Hello, all.
I am trying to get an Opal Kelly XEM3005 board up and running with LabWindows/CVI 8.5.
I have been in touch with OK's Tech Suppt, and have run down the initial issues of "bool" types. After having (at OK's recommendation) with "char" types, I can now include the headers without errors.
There is, however, a new problem:
When I call the constructor function, which should return a pointer to an "okFrontPanel_HANDLE" type, I am getting an error for a missing prototype for the constructor(s).
Dredging through the .c(pp) file, I found the following:
//----------------------------
--------------------------------------------
// Function calls - okCFrontPanel
//------------------------------------------------------------------------
okDLLEXPORT okFrontPanel_HANDLE DLL_ENTRY
okFrontPanel_Construct()
{
if (_okFrontPanel_Construct)
return((*_okFrontPanel_Construct)());
return(NULL);
}
However, trying to call it just gives me a "missing prototype" error.
Of course, doing some more dredging turned this up in the ".h" file:
//
// okFrontPanel
//
okDLLEXPORT okFrontPanel_HANDLE DLL_ENTRY okFrontPanel_Construct();
okDLLEXPORT void DLL_ENTRY okFrontPanel_Destruct(okFrontPanel_HANDLE hnd);
So I'm not sure I understand what's going on... What is the horribly simple (and obvious) thing I am missing?
Relevent code snippets included below:
~~~~~~~~~~~~~~~~~~~~~~~~
try1.c:
#include <cvirte.h>
#include <userint.h>
#include "Try1.h"
#include "XEM.h"
#include <windows.h>
//#define _WIN32
static int panelHandle;
static okFrontPanel_HANDLE XEM_Device;
int __stdcall WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
LPSTR lpszCmdLine, int nCmdShow)
{
if (InitCVIRTE (hInstance, 0, 0) == 0)
return -1; /* out of memory */
if ((panelHandle = LoadPanel (0, "Try1.uir", PANEL)) < 0)
return -1;
DisplayPanel (panelHandle);
RunUserInterface ();
DiscardPanel (panelHandle);
return 0;
}
int CVICALLBACK Connect (int panel, int control, int event,
void *callbackData, int eventData1, int eventData2)
{
int Value = 0;
switch (event)
{
case EVENT_COMMIT:
GetCtrlVal(PANEL, PANEL_CONNECT_SWITCH, &Value);
SetCtrlVal(PANEL, PANEL_CONNECT_LED, Value);
if( Value )
XEM_Connect(XEM_Device);
else
XEM_Disconnect(XEM_Device);
break;
}
return 0;
}
int CVICALLBACK Quit (int panel, int control, int event,
void *callbackData, int eventData1, int eventData2)
{
switch (event)
{
case EVENT_COMMIT:
QuitUserInterface (0);
break;
}
return 0;
}
~~~~~~~~~~~~~~~~~~
XEM.c:
int XEM_Connect ( okFrontPanel_HANDLE XEM_Device )
{
int NoDevices = 0; // Number of devices attached to the PC
// Load the DLL (?)
// Load the FrontPanel DLL
if (FALSE == okFrontPanelDLL_LoadLib(NULL))
{
printf("Could not load FrontPanel DLL\n");
exit(-1);
}
// Find out how many devices are attached
// XEM_Device = okFrontPanel_Construct();
XEM_Device = okCFrontPanel();
// NoDevices = okCFrontPanel();
printf("%d OK devices attached\n", NoDevices);
// Call the contructor?
// okCFrontPanel ();
return XEM_SUCCESS;
}
int XEM_Disconnect ( okFrontPanel_HANDLE XEM_Device )
{
// Call the Destructor (?)
// ~okCFrontPanel ();
return XEM_SUCCESS;
}
