Improve IR cut GPIO detection using /proc/maps#144
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The old heuristic (output + LOW) missed IR cut pins that are HIGH in steady state. Instead, scan /proc/*/maps for userspace processes that have GPIO registers memory-mapped via /dev/mem, then report output pins from those groups that have at most 2 outputs (dedicated IR cut groups vs busy general I/O groups). Falls back to the original heuristic when no /proc/maps matches found. Fixes #143 Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
/proc/*/mapsfor userspace processes (streamers) that have GPIO registers memory-mapped via/dev/mem/proc/mapsmatches foundProblem
The old heuristic reported GPIOs that are output+LOW as IR cut candidates. On a Hi3516AV200 camera this reported GPIO 11 (wrong) and missed GPIO 63 (the actual IR cut pin, which is output+HIGH in day mode).
Verified on hardware
Tested on Hi3516AV200 with vendor streamer
robcat:possible-IR-cut-GPIO: 11(wrong)possible-IR-cut-GPIO: 63(correct, verified by physical toggle test)Test plan
Fixes #143
🤖 Generated with Claude Code