Tiny Elixir/AtomVM demo for the Seeed XIAO-ESP32S3 that:

• Initializes a 480×320 ILI9488 over SPI (RGB666 panel, RGB888 on wire)
• Mounts an SD card (FAT), lists files, and blits the first *.RGB full-screen
• Shows a lightweight HH:MM:SS overlay
• Reads XPT2046/ADS7846 touch, draws a small cursor box, and prints a tiny x:y OSD

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Wiring

Function	XIAO-ESP32S3 pin → GPIO
SCLK	D8 → GPIO7
MISO	D9 → GPIO8
MOSI	D10 → GPIO9
TFT CS	GPIO43
Touch CS	GPIO44
TFT D/C	D2 → GPIO3
TFT RST	D1 → GPIO2
SD CS	D3 → GPIO4

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Build & Flash

# Get deps & compile
mix deps.get

# Package BEAMs into an AVM (outputs _build/atomvm/main.avm)
mix atomvm.packbeam

# Flash to ESP32-S3 (adjust port if needed)
mix atomvm.esp32.flash --port /dev/ttyACM0 --baud 115200

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.RGB images

• Raw RGB888, no header, top-left origin.
• Exact size: 480 × 320 × 3 = 460,800 bytes.
• Place on the SD card root; fallback is priv/default.rgb.