Rust for Parallax P2 (using RISC-V translation based on riscvp2)

This is a project for running programs compiled with the Rust programming language on the Parallax Propeller 2 (P2).

It works on the same principle as the riscvp2 C compiler for the P2 (https://github.com/totalspectrum/riscvp2), namely it uses a custom linker script to add a RISC-V to P2 JIT compiler to a RISC-V executable built with the standard Rust toolchain.

On your host PC (I used Linux Debian 12, other OSes may vary), make sure you have rust already installed via rustup. For doing that, see https://www.rust-lang.org/tools/install

Now add support for riscv32-imac:

rustup default stable
rustup target add riscv32-imacunknown-none-elf
cargo install cargo-binutils

Make sure the submodules are up to date:

git submodule update --init --recursive

Then go into riscvp2-rt and build:

cd riscvp2-rt
cargo build

And finally the test app that blinks an LED on your P2:

cd ../riscvp2-testapp
cargo run