dualdma.c

16 relay output channels and 16 isolated digital input channels LED indicators to show activated

            ptDevFeatures.size = sizeof(DEVFEATURES);
            if ((ErrCde = DRV_DeviceGetFeatures(DriverHandle,
                (LPT_DeviceGetFeatures)&ptDevFeatures)) != SUCCESS)
            {
                DRV_GetErrorMessage(ErrCde,(LPSTR)szErrMsg);
                MessageBox(hWnd,(LPCSTR)szErrMsg,"Driver Message",MB_OK);
                DRV_DeviceClose((LONG far *)&DriverHandle);
                return 0;
            }

            // Step 3: Allocate DMA buffer for DMA transfer
            ptAllocateDMABuffer.CyclicMode = gwCyclicMode;
            ptAllocateDMABuffer.RequestBufSize = gulConvNum * 2;
            ptAllocateDMABuffer.ActualBufSize = &gwActualBufSize;
            ptAllocateDMABuffer.buffer = &pBuffer;
            if ((ErrCde = DRV_AllocateDMABuffer(DriverHandle,
                (LPT_AllocateDMABuffer)&ptAllocateDMABuffer)) != SUCCESS)
            {
                DRV_GetErrorMessage(ErrCde,(LPSTR)szErrMsg);
                MessageBox(hWnd,(LPCSTR)szErrMsg,"Driver Message",MB_OK);
                DRV_DeviceClose((LONG far *)&DriverHandle);
                return 0;
            }

            // Step 4: Allocate buffer A memory for Voltage data or Raw data
            if((hUserBufA=(FLOAT far *)GlobalAlloc(GHND,
                sizeof(FLOAT) * gulConvNum)) == 0)
            {
                MessageBox(hWnd,"Not enough memory for buffer ",
                    "High Speed",MB_OK);
                DRV_FreeDMABuffer(DriverHandle, (LPARAM)&pBuffer);
                DRV_DeviceClose((LONG far *)&DriverHandle);
                return 0;
            }

            // Step 5: Allocate buffer B memory for Voltage data or Raw data
            if((hUserBufB=(FLOAT far *)GlobalAlloc(GHND,
                sizeof(FLOAT) * gulConvNum)) == 0)
            {
                MessageBox(hWnd,"Not enough memory for buffer ",
                    "High Speed",MB_OK);
                DRV_FreeDMABuffer(DriverHandle, (LPARAM)&pBuffer);
                DRV_DeviceClose((LONG far *)&DriverHandle);
                return 0;
            }

            hUserA = (USHORT far *)GlobalLock(hUserBufA);
            hUserB = (USHORT far *)GlobalLock(hUserBufB);

            // Step 6: Enable event feature
            ptEnableEvent.EventType = ADS_EVT_INTERRUPT  |
                ADS_EVT_BUFCHANGE  |
                ADS_EVT_TERMINATED |
                ADS_EVT_OVERRUN;
            ptEnableEvent.Enabled = gwEvtFlag;
            ptEnableEvent.Count   = 512;

            if ((ErrCde = DRV_EnableEvent(DriverHandle,
                (LPT_EnableEvent)&ptEnableEvent)) != 0)
            {
                DRV_GetErrorMessage(ErrCde,(LPSTR)szErrMsg);
                MessageBox(hWnd,(LPCSTR)szErrMsg,"Driver Message",MB_OK);
                GlobalUnlock(hUserBufA);
                GlobalFree(hUserBufA);
                GlobalUnlock(hUserBufB);
                GlobalFree(hUserBufB);
                DRV_FreeDMABuffer(DriverHandle, (LPARAM)&pBuffer);
                DRV_DeviceClose((LONG far *)&DriverHandle);
                return 0;
            }

            for (i=0 ; i < gwNumChl ; i++)
            {
                if (!gwGainList)
                {
                    gwGainCde[i] = DevFeatures.glGainList[gwGainCode].usGainCde;      // no gain list
                }
                else
                {
                    temp = gwGain[i];
                    gwGainCde[i] = DevFeatures.glGainList[temp].usGainCde;
                }
            }

            // Step 7: Start DMA transfer
            ptFAIDualDmaScanStart.TrigSrc    = gwExtTrig;
            ptFAIDualDmaScanStart.StartChan  = gwStartChl;
            ptFAIDualDmaScanStart.NumChans   = gwNumChl;
            ptFAIDualDmaScanStart.GainList   = &gwGainCde[0];
            ptFAIDualDmaScanStart.SampleRate = gdwPacerRate;
            ptFAIDualDmaScanStart.count  = gulConvNum;
            ptFAIDualDmaScanStart.BufferA = (USHORT far *)pBuffer;
            ptFAIDualDmaScanStart.BufferB = (USHORT far *)pBuffer;

