litescope

Small footprint and configurable embedded FPGA logic analyzer

3 years after
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        Copyright 2012-2016 / EnjoyDigital

   A small footprint and configurable embedded FPGA
        logic analyzer core powered by Migen

[> Intro

LiteScope is a small footprint and configurable embedded logic analyzer that you can use in your FPGA and aims to provide a free, portable and flexible alternative to vendor's solutions!

LiteScope is part of LiteX libraries whose aims are to lower entry level of complex FPGA cores by providing simple, elegant and efficient implementations of components used in today's SoC such as Ethernet, SATA, PCIe, SDRAM Controller...

The core uses simple and specific streaming buses and will provides in the future adapters to use standardized AXI or Avalon-ST streaming buses.

Since Python is used to describe the HDL, the core is highly and easily configurable.

LiteScope is built using LiteX and uses technologies developed in partnership with M-Labs Ltd:

  • Migen enables generating HDL with Python in an efficient way.
  • MiSoC provides the basic blocks to build a powerful and small footprint SoC.

LiteScope can be used as LiteX library or can be integrated with your standard design flow by generating the verilog rtl that you will use as a standard core.

[> Features

  • IO peek and poke with LiteScopeIO
  • Logic analyser with LiteScopeAnalyzer:
    • Subsampling
    • Data storage in block rams
  • Bridges:
    • UART2Wishbone (provided by LiteX)
    • Ethernet2Wishbone ("Etherbone") (when used with LiteEth)
    • PCIe2Wishbone (when used with LitePCIe)
  • Exports formats: .vcd, .sr(sigrok), .csv, .py, etc...

[> Proven

LiteScope has already been used to investigate issues on commercial and open-source designs.

[> Possible improvements

  • add standardized interfaces (AXI, Avalon-ST)
  • add protocols analyzers
  • add signals injection/generation
  • add storage in DRAM
  • add storage in HDD with LiteSATA core
  • ... See below Support and consulting :)

If you want to support these features, please contact us at florent [AT] enjoy-digital.fr. You can also contact our partner on the public mailing list devel [AT] lists.m-labs.hk.

[> Getting started

  1. Install Python3 and your vendor's software

  2. Obtain LiteX and install it: git clone https://github.com/enjoy-digital/litex --recursive cd litex python3 setup.py install cd ..

  3. Build and load test design: go to example_designs/ ./make.py -p [your_platform] all load-bitstream Supported platforms are the ones already supported by Mibuild: de0nano, m1, mixxeo, kc705, zedboard...

  4. Test design: go to test and run: litex_server --port your_serial_port python3 test_io.py (led blinker) python3 test_analyzer.py (capture counter with analyzer)

[> Simulations

TODO

[> Tests

TODO

[> License

LiteScope is released under the very permissive two-clause BSD license. Under the terms of this license, you are authorized to use LiteScope for closed-source proprietary designs. Even though we do not require you to do so, those things are awesome, so please do them if possible:

  • tell us that you are using LiteScope
  • cite LiteScope in publications related to research it has helped
  • send us feedback and suggestions for improvements
  • send us bug reports when something goes wrong
  • send us the modifications and improvements you have done to LiteScope.

[> Support and consulting

We love open-source hardware and like sharing our designs with others.

LiteScope is mainly developed and maintained by EnjoyDigital.

If you would like to know more about LiteScope or if you are already a happy user and would like to extend it for your needs, EnjoyDigital can provide standard commercial support as well as consulting services.

So feel free to contact us, we'd love to work with you! (and eventually shorten the list of the possible improvements :)

[> Contact E-mail: florent [AT] enjoy-digital.fr

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