Experimental Physics and
Industrial Control System

Andrew Johnson <[email protected]> · Tue, 2 Dec 2014 11:57:57 -0600

Hi Eric,

The mbboDirect record was a bit of a mess in 3.14, it didn't always
behave as it should when you try using it in a way that the original
author didn't think about. I cleaned up both mbb*Direct record types for
the 3.15 release but that did change their behaviour somewhat in places.
The Release Notes describe what changed including fixing some of the
things you describe below.

I realize that this information doesn't help you immediately, I'm just
letting you know that the new release should be better when you get the
chance to upgrade to it.

- Andrew

On 12/01/2014 05:17 PM, Eric Norum wrote:
> A while back there were some threads discussing problems with mbboDirect
> record initialization.  Those problems appear to extend to
> autosave/restore, too.
> 
> I have an R3.14.12.3 IOC with an mbboDirect record of which I use four
> individual bits (4 through 7).  I originally had
> record(mbboDirect, "$(P)$(R)EVR:event122trig") {
>     field(DESC, "Heartbeat")
>     field(DTYP, "asynUInt32Digital")
>     field(OUT,  "@asynMask($(PORT) 0x37A 0xFF 0)")
>     field(NOBT, "8")
>     field(MASK, "0xFF")
>    info(autosaveFields_pass0, "VAL")
> }
> in the database, but that didn’t seem to work.  Everything got set back
> to 0 on IOC startup even though the autosave life contains a non zero
> value (e.g. 128 or 192).
> It appears that
>     info(autosaveFields_pass0, "B4 B5 B6 B7 VAL”)
>  works, but feels like a bit of a hack to me.
> Is there any better way of handling this?
> 
> Also, a client doing a caput to an mbboDirect record .VAL field doesn’t
> update the .Bx fields.  I think that was discussed previously, though.
> 
> Perhaps I should just replace the mbboDirect with a longout and make
> clients deal with all the bit testing/setting/clearing themselves.
> -- 
> Eric Norum
> [email protected] <mailto:[email protected]>
> 

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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System