BCDA-APS / 3idc-bits / 27650801955

56%

Build Type

push

github

Committed by prjemian

Commit Message

flyscan: surface real Eiger arm-failure message

The Eiger reports arm failures within ~2 ms via cam.detector_state
-> 'Error' + cam.status_message = 'Failed to arm the detector'.
Without an explicit check, the run would only fail several
seconds later in the first-frame wait, with a misleading apstools
'Path / does not exist on IOC' message from the unwinding path.

Add _check_cam_armed(det) plan stub, called immediately after
'bps.mv(det.cam.acquire, 1)' in takeoff_and_monitor.  Polls
cam.detector_state every 50 ms for up to 500 ms; on transition
to Error / Aborted / Aborting / Disconnected, reads
cam.status_message and raises RuntimeError carrying the IOC's
real failure text.  On Acquire, returns immediately so the
first-frame logic continues.  Timeout without seeing Error or
Acquire returns silently (the existing first-frame timeout
catches that case).

8 unit tests cover: armed-immediately, every error state, late
error, status_message read failure, detector_state read failure,
and timeout without error.

Coverage Stats

96 of 101 new or added lines in 2 files covered. (95.05%)

467 existing lines in 1 file now uncovered.

1221 of 2181 relevant lines covered (55.98%)

0.56 hits per line