Experimental Physics and
Industrial Control System

Ralph Lange <[email protected]> · Fri, 01 Jun 2012 18:35:25 +0200

On 01.06.2012 18:02, Andrew Johnson wrote:
> Hi Bob,
>
> On 2012-06-01 Dalesio, Leo wrote:
>> The wiki page now clearly states in the introduction to the MBBI and MBBO
>>  that the bits must be continuous. 
> My point was that the record code doesn't need the bits to be contiguous; it 
> will still work properly as long as the result of (RVAL << SHFT) matches one 
> of the xxVL field values.  I have no intention of letting anyone change the 
> code to break that since there are too many device supports and IOCs out there 
> which could be relying on this.

What about allowing MASK to be set in the database, and only setting it
in the init_record() code, if it is 0.
That would not break existing code (or would it?), and provide an easy
way to set MASK directly (contiguous or not), avoiding NOBT and SHFT.

~Ralph

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System