Experimental Physics and Industrial Control System
Hi Matic,
> Is there a way to specify a callback which gets called when reconnect is successful?
Yes, look at the definition of asynManager here:
https://epics.anl.gov/modules/soft/asyn/R4-34/asynDriver.html
It defines:
typedef void (*exceptionCallback)(asynUser *pasynUser,asynException exception);
and
pasynManager->exceptionCallbackAdd().
You will get a callback whenever an exception occurs. Your callback needs to test what type of exception it is. You are interested in asynExceptionConnect, and you need to call pasynManager->isConnected() to determine if it is a connect or disconnect callback.
You can look at asyn/asynRecord/asynRecord.c to see an example of using pasynManager->exceptionCallbackAdd().
> pasynManager->isConnected() seems to be always 1 for me, even after few minutes when the device is off.
That is a function of the underlying OS. For drvAsynIPPort isConnected()=No means that the OS has closed the socket. On Linux this can take quite a long time. On Windows it is faster. I assume one can change these settings by I have not tried to do that.
You should consider using the asynSetOption(port, 0, "disconnectOnReadTimeout", "Y")
This will cause the port to disconnect when there is a read timeout. If you use exceptionCallbackAdd() then you will get a callback each time a read operation to the device times out. Your callback can then try to reconnect, and if successful send the initialization string.
Mark
________________________________
From: [email protected] <[email protected]> on behalf of [email protected] <[email protected]>
Sent: Friday, October 5, 2018 3:53 AM
To: [email protected]
Subject: {ASYN} How to detect autoconnect or disconnect
Hi,
I have a device to which I must send the configuration of the data format in which I want the data to be sent to me when the connection is established otherwise all commands are ignored. Which represents a problem when a device is power-cycled and IOC keep running.
Basically, I'm between two options but none of them work for me somehow:
Autoconnect is ON: I'm not getting any data from the device as configuration was not send when reconnect happened. Is there a way to specify a callback which gets called when reconnect is successful?
Autoconnect is OFF: How to detect that device was lost to call connect() function again (and send configuration)? pasynManager->isConnected() seems to be always 1 for me, even after few minutes when the device is off.
I'm using asyn version 4-31.
Thank you,
Matic
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