Experimental Physics and
Industrial Control System

"Silver" <[email protected]> · Sat, 4 Oct 2008 19:31:04 +0800

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

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System