Experimental Physics and
Industrial Control System

<[email protected]> · Tue, 24 Mar 2015 10:35:29 +0000

Hi,

This protocol looks familiar, we have written a driver for the N1470 series of NIM HV power supplies here:
http://controls.diamond.ac.uk/downloads/support/caenN1470/

Streamdevice definitely supports more that one parameter as we use it like that:
record(ao, "$(P)$(Q):VSET$(CHAN)") {
  field(DESC, "HV Setpoint")
  field(DTYP, "stream")
  field(FLNK, "$(P)$(Q):VSET$(CHAN):RBV")
  field(OUT, "@caenN1470.proto writechan($(ADDR),$(CHAN),VSET,$(P)$(Q)) $(PORT)")
  field(PREC, "1")
  field(EGU, "V")
  field(DRVH, "8000")
  field(DRVL, "0")
  field(PINI, "YES")
  field(SDIS, "$(P)$(Q):DISABLE")
}

And in the protocol file:
readchan { out "$BD:\$1,CMD:MON,CH:\$2,PAR:\$3"; in "#BD:%*d,CMD:OK,VAL:%f"; }

Do you have all your macros defined when you instantiate the template file?

Thanks,
Tom Cobb

> -----Original Message-----
> From: [email protected] [mailto:tech-talk-
> [email protected]] On Behalf Of Jörn Wüstenfeld
> Sent: 24 March 2015 10:25
> To: [email protected]
> Subject: Strange StreamDev behaviour
> 
> Hello,
> I currently have a problem with Streamdev version 2.6 and asyn 2.26
> using base
> 3.14.12.4 on an arm linux.
> 
> I have a protocol that needs two parameters:
> 
> monIMdec {
> 	out "$BD:\$1,CMD:MON,CH:\$2,PAR:IMDEC";
> 	in  "#BD:%*i,CMD:OK,VAL:%i";
> }
> 
> The corresponding database file contains the following record using
> this
> protocol:
> 
> record (ai, "xxx:monIMdec")
> {
> 	field (DESC, "readback of current resolution")
> 	field (DTYP,  "stream")
> 	field (INP,  "@CaenHVNimUsb.proto monIMdec($(ps), $(channel))
> $(interface)")
>   field (PREC, "2")
> }
> 
> Running the IOC I get the following error message during the
> initializaion
> phase:
> 
> _main_ Businterface '0)' not found for 'xxx:monIMdec'
>  _main_ xxx:monIMdec: Can't attach to bus 0) -1
>  _main_ xxx:monIMdec: Record initialization failed
> 
> If I do a "dbpr xxx:monIMdec", the value in the record is undefined.
> If I do a "dbtr xxx:monIMdec" and then a "dbpr xxx:monIMdec" the
> expected
> value is set. and no further messages are printed.
> 
> It looks to me that during initialization the parser of StreamDev does
> not
> handle more than one protocol parameter.
> What can I do to get rid of this error messages?
> 
> With kind regards,
> 
> Jörn Wüstenfeld
> 

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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System