addma.c

研华单通道ad采集程序

            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:
			{
             BOOL bflag = TRUE;
             // Close thread
			 bThreadloop = FALSE;
             Sleep(100);

             while(bflag)
			 {
			  if(bThreadflag==FALSE)
			  {
                EnableWindow(hwndStopButton, FALSE);
                EnableWindow(hwndStatusButton, FALSE);
				bflag=FALSE;
			  }
			 }

            // Step 1: Stop A/D conversion for high speed
            if ((ErrCde = DRV_FAIStop(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;
            }

            // 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);

            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", gwCyclicCount);
                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;
    DWORD TickValue;

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

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

		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();

        // 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 ;
        }

		bThreadflag = FALSE;
    }

}

//------------------------------------------------------------------
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)  // first ready
    {
        ptFAITransfer.ActiveBuf = 0;   // single buffer
        ptFAITransfer.DataType = gwDataType;
        ptFAITransfer.start    = 0;
        ptFAITransfer.count    = gulConvNum/2;
        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 ;
        }
    }
    else if (gwHalfReady == 2) // second half ready
    {
        ptFAITransfer.ActiveBuf = 0;   // single buffer
        ptFAITransfer.DataType = gwDataType;
        ptFAITransfer.start    = gulConvNum/2;
        ptFAITransfer.count    = gulConvNum/2;
        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 ;
        }

        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);

    // Stop A/D conversion
    if ((ErrCde = DRV_FAIStop(DriverHandle)) != 0)
    {
        DRV_GetErrorMessage(ErrCde,(LPSTR)szErrMsg);
        MessageBox(hWnd,(LPCSTR)szErrMsg,"Thread Message",MB_OK);
        return ;
    }

    // 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;
}