https://www.pistack.xyz/tags/microcontrollers/ Recent content in Microcontrollers on Pi Stack Hugo en-us Mon, 26 Oct 2026 00:00:00 +0000 https://www.pistack.xyz/posts/2026-10-26-embedded-rust-async-embassy-rtic-esp-hal/ Mon, 26 Oct 2026 00:00:00 +0000 https://www.pistack.xyz/posts/2026-10-26-embedded-rust-async-embassy-rtic-esp-hal/ <p>Firmware written with a bare superloop plus a handful of interrupt handlers has a predictable failure mode: at 40 MHz everything works, and at 400 kHz of event traffic two handlers start corrupting the same state machine. The classic fix — a real-time operating system — costs you a scheduler tick, a heap, and a debugger workflow that no longer matches the silicon. Rust&rsquo;s answer is different: keep the single stack, drop the RTOS, and get concurrency from <code>async</code> plus compile-time priority analysis.</p>