This crate ships a minimal async executor suitable for embedded environments.
no_std and ISR-friendly. A thin wrapper around the async-task executor framework, which is also used by smol.
Suitable for MCU development, bare-metal or on top of an RTOS (e.g. FreeRTOS).
NOTE: This executor DOES require the alloc crate and does allocate when spawning a task (and only then).
For a completely static, no-alloc friendly executor, look at embassy-executor.