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Custom chips overview

When the part you need isn’t in the catalog, you can build it yourself. A custom chip is a small program (compiled to WebAssembly) that defines your component’s pins and behavior: it can drive and read GPIOs, speak I2C, SPI or UART, expose attributes to the properties panel, and even draw to a framebuffer.

In this section:

  • Getting started — create your first custom chip from the editor.
  • Programmable sensors — live sliders that drive your chip while the simulation runs (controls in chip.json).
  • My Chips — save a chip once, reuse it in any project (Pro).
  • API reference — every function in velxio-chip.h: GPIO, I2C, SPI, UART, time, attributes and framebuffer.