stack-ripper

The software to run on the 'stack-ripper' High Power Rocketry avionics platforms.

The board designs can be found here.

Tech

Hardware

To help contextualise the software decisions, here is a brief overview of the current hardware choices.

The reciever (rx) has:

• an ESP32-C3 MCU,
• an SX1278-based LoRA Radio

The transmitter (tx) additionally includes:

• a u-blox NEO-M8N/MAX-M8N GNSS module,
• a custom LiPo power regulation and monitoring

The full avionics setup (av) additionally includes:

• a BMP280 altimeter,
• a BMO055 IMU,
• multiple n-MOSFET terminals for firing pyrotechnic charges,
• additional hardware lockouts preventing unwanted firings.

Software

All written in async Rust, using embassy.

Each platform (rx, tx, and av) has a seperate binary, in /src/bin/[platform].rs.

Each prehipheral is maintained in a resuable library in /src/[prehipheral].rs

Getting started

Install the prerequisites

  rustup default nightly
  rustup toolchain install nightly --component rust-src
  rustup target add riscv32imc-unknown-none-elf

Install dependencies & build

  cargo build

Install flashing utility

  cargo install espflash

Flash a device (interactive) with the rx software

  cargo build --bin rx