v4.0.0 (2020-12-22)

API Changes

• On our EPICS motor classes, remove the ability to use setattr for
  low_limit and high_limit.
• SmarActOpenLoop: Combined scan_move_cmd and scan_pos into single EpicsSignal,
  scan_move, with separate read and write PVs.

Features

• Added pseudo motors and related calculations to the Kappa object.
• Added two methods to EpicsMotorInterface: set_high_limit() and set_low_limit(), as well as get_low_limit() and get_high_limit().
• Added a little method to clear limits: clear_limits - by EPICS convention, this sets both limits to 0.
• Added 3rd harmonic frequncy transmission info to the status print for the Attenuator.
• Added custom status print for XOffsetMirror, OffsetMirror, KBOMirror, and FFMirror.
• Add custom status print for gon classes: BaseGon, and XYZStage class.
• Add notepad signals to LaserTiming and DelayBase classes

Device Updates

• Instead of creating separated devices for Fundamental Frequency and 3rd Harmonic Frequency, we are now creating Attenuators that have both frequencies.
• EpicsMotorInterface: Add metadata to various upstream Ophyd methods to clean
  up screens generated via Typhos.
• Allow negative positions in LaserTiming and LaserTimingCompensation
  devices
• Add LED power to the Mono device.
• led metadata scalar range

New Devices

• Added ExitSlits device.

Bugfixes

• sequencer.EventSequencer.EventSequence: Add an explicit put to SEQ.PROC to
  force the event sequencer to update with the new sequence.
• Fix position handling in ReversedTimeToolDelay
• AvgSignal will no longer spam exceptions text to the terminal when the signal
  it is averaging is disconnected. This will primarily be noticed in the
  BeamStats class, loaded in every hutch-python session.

Contributors

• ZryletTC
• cristinasewell
• ghalym
• tjohnson
• zllentz