Chapter 3
Ada Language Reference
©
National Instruments Corporation
3-11
External_Input( )
is much the same; it returns an input vector from
the software data bus.
External_Input( )
returns the value of
SCHEDULER_STATUS
, which is passed to it by the scheduler.
External_Output( ) Procedure
procedure External_Output(Bus: in RT_REAL_ARRAY;
YE_PTR: in RT_INTEGER;
NUMOUT: in RT_INTEGER;
SCHEDULER_STATUS: out INTEGER)
External_Output
is for use in simulation comparison mode. It
places output data values into an output pool in memory. In the target
version of
sa_utils.a/.ada
, the operation of
External_Output( )
is much the same; it posts an output vector to the software data bus.
External_Output( )
returns the value of
SCHEDULER_STATUS
,
which is passed to it by the scheduler.
UserCode Blocks
This section describes how to link UserCode Blocks (UCBs) with
AutoCode or SystemBuild applications.
Linking Handwritten UCBs with AutoCode Applications
To write the implementation code for UserCode Blocks (UCBs), refer to
the
sa_user_.a/.ada
and
sa_user.a/.ada
files, which are provided
in your
src
directory. These files contain an example of the declaration of
the calling sequence described in the
section. Make one or
more copies of these files and insert your code that implements the
functionality of the UCBs. You can place one or more uniquely named
UCB code procedures inside each copy of the
sa_user_.a/.ada
and
sa_user.a/.ada
files and give the copies any convenient names. If you
include renamed files, place the names in the stand-alone file compilation
script (
compile_ada_sa.sh
) for automatic compilation.
The computations performed by UCBs can update both block states and
outputs.