            if ((ErrCde = DRV_FAIDualDmaScanStart(DriverHandle,
                (LPT_FAIDualDmaScanStart)&ptFAIDualDmaScanStart)) != 0)
            {
                DRV_GetErrorMessage(ErrCde,(LPSTR)szErrMsg);
                MessageBox(hWnd,(LPCSTR)szErrMsg,"Driver Message",MB_OK);
                GlobalUnlock(hUserBufA);
                GlobalFree(hUserBufA);
                GlobalUnlock(hUserBufB);
                GlobalFree(hUserBufB);
                DRV_FreeDMABuffer(DriverHandle, (LPARAM)&pBuffer);
                DRV_DeviceClose((LONG far *)&DriverHandle);
                return 0;
            }

            gwCyclicCount = 0;			

            if (gwEvtFlag)
                hThreadHandle = CreateThread(0, 0,
                (LPTHREAD_START_ROUTINE) UserThread,
                0, 0, (LPDWORD)&dwThreadID);

            Sleep(0);

            EnableMenuItem(hMenu, IDM_RUN, MF_DISABLED | MF_BYCOMMAND);

            // Enable stop and status buttons
            EnableWindow(hwndStopButton, TRUE);
            EnableWindow(hwndStatusButton, TRUE);

            return 0;
            //end IDM_RUN

        case IDC_STOPBUTTON:            

            // Disable stop and status buttons
            EnableWindow(hwndStopButton, FALSE);

            EnableWindow(hwndStatusButton, FALSE);

            // Step 1: Stop A/D conversion for high speed
            if ((ErrCde = DRV_FAITerminate(DriverHandle)) != 0)
            {
                DRV_GetErrorMessage(ErrCde,(LPSTR)szErrMsg);
                MessageBox(hWnd,(LPCSTR)szErrMsg,"Driver Message",MB_OK);
                GlobalUnlock(hUserBufA);
                GlobalFree(hUserBufA);
                GlobalUnlock(hUserBufB);
                GlobalFree(hUserBufB);
                DRV_FreeDMABuffer(DriverHandle, (LPARAM)&pBuffer);
                DRV_DeviceClose((LONG far *)&DriverHandle);    
				return 0;
            }			
			if ( gwEvtFlag == 0 )
			{				
				adTerminateEvent();
			}
            return 0;

        case IDC_STATUSBUTTON:

            // Get DMA transfer status
            ptFAICheck.ActiveBuf = &gwActiveBuf;
            ptFAICheck.stopped   = &gwStopped;
            ptFAICheck.retrieved = &gulRetrieved;
            ptFAICheck.overrun   = &gwOverrun;
            ptFAICheck.HalfReady = &gwHalfReady;

            if ((ErrCde = DRV_FAICheck(DriverHandle,
                (LPT_FAICheck)&ptFAICheck)) != 0)
            {
                DRV_GetErrorMessage(ErrCde,(LPSTR)szErrMsg);
                MessageBox(hWnd,(LPCSTR)szErrMsg,"Driver Message",MB_OK);
                GlobalUnlock(hUserBufA);
                GlobalFree(hUserBufA);
                GlobalUnlock(hUserBufB);
                GlobalFree(hUserBufB);
                DRV_FreeDMABuffer(DriverHandle, (LPARAM)&pBuffer);
                DRV_DeviceClose((LONG far *)&DriverHandle);
                return 0;
            }
            else
            {   // Display the status of the A/D conversion
                sprintf(szDest, "Cyclic Counts: %d\n", gwCyclicCount);
                if (gwActiveBuf)
                   strcpy(szTemp, "Active Buffer: B\n");
                else
                   strcpy(szTemp, "Active Buffer: A\n");

                strcat(szDest, szTemp);
                ratio = 100.0 * gulRetrieved / gulConvNum;
                szStr = fcvt((double)ratio, 0, &dec, &sign);
                strcat(szDest, "Finish:  ");
                strcat(szDest, szStr);
                strcat(szDest, "%...");
                MessageBox(hWnd,(LPCSTR)szDest, "Check Status", MB_OK);
            }

            return 0;
        }

    case WM_DESTROY:

        PostQuitMessage(0);
        break;

    default:
        return (DefWindowProc(hWnd, message, wParam, lParam));
    }

    return ((LONG)NULL);
}
//------------------------------------------------------------------
void UserThread()
{
    USHORT usEventType;
    LONG  ErrCde;
    DWORD TickValue;

    TickValue = GetTickCount();
    TickValue = TickValue + 500000;

    while(TickValue > GetTickCount())
    {
        // Check message
        ptCheckEvent.EventType = &usEventType;
        ptCheckEvent.Milliseconds = 5000;

        if ((ErrCde = DRV_CheckEvent(DriverHandle,
            (LPT_CheckEvent)&ptCheckEvent)) != 0)
        {
            MessageBox(hWnd,"Check Event Error !","Thread Message",MB_OK);
            return ;
        }

        // Process interrupt event
        if (usEventType & ADS_EVT_INTERRUPT)
            adInterruptEvent();

