• Workshop goals
• This repo
• Something about me
• Robotics competitions
• Embedded Rust 101
• Meet your robot
• Embassy
• Hello Blink
• Hello World
• Digital read
• Analog read
• PWM output
• Tasks and messages (Ping Pong)
• WIFI: list access points
• WIFI: join a network
• TCP client
• Robotic sumo
• More on async embedded rust

• giving you a taste of embedded Rust
• with concrete tasks
• learning by writing code (minimal frontal teaching)
• having fun

• bot: the robot code (code that runs on the robot)
• bot-msg: a message broker that we can use to coordinate the competition (runs on the PC)
• bot-3d: the 3d plans for the robot body

• passionate software engineer
• mostly did systems programming
• also as a JIT compiler engineer (Mono, Unity3D, V8 in the Google team)
• for me Rust is a natural choice :-)

• definitely not the RC-controlled "destroy the opponent" kind
• robots are autonomous
• hobby: relatively cheap off the shelf components
• the competition is friendly
• high educational value
• I learned Rust this way!

• say no to:
  • operating systems
  • imposed runtime environments
  • the standard library
• say yes to:
  • bare-metal programming
  • complete hardware control
  • the core library
• your code stays safe

• let's call it Froggy
• maybe you'll curse it as "Miopic Frog"...
• Raspberry PI Pico W
  • rp2040 CPU
  • a WIFI-capable "coprocessor"
• a board with:
  • a power regulator
  • two motor drivers
  • no-soldering connectors
• two IR-reflection digital distance sensors
• one IR-reflection analog "color" (BW) sensor
• two motors and two wheels
• one power back as power supply

• Embassy what?
  • an async framework for embedded Rust
• async why?
  • well... only Embassy has a driver for this WIFI chip
  • I preferred doing this workshop with "mainstream" Rust
  • I ended up loving Embassy!
• we'll see why

Let's blink a led

Let's write something over the USB wire so we can read it on our development machine (note that we do not use a debugging probe)

Let's read the status of a digital pin

Let's read the status of an analog pin

Let's generate an electrical signal that can stimulate the motor drivers so that the motors will move

Async-based cooperative multitasking, synchronizing tasks using messages

Test the WIFI hardware by listing the mearby access points

Test the WIFI hardware by connecting to a network

Connect to a TCP server and write something to it

• get back to our original goal: make these robots fight each other
• no robot will be harmed in the process
• understand robotic sumo
• have fun!
• also, understand async embedded rust by writing logging code