Rotary encoder as scroll wheel

Wiring diagram

┌─────────────────┐          ┌────────────────┐
│     RP2040      │          │     Rotary     │
│                 │          │     Encoder    │
│          GPIO8  ├─────────►│ A              │
│                 │          │                │
│          GPIO9  ├─────────►│ GND            │
│                 │          │                │
│         GPIO10  ├─────────►│ B              │
│                 │          │                │
└─────────────────┘          └────────────────┘

Installation

Download latest firmware build from Releases page
Hold the BOOTSEL button while connecting your board to the computer
Copy firmware file downloaded earlier to the RPi-RP2 disk
Enjoy

Building firmware

Install rustup by following the instructions at https://rustup.rs
Install Cortex-M0, M0+, and M1 (ARMv6-M architecture) target: rustup target add thumbv6m-none-eabi
Install LLVM tools: rustup component add llvm-tools-preview
Install cargo-binutils: cargo install cargo-binutils (Note: on some Linux distros (e.g. Ubuntu) you may need to install the packages build-essential, gcc-arm-none-eabi, libssl-dev and pkg-config prior to installing cargo-binutils)
Install elf2uf2: cargo install elf2uf2-rs
Clone this repo: git clone git@github.com:dotcypress/scrolly.git && cd scrolly
Hold the BOOTSEL button while connecting your board to the computer
Flash microcontroller: cargo run --release

License

Licensed under either of

Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.

dotcypress / scrolly