Re: Asyn: disconnect and reconnect port via PV

[Bruno Martins <brunoseivam@gmail.com>]

Maybe you can use asynRecord's CNCT field:

https://epics.anl.gov/modules/soft/asyn/R4-33/asynRecord.html

dbLoadRecords("../../db/asynRecord.db","P=asyn,R=Record,PORT=device_port,ADDR=0,OMAX=0,IMAX=0")

Bruno

On Fri, Aug 31, 2018 at 2:30 AM Niedermayer, Philipp <p.niedermayer@fz-juelich.de> wrote:

Hello everyone,

 

I have implemented a soft IOC that communicates to a spectrum analyzer via asyn and stream device using vxi11:

 

vxi11Configure("device_port","$(DEVICE_IP)",0,"0.0","inst0",0,0)

 

The device has a limitation that it can only be controlled by one remote controller at a time. The current approach is to temporarily stop the entire soft IOC when required and then restart it via the st.cmd file.

 

It would be better to have a PV (e.g. a bo with CONNECTED/DISCONNECTED state) for this task, that can dis- and reconnect the asyn port.

I know that you can disable record processing by the DISA field, but that did not prevent asyn to keep up a connection to the device in background.

I found the “asynManager” which has the promising “connectDevice” and “disconnect” option, but I’m not sure how to (if at all) call them from the PV.

 

Is there a way to have such a PV? How could that be implemented?

 

Greetings and tanks in advance

Philipp

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