INTEGRATION OF EPICS ASYN INTO NON EPICS ENVIRONMENT PRERANA KANKIYA Brookhaven National Laboratory, New York EPICS COLLABORATION MEETING, 2014.

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INTEGRATION OF EPICS ASYN INTO NON EPICS ENVIRONMENT PRERANA KANKIYA Brookhaven National Laboratory, New York EPICS COLLABORATION MEETING, 2014

Outline Problem Statement And Proposed Solution Background on RHIC Controls RHIC and EPICS controls side by side Why ASYN is a good place to start Building blocks of the solution Resources to benefit from How to contribute to EPICS Summary

Problem Statement: Variety of hardware interfaces add complexity in control system development. Depth of knowledge required to support each form of communication leads to increase in cost of maintenance and possibility of errors. How to increase scope of supported hardware and take advantage of existing resources.

Proposed Form Of Solution: A software layer that abstracts details of difference in protocols and lets higher level code treat all interfaces alike. Other Benefits – Standardization of code. – Off-load some tasks to a common library. Possible Approaches: – Develop a software library. – Adopt existing resources such as ASYN.

RHIC ACCELERATOR COMPLEX R & D Systems Energy Recovery Linac CEC ELENS lerec ATF (EPICS???) ….

Applications Systems “adoIf” RHIC CONTROLS ARCHITECTURE USER INTERFACES (Alarms, State Machine Tools, Loggers, etc) SERVICES (Database, CNS, Reflective Server, etc) Accelerator Device Objects (ADOS) contain “parameters” DEVICE DRIVERS CONTROL EQUIPMENT Parameters ~ Records Parameter properties ~ PVs Automatically generated C++ container class.

RHIC CONTROLS ARCHITECTURE

Where to Bridge things with EPICS? Channel Access Database Sequencer Device/ Driver Support (ASYN..etc) IOC LAN CONTROL SYSTEM PROGRAMMERS USER INTERFACES (Loggers, Alarms, Archives, etc ADOS DEVICE DRIVERS CONTROL EQUIPMENT ALARMS LOGGERSARCHIVERCSS etc SERVICES DATABASE,CNS, IPCs etc

Channe l Access Datab ase Seque ncer Devic e/ Driver Suppo rt IOCIOC CACCAC ALARMALARM LANLAN CONTROL SYSTEM PROGRAMMERS CACCAC ALARMALARM CACCAC ALARMALARM CACCAC ALARMALARM USER INTERFACES (Loggers, Alarms, Archives, etc ) SERVICES (Database, CNS etc) ADOS DEVICE DRIVERS CONTROL EQUIPMENT USER INTERFACES (Loggers, Alarms, Archives, etc SERVICES (Database, CNS etc) ADOS DEVICE DRIVERS CONTROL EQUIPMENT

Why ASYN is a good place to start The two components of ASYN: – Asyn device support Integral to EPICS ecosystem and depends on DB definition files which cannot be extracted. – Asyn drivers Drivers are completely independent and have regular C style interfaces. Pros: Asyn supports a large number of devices. Cons: Not all Asyn supported devices export an Asyn driver.

Building Blocks of the solution etc USER Interface Device Driver IEEE488 ETHERNET RS232 ADOs containing generic BUS IO ASYN Containing BUS specific IO /*ADO Creates asynUser */ pasynUser = createAsynUser(); status = connectDevice(pasynUser,portname); status = canBlock(); pasynInterface = findInterface(psynUser, asynInt32Type, 1); status = queueRequest(); /* ADO interfaces with port name*/ ADO->portname->read(); ADO->portname->write(); Offloaded ADO tasks debugging reconnection errors

Our Drivers of Interest Motor Record interfaces from manufacturers such as delta tau and Newport that write drivers for ASYN. Area detector package Lakeshore 211 Temperature monitors Current source/calibrators And many more…

Your Drivers of Interest?? VME based function generator modules COTS power supplies SIS3316 a 16 channel VME digitizer of high sampling speeds. Vacuum gauge controllers a whole lot more….

Special Use Case Devices with multiple channels controlled via single IO handle eg Newport esc200 With help of ASYN’s multi user support its easier to create multiple IO handles on the same “port” like resource. The ASYN library takes care of locking mechanisms.

Summary There are clearly benefits of EPICS we can take advantage of and there are multiple places we can bridge to EPICS. ASYN gives us advantages with minimal EPICS specific dependencies. Our driver repository could potentially become relevant to EPICS users. ASYN alone does not serve the purpose of a homogenous layer solution.

T HANK YOU ! Q UESTIONS ?