RE: Asyn record CNCT field does not update

[Mark Rivers via Tech-talk <tech-talk@aps.anl.gov>]

Hi Abdalla,

 

Sorry, I missed the fact that you are using UDP, not TCP.  In that case there is no permanent connection established between your driver and the device.  Each UDP read or write operation is completely independent.  Your driver will need to implement the logic which might be, for example, after 5 unsuccessful I/O attempts call pasynManager ->exceptionDisconnect() to tell asynManager that the device is disconnected.  Since you have set autoConnect=1 asynManager will periodically call the connect() method in your driver.  If your driver finds that the device is available, it then calls pasynManager->exceptionConnect().

 

Mark

 

From: Tech-talk <tech-talk-bounces@aps.anl.gov> On Behalf Of Abdalla Ahmad via Tech-talk
Sent: Tuesday, November 25, 2025 11:37 AM
To: tech-talk@aps.anl.gov
Subject: Asyn record CNCT field does not update

 

Hi

 

I developed an asynPortDriver to control a device through UDP, I want to use asynRecord CNCT field to monitor the port connection state whether the device is connected or not. The driver is configured with auto connect flag set to 1. When I monitor the field and disconnect the device, I get error message indicating IO error, but the field does not change to disconnect. I am I missing other settings to be done?

 

Best Regards, 

Abdalla.