I am trying to develop with the PCI-DIO-24 (PCI-6503) in VC6 / Ni-DAQ version 7.4.
I simply want a function to be called when a digital input goes high or low. But the callback function always be no response.
Have anybody can help me to find what's wrong? How can I use CallBack ??
#include <afx.h>
#include <afxwin.h> // MFC core and standard components
#include "nidaqex.h"
#include <iostream>
using namespace std;
void __stdcall OnDataCallback(HWND handle, UINT msg, WPARAM wParam, LPARAM lParam) ;
void main(void)
{
int nRetCode = 0;// initialize MFC and print and error on failure
if (!AfxWinInit(::GetModuleHandle(NULL), NULL, ::GetCommandLine(), 0))
{
cerr << _T("Fatal Error: MFC initialization failed") << endl;
return;
}
i16 iStatus = 0, iRetVal = 0, iDBmodeON = 1, iDBmodeOFF = 0, iDevCode = 0;
i16 iSampTB = 0; u16 uSampInt = 0;
i16 iHalfReady = 0; i16 iDAQstopped = 0; u32 ulPtsTfr = 0; i16 iIgnoreWarning = 0;
i16 iGain = 1; i16 iUnits = 0;
u32 ulCount = 1000; f64 dSampRate = 2.0;
static i16 piHalfBuffer[50000] = {0};
i32 lTimeout = 180;
i16 iDevice = 1;
iStatus = Init_DA_Brds(iDevice, &iDevCode);
iRetVal = NIDAQErrorHandler(iStatus, "Init_DA_Brds", iIgnoreWarning);
i16 iChan = 0;
int iMode = 1;
int iDirection = 0;
iStatus=DIG_Prt_Config(iDevice,iChan,iMode, iDirection);
iRetVal = NIDAQErrorHandler(iStatus, "DIG_Prt_Config", iIgnoreWarning);
CString strChan;
strChan.Format("DI%-d",iChan);
const int nMaxStrChan = 128;
i8 FAR chanStr[nMaxStrChan]; memset(chanStr, 0, nMaxStrChan);
strcpy(chanStr, (LPCSTR)strChan);
i16 nDAQEvent = 8, nAddMode = 1;
i32 nTrigVal0 = 1, nTrigVal1=0,nIgnor = 0;
iStatus = Config_DAQ_Event_Message( iDevice,nAddMode, chanStr,nDAQEvent, nTrigVal0, nTrigVal1, nIgnor, nIgnor, nIgnor, NULL, NULL, (unsigned long)(&OnDataCallback));
//Config_DAQ_Event_Message( 1,1, "DI0",8,1, 0, 0, 0, 0, NULL, NULL, (unsigned long)(&OnDataCallback));
iRetVal = NIDAQErrorHandler(iStatus, "Config_DAQ_Event_Message", iIgnoreWarning);
i16 iGroup = 0;
i16 iGroupsize = 1;
static i16 portList[1] = {0};
iStatus = DIG_SCAN_Setup(iDevice, iGroup, iGroupsize, portList, iDirection);
iRetVal = NIDAQErrorHandler(iStatus, "DIG_SCAN_Setup", iIgnoreWarning);
static i16 piBuffer[100] = {0};//accept 100 items only
iStatus = DIG_Block_In(iDevice, iGroup, piBuffer, 1000);
iRetVal = NIDAQErrorHandler(iStatus, "DIG_Block_In", iIgnoreWarning);
printf(" Continuous acquisition has started.\n");
printf(" HINT: You can add your own graphing calls in the while loop.\n");
while (iLoopCount <10) //wait callback function
{
if (iLoopCount)
{
printf(" get call back %d!\n",iLoopCount);
break;
iLoopCount++;
}
::Sleep(5);
}
printf(" Continuous acquisition is done!\n");
/* CLEANUP - Don't check for errors on purpose. */
iStatus = DAQ_Clear(iDevice);
iStatus = DAQ_DB_Config(iDevice, iDBmodeOFF);
iStatus = Timeout_Config(iDevice, -1);
}
void __stdcall OnDataCallback(HWND handle, UINT msg, WPARAM wParam, LPARAM lParam)
{
i32 iPattern=0;
DIG_In_Prt(1,0,&iPattern);
iLoopCount++;
return;
}
