Rustberry Pi - Baby steps in embedded Rust

# .title[Rustberry Pi]

[lislis](https://lislis.de)  at [Rust Meetup Rostock](https://www.meetup.com/altow-academy/events/lftnvsydclbmb/) August 2022

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# $ whoami

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# $ whoami

Creative Technologist

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# $ whoami

Creative Technologist

Around Rust since 2017

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# $ whoami

Creative Technologist

Around Rust since 2017

Organized [Rust in Arts](https://www.youtube.com/watch?v=hwaBaoAPOU0&list=PL85XCvVPmGQgF1UzXWnQHKtsPHmw6tEXx)<br> in November 2021

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# Embedded who dis?

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on a .subtle[wide variety of devices].

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From microcontrollers

to single board computers

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From microcontrollers

to single board computers

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From microcontrollers

to single board computers

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From microcontrollers

to single board computers

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## You need some kind of hardware

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## Use what you have

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## I have

- little experience in bare metal programming (like toying with Arduinos)

- no idea what I'm doing

- a rough idea of what I want

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What do I want?

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# Physical computing

Reading from and interacting with the physical world

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## Prep work

- Develop on device

- Flash Raspbian OS onto an SD card and boot your Raspy
        - Use the GUI or ssh to install Rust (with rustup, just like you're used to)
        - [Video tutorial on how to do these things](https://www.youtube.com/watch?v=MMzCfzCUNyo)

- or cross-compile
        - add ARM target (`rustup target add armv7-unknown-linux-gnueabihf`)
        - [Article on how to do that and set up a deployment script](https://medium.com/swlh/compiling-rust-for-raspberry-pi-arm-922b55dbb050)

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Step 1

## Hello blinky World

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## Building a circuit for the blinking light!

We need:

- Jumper cables

- LED

- Resistor (eg 330 Ohm)

- Breadboard

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## Building a circuit for the blinking light!

- Connect 5V and GND on your breadboard

- Connect the long leg of the LED to GPIO 23 (physical pin 16)

- Connect the short leg to GND using the resistor

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Run it!

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Step 2

## Hello touchy World

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## Building a circuit for the touch sensor

- Connect 5V and GND on your breadboard

- The touch sensor module has three pins

- Connect VCC and GND to your breadboard accordingly

- Connect Out to GPIO 24 (physical pin 18)

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Look at the code and run it!

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Step 3

## Hello moving World

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## Servos and PWM

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## Building a circuit for a servo motor

- Connect 5V and GND on your breadboard

- The servo motor has three pins

- Connect VCC (red) and GND (brown) to your breadboard accordingly <br> .small[(ideally motors are powered by a seperate power supply as they draw a lot of current. But we'll ignore that for now 🙃)]

- Connect the Pulse (orange) to GPIO 18 (physical pin 12) <br> .small[(and make sure that your Pi has [pwm enabled](https://docs.golemparts.com/rppal/0.12.0/rppal/pwm/index.html#pwm-channels))]

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Look at the code and run it!

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## Bring everything together!

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