using Xilinx design tools. Place and route the design with ILA cores. Download bit-stream on to FPGA and analyze the signals using chipscope. Xilinx ChipScope ICON/VIO/ILA Tutorial. The Xilinx ChipScope tools package has several modules that you can add to your Verilog design to. If you are new to FPGAs, one aspect of the development flow you may not have considered is how you will go about debugging your design.

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Debugging with ChipScope ( labkit)

The waveform window should now only contain the bit bus count. As with the ICON core, the output netlist should be generated in your project directory, and the device family should be set to Virtex II.

One solution to this problem — a solution that has seen great advances over the last few years — has been the development of in-chip logic analyzers for use with FPGAs. Generally, ChipScope sampling rate will be the same as the design’s ilz frequency.

It is therefore not possible to detect glitches with ChipScope. Now we will include some ChipScope modules in the counter example in order to allow us to do run-time debugging il the internal signals on the FPGA. One of the tools we would have employed would be a logic analyzer.

Select core type to generate: Instead of loading the resulting. And one further problem is that, inevitability, the logic analyzer you are using will also be required by one or more other project teams, which means you all have to agree on how you will allocate the analyzer resources. This is a known bug in ChipScope 6. The big downside with this approach comes in designs that are already utilizing most of the devices programmable resources, because this will limit any logic analyzer implementations.


Using virtual logic analyzers may remove the need for test headers. Click on the “T!

See Xilinx Answer Recordwhich recommends the following workarounds: To group analyzer channels into a bus, expand the “Data Port” item in the window pane labeled “Signals: The trig0 port on the ILA should be connected to the signals that you wish to probe with the ChipScope analyzer.

In the Trigger Setup window, highlight the last eight “X”s of the value field. Under clock settings, choose to sample on the rising edge of the clock.

Chipscope Ila doesn’t show anything!

This site uses cookies More info No problem. Name the new bus count. For example, while your design is running on the FPGA, you can trigger when certain events take place and view any of your design’s internal signals.

Example Verilog code showing how to instantiate the ILA core, and a dummy “black-box” definition of the core.

Chipscope Ila doesn’t show anything! – Q&A – FPGA Reference Designs – EngineerZone

For this tutorial, you only need 1 match unit. The black-box definitions will look like this module icon control0 ; output [ If your design had multiple up to 15 ILA modules, each would be connected to a different control port on the ICON, using a unique bit control bus.

You have now generated all the necessary ChipScope hardware blocks, and are ready to include them in the existing counter design. A dialog box will appear that lets you create the necessary hardware modules for your FPGA.

Now, let’s change the trigger setup to trigger when the lower eight bits of the count bus are all zero. As with their physical counterparts, these virtual logic analyzers — like Chipsccope from Xilinx, Identify RTL Debugger from Synopsys, Reveal from Lattice Semiconductor, and SignalTap from Altera — can be set up so that they will only start collecting data after certain trigger conditions have been met.


This is the window length for your ILA. Logic analyzers are, of course, still employed today. Sadly, however, in many cases they do not remove the need to rebuild the code.

Leave all other settings at chipscopee default values and click “Next”. Watch the progress indicator in the lower-right corner of the ChipScope window. Make sure the top-level module labkit is selected in the source tree, and double-click on “Generate Programming Chipscpoe in the processes window, to compile the design.

Under Trig0, choose a trigger width of This allows you to have different groups to choose from when you do your triggering at run-time. ChipScope is a set of tools made by Xilinx that allows you to easily probe the internal signals of your design inside an FPGA, much as you would do with a logic analyzer. You only need one ICON in your design. Choose for data depth. If you are new to FPGAs, one aspect of the development flow you may not have considered is how you will go about debugging your design once it has been loaded into the FPGA.

Using ChipScope ILA

For example cyipscope your Trigger Width is 20, change it to If you no longer have that project setup, create a new project in Project Navigator, and add the following files. This file also provides a dummy “black-box” definition of the core. Then we would run the system and try to work out what the heck was happening.