VHDL-Code within Labview
in [LabView]
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From: Andreas on 7 May 2008 04:41 Hi @all, I've to admit, that I don't know Labview by now, therefor I've a question on a topic I couldn't find a satisfying answer on in the internet. My intention is to control test board using a digital I/O-card (no FPGA). For the development of the test board (or more precisely the chips on that board) a VHDL-Simulation has been used and a VHDL-Testbench has been implemented. I could synthesize the VHDL-testbench on a FPGA-Board, but I would prefer to Labview and a digital I/O-card. My question is: Is it possible to implement VHDL-Entities in LabView? If yes, which LavView Modules do a need? I've read something about a "HDL Interface Node" included in "LabVIEW FPGA Module" since v.7.1, but I don't have the "LabVIEW FPGA Module" and I don't won't to program a FPGA. I only want to use my existing (complex) VHDL-statemachine to assign a few ouputs. Timing and speed are not a problem. Is there a way to do that with Labview? Thanks, Andreas
From: ryanb on 7 May 2008 09:40 It sounds like your are asking for the ability to use LabVIEW to simulate your VHDL files. You would then use these HDL simulation results as digital test vectors for a DIO board. LabVIEW today does not natively include this capabiliity. I believe you have a few options: 1 - Many VHDL simulation software packages can be called from the command line. You could build a LabVIEW VI to call your simulation tool, run your testbench and parse the results into a digital waveform for your DIO board. NI Multisim may allow for this as well (I'm not sure, so you'll need to do some Multisim research before going this route). 2 - Use the NI Digital Waveform Editor to import your simulation output as a test vector. You can then verify the waveforms, make any changes, and save it for use with your DIO board. Here is a link: <a href="http://sine.ni.com/nips/cds/view/p/lang/en/nid/13050" target="_blank">http://sine.ni.com/nips/cds/view/p/lang/en/nid/13050</a> 3 - The HDL node available in LV FPGA allows you to synthesize custom HDL into a LV FPGA target. If you prefer the DIO board as your interface, then this would not work for you. Based on your notes, I would look into the Digital Waveform Editor's VCD importing feature first (option 2 above). Which DIO board are you using? And what do you use for VHDL simulation/synthesis for your test board? -RB
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