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RTX166 Tiny User's Guide
Overview Real-Time Programs 
Theory of Operation 
Timer Tick Interrupt Tasks Task Management Events Task Scheduler Round-Robin Task Switching Cooperative Task Switching Stack Management Configuring RTX166 Tiny Using RTX166 Tiny Function ReferenceTask Management
RTX166 Tiny implements a state machine to manage task scheduling. Each RTX166 Tiny task is always in exactly one state which tells the disposition of the task. The following diagram shows how tasks move from one state to another.
| State | Description |
|---|---|
| Running | The task that is currently running is in the Running State. Only one task at a time may be in this state. The os_running_task_id routine returns the task number of the currently executing task. |
| Ready | Tasks which are ready to run are in the Ready State. Once the Running task has completed processing and the MCU can begin running another task, RTX166 Tiny selects and starts the next Ready task. |
| Waiting | Tasks which are waiting for an event are in the Waiting State. Once the event occurs, the task is switched to the Ready State. The os_wait function is used to place a task in the Waiting State. |
| Deleted | Tasks which have not been started or tasks which have been deleted are in the Deleted State. The os_delete_task routine places a task that has been started (with os_create_task) into the Deleted State. |
| Timeout | Tasks which were interrupted by a Round-Robin Time-Out are in the Timeout State. This state is equivalent to the Ready State. |
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