Experimental Physics and Industrial Control System
EPICS philosophical question of the day........
Suppose there is a piece of equipment which can be put into
one of several modes of operation. Suppose also that the set of possible
modes depends on the hardware configuration of the equipment. Suppose
finally that the set of possible modes can be queried programmatically.
What is the "best" way to populate the "ZRST", "ONST", ...
fields of the record?
Query the device during the "record init" phase, and
programmatically fill in the fields?
Edit the .db file to conform to the known H/W configuration,
and re-edit as needed if the H/W changes?
Other?
What are pros and cons of various approaches.
One example of such H/W are certain frame grabbers which have
H/W image processing built onto daughter cards. There are different
sets of image processing algorithms available with different daughter
cards attached.
Another example is a transient recorder with options for
stored waveform length, which are ultimately constrained by the amount
of memory installed.
-- Larry
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