Compact Rio - Multiple RT Threads communicating with FPGA

[khol]

Hello,

What is the proper way to configure the OPEN FPGA REFERENCE call in Labview when multiple threads running on the RT side need to communicate with processes running on the FPGA?

Thanks,

- Jim

[Christian Mergl]

You can open multiple instances to the same FPGA VI, but since there is just a single bifile it is a shared resource. So you might introduce adittional jitter to your timecritical code.

But since accessing IOs or DMAs of the FPGA VI is really, really fast, you might not notice it.

You could also create an API for accessing the FPGA which you could use as a SubVI configured as Subrouting with "skip if busy is true", or you could handle all the access to the FPGA in a single thread and use other mechanisms to share the data among your RT VI.

Christian

[khol]

Thanks, Christian.

I'll give them a try.

Thanks again.

- Jim