Experimental Physics and
Industrial Control System

"Gofron, Kazimierz" <[email protected]> · Fri, 13 May 2016 02:23:51 +0000

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

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System