Experimental Physics and
Industrial Control System

Andrew Johnson <[email protected]> · Thu, 23 Aug 2012 17:06:55 -0500

Hi Dehong,

On 2012-08-23 Zhang, Dehong wrote:
> 
> Is it possible to create these things dynamically inside a record, so that
> I can access PVs on another IOC, without listing them all in the dbd file
> of my custom record?
> 
> In other words, is there something like the
> dbNameToAddr
> to use for creating and accessing LINKs?

Anything is possible if you're willing to write enough code, but...

The dbNameToAddr() routine is only for local PVs; CA links are implemented 
using the code in dbCa, and initializing those links happens at iocInit() or 
whenever the INP/OUT link value is changed.  However there isn't really a 
public API for that kind of thing, and I don't really recommend that you try 
to do that.

It sounds to me like you're creating a new record type when maybe you should 
be writing a State Notation Language program.  Why don't you step back a bit 
and reconsider what you're trying to do?  Feel free to explain here if you 
want more advice, but you will need to explain the bigger picture because I 
wouldn't recommend trying what you describe above.

HTH,

- Andrew
-- 
Never interrupt your enemy when he is making a mistake.
-- Napoleon Bonaparte

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System