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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Using ChipScope ILA | ADIUVO Engineering
Afterwards, you instantiate these cores in your Verilog code, and you connect those modules to the signals you want to monitor. 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. It is therefore not possible to detect glitches cchipscope ChipScope.
In the Trigger Setup window, highlight the last eight “X”s of the value field. Sadly, however, in many cases they do not remove the need to rebuild the code. 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. Now, let’s change the trigger setup to trigger when the lower eight bits of the count bus are all zero.
See Xilinx Answer Recordwhich recommends the following workarounds: 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. One solution to this problem — a solution that has seen great advances over the chipscopd few years — has been the development of in-chip logic analyzers for use with FPGAs.
Setting up the Initial Design This tutorial builds on the simple counter project, described in the Getting Started tutorial. Type eight zeros, and then return.
If your design had multiple up to 15 ILA modules, each would be connected to a different control port on the ICON, using cipscope unique bit control bus. In your project directory, you should now have a number of new files icon. Instead of loading the resulting. One big advantage of these in-chip logic analyzers is that they offer the ability lla capture the values on wide internal busses and store these values in internal RAM.
Using ChipScope ILA
Match units allow you to create different trigger vectors so chispcope you can trigger on a sequence of different vectors: Make sure Virtex II is selected as the device family. This is the window length for your ILA. As with their physical counterparts, these virtual logic analyzers — like ChipScope 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.
Click “Select New File” in the dialog that appears, and then select the labkit. You only need one ICON in your design.
Leave the remaining three checkboxes unchecked and click chipsclpe. This is where you will connect the signals chpscope wish to analyze. 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.
Change the trigger width to a number that, when divided by eight, does not leave a remainder of 1, 2, 3, or 4. For Number of trigger ports, choose 1 for now, although for your design you are free to use up to The sample memory of the analyzer is limited by the memory resources of the FPGA.
A dialog box will appear that lets you create the necessary hardware modules for your FPGA.
Set the output netlist field so that the ICON core is generated in the counter project directory, Make sure the output netlist name ends with. Leave all other settings at their default values and click “Next”. To group analyzer channels into a bus, expand the “Data Port” item in the window pane labeled “Signals: We might also specify certain trigger conditions upon which we desired the tool to commence storing data for subsequent display and analysis.
The black-box definitions will look like this module icon control0 ; output [ For example if your Trigger Width is 20, change it to You can have multiple ILA blocks for separate parts of your design. ChipScope will begin downloading the. Watch the progress indicator in the lower-right corner of the ChipScope window.
Click the play button in the ChipScope toolbar to arm the analyzer, and wait for a trigger event. 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. Connect the programming cable to the JTAG port on the labkit, and power on the labkit. 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.
The functionality of these modules will be filled in when the. For this tutorial, you will need two different types of modules: 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.
The waveform window should now only contain the bit bus count. Click “OK” to dismiss the “Configur During the “Translate” portion of the design compilation process, the.
Chipscope Ila doesn’t show anything!
This allows you to have different groups to choose from when you do your triggering at run-time. Name the new bus count. Logic analyzers are, of course, still employed today.