add PGM support for i21 (#1538)

* add PGM support for i21

* remove name arg as the default is the same

Co-authored-by: oliwenmandiamond <[email protected]>

---------

Co-authored-by: oliwenmandiamond <[email protected]>

Author: fajinyuan

src/dodal/beamlines/i21.py

@@ -0,0 +1,27 @@
+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.i21 import Grating
+from dodal.devices.pgm import PGM
+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("i21")
+PREFIX = BeamlinePrefix(BL, suffix="I")
+set_log_beamline(BL)
+set_utils_beamline(BL)
+
+
+@device_factory()
+def synchrotron() -> Synchrotron:
+    return Synchrotron()
+
+
+@device_factory()
+def pgm() -> PGM:
+    return PGM(
+        prefix=f"{PREFIX.beamline_prefix}-OP-PGM-01:",
+        grating=Grating,
+    )

src/dodal/devices/i21/__init__.py

@@ -0,0 +1,3 @@
+from dodal.devices.i21.enums import Grating
+
+__all__ = ["Grating"]

src/dodal/devices/i21/enums.py

@@ -0,0 +1,8 @@
+from ophyd_async.core import StrictEnum
+
+
+class Grating(StrictEnum):
+    VPG1 = "VPG1"
+    VPG2 = "VPG2"
+    VPG3 = "VPG3"
+    VPG4 = "VPG4"