add support for i16 DCM - there are PVs still missing in EPICS

src/dodal/beamlines/i16.py

@@ -0,0 +1,25 @@
+from dodal.common.beamlines.beamline_utils import device_factory
+from dodal.common.beamlines.beamline_utils import set_beamline as set_utils_beamline
+from dodal.devices.i16.dcm import DCM
+from dodal.devices.synchrotron import Synchrotron
+from dodal.log import set_beamline as set_log_beamline
+from dodal.utils import BeamlinePrefix, get_beamline_name
+
+BL = get_beamline_name("i16")
+PREFIX = BeamlinePrefix(BL, suffix="I")
+set_log_beamline(BL)
+set_utils_beamline(BL)
+
+
+@device_factory()
+def synchrotron() -> Synchrotron:
+    return Synchrotron()
+
+
+# dodal connect should work again after this https://jira.diamond.ac.uk/browse/I16-960
+@device_factory()
+def dcm() -> DCM:
+    return DCM(
+        temperature_prefix=f"{PREFIX.beamline_prefix}-OP-DCM-01:",
+        prefix=f"{PREFIX.beamline_prefix}-OP-DCM-01:",
+    )

src/dodal/devices/i16/dcm.py

@@ -0,0 +1,50 @@
+from ophyd_async.epics.core import epics_signal_r, epics_signal_w
+from ophyd_async.epics.motor import Motor
+
+from dodal.devices.common_dcm import BaseDCM, PitchAndRollCrystal, RollCrystal
+
+
+class DCM(BaseDCM[RollCrystal, PitchAndRollCrystal]):
+    """
+    A double crystal monochromator (DCM), used to select the energy of the beam.
+
+    perp describes the gap between the 2 DCM crystals which has to change as you alter
+    the angle to select the requested energy.
+
+    offset ensures that the beam exits the DCM at the same point, regardless of energy.
+    """
+
+    def __init__(
+        self,
+        temperature_prefix: str,
+        prefix: str,
+        name: str = "",
+    ) -> None:
+        with self.add_children_as_readables():
+            # Positionable Parameters
+            self.perp = Motor(prefix + "XTAL2:YPRIME")
+            self.crystal_1_roll = Motor(prefix + "XTAL1:ROLL")
+            self.crystal_2_roll = Motor(prefix + "XTAL2:ROLL")
+            self.crystal_2_pitch = Motor(prefix + "XTAL2:PITCH")
+            self.crystal_2_fine_pitch_read = epics_signal_r(
+                float, prefix + "FPMTR:PREAD"
+            )
+            self.crystal_2_fine_pitch_write = epics_signal_w(
+                float, prefix + "FPMTR:POUT"
+            )
+            self.crystal_2_fine_roll_read = epics_signal_r(
+                float, prefix + "FRMTR:PREAD"
+            )
+            self.crystal_2_fine_roll_write = epics_signal_w(
+                float, prefix + "FRMTR:POUT"
+            )
+
+            # Temperatures
+            self.crystal_1_temp1 = epics_signal_r(float, temperature_prefix + "TMP1")
+            self.crystal_2_temp2 = epics_signal_r(float, temperature_prefix + "TMP2")
+            self.crystal_1_temp3 = epics_signal_r(float, temperature_prefix + "TMP3")
+            self.crystal_2_temp4 = epics_signal_r(float, temperature_prefix + "TMP4")
+            self.crystal_1_temp5 = epics_signal_r(float, temperature_prefix + "TMP5")
+            self.crystal_2_temp6 = epics_signal_r(float, temperature_prefix + "TMP6")
+
+        super().__init__(prefix, RollCrystal, PitchAndRollCrystal, name)