Experimental Physics and
Industrial Control System

Kate Feng <[email protected]> · Thu, 16 May 2013 14:14:08 -0400

Hi,

   I am using the asynDriver R4-21 to run Mark River's areaDetectorR1-9-1

software on a Prosilica (i.e. Allied) GigE camera. Everything works

very well

except when the camera becomes offline (e.g. the Ethernet cable for the

Prosilica GigE camera is disconnected). Thankfully, the medm screen

indicated

the "disconnect" status when the Ethernet cable for the Prosilica GE

camera is

disconnected. However, one could still hit the 'acquire start/stop' and

other buttons

via the medm GUI and access the PVs.


 One would wish to have a more detectable effect so that one could not

access

the camera's PVs, when the camera became offline. The attached patch

will disable

the PVs access, if the Ethernet cable for the GigE camera is

disconnected. If

the camera becomes online via Ethernet, the PVs will be accessible again.

  The patch is tested with the  GigE camera.

  Cheers,
  Kate Feng

--- asynRecord.c.orig	2012-12-21 17:34:45.000000000 -0500
+++ asynRecord.c	2013-05-16 13:41:37.651237452 -0400
@@ -874,12 +874,26 @@
     asynPrint(pasynUser, ASYN_TRACE_FLOW,
               "%s: exception %d\n",
               pasynRec->name, (int) exception);
-    if(callLock)
-        dbScanLock((dbCommon *) pasynRec);
+
+    switch(exception) {
+    case asynExceptionConnect:
+         if ((pasynRec->cnct) && callLock) dbScanLock((dbCommon *) pasynRec);
+         break;
+    default: 
+         if (callLock) dbScanLock((dbCommon *) pasynRec);
+         break;
+    }
     /* There has been a change in connect or enable status */
     monitorStatus(pasynRec);
-    if(callLock)
-        dbScanUnlock((dbCommon *) pasynRec);
+
+    switch(exception) {
+    case asynExceptionConnect:
+         if((pasynRec->cnct) && callLock) dbScanUnlock((dbCommon *) pasynRec);
+         break;
+    default: 
+         if (callLock) dbScanUnlock((dbCommon *) pasynRec);
+         break;
+    }        
 }
 
 static void queueTimeoutCallbackProcess(asynUser * pasynUser)


Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System