Re: LabView interface to EPICS

["Faucett, John A" <faucett@lanl.gov>]

Emmanuel Mayssat  wrote:

Let me see if I understand correctly.
You use a device like the cRIO ( http://www.ni.com/compactrio/ ) that include a FPGA.
That FPGA is running code (VHDL +) generated and downloaded through LabView.

LabVIEW can create the FPGA code but it does require a different technique than non-FPGA LabVIEW.

The FPGA is programmed for 2 functions: (1) interface with the hardware (2) run an embedded EPICS IOC.

Once the FPGA is programmed, you can interface with its process variable (PV)  to change (let's say) a digital output.

No, the cRIO runs VxWorks and EPICS in the non-FPGA processor.  For input the FPGA moves results from the cRIO modules to a place for run-time LabVIEW to fetch and make available via shared memory to the EPICS device support.

Now we're pretty much at the limit of what I know since I am not the implementor of this scheme.  You might try googling 'fpga labview epics'.

John Faucett

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