Renesas 70 - Manual (Page 35)

Chapter 3 Introduction to MR308
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3.3.4 Task Control Block(TCB)
The task control block (TCB) refers to the data block that the real-time OS uses for individual task status, priority,
and other control purposes.
The MR308 manages the following task information as the task control block
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Task connection pointer
Task connection pointer used for ready queue formation or other purposes.
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Task status
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Task priority
•
Task register information and other data 26 storage stack area pointer(current SP register value)
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Wake-up counter
Task wake-up request storage area.
•
Time-out counter or wait flag pattern
When a task is in a time-out wait state, the remaining wait time is stored; if in a flag wait state, the
flag's wait pattern is stored in this area.
•
Flag wait mode
This is a wait mode during eventflag wait.
•
Timer queue connection pointer
This area is used when using the timeout function. This area stores the task connection pointer used
when constructing the timer queue.
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Flag wait pattern
This area is used when using the timeout function.
This area stores the flag wait pattern when using the eventflag wait service call with the timeout func-
tion (twai_flg). No flag wait pattern area is allocated when the eventflag is not used.
•
Startup request counter
This is the area in which task startup requests are accumulated.
•
Extended task information
Extended task information that was set during task generation is stored in this area.
The task control block is schematized in Figure 3.17 .
26 Called the task context