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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The waveform window will display the captured waveforms. Instead of loading the resulting. Now we will include some ChipScope modules in the counter example in order to allow us to do run-time debugging of the internal signals on the FPGA. Example Verilog code showing how to instantiate the ILA core, and a ika “black-box” definition of the core.
Make sure Virtex II is selected as the device family. Select core type to generate: The sample memory of the analyzer is limited by the memory resources of the FPGA.
We might also specify certain trigger conditions upon which we desired the tool to commence storing data for subsequent display and analysis. 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. During the “Translate” portion of the design compilation process, the.
Leave the remaining three checkboxes unchecked and click “Next”.
ChipScope Integrated Logic Analyzer (ILA)
The trig0 port on the ILA should be connected to the signals that you wish to probe with the ChipScope analyzer. See Xilinx Answer Recordwhich recommends the following workarounds: You can have multiple ILA blocks for separate parts of your design.
This is a known bug in ChipScope 6. Under Trig0, choose a trigger width of 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.
In some cases, the physical construction of the unit in question means that test headers chipsope of use only at the board level and not during system integration. This is where you will connect the signals you wish to analyze.
The functionality of these modules will be filled in when the.
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. In your project chipsope, you should now have a number of new files icon. ChipScope Analyzer also provides the interface for setting the trigger criteria for the ChipScope cores, and for displaying the waveforms recorded by those cores.
Change the trigger width to a number that, when divided by eight, does not leave a remainder of 1, 2, 3, or 4. Type eight zeros, and then return. Select the “Data same as Trigger” box, which allows you to view all the signals of interest, as well as to potentially trigger on all of them. For this tutorial, you will need two different types of modules: To group analyzer channels into a bus, expand the “Data Port” item in the window pane labeled “Signals: Choose for data depth.
You have now generated all the necessary ChipScope hardware blocks, and are ready to include them in the existing counter design. In the Trigger Setup window, highlight the last eight “X”s of the value field. You only need one ICON in your design.
Logic analyzers are, of course, still employed today. Having configured the target device, you can then connect to the target over JTAG using the ChipScope Analyzer tool and trigger on the waveform of interest as illustrated in the screenshot below. ChipScope will begin downloading the.
chipscooe Start Project Navigator, and open the counter project. Using virtual logic analyzers may remove the need for test headers. Afterwards, you instantiate these cores in your Verilog code, and you connect those modules to the signals you want to monitor.
Click “Select New File” in the dialog that appears, and then select the labkit. Name the new bus count. Make sure the top-level module labkit is selected in the source tree, and double-click on “Generate Programming File in the processes window, to compile the design. 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 chupscope use with FPGAs.
Debugging with ChipScope ( labkit)
Match units allow you to create different trigger vectors so that you can trigger on a sequence of different vectors: For example, while your design is lia on the FPGA, you can trigger when certain events take place and view any of your design’s internal signals. Indeed, I am working on one such project at the time of this writing. 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.
Generally, ChipScope sampling rate will be the same as the design’s clock frequency. The black-box definitions will look like this module icon control0 ; output [ Sadly, however, in many cases they do not remove the need to rebuild the code.
This tutorial builds on the simple counter project, described in the Getting Started tutorial. As with their physical counterparts, these virtual logic analyzers — like ChipScope from Xilinx, Identify RTL Debugger from Synopsys, Reveal from Lattice Semiconductor, and Chipsxope from Altera — can be set up so that they will only start collecting data after certain trigger conditions have been met.