Configuring Scheduling
For details about solver options, see Solver Pane in
the Simulink reference documentation.
Configuring Start and Stop Times
The stop
time must be greater than or equal to the start time.
If the stop time is zero, or if the total simulation time (Stop minus Start)
is less than zero, the generated program runs for one step. If the
stop time is set to inf, the generated
program runs indefinitely.
When using the GRT or Wind River Systems Tornado targets,
you can override the stop time when running a generated program from
the Microsoft Windows command prompt or UNIX[1]
command line. To override the stop time that was set during
code generation, use the -tf switch.
model -tf n
The program runs for n seconds. If n
= inf, the program runs indefinitely. See Getting
Started in the Real-Time Workshop documentation for an
example of the use of this option.
Certain
blocks have a dependency on absolute time. If you are designing a
program that is intended to run indefinitely (Stop time = inf),
and your generated code does not use the rtModel data
structure (that is, it uses simstructs instead),
you must not use these blocks. See Limitations on the Use of Absolute Time for
a list of blocks that can potentially overflow timers.
If you know how long an application that depends on absolute
time needs to run, you can ensure that timers do not overflow and
that they use optimal word sizes by specifying the Application
lifespan (days) parameter on the Optimization pane.
See Controlling Memory Allocation for Time Counters for details.
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Configuring the Solver Type
For code generation, you must configure a model to use a fixed-step
solver for all targets except the S-function and RSim targets. You
can configure the S-function and RSim targets with a fixed-step or
variable-step solver.
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Configuring the Tasking Mode
The Real-Time Workshop product supports both single-tasking
and multitasking modes for periodic sample times. See Scheduling Considerations for
details.
[1] UNIX is a registered trademark of The Open Group in the
United States and other countries.
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 | Using Timers | | Simulation Considerations That Affect Code Generation |  |
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