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Technical Support
On-Line Manuals
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 Reference
Task 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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