gf.c

机械工业出版社 Lab Windows/CVI逐步深入与开发实例源代码

                                                                        ViConstString channelName,
                                                                        ViAttr attributeId,
                                                                        ViReal64 value);
static ViStatus _VI_FUNC GFAttrFMInternalWaveform_WriteCallback (ViSession vi,
                                                                       ViSession io,
                                                                       ViConstString channelName,
                                                                       ViAttr attributeId,
                                                                       ViInt32 value);
static ViStatus _VI_FUNC GFAttrFMInternalWaveform_ReadCallback (ViSession vi,
                                                                      ViSession io,
                                                                      ViConstString channelName,
                                                                      ViAttr attributeId,
                                                                      ViInt32 *value);
static ViStatus _VI_FUNC GFAttrFMInternalWaveform_CheckCallback (ViSession vi,
                                                                       ViConstString channelName,
                                                                       ViAttr attributeId,
                                                                       ViInt32 value);
static ViStatus _VI_FUNC GFAttrFMInternalFrequency_WriteCallback (ViSession vi,
                                                                        ViSession io,
                                                                        ViConstString channelName,
                                                                        ViAttr attributeId,
                                                                        ViReal64 value);
static ViStatus _VI_FUNC GFAttrFMInternalFrequency_ReadCallback (ViSession vi,
                                                                       ViSession io,
                                                                       ViConstString channelName,
                                                                       ViAttr attributeId,
                                                                       ViReal64 *value);
static ViStatus _VI_FUNC GFAttrFMInternalFrequency_CheckCallback (ViSession vi,
                                                                        ViConstString channelName,
                                                                        ViAttr attributeId,
                                                                        ViReal64 value);

static ViStatus _VI_FUNC GFAttrOutputEnabled_CompareCallback (ViSession vi,
                                                              ViConstString channelName,
                                                              ViAttr attributeId,
                                                              ViBoolean coercedNewValue,
                                                              ViBoolean cacheValue,
                                                              ViInt32 *result);

/*****************************************************************************
 *------------ User-Callable Functions (Exportable Functions) ---------------*
 *****************************************************************************/

/*****************************************************************************
 * Function: GF_init   
 * Purpose:  VXIplug&play required function.  Calls the   
 *           GF_InitWithOptions function.   
 *****************************************************************************/
ViStatus _VI_FUNC GF_init (ViRsrc resourceName, ViBoolean IDQuery,
                                 ViBoolean resetDevice, ViSession *newVi)
{   
    ViStatus    error = VI_SUCCESS;

    if (newVi == VI_NULL)
        {
        Ivi_SetErrorInfo (VI_NULL, VI_FALSE, IVI_ERROR_INVALID_PARAMETER, 
                          VI_ERROR_PARAMETER4, "Null address for Instrument Handle");
        checkErr( IVI_ERROR_INVALID_PARAMETER);
        }

    checkErr( GF_InitWithOptions (resourceName, IDQuery, resetDevice, 
                                        "", newVi));

Error:  
    return error;
}

/*****************************************************************************
 * Function: GF_InitWithOptions                                       
 * Purpose:  This function creates a new IVI session and calls the 
 *           IviInit function.                                     
 *****************************************************************************/
ViStatus _VI_FUNC GF_InitWithOptions (ViRsrc resourceName, ViBoolean IDQuery,
                                            ViBoolean resetDevice, ViString optionString, 
                                            ViSession *newVi)
{   
    ViStatus    error = VI_SUCCESS;
    ViSession   vi = VI_NULL;
    
    if (newVi == VI_NULL)
        {
        Ivi_SetErrorInfo (VI_NULL, VI_FALSE, IVI_ERROR_INVALID_PARAMETER, 
                          VI_ERROR_PARAMETER5, "Null address for Instrument Handle");
        checkErr( IVI_ERROR_INVALID_PARAMETER);
        }

    *newVi = VI_NULL;
    
        /* create a new interchangeable driver */
    checkErr( Ivi_SpecificDriverNew ("GF", optionString, &vi));  
    
        /* init the driver */
    checkErr( GF_IviInit (resourceName, IDQuery, resetDevice, vi)); 
    *newVi = vi;
    
