RE: Adding a second output array to an areaDetector IOC

[Iain Marcuson via Tech-talk <tech-talk at aps.anl.gov>]

As an addendum, I was able to get $(P)xprof:ArrayData updating by doing

caput $(P)xprof:EnableCallbacks 1

 

although I still have the problem of the output data collision.

 

From: Tech-talk <tech-talk-bounces at aps.anl.gov> On Behalf Of Iain Marcuson via Tech-talk
Sent: Monday, January 24, 2022 6:46 PM
To: tech-talk at aps.anl.gov
Subject: Adding a second output array to an areaDetector IOC

 

I am working on a custom areaDetector IOC and also trying to learn more of the general areaDetector architecture.  For a first test, I have tried to add some profile functionality to the IOC.

 

I have started by creating an array for the output, following the example from mythen.

 

# Create a standard arrays plugin

NDStdArraysConfigure("Image1", 3, 0, "$(PORT)", 0, 0)

dbLoadRecords("$(ADCORE)/db/NDStdArrays.template", "P=$(PREFIX),R=image1:,PORT=Image1,ADDR=0,TIMEOUT=1,NDARRAY_PORT=$(PORT),NDARRAY_ADDR=0,TYPE=Float64,FTVL=DOUBLE,NELEMENTS=$(NCHANS)")

 

# Create a standard arrays plugin for column profile

NDStdArraysConfigure("XProfile", 3, 0, "$(PORT)", 0, 0)

dbLoadRecords("$(ADCORE)/db/NDStdArrays.template", "P=$(PREFIX),R=xprof:,PORT=XProfile,ADDR=0,TIMEOUT=1,NDARRAY_PORT=$(PORT),NDARRAY_ADDR=1,TYPE=Float64,FTVL=DOUBLE,NELEMENTS=$(NCOLS)")

 

In the callback of the IOC, I create an NDArray for a column profile and populate the array.

 

When I run the IOC and start acquisition, $(P)xprof:ArrayData is undefined but of the correct size.  When I look at the image output in ImageJ, the display flickers between the full image and a one-row display of the profile data.  Some experimentation leads me to believe that the problem comes from the following lines:

 

if (arrayCallbacks) {

        /* Call the NDArray callback */

        doCallbacksGenericPointer(pImage, NDArrayData, 0);

                // And call for profile

                doCallbacksGenericPointer(pProfile, NDArrayData, 0);

    }

 

How can I get the two data separate?  Is the solution to make a profile plugin and feed the data to that?

 

Thank you,

 

Iain Marcuson

Software Engineer, Sydor Technologies

585.278.1168 | www.SydorTechnologies.com

Skype: iain.marcuson at sydorinstruments.com

 

 

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