Rusty API for Flipper Zero

🦀 ❤️‍🔥 🐬

Project Structure

This project is composed of the following crates:

• flipper0-sys: CFFI bindings.

• flipper0: High-level idiomatic bindings and wrappers that almost looks like as std-types.

• other support crates, see docs inside

  • flipper0-build-cfg: Constants and configuration for build system
  • flipper0-fam-build: Manifest generator
  • flipper0-fap-build: Application Package build utils
  • fam: Flipper Application Package manifest format
  • flipper0-macro: Proc-macro #[main] for register and rustify entry point function.

• examples

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Bindings for Flipper Zero

Automatically generated bindings (or "externs") for Flipper Zero Fw with some little hand-crafted wrappers and additions as upper abstraction layer.

See crate description and examples.

State

Current state of the project is WiP. Highly & dirty work-in-progress. Any contribution are appreciated, you know.

Build

There's three options: using pre-built bindings, build from existing clone of flipper-firmware repo, clone and build from source.

Using pre-built bindings

Needed:

• Rust toolchain (nightly channel)
• target thumbv7em-none-eabihf
• libclang for bindgen (because bindgen as build-dependency can't be optional)

Example

crate manifest:

[dependencies]
flipper0-sys = "*"

lib.rs:

#![crate_type = "staticlib"] #![no_main] #![no_std]

extern crate flipper0_sys;
use flipper0_sys::ffi::*;

#[no_mangle]
pub unsafe extern "C" fn init(_: *mut u8) -> i32 {
	static MESSAGE: &[u8] = b"Hello, World!";
	furi_thread_stdout_write(MESSAGE.as_ptr() as _, MESSAGE.len());
	0
}

Build with cargo +nightly build --target=thumbv7em-none-eabihf.

Build bindings from source

Needed:

• Rust toolchain (nightly channel)
• target thumbv7em-none-eabihf
• libclang for bindgen
• clone of Flipper Zero firmware
  • Env var FLIPPER_FW_SRC_PATH points to the root of the fw repo
• ARM toolchain, run fbt to easily get it

crate manifest:

[dependencies.flipper0-sys]
version = "*"
default-features = false # disable prebuild
features = [
  "allocator-global",
  "oom-global",
  "panic",
  "use-local-sdk" # enable build from source
  # ...
]

Example code same as above.

Build with FLIPPER_FW_SRC_PATH=~/path/to/flipperzero-firmware/ cargo +nightly build --target=thumbv7em-none-eabihf

Also check out instructions for examples.

Build bindings from source with auto- clone remote repository

Needed:

• Rust toolchain (nightly channel)
• target thumbv7em-none-eabihf
• libclang for bindgen
• Env var FLIPPER_REPO_BRANCH with name of branch for the firmware repository (optional)
• Env var FLIPPER_REPO_REV with name of tag/revision for the firmware repository (optional)
• Env var FLIPPER_REPO_CLONE_PATH points to directory where the clone should be placed (optional)

Example code same as above, but using use-remote-sdk instead of use-local-sdk.

crate manifest:

[dependencies.flipper0-sys]
version = "*"
default-features = false # disable prebuild
features = [
  # same as above
  "use-remote-sdk" # enable build from source
]

Build with specified place:

FLIPPER_REPO_CLONE_PATH=/abs/path/ \
  cargo +nightly build --target=thumbv7em-none-eabihf

And/or with specified branch:

FLIPPER_REPO_BRANCH=release \
  cargo +nightly build --target=thumbv7em-none-eabihf

And/or with specified tag or revision:

FLIPPER_REPO_REV="0.70.1" \
  cargo +nightly build --target=thumbv7em-none-eabihf

Note:

1. FLIPPER_REPO_CLONE_PATH there used instead of FLIPPER_FW_SRC_PATH
2. By default FLIPPER_REPO_CLONE_PATH points to $OUT_DIR/sdk
3. Without specified branch or rev will be checked out head of default branch.

Build Configuration

Environment variables:

Feature	Required	Description	Use with feature
FLIPPER_FW_SRC_PATH	required	Needed to build from source in local working copy of firmware repo, points to root of the repo.	use-local-sdk
ARM_TOOLCHAIN	optional	If omitted build-script will search it in the working copy of the firmware repo. Typically should points to "arm-none-eabi" directory.	use-local-sdk, use-remote-sdk
FLIPPER_REPO_REV	optional	Revision or tag.	use-remote-sdk
FLIPPER_REPO_BRANCH	optional	Name of branch.	use-remote-sdk
FLIPPER_REPO_CLONE_PATH	optional	Path points to directory where the SDK repository will be cloned. Default is OUT_DIR/flipperzero-firmware.	use-remote-sdk

Features:

• allocator: include allocator implementation
• allocator-global: default, include global allocator implementation
• oom-global: default, out-of-mem handler. Disable it to use you custom handler or #![feature(default_alloc_error_handler)].
• panic: default, include global panic & OoM handler
• macro: include #[main] macro for FAP entry point.

Bindings gen customization features:

Can be used with use-local-sdk or use-remote-sdk features.

• derive-default
• derive-eq
• derive-copy
• derive-hash
• derive-ord
• derive-partialeq
• derive-partialord
• derive-debug - derive Debug, enabled by default for debug profile

All of these derive-features are used for bindgen configuration.

Build methods features:

Feature	Default	Description	Used ENV vars
prebuild	+	use pre-generated bindings
use-local-sdk	+	look at FLIPPER_FW_SRC_PATH, build from source	FLIPPER_FW_SRC_PATH (required), ARM_TOOLCHAIN (optional)
use-remote-sdk	-	clone remote git repo, initial setup with fbt, then build from source.	FLIPPER_REPO_REV, FLIPPER_REPO_BRANCH, FLIPPER_REPO_CLONE_PATH, ARM_TOOLCHAIN (all vars optional)

prebuild is default feature just for ability to build crate out-of-the-box.

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Other documentation useful for development:

• ci pipeline documentation
• build system explanation