Experimental Physics and
Industrial Control System

Benjamin Franksen <[email protected]> · Wed, 27 May 2009 11:07:45 +0200

On Tuesday 26 May 2009 21:10, Patrick Thomas wrote:
> Is it possible to create a function in snl which takes the names of
> process variables and does pvGet and pvSet on them?

Depends on what you mean with "names" (of PVs). This is a quote from the 
seqencer documentation (2.0.12, page 32):

"""
The built-in SNL functions such as pvGet cannot be directly used in 
user-supplied functions. However, most of the built-in functions have a C 
language equivalent, which begin with the preﬁx seq_ (e.g. pvGet becomes 
seq_pvGet). These C functions must pass a parameter identifying the calling 
state program, and if a database variable name is required, the channel 
index of that variable must be supplied. This channel index is obtained 
from the pvIndex function. Furthermore, if the code if complied with the +r 
option the database variables must be referenced as a structure element as 
described in “Variable Modiﬁcation for Reentrant Option” on page 33. 
Examination of the intermediate C code that the compiler produces will 
indicate how to use the built-in functions and database variables.
"""

HTH
Ben
-- 
"TDD replaces a type checker in Ruby in the same way that a
strong drink replaces sorrows."       (byorgey on #haskell)

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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System