Source code for ophyd_async.epics.adandor._andor_controller
import asyncio
from ophyd_async.core import (
DetectorTrigger,
TriggerInfo,
)
from ophyd_async.epics import adcore
from ._andor_io import Andor2DriverIO, Andor2TriggerMode
_MIN_DEAD_TIME = 0.1
_MAX_NUM_IMAGE = 999_999
# The deadtime of an Andor2 controller varies depending on the exact model of camera.
# Ideally we would maximize performance by dynamically retrieving the deadtime at
# runtime. See https://github.com/bluesky/ophyd-async/issues/308
[docs]
class Andor2Controller(adcore.ADBaseController[Andor2DriverIO]):
"""DetectorCobntroller for Andor2DriverIO."""
[docs]
def get_deadtime(self, exposure: float | None) -> float:
return _MIN_DEAD_TIME + (exposure or 0)
[docs]
async def prepare(self, trigger_info: TriggerInfo):
await self.set_exposure_time_and_acquire_period_if_supplied(
trigger_info.livetime
)
await asyncio.gather(
self.driver.trigger_mode.set(self._get_trigger_mode(trigger_info.trigger)),
self.driver.num_images.set(
trigger_info.total_number_of_exposures or _MAX_NUM_IMAGE
),
self.driver.image_mode.set(adcore.ADImageMode.MULTIPLE),
)
def _get_trigger_mode(self, trigger: DetectorTrigger) -> Andor2TriggerMode:
supported_trigger_types = {
DetectorTrigger.INTERNAL: Andor2TriggerMode.INTERNAL,
DetectorTrigger.EDGE_TRIGGER: Andor2TriggerMode.EXT_TRIGGER,
}
if trigger not in supported_trigger_types:
raise ValueError(
f"{self.__class__.__name__} only supports the following trigger "
f"types: {supported_trigger_types} but was asked to "
f"use {trigger}"
)
return supported_trigger_types[trigger]