Knowledge Base Nr: 00204 XPort.cpp - http://www.swe-kaiser.de

MFC: Sockets; Lantronix XPort Lesen und Schreiben GPIO Interface

  
//www.lantronix.com
//ACHTUNG: nach CAsyncSocket::Create()/Connect() muss die messageloop ausgeführt werden!

CAsyncSocket* g_pClient = 0;

BOOL CXporttestDlg::OnInitDialog()
{
...
    GetDlgItem(IDC_STATUS)->SetWindowText("Init...");

    GetDlgItem(IDC_IP)->SetWindowText("192.168.32.123");
    g_pClient = new CAsyncSocket();

    if (g_pClient->Create() == 0)
    {
        GetDlgItem(IDC_STATUS)->SetWindowText("Error creating client socket.");
        return TRUE;
    }

    CString strIP;
    GetDlgItem(IDC_IP)->GetWindowText(strIP);

    const int PORT= 0x77F0;

    if (!g_pClient->Connect(strIP, PORT))
    {
        int nErr = g_pClient->GetLastError();
        if(nErr != WSAEWOULDBLOCK)
        {
            g_pClient->Close();

            GetDlgItem(IDC_STATUS)->SetWindowText("Error connecting to server.");
            return TRUE;
        }
    }

    GetDlgItem(IDC_STATUS)->SetWindowText("Init OK!");
...
}

void CXporttestDlg::OnGet()
{
    GetDlgItem(IDC_STATUS)->SetWindowText("Send...");

    unsigned char buffer[] = { 0x13, 0,0,0,0, 0,0,0,0 };

    int nSend = g_pClient->Send(buffer, sizeof(buffer));
    if (nSend == SOCKET_ERROR)
    {
        GetDlgItem(IDC_STATUS)->SetWindowText("Error sending to server.");
        return;
    }

    Sleep(50);

    unsigned char buffer2[20] = {0};
    int nRecv = g_pClient->Receive(buffer2, sizeof(buffer2));
    if (nRecv != 5)
    {
        GetDlgItem(IDC_STATUS)->SetWindowText("Error reading from server.");
        return;
    }

    CheckDlgButton(IDC_GPIO0, (buffer2[1]&0x01) ? 1 : 0);
    CheckDlgButton(IDC_GPIO1, (buffer2[1]&0x02) ? 1 : 0);
    CheckDlgButton(IDC_GPIO2, (buffer2[1]&0x04) ? 1 : 0);

    GetDlgItem(IDC_STATUS)->SetWindowText("OK!");
}

void CXporttestDlg::OnSet()
{
    GetDlgItem(IDC_STATUS)->SetWindowText("Send...");

    unsigned char nValue = 0;
    if (IsDlgButtonChecked(IDC_GPIO0))
        nValue |= 0x01;
    if (IsDlgButtonChecked(IDC_GPIO1))
        nValue |= 0x02;
    if (IsDlgButtonChecked(IDC_GPIO2))
        nValue |= 0x04;

    unsigned char buffer[] = { 0x1b, 0xcc, 0,0,0, 0xcc,0,0,0 };
    buffer[1] = 0x07;
    buffer[5] = nValue;

    int nSend = g_pClient->Send(buffer, sizeof(buffer));
    if (nSend == SOCKET_ERROR)
    {
        GetDlgItem(IDC_STATUS)->SetWindowText("Error sending to server.");
        return;
    }

    Sleep(50);

    unsigned char buffer2[20] = {0};
    int nRecv = g_pClient->Receive(buffer2, sizeof(buffer2));
    if (nRecv != 5)
    {
        GetDlgItem(IDC_STATUS)->SetWindowText("Error reading from server.");
        return;
    }

    GetDlgItem(IDC_STATUS)->SetWindowText("OK!");
}

void CXporttestDlg::OnClose()
{
    g_pClient->Close();

    delete g_pClient;
    g_pClient = 0;

    CDialog::OnClose();
}