Experimental Physics and
Industrial Control System

Dirk Zimoch <[email protected]> · Mon, 06 Oct 2008 18:07:34 +0200

Hi,

I will check if there is a bug in the implementation of %*1c. A NULL pointer for
the string is normal here because the string should be ignored. If it crashed it
seems to be a bug in my code.

Dirk

Silver wrote:
> hi, all:
> 
>   I am just trying Streamdevice driver by Franksen's suggestion. Seems it's a flexabile way of controlling our equipment. But I met some problems, the ioc will crash quickly after starting.
> our streamdevice will response 8 bytes data in hex like "55 40 04 67 39 47 be e3". in the data, "67 39 47 be" is a float's 4 bytes. other bytes are header or crc. So I write my protocol file like this:
> # example stream protocol file
> 
> #Terminator = CR LF;
> ReplyTimeout = 80000; # 10 sec is very long, for keyboard input
> ReadTimeout = 1000;   # also long for keyboard input
> 
> # note the field access
> ai { 
>     out 170 129 00 129;
>     in "%*3c%#R%*1c";   
> }
> 
> my example.db is like this:
> # process this record to reload all stream protocols
> 
> record (ai, "$(PREFIX):ai")
> {
>     field (DESC, "An analog value")
>     field (DTYP, "stream")
>     field (INP,  "@example.proto ai terminal")
> #    field (PREC, "3")
> #    field (LINR, "LINEAR")
> #    field (ESLO, "0.000305180437934") # 20.0 / 0xffff 
> #    field (EOFF, "-10")
> #    field (EGU,  "V")
>     field (SCAN, ".5 second")
> }
> 
> my example.cmd file:
> #!./streamApp
> 
> dbLoadDatabase "O.Common/streamApp.dbd"
> streamApp_registerRecordDeviceDriver
> 
> #where can protocols be located?
> epicsEnvSet "STREAM_PROTOCOL_PATH", ".:protocols:../protocols/"
> 
> #setup the busses
> 
> #example telnet style IP port setup
> drvAsynIPPortConfigure "terminal", "192.168.1.103:4001"
> #asynOctetSetInputEos "terminal",0,"\r\n"
> #asynOctetSetOutputEos "terminal",0,"\r\n"
> 
> #example VXI11 (GPIB via IP) port setup
> #vxi11Configure "GPIB","ins023",1,5.0,"hpib"
> 
> #load the records
> dbLoadRecords "example.db","PREFIX=DZ"
> #dbLoadRecords "scalcout.db","PREFIX=DZ"
> 
> #lots! of debug output
> #var streamDebug 1
> 
> #enable debug output
> var streamDebug 1
> 
> iocInit
> 
> my output of running ioc:
> 
> ~/testApp/StreamDevice-2-4/streamApp>./example.cmd
> #!./streamApp
> dbLoadDatabase "O.Common/streamApp.dbd"
> streamApp_registerRecordDeviceDriver
> #where can protocols be located?
> epicsEnvSet "STREAM_PROTOCOL_PATH", ".:protocols:../protocols/"
> #setup the busses
> #example telnet style IP port setup
> drvAsynIPPortConfigure "terminal", "192.168.1.103:4001"
> #asynOctetSetInputEos "terminal",0,"\r\n"
> #asynOctetSetOutputEos "terminal",0,"\r\n"
> #example VXI11 (GPIB via IP) port setup
> #vxi11Configure "GPIB","ins023",1,5.0,"hpib"
> #load the records
> dbLoadRecords "example.db","PREFIX=DZ"
> #dbLoadRecords "scalcout.db","PREFIX=DZ"
> #lots! of debug output
> #var streamDebug 1
> iocInit
> Starting iocInit
> ############################################################################
> ###  EPICS IOC CORE built on Sep 27 2008
> ###  EPICS R3.14.8.2 $R3-14-8-2$ $2006/01/06 15:55:13$
> ############################################################################
> iocInit: All initialization complete
> #enable debug output
> var streamDebug 1
> epics> 
> epics> dbpr DZ:ai
> ASG:                DESC: An analog value                   DISA: 0             
> DISP: 0             DISV: 1             NAME: DZ:ai         RVAL: 0             
> SEVR: NO_ALARM      STAT: NO_ALARM      SVAL: 0             TPRO: 0             
> VAL: 0.003662109375 
> epics> Segmentation fault
> :~/testApp/StreamDevice-2-4/streamApp>
> 
> Can anybody give me some hints? thanks a lot for your help.
> 
> Best regards
> Geyang  2008-10-04
> 
> 
> 

-- 
Dr. Dirk Zimoch
Paul Scherrer Institut, WBGB/006
5232 Villigen PSI, Switzerland
Phone +41 56 310 5182

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System