Page 215 - PDA Robotics Using Your Personal Digital Assistant to Control Your Robot

PDA 09 5/27/03 8:50 AM Page 191
}
return TRUE; Chapter 9 / PDA Robot Software for Pocket PC 2002
}
//
// StartApplication sets the connection parameters and
// calls ConnectSocket. If the connection fails ensure
// that the Control Center (which acts as the Server )
// is running.
//
BOOL CPDABotDlg::StartApplication()
{
m_strHandle="7";
m_hostname.GetWindowText(m_strServer);
m_nChannel=7;

if (ConnectSocket(m_strHandle, m_strServer, m_nChannel))
return TRUE;
else
{
this->m_status_window.SetWindowText( (LPCTSTR) CString("Connection Failed ") );
return FALSE;
}
}
//
// ReadPDAData() Is called when the CESocket signals that
// data has arrived from the Command Center. The data is
// a string indicating that the connection was successful
// or a Motion command that will be relayed to PDA Robots
// body.
//
void CPDABotDlg::ReadPDAData()
{

CString status_message;
char szMessage[512];
static int initialized;
u_long numbytes;
int ret;
//
// Ensure that we won't be blocked waiting here on the call
// to read the data.
//

ret = ioctlsocket ((SOCKET) m_pSocket, FIONREAD, &numbytes);
if( (ret == 0) && (numbytes > 0) )

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