The GRBL driver's stream engine and its motion envelope change
(grblHAL-glowforge: the shipper writes outside the lock, a clamp inside
an armed window faults, the X/Y soft limits follow the home, the
machine's settings are pinned, the homing keys are clamped). This commit
carries the host rules and the catalog tests that hold them; the driver
commit follows, because its CI fetches these harnesses unpinned.
scripts/bench/laser_stream_test.py:
- Rule 28: a 300 ms producer stall while armed faults the stream with
ALARM:17, the kernel sees no step burst (at most the planned steps per
100 ticks), the stream ends dark, the latch sideband ends on the lock.
The same stall unarmed is a warning: the move completes with every
step, the clamp visible as the burst the kernel counts.
- Rule 29: a 300 ms stall of the sink's write leaves the producer on
pace: no clamp, every step, lit through, dark at the end.
- The stand-in engine takes GFSINK_STALL_MS and GFSINK_WRITE_STALL_MS,
null-sink only.
scripts/bench/z_envelope_test.py:
- Rule 10: homed (a gfcloud home), a program move past X max, Y max or
the near edge alarms with ALARM:2 before any motion, a jog past the bed
is refused with error 15, a move inside the bed runs, and a $20 write
keeps the limits. The core repeats the last error for the line after a
refused jog until an empty line clears it, so the rule sends one.
forgetest/forgetest/suite/motion.py:
- motion.soft-limits (kind auto, no emission): homes through the cloud
suite's gfhome homing when the machine is not homed, then the three
refusals (ALARM:2, the kernel counters still), the refused jog, the
inside move, and the return to the corner read at rest.
- motion.deadman phase 2b: a 100 ms SIGSTOP mid-move, inside the
kernel's queue: no underrun, the controller's log warns of the clamped
late events, the move completes with every step (read at rest), the
latch stays locked. The armed clamp is proven on the host (rule 28).
forgetest/forgetest/suite/cloud.py:
- gfhome_homing drains the driver's answer to $H once the session ends:
it sits behind the status reports and passed for the reply to the
caller's next command (a setting read as None).
forgetest/forgetest/baseline.py:
- The hand-back reads the position counters at the kernel's own
microstep mode (cnc/x_mode, read before the sysfs restore puts the
settings' mode back). At the x8 constant, an x32 machine's 30 mm read
as 120 mm, beyond the return bound, and the displaced head was left in
place. The dead band scales the same way. tests/test_baseline.py holds
both.
Proof. Host: stream rules 1 to 29 and z_envelope rules 1 to 10 against
the null-sink driver, the forgetest unit tests. Bench reference:
motion.soft-limits passed (X 495 and Y 279 refused with ALARM:2 and
0.000 mm of kernel motion, X-1 the same, the jog error:15, the inside
move ran, back at the corner 0.0/0.0 mm); motion.deadman passed with
the new phase (92 late events clamped, max behind 92.3 ms, no underrun,
30.0 mm counted, latch locked) and the hand-back jogged the head back
under the x32 scale.
forgectrl f8ddb17 puts the lens frame in one place and writes the focus
window before the card's controller starts, after two commissioning
cards ended in ALARM:2 on a Z the wizard sent from one source while the
controller's Z limit stood on another. The acceptance run had passed
only because the bench's settings already held the stops from an
earlier focus run, so the run is now a fresh machine's.
commission.sheet clears the three lens settings inside its Restore
before the cards, checks that the frame runs in the fallback window,
and, after the focus card, that the settings hold the window the ladder
ran in (the stops found or the fallback), that every ladder height lies
in that window's reach, and that the program served now agrees with
/status. Every served program's Z is checked against the reach /status
reports before the card starts, so a stray Z fails the test with nothing
burned. The test covers src/lens.*. The host mock in
tests/test_commission_sheet.py mirrors the daemon (the /status lens block
from the settings, the ladder served from the settings, the window
written at the focus start); two regression tests reproduce the defects:
a focus result naming a window the settings do not hold, and a served
program with a Z beyond the reach. 10/10 green.
scripts/bench/z_envelope_test.py, the grblHAL CI harness, adds the
referenced-lens cases: with forgectrl's marker and the shared settings,
the fallback window and a 14/20 window run to the ends of their reach
and two half-steps past either end alarms, and a count of 41 falls back
on its side alone. Passed on the null-sink build. The bench page's
description of the harness follows.
The forgectrl pin moves to f8ddb17 (0.1.18); every test covering
forgectrl re-runs.
The Z soft limit belongs to the driver, not to $20. glowforge_homing.c
owns sys.work_envelope, sys.homed and sys.soft_limits for Z, because Z is
always referenced, to the lens hall edge or to where the lens stands, and
the core knows neither. The core recomputes both masks from the settings
and drops Z when it does: $20 clears the soft-limit mask inside its
setter, and a $13x write clears the homed bit for the axis as well.
z_envelope_test.py drives the null-sink controller over TCP and holds the
rule. It checks that an unreferenced Z is collapsed to where the lens
stands and refuses a move each way, that X and Y stay free so the
reassert is Z's alone, and that neither write frees Z. It restores $132.
The harness runs in the grblHAL repo's CI, next to the laser stream and
lifecycle harnesses.
ScottW514