Espressif (the makers of the hugely popular ESP32/ESP8266/... microcontrollers) hired an embedded Rust community member to work full time on Rust support for their chips:
https://mabez.dev/blog/posts/esp-rust-espressif/
There's at least a decent amount of interest from both industry (auto tier 1's, for example) and from vendors; I'd love to name names here but I'm pretty sure I can't. :)
> But are there any vendors actively participating in or supporting Embedded Rust?
That's kind of an interesting question.
While obviously vendor participation can lead to some positive outcomes; my impression is some part of the motivation for Rust targeting the embedded space (and not waiting on vendors) is to avoid reliance on hardware vendors.
Due largely to the poor reputation hardware vendors have in regard to anything in the software tool/firmware space within the C ecosystem.
In addition to what others have said, ARM has participated in the RFC process, donated CI resources, and joined the Rust Foundation.
There are also a large number of things going on in industry that aren’t yet truly public. Some of these are the “I know something I can’t say” variety and some are the variety of “wow another car manufacturer has posted an embedded Rust job?”