addma.c

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

            ptFAIDmaStart.buffer = (USHORT far *)pBuffer;

            if ((ErrCde = DRV_FAIDmaStart(DriverHandle,
                (LPT_FAIDmaStart)&ptFAIDmaStart)) != 0)
            {
                DRV_GetErrorMessage(ErrCde,(LPSTR)szErrMsg);
                MessageBox(hWnd,(LPCSTR)szErrMsg,"Driver Message",MB_OK);
                GlobalUnlock(hUserBuf);
                GlobalFree(hUserBuf);
                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);
			
			    bThreadloop = TRUE;
			}

            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:
			{ 
            //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(hUserBuf);
                GlobalFree(hUserBuf);
                DRV_FreeDMABuffer(DriverHandle, (LPARAM)&pBuffer);
                DRV_DeviceClose((LONG far *)&DriverHandle);      
				return 0;
            }   

			if ( gwEvtFlag == 0 )
			{
				// Step 2: Get real voltage of Buffer from driver memory buffer
				ptFAITransfer.ActiveBuf = 0;   // single buffer
				ptFAITransfer.DataType = gwDataType;
				ptFAITransfer.start    = 0;
				ptFAITransfer.count    = gulConvNum;
				ptFAITransfer.overrun  = &gwOverrun;
				
				if ((ErrCde = DRV_FAITransfer(DriverHandle,
					(LPT_FAITransfer)&ptFAITransfer)) != 0)
				{
					DRV_GetErrorMessage(ErrCde,(LPSTR)szErrMsg);
					MessageBox(hWnd,(LPCSTR)szErrMsg,"Driver Message",MB_OK);
					GlobalUnlock(hUserBuf);
					GlobalFree(hUserBuf);
					DRV_FreeDMABuffer(DriverHandle, (LPARAM)&pBuffer);
					DRV_DeviceClose((LONG far *)&DriverHandle);
					return 0;
				}
				
				// Display data
				DialogBox (hInstance, MAKEINTRESOURCE(IDD_DATA),
					hWnd, lpfnShowDataDlgProc) ;
				
				// Step 3: Free buffer
				GlobalUnlock(hUserBuf);
				GlobalFree(hUserBuf);
				DRV_FreeDMABuffer(DriverHandle, (LPARAM)&pBuffer);
				
				// Step 4: Close driver
				DRV_DeviceClose((LONG far *)&DriverHandle);
				
				EnableMenuItem(hMenu, IDM_RUN, MF_ENABLED | MF_BYCOMMAND);
				EnableWindow(hwndStopButton, FALSE);
				EnableWindow(hwndStatusButton, FALSE);
			}
			
            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(hUserBuf);
                GlobalFree(hUserBuf);
                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", ulBuffCount);
                if (gwHalfReady == 0)
                    strcpy(szTemp, "Buffer : not  ready\n");
                else if (gwHalfReady == 1)
                    strcpy(szTemp, "Buffer : half ready\n");
                else if (gwHalfReady == 2)
                    strcpy(szTemp, "Buffer : full ready\n");
                else
                    strcpy(szTemp, "Buffer : unknow \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;
    char  szBuff[50];
    HDC hdc;

    // Check message
    ptCheckEvent.EventType = &usEventType;
    ptCheckEvent.Milliseconds = INFINITE;
    ulInterruptCount = 0;
    ulOverRunCount = 0;
    ulBuffCount = 0;
    
    while(bThreadloop)
    {

		bThreadflag = TRUE;
        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();
            ulInterruptCount++;
        }


        // Process buffer change event
        if (usEventType & ADS_EVT_BUFCHANGE)
        {
           ulBuffCount++;           
            adBufChangeEvent();
        }

        // Process overrun event
        if (usEventType & ADS_EVT_OVERRUN)
        {
           ulOverRunCount++;
            adOverrunEvent();
        }

        // Process terminate event
        if (usEventType & ADS_EVT_TERMINATED)
        {
            adTerminateEvent();		
            return ;
        }
        hdc=GetDC(hWnd);
        sprintf(szBuff,"Buff Change Count: %d", ulBuffCount );
        TextOut(hdc,200,50, szBuff, strlen(szBuff));
        sprintf(szBuff,"Interrupt Count: %d", ulInterruptCount );
        TextOut(hdc,200,70, szBuff, strlen(szBuff));
        sprintf(szBuff,"Overrun Count: %d", ulOverRunCount );
        TextOut(hdc,200,90, szBuff, strlen(szBuff));
        ReleaseDC(hWnd,hdc);

		bThreadflag = FALSE;
    }

}

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

//------------------------------------------------------------------
void adBufChangeEvent()
{
   HDC hdc;
   LPVOID temp;
   int i;

   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 ;
    }
     ptFAITransfer.ActiveBuf = 0;   // single buffer
     ptFAITransfer.DataType = gwDataType;
     ptFAITransfer.start    = 0;
     ptFAITransfer.count    = gulConvNum;
     ptFAITransfer.overrun  = &gwOverrun;

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

     if (gwDataType == 0)
        temp = (USHORT far *)ptFAITransfer.DataBuffer;
     else
        temp = (FLOAT far *)ptFAITransfer.DataBuffer;
     
     hdc=GetDC(hWnd);     
     for(i = 0; i < 20; ++i)
     {        
        if (gwDataType == 0)
           sprintf(szBuffer, "Buf[%ld] = %4x",i, ((USHORT far *)temp)[i]);
        else
           sprintf(szBuffer, "Buf[%ld] = %10.6f", i, ((FLOAT far *)temp)[i]);
        TextOut( hdc, 200, 150 + 20*i, szBuffer, strlen(szBuffer));
     }
     ReleaseDC(hWnd,hdc);

    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;   // single buffer
    ptFAITransfer.DataType = gwDataType;
    ptFAITransfer.start    = 0;
    ptFAITransfer.count    = gulConvNum;
    ptFAITransfer.overrun  = &gwOverrun;

    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(hUserBuf);
    GlobalFree(hUserBuf);
    DRV_FreeDMABuffer(DriverHandle, (LPARAM)&pBuffer);

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

    EnableMenuItem(hMenu, IDM_RUN, MF_ENABLED | MF_BYCOMMAND);

    return;
}