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https://github.com/greatscottgadgets/luna

Amaranth HDL framework for monitoring, hacking, and developing USB devices
https://github.com/greatscottgadgets/luna

fpga hardware usb

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Amaranth HDL framework for monitoring, hacking, and developing USB devices

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# LUNA: an Amaranth HDL library for USB ![Simulation Status](https://github.com/greatscottgadgets/luna/workflows/simulations/badge.svg) [![Documentation Status](https://readthedocs.org/projects/luna/badge/?version=latest)](https://luna.readthedocs.io/en/latest/?badge=latest)



LUNA is a toolkit for working with USB using FPGA technology, providing gateware and software to enable USB applications.



Some things you can use LUNA for, currently:



- **Protocol analysis for Low-, Full-, or High- speed USB.** LUNA provides gateware that allow passive USB monitoring when combined with [Cynthion](https://github.com/greatscottgadgets/cynthion-hardware) and [Packetry](https://github.com/greatscottgadgets/packetry).

- **Creating your own Low-, Full-, High-, or (experimentally) Super- speed USB device.** LUNA provides a collection of Amaranth gateware that allows you to easily create USB devices in gateware, software, or a combination of the two.

- **Building USB functionality into a new or existing System-on-a-Chip (SoC).** LUNA is capable of generating custom peripherals targeting the common Wishbone bus; allowing it to easily be integrated into SoC designs; and the [luna-soc](https://github.com/greatscottgadgets/luna-soc) library provides simple automation for developing simple SoC designs.



Some things you'll be able to use LUNA for in the future:



- **Man-in-the-middle'ing USB communications.** The LUNA toolkit will be able to act

  as a *USB proxy*, transparently modifying USB data as it flows between a host and a device.

- **USB reverse engineering and security research.** The LUNA toolkit will serve as an ideal

  backend for tools like [Facedancer](https://github.com/usb-tools/facedancer); allowing easy

  emulation and rapid prototyping of compliant and non-compliant USB devices.



## Project Structure



This project is broken down into several directories:



* `luna` -- the primary LUNA python toolkit; generates gateware and provides USB functionality

  * `luna/gateware` -- the core gateware components for LUNA; and utilities for stitching them together

* `examples` -- simple LUNA-related examples; mostly gateware-targeted, currently

* `docs` -- sources for the LUNA Sphinx documentation

* `contrib` -- contributed/non-core components; such as udev rules

* `applets` -- pre-made gateware applications that provide useful functionality on their own (e.g., are more than examples)



## Project Documentation



LUNA's documentation is captured on [Read the Docs](https://luna.readthedocs.io/en/latest/). Raw documentation sources

are in the `docs` folder.



## Related Projects



* [Cynthion](https://github.com/greatscottgadgets/cynthion-hardware): an open source hardware USB test instrument

* [Apollo](https://github.com/greatscottgadgets/apollo): the firmware that runs on Cynthion's debug controller and which is responsible for configuring its FPGA

* [Saturn-V](https://github.com/greatscottgadgets/saturn-v): a DFU bootloader created for Cynthion

* [Packetry](https://github.com/greatscottgadgets/packetry): software for USB analysis

* [Facedancer](https://github.com/greatscottgadgets/facedancer): software to create USB devices in Python