Experimental Physics and
Industrial Control System

Hi Marco,

 

1 - Can i instantiate my asynPort inside the cpp code to avoid using drvAsynIPPortConfigure?

 

Yes, you can simply call drvAsynIPPortConfigure() from your cpp code.  drvAsynIPPortConfigure is both a C callable function and an iocsh command.  The C callable function drvAsynIPPortConfigure is defined in drvAsynIPPort.h.  Here is an example of calling drvAsynIPPortConfigure() from within C++ code:

https://github.com/epics-modules/quadEM/blob/226441817aa2a8345c344db4ede24c564e776cf5/quadEMApp/src/drvNSLS_EM.cpp#L213

 

However, in general I prefer to create the port in the st.cmd file.  That way you can easily enable asynTrace in your st.cmd file to see the communication to the device.

2 - How can i write/read to the connected port?

 

You first need to call pasynOctetSyncIO->connect() to connect an asynUser structure to the port you created above.  You do this using the name of the port you passed to drvAsynIPPortConfigure.  It does not matter if you created that port in the st.cmd file or in your C++ code.  Here is an example from the same driver above:

https://github.com/epics-modules/quadEM/blob/226441817aa2a8345c344db4ede24c564e776cf5/quadEMApp/src/drvNSLS_EM.cpp#L222

 

You tried to do this, but you passed &pasynUserSelf.  That won’t work,  pasynUserSelf is the asynUser for your asynPortDriver object.  You need to allocate a new asynUser structure and pass that.  In this example that pasynUser is a private class variable:

https://github.com/epics-modules/quadEM/blob/226441817aa2a8345c344db4ede24c564e776cf5/quadEMApp/src/drvNSLS_EM.h#L53

 

You then call pasynOctetSyncIO->write()

https://github.com/epics-modules/quadEM/blob/226441817aa2a8345c344db4ede24c564e776cf5/quadEMApp/src/drvNSLS_EM.cpp#L273

 

or  pasynOctetSyncIO->writeRead()

https://github.com/epics-modules/quadEM/blob/226441817aa2a8345c344db4ede24c564e776cf5/quadEMApp/src/drvNSLS_EM.cpp#L276

 

3 - Is there a minimal working example which i can follow?

 

The example above is this:

https://github.com/epics-modules/quadEM/blob/master/quadEMApp/src/drvNSLS_EM.cpp

 

There are several areaDetector drivers that do exactly what you are doing, make a simple socket connection to a vendor server.

 

ADPilatus talks to the Dectris camserver.  It calls drvAsynIPPortConfigure in the st.cmd

https://github.com/areaDetector/ADPilatus/blob/master/pilatusApp/src/pilatusDetector.cpp

 

ADmarCCD talks to the Rayonix server.  It calls drvAsynIPPortConfigure in the st.cmd

https://github.com/areaDetector/ADmarCCD/blob/master/marCCDApp/src/marCCD.cpp

 

Search for “pasynOctetSyncIO” in both of those drivers.

 

Mark

 

 

 

 

 

Aviso Legal: Esta mensagem e seus anexos podem conter informações confidenciais e/ou de uso restrito. Observe atentamente seu conteúdo e considere eventual consulta ao remetente antes de copiá-la, divulgá-la ou distribuí-la. Se você recebeu esta mensagem por engano, por favor avise o remetente e apague-a imediatamente.

Disclaimer: This email and its attachments may contain confidential and/or privileged information. Observe its content carefully and consider possible querying to the sender before copying, disclosing or distributing it. If you have received this email by mistake, please notify the sender and delete it immediately.