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<== Date ==> | <== Thread ==> |
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Subject: | RE: Adding a second output array to an areaDetector IOC |
From: | Iain Marcuson via Tech-talk <tech-talk at aps.anl.gov> |
To: | Mark Rivers <rivers at cars.uchicago.edu>, "tech-talk at aps.anl.gov" <tech-talk at aps.anl.gov> |
Date: | Mon, 31 Jan 2022 14:52:49 +0000 |
I didn’t change ASYN_MULTIDEVICE, but I did pass maxAddr=2. My reason for doing this was largely to learn some more EPICS internals, as opposed to a practical end. I can try out some of those suggestions. Thank you. From: Mark Rivers <rivers at cars.uchicago.edu> Did you pass the ASYN_MULTIDEVICE flag to ADDriver in your constructor, and pass maxAddr=2 rather than 1? I am not sure that is actually required since you only need 1 parameter library list, but it is a good idea. Is there a reason you are using an NDArray for your profile, rather than a simple waveform record? Using different addr fields for different NDArray meanings is implemented in a number of plugins, so I know that it works:
You could look at those for information. Mark From: Iain Marcuson <iain.marcuson at sydortechnologies.com>
I apologize for the long delay. I did try changing “addr” in the second call. That did indeed keep pImage from being overwritten. However, the data in pProfile were being overwritten. When I used an addr of 0, the pProfile data were
correct (I used fixed values for debugging.) However, when I used an addr of 1, the values coming from pProfile were very incorrect, despite having been written right before a getIntegerParam() and the
doCallbacksGenericPointer(pImage, NDArrayData, 0). I am unsure what would cause the issues I was seeing. From: Mark Rivers <rivers at cars.uchicago.edu>
Hi Iain, Before answering your question, I have 2 suggestions:
If you really do want to export an NDArray then you just need need to change "addr" in the second call to 1, because that is the addr you defined for the xprof profile. doCallbacksGenericPointer(pImage, NDArrayData, 0); // And call for profile doCallbacksGenericPointer(pProfile, NDArrayData, 1); Mark From: Tech-talk <tech-talk-bounces at aps.anl.gov> on behalf of 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 $(P)xprof:EnableCallbacks 1 although I still have the problem of the output data collision. From: Tech-talk <tech-talk-bounces at aps.anl.gov>
On Behalf Of Iain Marcuson via Tech-talk I am working on a custom areaDetector IOC and also trying to learn more of the general areaDetector architecture. For a first test, I have tried to add some profile functionality to the IOC. I have started by creating an array for the output, following the example from mythen. # Create a standard arrays plugin NDStdArraysConfigure("Image1", 3, 0, "$(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 |
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