labview_fpga_compactrio

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LabVIEW FPGA and CompactRIO

Wei Lin, PhDDepartment of Biomedical Engineering

Stony Brook University

631-632-1639Email: [email protected]


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What is FPGA?

A field-programmable gate arrayis a semiconductor devicecontaining programmable logic

components called "logicblocks", and programmableinterconnects.

From: Wikipedia


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Inside the I/O Block

FPGA Configurable I/O block (Xilinx)


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Inside the Logic Block

FPGA Configurable logic block (CLB) (Xilinx)


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Inside Interconnect

FPGA programmable interconnect (Xilinx)

Two types of interconnect: Local and Global


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FPGA Design Flow

Design: determine functionality anddescribe the functionality usinghardware description language suchas VHDL.

Verification: Use simulator to verifyfunctionality.

Synthesis: Use CAD tools generate

optimized bit-stream file to programthe FPGA.

The process has a steep learning curve.


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LabVIEW FPGA

The NI LabVIEW FPGA Module uses LabVIEW

graphic program technology to generate bit-stream file for FPGA.

LabVIEW FPGA Module can simulate thefunctionality of FPGA

Advantages of LabVIEW FPGA module: Easy to use, no requirement on the knowledge of

HDL

The parallel processing of LabVIEW is well fit forFPGA

Limitation of LabVIEW FPGA module: It currently targets NI FPGA hardware such as

CompactRIO.


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LabVIEW FPGA Features

Graphic Design

Built-in VIs for Control, Filtering,and Signal Generation IP

Implementation of FIFO, DMA andinterrupt

HDL Interface Node to import HDLcode

Fixed-point support

Component-Level IP (CLIP)


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NI CompactRIO System

NI CompactRIO system is an advanced embedded system for dataacquisition. Its open architecture, small form factor and extremeruggedness enables engineers to quickly build custom embedded

systems.


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NI CompactRIO System

Running RT VIson controller

FPGA code forchassis

backbone

CompactRIOI/O Module


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LabVIEW VI Design for CompactRIO

Host VIs RT VIs FPGA VIs

Three types of VIs required.CompactRIO can run independently from host PC.

Ethernet Cable


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Applications of LabVIEW FPGA

Embedded control system

Communication protocol evaluation

Hardware in the loop


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