RE: changing unit string to scale factor

[Mark Rivers via Tech-talk <tech-talk@aps.anl.gov>]

There are a lot of useful records in that epics-modules/calc repository.

Mark


-----Original Message-----
From: Randall Cayford <rcayford@lbl.gov> 
Sent: Monday, January 25, 2021 2:38 PM
To: Mark Rivers <rivers@cars.uchicago.edu>
Subject: Re: changing unit string to scale factor

That looks like the right way to go.  It’s not in the base record types documentation so I hadn’t seen it.  Thanks!

> On Jan 25, 2021, at 12:27 PM, Mark Rivers <rivers@cars.uchicago.edu> wrote:
> 
> Look at the scalcout record:
> 
> http://htmlpreview.github.io/?https://github.com/epics-modules/calc/blob/master/documentation/sCalcoutRecord.html
> 
> Mark
> 
> 
> -----Original Message-----
> From: Tech-talk <tech-talk-bounces@aps.anl.gov> On Behalf Of Randall Cayford via Tech-talk
> Sent: Monday, January 25, 2021 2:16 PM
> To: Engbretson, Mark S. via Tech-talk <tech-talk@aps.anl.gov>
> Subject: changing unit string to scale factor
> 
> I have a device which returns a value and a string indicating the units of the value.  I’ll get inputs like 0.3nA or 3.4mA, etc.  Since I want to report the value in a consistent unit, I want to convert the unit string to a scale factor (nA=1, uA=1000, mA=10000) and then use a calc record to scale the value.   CALC records seem to only take numbers as input and I don’t see any other appropriate record type.
> 
> In programming I would use a case statement or if-elseif constructs.  How do I do this with EPICS record processing?
> 
> Randall
> LBNL
>