Hyperloop

Hyperloop is a priority based async runtime targeting embedded systems written in Rust.

Project aims

• Provide a lean async runtime suitable for resource constrained microcontrollers.

• No heap allocations.

• No critical sections, using atomics for all synchronization, thus being multicore friendly.

• Being a fully fledged alternative to stackful RTOS's with priority based scheduling, but with stackless asynchronous tasks.

Minimum supported Rust version (MSRV)

Hyperloop requires nightly for the time being, due to dependence on unstable features.

FAQ

Why async? Can't we just use plain old stackful tasks?

Async tasks have a minimal memory footprint and are a good fit for memory constrained microcontrollers. Tasks should be cheap and you should be able to another task without having to worry much about memory usage. Stackful tasks need a lot of memory for the stack, especially if you need string formatting for logging. Stackful tasks do allow for preemption, but it comes at a high price.

How does Hyperloop differ from Embassy

Embassy provides not only an executor, but a whole embedded async ecosystem. Hyperloop is much more limited in scope. The main difference between the Embassy exeutor and Hyperloop is that Hyperloop uses priority based scheduling.