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ScottW514
765521455d
accel_crash_probe.py arms the head LIS2HH12's on-chip interrupt generator (IG_CFG1/IG_THS/IG_DUR1) and polls the latched IG_SRC1 for a strike, reporting the axes and raw magnitude. It settles the bench fact the crash detector rides on: coexist mode reaches the IG registers over i2c-dev with I2C_SLAVE_FORCE while st_accel stays bound, so it proves whether the detector can be forgectrl-only with the liveness path untouched, or whether the accel must move under glowforge.ko. It touches only the IG registers (0x30-0x35) plus the CTRL7 latch bit, never the full scale, so st_accel's raw scaling is undisturbed; no emission, no commanded motion by default. Registered on the bench page (dry, board) and in the bench README. BRINGUP item 6 now stages the drill as the committed first step, with the readout path, per-state thresholds and the two-tier wiring owed after it. Tooling only: no shipped component source changed, so no acceptance-catalog consequence (the detector feature gets its case when it is built); the bench registry test and coverage lint pass.