RE: Does the record type lsi support a long string longer than 40 bytes?

["Mooney, Tim M." <mooney@aps.anl.gov>]

You have to append '$' to the PV name of a long string, so everybody knows to treat it as an array of characters.

Tim Mooney (mooney@aps.anl.gov) (630)252-5417
Software Services Group (www.aps.anl.gov)
Advanced Photon Source, Argonne National Lab

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From: tech-talk-bounces@aps.anl.gov [tech-talk-bounces@aps.anl.gov] on behalf of Yun Sangwon [Sangwon.Yun@iter.org]
Sent: Monday, September 15, 2014 8:55 AM
To: nick.rees@diamond.ac.uk; tech-talk@aps.anl.gov
Subject: RE: Does the record type lsi support a long string longer than 40 bytes?

Dear Nick,

 

Thanks for your kind reply.

For your information, in my case the result of caput with –S option for a lso record is same as below:

$ caput -S my:lso 12345

Old : myt:lso                 

New : my:lso

 

$ caget -S my:lso

my:lso                 

 

Regards,

Sangwon

 

From: nick.rees@diamond.ac.uk [mailto:nick.rees@diamond.ac.uk]
Sent: 15 September 2014 14:52
To: Yun Sangwon; tech-talk@aps.anl.gov
Subject: RE: Does the record type lsi support a long string longer than 40 bytes?

 

Hi Sangwon,

 

I think you need the –S option, not the –a option to caput. caput –h describes the –S option as:

 

  -S: Put string as an array of char (long string)

 

Cheers,

 

Nick Rees

Principal Software Engineer           Phone: +44 (0)1235-778430

Diamond Light Source                  Fax:   +44 (0)1235-446713

 

From: Yun Sangwon [mailto:Sangwon.Yun@iter.org]
Sent: 15 September 2014 12:59
To: tech-talk@aps.anl.gov
Subject: Does the record type lsi support a long string longer than 40 bytes?

 

Dear All,

 

I understand new record types such as printf, lsi and lso are added in EPICS v3.15.

So, I’m considering to use the record type lsi (long string input) to store a string value longer than 40 bytes.

But in my test case, it seems that maximum length supported by lsi is 40 bytes including ‘\0’ as the string record type.

 

$ caput my:lsiout 12345678901234567890123456789012345678901234567890

Old : my:lsiout              

New : my:lsiout               123456789012345678901234567890123456789

 

$ caput -a my:lsiout 3 1 2 3

Old : my:lsiout               

New : my:lsiout              

 

Does the record type lsi support a long string longer than 40 bytes?

If so, how can I read and write a long string value to a lsi record?

If not, could anyone let me know the difference between lsi and stringin and any suggestion for my purpose?

 

Thanks in advance.

Sangwon

 

 

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