rust-psp

You'll need Rust nightly and the source component for cross-compilation.

bash
rustup default nightly
rustup component add rust-src

Download a prebuilt binary from Releases, or build from source.

bash
# From crates.io (or GitHub Releases for prebuilt binaries)
cargo install cargo-psp

Set up a new Cargo project and write your first PSP module.

bash
cargo new hello-psp && cd hello-psp

Add psp to your Cargo.toml, then write your entry point:

rust
#![no_std]
#![no_main]

use psp;

psp::module!("hello_psp", 1, 1);

fn psp_main() {
    psp::dprintln!("Hello from the PSP!");
}

Build your project into an EBOOT.PBP that the PSP can run.

bash
cargo +nightly psp --release
# Output: target/mipsel-sony-psp/release/EBOOT.PBP

Copy the EBOOT.PBP to your PSP's ms0:/PSP/GAME/hello_psp/ folder, or open it in PPSSPP.