SRQ event not received when handling VXI interrupt event

[GAINZT]

Hi,

I'm writting a VISA server to handle and dispatch VXI events to other applications in my test system. Amongs those events are VI_EVENT_SERVICE_REQ and VI_EVENT_VXI_VME_INTR.
However, i've found that installing a VI_EVENT_VXI_VME_INTR will prevent VI_EVENT_SERVICE_REQ to occurs.
Is it a bug ?
Is it the intended behavior and why I can't find any informations on this in the VISA programmer manuals ?

[JuliaD]

Hello,

I have been looking into your question, however, I would like to gather a bit more information about your system. Can you please tell me the following:

1. What operating system you are working with?
2. What version of NI-VXI and NI-VISA are you using?
3. What type of controller is being used (i.e. VXIpc-850, MXI-2, etc.)?

In the mean time, I will continue to research what could be causing this problem. Thank you for your help.

Julia Dinolfo
Applications Engineer
National Instruments

[GAINZT]

Hello,

My test system is :
Industrial PC
Microsoft Windows NT 4
VenturCom RTX 4.3.1
NI-488.2 1.50 1.7
NI-PAL 1.5.0f0
NI-VISA 2.5.2
NI-VXI 3.2
IVI Engine 1.83

The PC is connected to the VXI mainframe using an MIX2 bus (PCI-MXI2 -> MXI2bus -> VXI-MXI2 in slot 0).

Sincerely,
Rémi THEVENIN

[JuliaD]

Hi Remi,

I have been speaking with the Product Support Engineer about this issue and he informed me that we have just released the latest version of our NI-VXI software (version 3.3). This release makes some fixes to some known event handling issues (I did not find your specific problem, but there were other similar issues). I think it is likely that this new release will fix the problem you are encountering. If not, let me know and we will try to continue to investigate the problem.

I also noticed that you are using NI-VISA 2.5.2. Up until today the latest version for this driver was 2.6 however, we also have a new version of this driver (2.6.1). NI-VXI 3.3 installs NI-VISA 2.6.1 (refer to section 5.1.2 of the readme.txt file for the
NI-VXI 3.3 driver). Note: If you already have VISA 2.5 installed, your configuration settings (aliases, serial port settings, etc.) will not be preserved. However, your old VISACONF.INI will be backed up as VISAINI.BAK in the same directory.


My suggestion is to uninstal your current VISA and VXI drivers and install NI-VXI 3.3 with NI-VISA 2.6.1. Be sure to look over the NI-VXI for Windows Read Me First document first.

You can access this download with the link below. The files should appear at the top under the title (you may need to scroll down to the bottom and click on "continue the download process" link first).

http://digital.ni.com/softlib.nsf/websearch/30FDBEF97419A01686256D120061CBEA?OpenDocument&node=

Let me know how it goes. Have a great day,

Julia Dinolfo
Applications Engineering
National Instruments

[GAINZT]

Hi Julia,

I've successfully updated my test system to NI-VISA 2.6.1 and NI-VXI 3.3.
It seems to fix my problem; however I don't if it's because of the NI-VISA or the NI-VXI update.

A question still bother me : how could I get access to the NI-IVI 3.3 update page if you didn't provided me the above link ? I can't find any access to this page from the 'driver and update' section of the ni.com web site !?!

Thanks for your help.

Rémi THEVENIN

[JuliaD]

Hi Remi,

Great to hear that your problem is fixed. I strongly believe that the updated version of the NI-VXI driver is what fixed your problem. I had you upgrade your version of NI-VISA as well, because there are some interdependencies (this would ensure that your system is the most current).

As for the availablility of the new NI-VXI 3.3 driver, it literally was released to the public yesterday. This means that our main concern was to make it available from the Web,as well as on our FTP site. You will see that the information on the Drivers and Updates pages will update shortly. When in the Drivers and Updates page, you can search for "vxi 3.3" and the first link in the list takes you to this new driver.

Regards,


Julia Dinolfo
Applicatons Engineering
National Instruments