gbesnard/nrf52-rust-c

Running static Rust lib alongside C on nRF52-DK.

Introduction

Embed a rust static library alongside C code on a nRF52-DK (nRF52832).

Project template is based on "ble app blinky" example from nRF5 SDK.

Pre build script

At each compile from Segger Embedded Studio, pre-build.sh script is run. It will:

• compile rust library, which will:
  • use rust-bindgen to generate a Rust bindings to C functions (bindings.rs)
  • compile a rust static library (.a)
• use cbindgen to generate C bindings to Rust functions (rust_embedded_lib.h file)

Capability

• debugger seems to work for rust code, but we have to specify where to find .rs files, not found automatically by the IDE.
• can call Rust function from C code, passing and returning basic type.
• can call C function from Rust code.

Improvement

• test interacting with peripheral
• try unofficial nrf HAL from https://github.com/nrf-rs/nrf-hal

Dependencies

• cargo
• cbindgen
• rust-bindgen
• segger embedded studio

References

• https://docs.rust-embedded.org/book/interoperability/rust-with-c.html
• https://docs.rust-embedded.org/book/interoperability/c-with-rust.html
• https://dev.to/apollolabsbin/rust-ffi-and-cbindgen-integrating-embedded-rust-code-in-c-59f8