Features
lager diagnosenow works on J-Link debug nets. Point it at adebugnet —lager diagnose <net> --box <BOX>— and it walks the whole debug-probe stack and tells you exactly what’s wrong and what to do about it: the probe isn’t on USB (cable/power/hub), the J-Link software isn’t installed on the Lager Box, the probe is held by another process or its firmware is wedged (power-cycle it), a debug server is wedged, the target board is unpowered, the target is locked by readout/IDCODE protection, the net’s device/MCU name is wrong, or the probe is fine but can’t reach the target over SWD/JTAG (wiring, reset, or speed). When a debug session is already running for the probe, diagnose reports from that session instead of interrupting it. OpenOCD/ST-Link probes get basic coverage (probe detection and debug-server state). Previouslylager diagnoseonly covered USB-TMC instruments such as power supplies, electronic loads, and scopes.