Register VISA Event as Top Level Event Using a User Event Structure

[Pcorcs]

Overview
The following example demonstrates a method for translating VISA event handling to a top-level user event structure.

Description 

This program demonstrates a method for translating VISA event handling to a top-level user event structure. Using application control methods, VISA events may be extracted and registered at the user level; such that, program execution may be triggered by events within VISA hardware on the system.

Requirements

1. LabVIEW 2012 or later
2. NI-VISA Driver

Steps to Implement or Execute Code

1. Configure the Serial Port
2. Enable the VISA Event of your choice.
3. Create a User Event to associate the VISA event with.
4. Register for the User Event, when it is fired.
5. Use a User Event Structure to handle dynamically generated User Defined Events.
6. Wait for the VISA Event to occur.
7. Assign the VISA event status, to a Generated User Event
8. The second event case monitors for the User Event, and will execute when it is fired.
9. Close the VISA Resource.

Additional Information or References

VI Snippet

 **This document has been updated to meet the current required format for the NI Code Exchange.**

[_Xilinx_]

The "Service-Request"-event selected by default did not work for my ordinary COM-port!

"Serial character"-event Type does work!

[denibel]

Bad solution. The good one does not exist, because "Visa event" is not an "Event".

[Ting1224]

Hi denibel,

I agree with you. It seems that this example still utilizes polling instead of real event scenario.

Do you have any better solution for registering VISA event as a top level user event?

[Steve_Block]

To be more specific about the previous two poster's comments, I'm looking to not only register that the event occurred, but also have the data and timestamp included in the event buffer.