ucosII在什么时候会发生任务调度？

sxy4517

ucosII在什么时候会发生任务调度？ [复制链接]

 请教大虾们，ucosII在什么时候会发生任务调度？

jorya_txj

任务自己放弃cpu或者被更高优先级的任务所抢占，建议使用raw-os.

sxy4517

jorya_txj 发表于 2015-4-1 11:16
任务自己放弃cpu或者被更高优先级的任务所抢占，建议使用raw-os.

谢谢！

aiohu

stick  prio sechel     都可以触发调度

aiohu

os里5个链表，你搞明白UCOS就差不多理解了

JasonWangSE

建议参考uCOS的user manual，里面有详细的说明所有的scheduling points
A task signals or sends a message to another task;
A task calls OSTimeDly() or OSTimeDlyHMSM();
A task waits for an event to occur and the event has not yet occurred;
If a task aborts a pend;
If a task is created;
If a task is deleted;
If a kernel object is deleted;
A task changes the priority of itself or another task;
A task suspends itself by calling OSTaskSuspend();
A task resumes another task that was suspended by OSTaskSuspend();
At the end of all nested ISRs;
The scheduler is unlocked by calling OSSchedUnlock();
A task gives up its time quanta by calling OSSchedRoundRobinYield();
The user calls OSSched();

southernsky

长知识了   

sxy4517

JasonWangSE 发表于 2016-6-15 09:53
建议参考uCOS的user manual，里面有详细的说明所有的scheduling points
A task signals or sends a messag ...

304879836

只要是在函数中调用到了Sched ()函数都会发生任务的调度，但是在本函数中，也有判断是否存在任务优先级高于调用本任务的优先级，如果有更高的优先级，那么进行调度，如果没有，返回原函数。当然IntNesting宏判断是否存在中断运行也是必要的  总的来说   只要有Sched （）就会存在调度的可能性  具体的从实际中出发会好理解