Hi Mark,
Shouldn't the Asyn mbb[io] device support have some generic way of asking the
driver if it has a set of strings for its various states? This would keep
the separation between the driver and the device support and still make it
possible for Brian to do what he wants without having to write a special
device support layer.
If you do add that, the device support is currently limited to 16 strings
(because that's the most that CA will send for a DBF_ENUM), but you probably
shouldn't limit the Asyn interface to that number.
- Andrew
On Thursday 19 February 2009 15:45:53 Mark Rivers wrote:
> Hi Brian,
>
> The asyn driver does not have access to the record. The driver only
> talks to device support, and the device support talks to the record.
>
> I don't think you can do what you want using standard asyn device
> support. But if you wrote your own device support for the mbbo record
> (based on the mbbo support in devAsyn/devAsynInt32.c for example) you
> could use the asynOctet interface to query the driver for the enum
> string values during initRecord, and set those enum string values in the
> record.
>
> Mark
>
>
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of tieman
> Sent: Thursday, February 19, 2009 3:40 PM
> To: tech talk
> Subject: Asyn driver access to PV fields.
>
> Hi all!
>
> I have a situation where I have an mbbo field that I would like to set
> programmatically at run time. Specifically, I would like to set ZSTR,
> ONST, etc... to specific values that are read back from hardware in a
> device driver at initialization. How can I do this from within an Asyn
> driver?
>
> Thanks!
>
> Brian
--
The best FOSS code is written to be read by other humans -- Harold Welte
- References:
- Asyn driver access to PV fields. tieman
- RE: Asyn driver access to PV fields. Mark Rivers
- Navigate by Date:
- Prev:
RE: Asyn driver access to PV fields. Mark Rivers
- Next:
Re: Asyn driver access to PV fields. Marty Kraimer
- Index:
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
<2009>
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
- Navigate by Thread:
- Prev:
RE: Asyn driver access to PV fields. Mark Rivers
- Next:
Re: Asyn driver access to PV fields. Marty Kraimer
- Index:
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
<2009>
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
|