Page 230 - PDA Robotics Using Your Personal Digital Assistant to Control Your Robot

PDA 10 5/27/03 8:51 AM Page 206
PDA Robotics
}else{
status_msg += diagnostic_msg;
status_msg = szErr;
}
//AfxMessageBox(IDS_EXCEPTION, MB_OK);
pEx->Delete();
m_pFtpConnection = NULL;
return(FALSE);
}
return(TRUE);
}

The Wireless Data Link

On startup, the command center listens on a socket for a connection
request from the PDA controlling PDA Robot. The listening socket is
derived from the CCeSocket, as is the socket created on the PDA.

#include "stdafx.h"

CListeningSocket::CListeningSocket(CBeamDlg* pDoc)
void CListeningSocket::OnAccept(int nErrorCode)
{
CSocket::OnAccept(nErrorCode);
m_pDlg->ProcessPendingAccept();
}

CListeningSocket::~CListeningSocket()
{
}
IMPLEMENT_DYNAMIC(CListeningSocket, CSocket)
The Main Dialog window of the command center contains the
ClisteningSocket as a member variable. When we receive the request
and it is authenticated, we send the string “SUCCESS” back to the
PDA. Because the socket is established, we can send commands such
as “FORWARD” to the PDA, which sends the corresponding com-
mands to PDA Robot via the infrared Link.

CBeamDlg::CBeamDlg(CWnd* pParent /*=NULL*/)
: CDialog(CBeamDlg::IDD, pParent)
{
//{{AFX_DATA_INIT(CBeamDlg)
// NOTE: the ClassWizard will add member initialization here

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