Merge pull request #1273 from tongju12/pf1k4-pf-y

adding PA1K4-PF device in TMO  beamline

docs/source/upcoming_release_notes/1273-adding_pa1k4-pf_device.rst

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+1273 adding pa1k4-pf device
+#################
+
+API Breaks
+----------
+- N/A
+
+Features
+--------
+- N/A
+
+Device Updates
+--------------
+- N/A
+
+New Devices
+-----------
+- adding new device PA1K4-PF
+
+Bugfixes
+--------
+- N/A
+
+Maintenance
+-----------
+- N/A
+
+Contributors
+------------
+- tongju12

pcdsdevices/tmo_ip1.py

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+"""TMO sample calibration foil to work with spectrometer"""
+from lightpath import LightpathState
+from ophyd.device import Component as Cpt
+
+from .device import GroupDevice
+from .device import UpdateComponent as UpCpt
+from .epics_motor import BeckhoffAxis
+from .interface import BaseInterface, LightpathMixin
+from .pmps import TwinCATStatePMPS
+
+
+class CalibrationAxis(TwinCATStatePMPS):
+    """
+    Sample calibration 1D State Setup
+    Here, we specify 5 states, and 1 motor, for Y
+    axe.
+    """
+    config = UpCpt(state_count=5, motor_count=1)
+
+
+class SCaFoil(BaseInterface, GroupDevice, LightpathMixin):
+    """
+    TMO PMPS1D sample calibration class.
+    Parameters:
+    -----------
+    prefix : str
+        Base PV for the motion system
+    name : str
+        Alias for the device
+    """
+    # UI Representation
+    _icon = 'fa.minus-square'
+    tab_component_names = True
+
+    # Sample calibration Y axis
+
+    pf_state = Cpt(CalibrationAxis, ':STATE', kind='normal')
+    pf_y = Cpt(BeckhoffAxis, ':MMS:Y', doc="Y-axis of photo filter pa1k4", kind='normal')
+    removed = False
+    transmission = 1
+    SUB_STATE = 'state'
+
+    # dummy signal, state is always the same
+    lightpath_cpts = ['cali_foil.user_readback']
+
+    def calc_lightpath_state(self, **kwargs) -> LightpathState:
+        return LightpathState(
+            inserted=True,
+            removed=False,
+            output={self.output_branches[0]: 1}
+        )