Nice to see this series continued! I wish there were more, potentially non-discontinued series or books on how to build actual projects with Rust from scratch.
Originally, our first push was to get Cortex M bare metal microcontrollers as a "Tier 1" stable target for the 2018 edition of Rust.
Over the last couple months, we've been expanding, and have subteams for a bunch of different topics, including chip support, drivers, documentation, tooling, etc. We're mostly focused on helping other people who are getting started with embedded rust, as well as give feedback to the compiler teams, etc.
It would be interesting to hear more about your porting attempt, we also have a blog - https://rust-embedded.github.io/blog/ - if you'd like to share it as a blog post.
As Steve mentioned, https://github.com/rust-embedded/wg is our main coordination repo, and has links to most of the stuff we're actively working on.