        // Process buffer change event
        if (usEventType & ADS_EVT_BUFCHANGE)
            adBufChangeEvent();

        // Process overrun event
        if (usEventType & ADS_EVT_OVERRUN)
            adOverrunEvent();

        // Process terminate event
        if (usEventType & ADS_EVT_TERMINATED)
        {
            adTerminateEvent();
            return ;
        }
    }

    MessageBox(hWnd,"Never Get Any Event !","Thread Message",MB_OK);
}

//------------------------------------------------------------------
void adInterruptEvent()
{
    return;
}

//------------------------------------------------------------------
void adBufChangeEvent()
{
    ptFAICheck.ActiveBuf = &gwActiveBuf;
    ptFAICheck.stopped   = &gwStopped;
    ptFAICheck.retrieved = &gulRetrieved;
    ptFAICheck.overrun   = &gwOverrun;
    ptFAICheck.HalfReady = &gwHalfReady;

    if ((ErrCde = DRV_FAICheck(DriverHandle,
         (LPT_FAICheck)&ptFAICheck)) != 0)
    {
        DRV_GetErrorMessage(ErrCde,(LPSTR)szErrMsg);
        MessageBox(hWnd,(LPCSTR)szErrMsg,"Thread Message",MB_OK);
        return ;
    }

    if (gwHalfReady == 1)  // buffer A ready
    {
        ptFAITransfer.ActiveBuf = 0;   // read buffer A
        ptFAITransfer.DataType = gwDataType;
        ptFAITransfer.start    = 0;
        ptFAITransfer.count    = gulConvNum/2;
        ptFAITransfer.overrun  = &gwOverrun;
        ptFAITransfer.DataBuffer = hUserA;

        if ((ErrCde = DRV_FAITransfer(DriverHandle,
            (LPT_FAITransfer)&ptFAITransfer)) != 0)
        {
            DRV_GetErrorMessage(ErrCde,(LPSTR)szErrMsg);
            MessageBox(hWnd,(LPCSTR)szErrMsg,"Thread Message",MB_OK);
            return ;
        }
    }
    else if (gwHalfReady == 2) // buffer B ready
    {
        ptFAITransfer.ActiveBuf = 1;   // buffer B
        ptFAITransfer.DataType = gwDataType;
        ptFAITransfer.start    = gulConvNum/2;
        ptFAITransfer.count    = gulConvNum/2;
        ptFAITransfer.overrun  = &gwOverrun;
        ptFAITransfer.DataBuffer = hUserB;

        if ((ErrCde = DRV_FAITransfer(DriverHandle,
            (LPT_FAITransfer)&ptFAITransfer)) != 0)
        {
            DRV_GetErrorMessage(ErrCde,(LPSTR)szErrMsg);
            MessageBox(hWnd,(LPCSTR)szErrMsg,"Thread Message",MB_OK);
            return ;
        }

    }

    gwCyclicCount ++;

    return;
}
//------------------------------------------------------------------
void adOverrunEvent()
{
    // clear overrun
    if ((ErrCde = DRV_ClearOverrun(DriverHandle)) != 0)
    {
        DRV_GetErrorMessage(ErrCde,(LPSTR)szErrMsg);
        MessageBox(hWnd,(LPCSTR)szErrMsg,"Thread Message",MB_OK);
        return ;
    }

    return;
}
//------------------------------------------------------------------
void adTerminateEvent()
{
    // Disable stop and status buttons
    EnableWindow(hwndStopButton, FALSE);
    EnableWindow(hwndStatusButton, FALSE);   

    // Get real voltage of buffer from driver
    ptFAITransfer.ActiveBuf = 0;   // read buffer A
    ptFAITransfer.DataType = gwDataType;
    ptFAITransfer.start    = 0;
    ptFAITransfer.count    = gulConvNum;
    ptFAITransfer.overrun  = &gwOverrun;
    ptFAITransfer.DataBuffer = (LPVOID)hUserA;

    if ((ErrCde = DRV_FAITransfer(DriverHandle,
        (LPT_FAITransfer)&ptFAITransfer)) != 0)
    {
        DRV_GetErrorMessage(ErrCde,(LPSTR)szErrMsg);
        MessageBox(hWnd,(LPCSTR)szErrMsg,"Thread Message",MB_OK);
        return ;
    }   

    // Display data
    DialogBox (hInstance, MAKEINTRESOURCE(IDD_DATA),
        hWnd, lpfnShowDataDlgProc) ;

    // Free buffer
    GlobalUnlock(hUserBufA);
    GlobalFree(hUserBufA);
    GlobalUnlock(hUserBufB);
    GlobalFree(hUserBufB);
    DRV_FreeDMABuffer(DriverHandle, (LPARAM)&pBuffer);

    // Close driver
    DRV_DeviceClose((LONG far *)&DriverHandle);

    EnableMenuItem(hMenu, IDM_RUN, MF_ENABLED | MF_BYCOMMAND);

    return;
}