Does Visa support the VI_ATTR_PXI_RECV_INTR_DATA?

[GBL2006]

Dear all,

I have a problem, the code is like this:

ViStatus _VI_FUNCH IHandler(ViSession vi, ViEventType etype, ViEvent event, ViAddr uhandle)

{

[GBL2006]

Dear all,

I have a problem, the code is like this:

ViStatus _VI_FUNCH IHandler(ViSession vi, ViEventType etype, ViEvent event, ViAddr uhandle)

{

     u32 intValue;

     status = viGetAttribute(vi, VI_ATTR_PXI_RECV_INTR_DATA, &intValue);

     intValue &= 0x000A0000;

     switch(intValue){

           case 0x00080000:

                   theSTIM->renew_stim();

                   return VI_SUCCESS;

           case 0x00020000;

                   theTEST->renew_test();

                   return VI_SUCCESS;

           default:

                   return VI_SUCCESS;

     };

}

In the NI Spy, I got messsage as follows:

.......

Invoking VISA user callback(0x024BE270, PXI_INTR, 0x024BF4A8, 0x00BC614E)              0      ................................

viGetAttribute(0x024BE270, PXI_RECV_INTR_DATA, "<INVALID>")                                     0xBFFF001D     ......................................

.......

I am wondering whether the visa3.1 supports the attribute of VI_ATTR_PXI_RECV_INTR_DATA or not.

If it does, why I have this problem?

Thanks

George

[DiegoF]

Hi George,

Both VI_ATTR_PXI_RECV_INTR_DATA and VI_ATTR_PXI_RECV_INTR_SEQ are attributes of the event, not the session.  The handler should be:

ViStatus _VI_FUNCH IHandler(ViSession vi, ViEventType etype, ViEvent event, ViAddr uhandle)

{

     u32 intValue;

     status = viGetAttribute(event, VI_ATTR_PXI_RECV_INTR_DATA, &intValue);

     [ ...  ]

}

Hope it helps,
Diego