Branchless, fixed-point (Q15) DSP primitives for FPU-less microcontrollers
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Updated
Jul 14, 2026 - C
Branchless, fixed-point (Q15) DSP primitives for FPU-less microcontrollers
Explainer site for the rk search: overview, architecture, design decisions, key findings and an in-browser Q15 demo.
Live findings site for the rk search, regenerated by the run every cycle. Deterministic, no JavaScript, never edited by hand.
Autonomous search for Runge-Kutta integrators that hold up in Q15 fixed point on a Cortex-M0+ cycle model.
Run data for the rk search: the append-only archive, event stream, hypothesis ledger, lane archives and analysis outputs. Written by the run container every cycle.
Real-time filters on an STM32G4: EMA and FIR in float and Q15, naive vs circular buffer, measured with a GPIO and a free-running timer
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