~/talk

Embedded Limbo Dancing with Wasm

on YouTube 35m
Talkat WasmCon 2024 · on Monday, 2024-11-11· at 15:00· Salt Palace | Level 3 | 355 E-F· [webassembly, embedded-and-hardware]

speakers

name:Dominik Tacke
links:none on file
name:Keith Winstein
links:none on file

resources

video:https://youtu.be/RFfZC7Skra8
slides:none on file

summary

Demonstrates compiling C to Wasm with clang targeting wasm32 then transpiling to C with wasm2c, producing a pure-C runtime that fits on tiny hardware: a simple compute module is 80 bytes, a module+runtime builds to ~2,376 bytes, and more realistic code (8‑float moving average) runs with a custom 36‑byte memory and traps safely when undersized. Claims runtime overhead drops to under 5 KB ROM and a few hundred bytes RAM, uses custom page sizes and LLX-style loadable modules, and runs on an STM32F429.

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chapters (5)

  1. 0:00Introduction
  2. 6:47Why WebAssembly fits embedded
  3. 16:13Minimal runtime demo
  4. 25:08Updating embedded modules
  5. 29:22Summary

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