AtomGL Example

A tiny Elixir/AtomVM demo that renders something simple on an SPI LCD using:

• atomvm/atomgl
• atomvm/avm_scene
• Supported displays
• Target board: Piyopiyo PCB with Seeed XIAO-ESP32S3

Wiring

Function	XIAO-ESP32S3 pin	ESP32-S3 GPIO
SCLK	D8	7
MISO	D9	8
MOSI	D10	9
LCD CS	—	43
LCD D/C	D2	3
LCD RST	D1	2

Build & Flash

Build a custom AtomVM image with AtomGL and flash it to the device:

bash scripts/atomvm-esp32.sh build-erase-flash --port /dev/ttyACM0 --target esp32s3

Flash this Elixir app to the device:

mix deps.get
mix do clean + atomvm.esp32.flash --port /dev/ttyACM0

Monitor the device in another terminal:

bash scripts/atomvm-esp32.sh monitor --port /dev/ttyACM0