This repository is a set of demonstration projects of Embedded Swift. Embedded Swift is a compilation and language mode that enables development of baremetal, embedded and standalone software in Swift. To learn more, see:
- Blog post introducing this repository
- Swift forums thread about this repository
- Discussions about Embedded Swift on the Swift forums
- Embedded Swift Vision Document
- Documentation for Embedded Swift
Each example in this repository contains build and deployment instructions, however there are a couple common steps needed for many of the examples included below:
-
Install
swiftusing the instructions here. -
Install
uv, "an extremely fast Python package and project manager", using the instructions here.
| Name | Platform | SDK | Description | Photo |
|---|---|---|---|---|
| esp32-led-blink-sdk | ESP32-C6-Bug | ESP-IDF SDK | Blink an LED repeatedly with Swift & the ESP-IDF. |  |
| esp32-led-strip-sdk | ESP32-C6-DevKitC-1 | ESP-IDF SDK | Control NeoPixel LEDs with Swift & the ESP-IDF. |  |
| esp32-uart-echo | ESP32-C6 | ESP-IDF SDK | UART echo example using Swift's print() and readLine(). |
|
| harmony | Raspberry Pi Pico W | Pico SDK | A bluetooth speaker and ferrofluidic music visualizer. Firmware, Electrical, and Mechanical designs fully available. |  |
| nrfx-blink-sdk | nRF52840-DK | Zephyr SDK | Blink an LED repeatedly with Swift & Zephyr. |  |
| nuttx-riscv-blink | QEMU | NuttX | Blink a virualized led in QEMU using the Apache NuttX RTOS | |
| rpi-4b-blink | Raspberry Pi 4B | None | Blink the Pi's status green LED repeatedly using Swift MMIO. |  |
| rpi-5-blink | Raspberry Pi 5 | None | Blink the Pi's status green LED repeatedly with Swift MMIO. |  |
| rpi-pico-blink-sdk | Raspberry Pi Pico, Pico 2 | Pico SDK | Blink an LED repeatedly with Swift & the Pico SDK. |  |
| rpi-pico-blink | Raspberry Pi Pico | None | Blink an LED repeatedly. |  |
| rpi-pico-lldb | Raspberry Pi Pico, Pico 2 | None | A tutorial project for debugging Embedded Swift with LLDB, containing bugs to find and fix. | |
| rpi-pico2-neopixel | Raspberry Pi Pico 2 | None | Control Neopixel LEDs using the RP2350 PIO. |  |
| rpi-picow-blink-sdk | Raspberry Pi Pico W, Pico 2W | Pico SDK | Blink an LED to signal 'SOS' in Morse code repeatedly with Swift & the Pico SDK. |  |
| stm32-blink | STM32F746G-DISCO | None | Blink an LED repeatedly. |  |
| stm32-lcd-logo | STM32F746G-DISCO | None | Animate the Swift Logo on the built-in LCD. |  |
| stm32-lvgl | STM32F746G-DISCO | – | Baremetal setup of LCD, touch panel, DRAM, using the LLVM Embedded toolchain for ARM. Renders graphics, animations, and reacts to user input via LVGL. Includes a macOS/Linux SDL based host simulation app. |  |
| stm32-neopixel | STM32F746G-DISCO | None | Control NeoPixel LEDs using SPI. |  |
| stm32-uart-echo | STM32F746G-DISCO | None | Echo user input using UART. |  |
Note that the SDK integration examples (Pico SDK, Zephyr SDK, etc.) are not recommendations or endorsement, the same is true for build system choice (Make, CMake, SwiftPM, shell scripts). Embedded Swift aims to be versatile and allowing integration into existing SDKs and build systems, and the example projects show some of the possibilities.
Warning
Community projects linked here are not officially supported by our team. They may not always be compatible with the latest nightly Swift toolchain builds.
| Name | Platform | Description |
|---|---|---|
| swift-matter-examples | ESP32 | An Embedded Swift Matter application running on ESP32-C6. |
| m5stack-nano-c6-bare-swift | ESP32 | A baremetal Swift project for the M5Stack NanoC6 (ESP32-C6), running without any C, assembly, or ESP-IDF — pure Embedded Swift from bootloader to LED blink |
| swift-flipperzero-hello | Flipper Zero | A demonstration of running Swift apps on the Flipper Zero. |
| EmbeddedSwift nRF52 Examples | nRF52840 (Development Kit) | A collection of examples using Embedded Swift on top of nRF Connect SDK (Zephyr). |
| Swatak | nRF52840 (Seeed Studio XIAO) | A reaction time game inspired by BATAK© boards, implemented in Embedded Swift using nRF Connect SDK. |
| swift-picosystem-example | PicoSystem | An Embedded Swift demo running on the Pimoroni PicoSystem |
| pico-bare-swift | Pico | Baremetal Raspberry Pi Pico examples in Embedded Swift — no Pico SDK required |
| CPicoSDK | Pico 2 | SwiftPM package that enables seamless Swift development for the Raspberry Pi Pico SDK |
| pico-swift-sh1106 | Pico 2 | Display Driver for SH1106 |
| swift-st7789-lcd | Pico 2 | Display Driver for ST7789 |
| PlaydateKit | Playdate | A full featured framework for building Playdate games using Embedded Swift. |
| swift-playdate-examples | Playdate | An Embedded Swift game running on Playdate by Panic. |
| swift-stm32c011-examples | STM32 | Examples of running Embedded Swift on the STM32C011, which is a tiny MCU with only 6KB of SRAM and 32KB of flash. |
| flappy-swift | Web | A WebAssembly game written in Swift in ~100 KB. |
| swift-for-wasm-examples | Web | A "Swift Audio Workstation" example built with Swift for WebAssembly running in the browser using Embedded Swift. |
| swift-embedded-pebble | Pebble | An example Pebble app for the Pebble Time 2, written in Embedded Swift. |
| swift-embedded-nds | Nintendo DS | Nintendo DS homebrew written in Embedded Swift, ported from the official devkitPro examples. |
| swift-embedded-wii | Nintendo Wii | Nintendo Wii homebrew written in Embedded Swift, ported from the official devkitPro examples. |
| swift-embedded-nintendo-64 | Nintendo 64 | Nintendo 64 homebrew written in Embedded Swift, using the original NuSys SDK and the newer and open source libdragon SDK. |
| swift-embedded-ps1 | Sony Playstation 1 | Playstation homebrew written in Embedded Swift, ported from PSn00bSDK examples. |
| Nanosaur2 | Nintendo 3DS | Pangea Software's Nanosaur 2 game ported to Nintendo 3DS using Embedded Swift. |
Please note that the presence of community repositories and devices in this list does not constitute a recommendation or endorsement. If there's a project you'd like to see included here, please submit an issue with the details.
This repository contains code that is not continuously developed, instead it's presented "as is" for educational and demonstrational purposes. Making major improvements to existing examples is discouraged, but additions of new examples is welcome.
Like all Swift.org projects, we would like these Embedded Swift example projects to foster a diverse and friendly community. We expect contributors to adhere to the Swift.org Code of Conduct.
The current code owners of this repository are Kuba Mracek (@kubamracek) and Rauhul Varma (@rauhul). You can contact them on the Swift forums via the handles @kubamracek and @rauhul.
In case of moderation issues, you can also directly contact a member of the Swift Core Team.