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

[Yun Sangwon <Sangwon.Yun@iter.org>]

Dear Tim and Nick,

 

Thank you so much.

Through using ‘$’ and ‘-S’ option, I could read/write a long string as following:

 

// 50 bytes

$ caput -S my:lso.VAL$ 12345678901234567890123456789012345678901234567890

Old : my:lso.VAL$

New : my:lso.VAL$ 12345678901234567890123456789012345678901234567890

 

$ caget -S my:lso.VAL$

my:lso.VAL$ 12345678901234567890123456789012345678901234567890                 // OK

 

For the information,

1)      In case of other usages for the long string record

$ caget my:lso

my:lso                  123456789012345678901234567890123456789

 

$ caget -S my:lso

my:lso                  123456789012345678901234567890123456789

 

$ caget my:lso.VAL

my:lso.VAL              123456789012345678901234567890123456789

 

$ caget my:lso.VAL$

my:lso.VAL$ 64 49 50 51 52 53 54 55 56 57 48 49 50 51 52 53 54 55 56 57 48 49 50 51 52 53 54 55 56 57 48 49 50 51 52 53 54 55 56 57 48 49 50 51 52 53 54 55 56 57 48 0 0 0 0 0 0 0 0 0 0 0 0 0 0

 

2)      In case of a waveform record

$ caput -S my:wave 12345678901234567890123456789012345678901234567890

Old : my:wave \003

New : my:wave 12345678901234567890123456789012345678901234567890

 

$ caget -S my:wave

my:wave 12345678901234567890123456789012345678901234567890

 

$ caget my:wave

my:wave 64 49 50 51 52 53 54 55 56 57 48 49 50 51 52 53 54 55 56 57 48 49 50 51 52 53 54 55 56 57 48 49 50 51 52 53 54 55 56 57 48 49 50 51 52 53 54 55 56 57 48 0 0 0 0 0 0 0 0 0 0 0 0 0 0

 

3)      A record of the lso record type

record (lso, "$(user):lso") {

    field (DESC, "Long String Output Test")

    field (FLNK, "$(user):lsi")

    field (SIZV, "64")

}

 

In this case, I think the waveform is easier than the lsi or lso.

Thanks again.

 

Regards,

Sangwon

 

From: Mooney, Tim M. [mailto:mooney@aps.anl.gov]
Sent: 15 September 2014 16:31
To: Yun Sangwon; 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?

 

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

---

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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