Experimental Physics and
Industrial Control System

[email protected] (Pete Jemian) · Tue, 3 Feb 98 11:44:57 CST

Marty Kraimer wrote:
> Subject: Re: proposed RTYP field
> 
> This finally got to the top of my TODO list.
> 
> There was a lot of discussion about how to implement this feature.
> The main ideas were:
> 
> 1) Provide a field RTYP in every record.
> 2) Provide a new Channel Access Request type.
> 
> I agree with the second alternative.
> 
> Jeff Hill suggested that we have a new request type DBR_CLASS_NAME.
> For example:
> 
> char        classname[80];
> 
> ...
> 
> SEVCHK(ca_get(DBR_CLASS_NAME,mychid,&classname),"ca_get");
> SEVCHK(ca_pend_io(waitTime),"ca_pend_io");
> printf("pv: %s classname %s\n",ca_name(mychid),classname);
> 
> 
> I modifyied db_access.h, db_access.c, and the ca/convert.c to implement
> the change. Jeff will still have to look to see if any other channel
> access changes are necessary if new clients talk to old servers.
> 
> Marty Kraimer
> 

Thanks for the action on the RTYP/classname topic.
I'm confused how I use this from, say, the UNIX command line
or from a SNL sequence program.

>From the UNIX command line, I can use the 
<EPICS>/extensions/bin/<arch>/caget command.
Can I figure out the RTYP/classname with this tool?

How do I figure out the RTYP from a sequence program?

These are probably silly questions but these two cases represent
the two situations that I would be using this information.
  UNIX: smart GUI tools (e.g., Tcl/Tk) that can be told how to 
        represent different record types and provide a default 
        configuration based on just the PV name
  SNL:  auto-configure program for finding all the "motor" records
        at boot time and coordinating "allstop" functions with each motor.

Thanks,
   Pete Jemian
   UNICAT

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System