picontrol-rs

Rust version of the PiControl driver for the Revolution Pi

How to generate the Rust FFI bindings to C

1. Use bindgen binary directly:

   bash TARGET=armv7-unknown-linux-gnueabihf bindgen -o src/picontrol.rs kunbus/interface/piControl/wrapper.h -- -I`pwd`/kunbus/interface/piControl

2. Use bindgen with a build.rs file

Rust cross-compilation

Cross project with Docker

See: https://github.com/rust-embedded/cross

Same operating system

See: https://medium.com/@wizofe/cross-compiling-rust-for-arm-e-g-raspberry-pi-using-any-os-11711ebfc52b

```bash source $HOME/.cargo/env

sudo apt-get install -qq gcc-arm-linux-gnueabihf rustup target add armv7-unknown-linux-gnueabihf ```

Configure Cargo for cross-compilation

```bash mkdir -p ~/.cargo

> should not be included when pasting

cat >> ~/.cargo/config << EOF [target.armv7-unknown-linux-gnueabihf] linker = "arm-linux-gnueabihf-gcc" EOF

you may need to install this on Ubuntu 18.06

sudo apt-get install g++-multilib libc6-dev-i386 sudo apt-get install -qq gcc-arm-linux-gnueabihf ```

You can now compile:

bash cargo build --target=armv7-unknown-linux-gnueabihf