This demo is designed to run on an STM32 microcontroller and some additional hardware, detailed below:

1. An STM32F746G Discovery kit
2. A 3.3V to 5V level shifter such as Texas Instrument's TXB0104 which can be found on a breakout board for easier use, such as: SparkFun Voltage-Level Translator Breakout
3. A NeoPixel WS2812 or compatible LED Strip; such as: SparkFun LED RGB Strip
4. A breadboard, such as: SparkFun Translucent Breadboard
5. A 5V power supply

Connect the components as shown in the schematic below:

We recommend including a capacitor across the LED strip power supply.

• Connect the STM32F746G-DISCO board via the ST-LINK USB port to your Mac.
• Make sure you have a recent nightly Swift toolchain that has Embedded Swift support.
• Install the stlink (https://github.com/stlink-org/stlink) command line tools, e.g. via brew install stlink.
• Build and upload the program to flash memory of the STM:

$ cd stm32-neopixel
$ export TOOLCHAINS='<toolchain-identifier>'
$ make
$ st-flash --reset write .build/release/Application.bin 0x08000000

• The LED strip should light up and slowly animate a color gradient.