imrishabh18/rp2040-motor-controller

routing/README.md

# Fixed PCB routing

`route-plan.json` stores the complete four-layer NEMA 17 routing solution and the exact input geometry, connectivity and design rules used to validate it. `saved-routing.ts` supplies this geometry through tscircuit's local `algorithmFn` interface. Core recreates copper, vias and pours and performs its normal checks.

The whole board, including the RP2040 group and four grounded mounting rings, is routed together. Pipeline 7 produced the initial topology. Its power/signal expansion phases widened the copper; local geometry corrections removed a reset/signal crossing and a gate-pad clearance violation. A missing layer transition was represented by a physical through via. The motor header uses a round pin-1 pad to avoid a rotated rectangular-pad inconsistency between pour generation and Gerber export.

The saved plan rejects input changes. After changing placement, nets, footprints or routing rules, regenerate and validate the routes; do not merely replace `expectedInput`. Run `bun run verify` and inspect the placement/short-check reports before sharing fabrication files. See `../verification.md` for the exact checked artifact.