    if (!GetCommState(uartPort, &dcbSerialParams))
    {
        cout << "getting state error\n";
        exit(1);
    }
    dcbSerialParams.BaudRate = baudrate;
    dcbSerialParams.ByteSize = byteSize;
    dcbSerialParams.StopBits = stopbit;
    dcbSerialParams.Parity = parrity;
    if (!SetCommState(uartPort, &dcbSerialParams))
    {
        cout << "error setting serial port state\n";
        exit(1);
    }
    COMMTIMEOUTS CommTimeOuts = { 0 };
    if(GetCommTimeouts(uartPort, &CommTimeOuts)){
        cout << "CommTimeOuts.ReadIntervalTimeout" << CommTimeOuts.ReadIntervalTimeout << endl;
        cout << "CommTimeOuts.ReadTotalTimeoutConstant"<< CommTimeOuts.ReadTotalTimeoutConstant << endl;
        cout << "CommTimeOuts.ReadTotalTimeoutMultiplier" << CommTimeOuts.ReadTotalTimeoutMultiplier << endl;
        cout << "CommTimeOuts.WriteTotalTimeoutConstant" << CommTimeOuts.WriteTotalTimeoutConstant << endl;
        cout << "CommTimeOuts.WriteTotalTimeoutMultiplier" << CommTimeOuts.WriteTotalTimeoutMultiplier << endl;
    }else{
        cout << "error get set COMMTIMEOUTS" << endl;
    }
    SetCommTimeouts(uartPort, &CommTimeOuts);

    return uartPort;
}

DWORD sendData(HANDLE uPort, PCVOID data, unsigned int size){
    DWORD  bytesWriten;
    WriteFile(uPort, data, sizeof(data), &bytesWriten, NULL);
    return bytesWriten;
}

DWORD getData(HANDLE uPort, PVOID data, unsigned int size){
    DWORD bytesReading = 1;
    int i;
    for(i = 0; bytesReading && i < size-1; i++){
        cout << ReadFile(uPort, ((PVOID)(((byte*)data)+i)), 1, &bytesReading, 0) << endl;
        cout << i << endl;
    }
    cout << "finish" << endl;
    *(((byte*)data)+i) = '\0';
    return i;
}

void closeSerial(HANDLE uPort){
    CloseHandle(uPort);
}