Add field support - Githubissues

paulscherrerinstitute / pcaspy

Portable Channel Access Server in Python

BSD 3-Clause "New" or "Revised" License

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Add field support #55

Closed John-Holt-Tessella closed 5 years ago

John-Holt-Tessella commented 5 years ago

Some of the processes we support use the standard EPICs db field, e.g. PV.VAL. The only way in which I seem to be able to implement this in pcaspy is to create a new PV for each of the fields. At the moment I only need .DESC and .VAL but I can imagine in the future I might want '.EGU, .STAT and .SERV. Is there a better way of doing this?

xiaoqiangwang commented 5 years ago

As you said, any db fields like PVs need to be manually created. Currently that is the only way.

But if these information is only for read purpose, it is possible to serve these extra PVs implicitly. Their values are mostly present in the gddAppType_dbr_ctrl_xxx structure.

John-Holt-Tessella commented 5 years ago

OK thank you I will look at that.