Experimental Physics and
Industrial Control System

Heinrich du Toit <[email protected]> · Tue, 19 Jun 2007 17:28:38 +0200

I'm still having trouble, this time letting the asynRegister interface
work with my asyn driver.

I register a simple asynInt32 interface.
And this works, if I use a simple ai/ao Record.

But when I try process from medm screen I get sigfault at line 1305
because pasynRecPvt->pasynInt32 = 0x0

Now pasynRecPvt gets setup in connectDevice in asynRecord.c
(asyn4-8/asyn/asynRecord/asynRecord.c - line 1076)

Now at line 1135  pasynInt32 gets set correctly according to my
debugger.
Funny thing is that it seems to execute twice - not sure how that works?

Anyways as soon as that is done pasynRecPvt->pasynInt32 does have the
link to my interface.

But then it gets cleared again at line 1161 ??
Obviously I don't have a asynFloat64 interface - I'm trying to test
asynInt32 :)
I don't really understand epics... but it seems like that line is
clearing the wrong pointers??

I changed the code to such:
 /* Get asynFloat64 interface if it exists*/
    pasynInterface = pasynManager->findInterface(pasynUser,
asynFloat64Type, 1);
    if(pasynInterface) {
        pasynRecPvt->pasynFloat64 = (asynFloat64 *)
pasynInterface->pinterface;
        pasynRecPvt->asynFloat64Pvt = pasynInterface->drvPvt;
        pasynRec->f64iv = 1;
    } else {
        pasynRecPvt->pasynFloat64 = 0;
        pasynRecPvt->asynFloat64Pvt = 0;
        pasynRec->f64iv = 0;
    }

and recompiled asyn

and now my problem seems to be solved..

:)
maybe I got outdated code of asyn?

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System