Variant Systems with Conditional Systems
You can use the conditionally executed systems (control ports) such as
Enable, Trigger, Reset, and the
Function-Call Subsystems within the Variant Subsystem
block. When the Variant activation time parameter is set to
code compile in the Block Parameters dialog box, a mix of
control ports in a Variant Subsystem block as variant choice is not
supported. Also, all control port types must have the same names. For more information
on conditionally executed systems, see Conditionally Executed Subsystems Overview.
Export-Function Model with Variant Subsystem
Consider a Variant model containing a Variant Subsystem block. If you
use Function-Call system as a variant choice for the
Linear
Subsystem block then the other Subsystem block
(Nonlinear) within the Variant Subsystem block
must also be Function-Call system. Additionally, the control ports in
Linear and Nonlinear blocks and the
corresponding inport block must have the same name
(fcn).
In the generated code, the code inside fcn definition is guarded by C preprocessor conditionals inside export function.
fcn() {
#if VSSMODE==0
// code for Linear choice
.......
#endif
#if VSSMODE==1
// code for Nonlinear choice
.......
#endif You can also have a similar modeling pattern with multi-point entry function using Model block. An example is as follows:
In the above example, fcln1, fcln2, and
fcln3 are routed through the Variant Subsystem using
Model blocks as variant choices.
These conditions are not supported when using conditionally executed systems within a Variant Subsystem block as variant choice:
Action ports as Variant choices
Variant choices containing Iterator port with generate preprocessor conditionals set to ON
Models with Initialize, Reset, Terminate, and Simulink functions
Note
Initialize and Terminate event ports are always unconditional because they control both the model default and block-specific initialize and terminate events of the referenced model. If you define an Initialize function block in the referenced model, it corresponds to an explicit initialize event.
Variant Subsystem with Enable Subsystem as Choice
Consider a Variant model containing a Variant Subsystem block. If you
use Enable Subsystem as a variant choice for the
Linear
Subsystem block then the other Subsystem block
(Nonlinear) within the Variant Subsystem block
must also be Enable Subsystem.
This model simulates and generates code based on VSSMODE
value.
Snippet of the generated code is as shown below.
step() {
#if VSSMODE==0
// code for Linear choice
.......
#elif VSSMODE==1
// code for Nonlinear choice
.......
#endif