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Kaj SchittecatandClaude Opus 4.8
3705a66288
Diagnostic scaffolding kept from chasing the "screen flashes teal on every message" report, behind -DTDP4_FLUSH_TRACE so it is compiled out of normal builds (verified: no FLUSHTRACE string in the shipped binary). It logs any large, mostly-single-colour flush band with its RGB565 value. That answers the one question that was otherwise unanswerable from the outside: is the flash something LVGL painted, or something below it? A UI-painted flash appears as a burst of bands carrying that colour; if the screen visibly flashes and nothing logs, the cause is in the panel/DSI layer and hunting through UI widgets is wasted effort. Two notes recorded in the comment because both cost time here. One LVGL band on this board is 284x24 = 6816 px, so a size gate has to sit well below that — an earlier 8000 px threshold silently disabled the whole tracer and looked like "nothing is drawing". And the per-band uniformity scan measurably slows the flush path, so it can mask a timing-sensitive bug: any fix must be confirmed on a build with the tracer OFF. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>