Experimental Physics and Industrial Control System
> > I note there are no NDArrayCallbacks.
>
> Please explain exactly what you mean by that statement. What are you
> observing?
>
> - Is your driver calling doCallbacksGenericPointer()?
The code is based on Mythen, and looks like:
getIntegerParam(NDArrayCallbacks, &arrayCallbacks);
if (arrayCallbacks) {
this->unlock();
doCallbacksGenericPointer(pImage, NDArrayData, 0);
this->lock();
}
I put some printf()s to trace the flow and found that the if statement doesn't evaluate to true
>
> - Are ArrayCallbacks enabled in your driver?
>
> - Is the NDPluginStdArrays plugin enabled (EnableCallbacks)? Is it configured
> to get its data from your driver? Are the TimeStamp_RBV and UniqueId_RBV
> records in NDPluginStdArrays updating?
>
I set $(P)$(R)ArrayCallbacks and $(P)$(R)EnableCallbacks to Enable and verified that with caget. TimeStamp_RBV and UniqueId_RBV do not update.
> > When I look at $(P)$(R)ArrayData, it appears to be all zeroes except the
> first value
>
> How are you looking at $(P)$(R)ArrayData, i.e. with what tool?
>
I am using caget -# 100 $(P)$(R)ArrayData.
> -----Original Message-----
> From: Mark Rivers [mailto:[email protected]]
> Sent: Wednesday, May 03, 2017 9:52 PM
> To: Iain Marcuson <[email protected]>; tech-
> [email protected] >> EPICS Tech Talk <[email protected]>
> Subject: RE: EPICS PV for data in Area Detector
>
> Hi Iain,
>
> Some questions:
>
> > I note there are no NDArrayCallbacks.
>
> Please explain exactly what you mean by that statement. What are you
> observing?
>
> - Is your driver calling doCallbacksGenericPointer()?
>
> - Are ArrayCallbacks enabled in your driver?
>
> - Is the NDPluginStdArrays plugin enabled (EnableCallbacks)? Is it configured
> to get its data from your driver? Are the TimeStamp_RBV and UniqueId_RBV
> records in NDPluginStdArrays updating?
>
> > When I look at $(P)$(R)ArrayData, it appears to be all zeroes except the
> first value
>
> How are you looking at $(P)$(R)ArrayData, i.e. with what tool?
>
> Mark
>
>
> ________________________________________
> From: [email protected] [[email protected]] on
> behalf of Iain Marcuson [[email protected]]
> Sent: Wednesday, May 03, 2017 3:43 PM
> To: [email protected] >> EPICS Tech Talk
> Subject: EPICS PV for data in Area Detector
>
> I am trying to transfer pixel values from an Area Detector driver's private
> variable into an NDArray for viewing with ImageJ. I have verified that the
> ImageJ plugin works. I have also verified that the test data are generated
> correctly. My code follows that of the Mythen driver, except with two
> dimensions instead of one. I alloc() an NDArray and copy the pixel values
> over. I have verified that the pixel values are transferred correctly to the
> pImage. I note there are no NDArrayCallbacks. When I look at
> $(P)$(R)ArrayData, it appears to be all zeroes except the first value, which
> appears to increment on both acquisition and "caget $(P)$(R)ArrayData".
> What might I be missing?
>
> Thank you,
>
> Iain.
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