The plan for this week was a single bar: prove the runtime-config path end to end, set one config value on a real board from the configurator and read it back. That round trip is not finished. The on-board half of it got built and verified, the leg that completes it did not, and a pile of boards got bricked and then recovered along the way.

The storage half got built

A board can now keep its configuration in flash. The hoverboard-firmware config store is a log-structured, wear-aware key/value store (settings appended as tagged records, newest wins, erase only to reclaim), tested host-side against a mock and then against a silicon oracle. Sitting on it is the first universal binary: it boots safe, detects which chip it is on, mounts the store, and runs, on real silicon of both families. Underneath, runtime-hal gained the piece this needed, a runtime-detected flash erase/program driver, bench-validated across both page-size layouts.

So the storage layer stands up, end to end, on hardware.

The round trip is unfinished

The bar needed three things standing up together: storage, the link, and the bridge. Only storage is there. The configurator-to-board path, the link protocol carrying a CONFIG_WRITE and the bridge relaying it onto the board, is not finished, so there is no value-set-from-the-web-tool-and-read-back to demo yet. The motor already spins under six-step on both chips; the configuration half is still missing its last leg.

The detour: bricked, then unbricked

A chunk of the week went to a detour: a pile of GD32F130 boards came up locked out over SWD, looking dead. They were not damaged, and an ESP32 probe that drives the reset pin brought every one back (full write-up). A side thread fell out of it too, flashing open CMSIS-DAP firmware onto a spare ST-Link clone over USB, no soldering. Maybe I will write that one up.

Where it leaves it

The storage half is done and the brick scare is behind me. The round trip is not finished: the link and the bridge are the parts still missing between a value in the on-board store and a value set from a web page.