msp_protocol

Rust implementation of the MultiWii Serial Protocol (MSP v1 + v2).

Features

• Streaming parser (MspParser) — 1 byte → state machine → optional packet
• Serializer — build & transmit MSP v1/v2 frames
• Zero-copy payload access (decode_as<T>()) using packed_struct
• Tiny footprint (smallvec payload buffer)

Quick start

use msp_protocol::{
    helpers::{send_request, wait_for_port},
    msp::{codes::MspCommandCode, structs::MspRawImu, MspParser},
};

let mut port   = wait_for_port("/dev/ttyUSB0", 115_200, 200);
let mut parser = MspParser::from_fc();
let mut buf    = [0u8; 256];

send_request(&mut *port, MspCommandCode::MSP_RAW_IMU as u16, &[])?;

loop {
    let n = port.read(&mut buf)?;
    for &b in &buf[..n] {
        if let Ok(Some(pkt)) = parser.parse(b) {
            if pkt.cmd == MspCommandCode::MSP_RAW_IMU as u16 {
                let imu = pkt.decode_as::<MspRawImu>()?;
                println!("{imu:?}");
            }
        }
    }
}