Error:
    if (error < VI_SUCCESS) 
        Ivi_Dispose (vi);
        
    return error;
}

/*****************************************************************************
 * Function: GF_IviInit                                                       
 * Purpose:  This function is called by GF_InitWithOptions  
 *           or by an IVI class driver.  This function initializes the I/O 
 *           interface, optionally resets the device, optionally performs an
 *           ID query, and sends a default setup to the instrument.                
 *****************************************************************************/
ViStatus _VI_FUNC GF_IviInit (ViRsrc resourceName, ViBoolean IDQuery,
                                    ViBoolean reset, ViSession vi)
{
    ViStatus    error = VI_SUCCESS;
    ViSession   io = VI_NULL;
    
    checkErr( Ivi_BuildChannelTable (vi, CHANNEL_LIST, VI_FALSE, VI_NULL));
    
     /* Add attributes */
    checkErr( GF_InitAttributes (vi));

    if (!Ivi_Simulating(vi))
        {
        ViSession   rmSession = VI_NULL;

        /* Open instrument session */
        checkErr( Ivi_GetAttributeViSession (vi, VI_NULL, IVI_ATTR_VISA_RM_SESSION, 0,
                                             &rmSession)); 
        viCheckErr( viOpen (rmSession, resourceName, VI_NULL, VI_NULL, &io));
        /* io session owned by driver now */
        checkErr( Ivi_SetAttributeViSession (vi, VI_NULL, IVI_ATTR_IO_SESSION, 0, io));  

		/* Configure VISA Formatted I/O */
		viCheckErr( viSetAttribute (io, VI_ATTR_TMO_VALUE, 5000 ));
		viCheckErr( viSetBuf (io, VI_READ_BUF | VI_WRITE_BUF, 4000));
		viCheckErr( viSetAttribute (io, VI_ATTR_WR_BUF_OPER_MODE, VI_FLUSH_ON_ACCESS));
		viCheckErr( viSetAttribute (io, VI_ATTR_RD_BUF_OPER_MODE, VI_FLUSH_ON_ACCESS));
        }
        
    /*- Reset instrument ----------------------------------------------------*/
    if (reset) 
        checkErr( GF_reset (vi));
    else  /*- Send Default Instrument Setup ---------------------------------*/
        checkErr( GF_DefaultInstrSetup (vi));

    checkErr( GF_CheckStatus (vi));
	
	if (IDQuery)
	    viCheckWarn( VI_WARN_NSUP_ID_QUERY);
	
	if (reset && error == VI_SUCCESS )
	    viCheckWarn( VI_WARN_NSUP_RESET);

Error:
    if (error < VI_SUCCESS)
        {
        if (!Ivi_Simulating (vi) && io)
            viClose (io);
        }
    return error;
}

/*****************************************************************************
 * Function: GF_close                                                           
 * Purpose:  This function closes the instrument.                            
 *
 *           Note:  This function must unlock the session before calling
 *           Ivi_Dispose.
 *****************************************************************************/
ViStatus _VI_FUNC GF_close (ViSession vi)
{
    ViStatus    error = VI_SUCCESS;
    
    checkErr( Ivi_LockSession (vi, VI_NULL));
    
    checkErr( GF_IviClose (vi));

Error:    
    Ivi_UnlockSession (vi, VI_NULL);
    Ivi_Dispose (vi);  

    return error;
}

/*****************************************************************************
 * Function: GF_IviClose                                                        
 * Purpose:  This function performs all of the drivers clean-up operations   
 *           except for closing the IVI session.  This function is called by 
 *           GF_close or by an IVI class driver. 
 *
 *           Note:  This function must close the I/O session and set 
 *           IVI_ATTR_IO_SESSION to 0.
 *****************************************************************************/
ViStatus _VI_FUNC GF_IviClose (ViSession vi)
{
    ViStatus error = VI_SUCCESS;
    ViSession io = VI_NULL;

        /* Do not lock here.  The caller manages the lock. */

    checkErr( Ivi_GetAttributeViSession (vi, VI_NULL, IVI_ATTR_IO_SESSION, 0, &io));

Error:
    Ivi_SetAttributeViSession (vi, VI_NULL, IVI_ATTR_IO_SESSION, 0, VI_NULL);
    if