Experimental Physics and
Industrial Control System

Use StreamDevice.

________________________________________
Von: [email protected] [[email protected]]" im Auftrag von "Gofron, Kazimierz [[email protected]]
Gesendet: Freitag, 13. Mai 2016 04:23
An: [email protected]
Betreff: long string command to device

Hi,

I am writing EPICS driver for Keithley 3706A, and am trying to figure out how to send long string commands to the 3706A.
The ICL commands have no short version, and some commands exceed current 40 char length limit of the stringout record.

____
The EPICS stringoutRecord.h is limited to 40 char.
char            val[40];        /* Current Value */
****

In my driver assigning to stringout:
"dmm.setconfig('1019:1020','fourwireohms')"
results in "dmm.setconfig('1019:1020','fourwireohms" being send - missing last 2 characters

Is there a replacement for stringout with relaxed limit?
----------------
Simplified command/respond test:

record(stringout, "$(P)$(Dmm)command") {
  field(FLNK, "$(P)$(Dmm)reply")
}

record(stringin, "$(P)$(Dmm)reply") {
  field(DTYP, "asynOctetWriteRead")
  field(INP, "@asyn($(PORT) 0) $(P)$(Dmm)command")
}
------------------
I am currently using this format in the driver:

record(stringout, "$(P)$(Dmm)dmm_read") {
  field(DTYP, "asyn so stringParm")
  field(FLNK, "$(P)$(Dmm)dmm_get_str.VAL  PP MS")
  field(VAL, "print(dmm.measure())")
  field(OUT, "@asyn($(PORT))TERM=0a")
}

record(stringin, "$(P)$(Dmm)dmm_get_str") {
  field(DTYP, "asyn si stringParm")
  field(INP, "@asyn($(PORT))TERM=0a,TO=10000")
  field(FLNK, "$(P)$(Dmm)read_finished.VAL  PP MS")
}

Kazimierz

References:

long string command to device Gofron, Kazimierz

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