Branan Riley has published a series of very informative tutorials  – Exploring Rust on Teensy.

The tutorials are targeted at people who have a basic knowledge of Rust and “lightweight” embedded development experience.  The first tutorial covers bootup of the processor to getting the LED to blink – with a good number of topics covered in between.  Parts two and three go on to cover serial communication and hardware allocation.  Each of the tutorials has quite a lot of information and detailed explanations of a number of topics important in embedded development.  Overall this series is a great way to get going on programming Teensy using Rust.

Branan has indicated that the next tutorial in the series will cover DMA (Direct Memory Access) and interrupts will be in another upcoming tutorial

Update on the Teensy/rust stuff: DMA as a Future works! And I think I've convinced myself it's safe! I wanted to do interrupts, but I might save those for another post. That means I'm really ready to finish the prose and get it up!

— Brananarchy (@branan) November 11, 2018

The tutorial series can be found on Github.