INtime® 3.1 Software - tenAsys

5 Designing
RT applications
This chapter provides general guidelines for RT system design using INtime software.
Define the application
When designing an RT application, you should include these steps:
• Partition the application into Windows and RT components.
• List the INtime application’s inputs and outputs, and decide whether RT or
Windows services each system component. Decide which objects to use for
inter-thread synchronization and communication, both within the RT portion and
between the RT and Windows portions.
• List all threads that require the input and output. Define interrupts and decide
which ones require determinism. Assign interrupt levels and priorities to take
advantage of multitasking and preemptive, priority-based scheduling.
• Develop the detail for each thread in a block diagram.
• Decide if the application requires multiple processes, and if so, how they will use
shared memory and dynamic memory allocation.
• Design your user interface.
• Determine if you require custom devices and drivers.
• Determine if your application will run on a single system or be distributed over
multiple RT nodes.
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