Experimental Physics and
Industrial Control System

Shuei YAMADA via Tech-talk <tech-talk at aps.anl.gov> · Wed, 8 Dec 2021 13:28:48 +0900

Hi Tom,

We have such a device support at J-PARC, which you can find in github:

https://github.com/shuei/epics-textfile

It supports longin, ai and waveform records, and you could write something like:

record(waveform, "TEST") {
    field(DTYP, "Text File")
    field(PINI, "YES")
    field(INP,  "@/relative/or/absolute/path/to/file")
    field(NELM, "5")
    field(FTVL, "LONG")
}

best regards,
Shuei

> Hi all,
>
> Has anyone written a support module that puts the contents of a file in a waveform record? I was going to do this in an aSub record, but it occurred to me that one of the synApps modules might contain device support for something like this.
>
> I was hoping to write something like:
>
>     record(waveform,"TEST") {
>         field(DTYP,"from_file")
>         field(INP, "/path/to/file")
>     }
>
> then be able to caget TEST and see the contents of the file.
>
> Has anyone written something like this?
>
> Thanks,
> Tom

-- 
                 ----------------------------------------------------
                 Shuei Yamada,
                 High Energy Accelerator Research Organization (KEK)
                 mailto:shuei at post.kek.jp
                 ----------------------------------------------------

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System