Interoperability

std::os::raw deals with low-level primitive types that can be converted implicitly by the compiler because the memory layout between Rust and C is similar enough or the same.

std::ffi provides some utility for converting more complex types such as Strings, mapping both and String to C-types that are easier and safer to handle.

As mentioned above, primitive types can be converted by the compiler implicitly.

A common requirement for including Rust in your embedded project is combining Cargo with your existing build system, such as make or cmake.

Integrating Rust with an RTOS such as FreeRTOS or ChibiOS is still a work in progress; especially calling RTOS functions from Rust can be tricky.

We are collecting examples and use cases for this on our issue tracker in issue #62.