Chisel Mill Framework

This is a Chisel project template powered by mill.
It provides a minimal setup to quickly get started with Chisel and mill-based builds, avoiding the verbosity and performance overhead of SBT.

Project Structure

chisel-framework/
├── build/                  # Verilog output and other generated files
├── build.mill              # Entry point for mill build
├── Makefile                # Simplifies common mill commands
└── src/                    # Source code and tests
    ├── main/scala/         # Chisel design sources
    │   ├── Elaborate.scala
    │   └── Hello.scala
    └── test/scala/         # Unit tests
    └── HelloSpec.scala

Getting Started

1. Install mill

Follow the instructions at https://com-lihaoyi.github.io/mill.

You can install mill globally:

curl -L https://github.com/com-lihaoyi/mill/releases/download/0.11.6/0.11.6 > mill && chmod +x mill
sudo mv mill /usr/local/bin/

Or use the local wrapper script ./mill if present.

2. Build and Test

To run all Chisel tests (recommended for test-driven development):

make test

3. Generate Verilog

To elaborate your Chisel design and generate Verilog files:

make verilog

Output will be placed in the build/ directory.

4. Formatting

To reformat your Scala code using scalafmt:

make format

Ensure you have a .scalafmt.conf file in the root directory.

5. Miscellaneous

Install BSP support for editors:

make bsp

Generate IntelliJ project files:

make idea

Clean the generated build artifacts:

make clean

Notes

• This template uses Chisel 7 and ChiselTest 6.
• If you encounter formatting issues, make sure your scalafmt version is compatible with Scala 2.13 and your .scalafmt.conf is correctly configured.
• The project structure avoids SBT and uses mill for faster incremental builds and simpler configuration.