Experimental Physics and
Industrial Control System

Jörn Wüstenfeld <[email protected]> · Mon, 18 Apr 2016 08:39:22 +0200

Hello,

I'm trying to setup an areaDetector IOC for reading a Basler camera. The 
basics are working, but I have problems to setup the file writing.
Regardless of what way I use (CSS/BOY or caput) I get an exception if I try to 
setup any of the Filename related PV's (FilePath, FileName, FileTemplate).
In NDFile.template they are defined as waveform records while BOY interpretes 
them as STRING.

If I do:

--> cainfo areaDetector:HDF1:FilePath
areaDetector:HDF1:FilePath
    State:            connected
    Host:             x.x.x.x:5064
    Access:           read, write
    Native data type: DBF_CHAR
    Request type:     DBR_CHAR
    Element count:    256

If I try to set the variable to some path:

caput areaDetector:HDF1:FilePath "/home/<some user>"
Old : areaDetector:HDF1:FilePath 256 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 
0
CA.Client.Exception...............................................
    Warning: "Channel write request failed"
    Context: "op=1, channel=areaDetector:HDF1:FilePath, type=DBR_STRING, 
count=1, ctx="areaDetector:HDF1:FilePath""
    Source File: ../oldChannelNotify.cpp line 160
    Current Time: Mon Apr 18 2016 08:18:01.581943010
..................................................................                                                                
New : areaDetector:HDF1:FilePath 256 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 
0

Only if I use caput -S ... I can successfully set the variable.

In CSS I get the following message:

2016-04-18 08:15:44 ERROR: Failed to write value to PV 
areaDetector:HDF1:FilePath from widget Text Input.
Illegal input : /home/<some user> 
java.lang.ArrayIndexOutOfBoundsException: 0

How to force BOY to send the string as an array of chars?

Regards
Jörn

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System