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Task Switching
RTX-51 contains an event-driven task switching mechanism that switches tasks
according to their priority (preemptive multitasking). An additional task
switching mechanism which switches according to the time-slice mode can be
optionally used (round-robin scheduling).
RTX-51 recognizes four priority levels; priorities 0, 1 and 2 can be assigned to
standard tasks. Priority 3 is reserved for fast tasks.
The individual tasks can wait for various events to occur without requiring
processor time (no processor burdening). Events can be characterized as the
receipt of messages, signals, interrupts and time-outs, or a combination of these.
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