Experimental Physics and
Industrial Control System

Michael Abbott <[email protected]> · Mon, 28 Nov 2005 21:01:16 +0000 (GMT)

On Mon, 28 Nov 2005, Carl Lionberger wrote:
The thought was that the subarray record would be purely a soft record,
and any hardware device support would be for waveform records that the
subarray would read from. The MALM code makes sense in this context
because the API for the dbaccess (as Noburu alluded to) always starts at
element 0 of the source record. Therefore it is impossible to index an
element larger than the buffer space you have.
You might consider writing a device support suite which supports a
waveform record of the length you want and a couple of ao or longout
records which control the index and length of the reference into the
hardware..

Sure, I did think of that, and if the subArray gives me trouble then I'll
revert back to that option. I still think the subArray might be smoother,
despite the slight impedance mismatch on the interfaces. Have to confess
before I opened the box I thought that's what the subArray was for!
It's true that to work in the way I'm thinking the subArray really needs
to know *two* pieces of information in place of MALM: its own maximum
length, and the maximum index into the stored array.

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System