Experimental Physics and
Industrial Control System

Mark Rivers <[email protected]> · Mon, 2 Feb 2015 12:42:30 +0000

One problem is that you used upper-case for VAL.  In the aiRecord.h file that is lower-case.  It is upper case only when using the PV name.

So change this:
precord->VAL=3;
e=precord->VAL;

to this:
precord->val=3;
e=precord->val;

The compiler is clear about other errors too, like that precord->DOUBLE does not exist, etc.

Mark

________________________________
From: [email protected] [[email protected]] on behalf of priya tiwari [[email protected]]
Sent: Monday, February 02, 2015 12:05 AM
To: Mark Engbretson
Cc: [email protected]
Subject: Re: related to coding

sorry sir this is compile time error, What would be the solution of this problem? Actually i want to write a simple code for putting a value in VAL field of ai record.

On Mon, Feb 2, 2015 at 10:47 AM, Mark Engbretson <[email protected]<mailto:[email protected]>> wrote:
Note: these are NOT run time errors, your code doesn't even compile.

Sent from my iPad 4

On Feb 1, 2015, at 23:05, priya tiwari <[email protected]<mailto:[email protected]>> wrote:

Thanks Sir,
I changed in a code but still i got the errors at run time.please provide me solution.

On Mon, Feb 2, 2015 at 9:50 AM, Mooney, Tim M. <[email protected]<mailto:[email protected]>> wrote:
Hi Priya,

Return 2, instead of 0, from read_ai.  That tells the record that you put the value in VAL.  If you return 0, you are telling the record you put the value in RVAL, and that the record should convert RVAL to get VAL.
See "Device Support Routines" in
https://wiki-ext.aps.anl.gov/epics/index.php/RRM_3-14_Analog_Input

Tim Mooney ([email protected]<mailto:[email protected]>) (630)252-5417
Software Services Group (www.aps.anl.gov<http://www.aps.anl.gov>)
Advanced Photon Source, Argonne National Lab

________________________________
From: [email protected]<mailto:[email protected]> [[email protected]<mailto:[email protected]>] on behalf of priya tiwari [[email protected]<mailto:[email protected]>]
Sent: Sunday, February 01, 2015 9:54 PM
To: [email protected]<mailto:[email protected]>
Subject: related to coding

Hello,
I am trying to write the value into val field of ai record from device support.I am beginner in EPICS so I have no idea about this. But i have tried then i got the errors at run time please help me.I am attaching code file.
Thanks in advance...

<Screenshot from 2015-02-02 10:30:06.png>
<dbtest.c>

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System