Device Access

• Introduction to Device Access presenting basic ideas.

• Introduction to Python Device Access.

• Graphical Python Device Access using PropHelper.

• Introduction to Device Access Rights handling (user rights levels, property criticality levels, basic mechanism).

• Additional information can be found on the page Tipps für die Rufbereitschaft - Device Access

• Application Program Interfaces in C++
  • Device: Classes for client side access to accelerator devices.
  • AccData: The container class used to transport data between clients and devices.
  • Device Factory: Class to obtain references to remote device objects.
  • Alarm and Alarm Handler: Classes to create, send, receive, and filter alarms.
  • Subscription Service: Classes to read consistent data from different devices or properties when using event connections.
  • Periodical Service: Classes to read data from different devices or properties when using periodical connections.
  • Message: A class to display messages in a line of alphanumeric codes.

• Application Program Interfaces in Java
  • Device Access: Classes for client side access to accelerator devices including AccData.
  • JAPC: Java API for Parameter Control. A more abstract way to access accelerator devices.

• Application Program Interfaces in Python
  • devacc: Classes for client side access to accelerator devices.
  • devscr: A library for structured device access based on Python devacc.

• Equipment Software Interfaces
  • AccDevice: Server-side base class for devices.
  • VmeDevice: Common class for devices using VME hardware (GuPs and ECs).
  • NativeDevice: Common class for devices running under native Linux or Windows.
  • AccData: The container class used to transport data between clients and devices.
  • USRs: USR base classes and USR support library.
  • DBS: Local database access. (At present access to <devman>.dbs files.)
  • EquInf: Equipment information library. Classes for USR, device, and EC support.
  • Alarm and Alarm Handler: Classes to create, send, receive, and filter alarms.

• Common Interfaces
  • OS: Operating system independent Windows and Linux functions.

• Internally Used Modules
  • NSrvClient: Library to be used by device factory clients.
  • NSrvTCPIP: TCP/IP socket library to be used by device factory clients and name server.
  • CPU87: VME access for CPU87 GuPs.

• Servers and Applications
  • Device Manager: Internal documentation.
  • Name Server: Internal documentation, as well as layout and concepts.
  • Userface Server: Internal documentation.
  • CapLog The alarm logger.

• Design and Implementation topics.

• Home of the device access incode documentation.

• Historical (no longer available): Device access using NODAL.