Ophyd-async is a Python library for asynchronously interfacing with hardware, intended to be used as an abstraction layer that enables experiment orchestration and data acquisition code to operate above the specifics of particular devices and control systems.
| What | Where |
|---|---|
| Source | https://github.com/bluesky/ophyd-async |
| PyPI | pip install ophyd-async |
| Documentation | https://bluesky.github.io/ophyd-async |
| Releases | https://github.com/bluesky/ophyd-async/releases |
Both ophyd sync and ophyd-async are typically used with the Bluesky Run Engine for experiment orchestration and data acquisition.
The main differences from ophyd sync are:
- Asynchronous Signal access, simplifying the parallel control of multiple Signals
- Support for EPICS PVA and Tango as well as the traditional EPICS CA
- Better library support for splitting the logic from the hardware interface to avoid complex class heirarchies
It was written with the aim of implementing fly scanning in a generic and extensible way with highly customizable devices like PandABox and the Delta Tau PMAC products. Using async code makes it possible to do the "put 3 PVs in parallel, then get from another PV" logic that is common in fly scanning without the performance and complexity overhead of multiple threads.
Devices from both ophyd sync and ophyd-async can be used in the same RunEngine and even in the same scan. This allows a per-device migration where devices are reimplemented in ophyd-async one by one.
See https://bluesky.github.io/ophyd-async for more detailed documentation.
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