Experimental Physics and
Industrial Control System

Ned Arnold <[email protected]> · Tue, 06 Jul 2004 08:13:51 -0500

The latest version of save/restore (the ioc-based utility that
initializes field values from a file prior to iocInit) supports
waveforms. One could use any CA utility (matlab?) to initialize a
waveform record ONCE and then the value would be restored after each
reboot.
This was added last spring. Contact Tim Mooney ([email protected]) for
details.
 Ned

Gasper Pajor wrote:

Hello Mark, Steve
We came across the same problem - filling the waveform with static data
- and the best solution we found so far is the use of state notation
language.
Here is an example code for what we do :
double arr[100];
assign arr to "CURVES:SINE";
%% int i;
......

......

state init

{

when()

{ 
           %%  for(i=0;i<100;i++) arr[i] = sin(0.1*i);
           %%  j=0;
           pvPut(arr);
         } state somethingelse
      }
......
......
We use sequencer and 2.0.8 and epics base 3.14.x.
Hope this helps,
Gasper Pajor,
Cosylab

Singleton, SJ (Steve) wrote:
Hello Mark
I use EPICS subroutine (SUB) records to initialise waveform records, with

the attached code. Because of the limitation on the number of
arguments to

a SUB record it is only possible to initialise up to nine elements of the

array from one SUB record. The arguments of the SUB record are as
follows:
INPA - the waveform record

INPB - the index number of the first waveform element to be set up by
this

SUB record.

INPC - the number of elements to be initialised by the SUB record, in the

range 1 - 9.

INPD to INPL - the values to which the elements are to be set.
Hope this helps.
Regards
Steve Singleton

-----Original Message-----
From: [email protected]
[mailto:[email protected]]On Behalf Of Mark M. Ito
Sent: 04 July 2004 02:14
To: [email protected]
Subject: initializing a waveform record

What is there a standard way to initialize the values of a waveform
record?
I saw Andrei Liyu's post from this past Apr. 8. He seems to imply that
the standard is to call dbPutField. Does one write a VxWorks
subroutine to make this call and load the array?
The array is of floats, and will be about 100 elements long. The
values are static; they never change.
I also looked at the waveform record description in the Record
Reference Manual. That did not help me given my lack of basic
understanding of this stuff.
I also skimmed the contents of the Application Developer's Guide. No
help for me there either.

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System