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Device/Driver Support for Network Based Devices

This presentation discusses the need for a modular approach to implementing device/driver support for network-based devices in EPICS. The presentation covers the basic idea, the shared Message Passing Facility, and the supported devices. The text language is English.

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Device/Driver Support for Network Based Devices

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  1. Device/Driver Support for Network Based Devices EPICS　Collaboration Meeting Jun, 2003

  2. Backgrounds & Basic Idea • Many PLCs and device controllers comes equipped with an Ethernet interface. • It is inefficient to implement device/driver support modules for each of those devices independently. • The most complex part, Message Passing Facility, can be shared. • What to send depends on the company proprietary protocols, but how to send does not.

  3. To Be Supported Soon

  4. Modular Structure Record Support FA-M3 MELSEC CVM1 … Device Support Library Network IO Driver

  5. Loading Modules for Each -> ld < drvNetMpf.o -> ld < devNetDev.o -> ld < devMelPlc.o -> ld < devYewPlc.o -> ld < devOmrPlc.o -> ld < devNDim.o

  6. Device Dependent Module • Implements only 3 functions: • Link Field Parser • Command Constructor • Response Parser • Fairly easy to implement ! • Portable • Some of the modules has been ported onto 3.14 on Linux together with the common driver

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