MQX Software SolutionsのトピックHow can I explicitly perform a task switch?

MQX Software SolutionsのトピックHow can I explicitly perform a task switch? https://community.nxp.com/t5/MQX-Software-Solutions/How-can-I-explicitly-perform-a-task-switch/m-p/223667#M6003 <HTML><HEAD></HEAD><BODY><P>I have few tasks run in parallel, and I want to let the MQX OS manage the task queue according to task's priorities, without my interference.</P><P>Thus, I do not want task A to block itself (by using _task_block), come back to life only when  Task B will set it ready (by using _task_ready).</P><P></P><P>Currently, when I wish to switch tasks, I use _time_delay(1) - which is pretty bad programming practice, since this task will wake up after a whole millisecond at the minimum, and not when it is needed.</P><P>     </P><P>So, How can I explicitly perform a task switch?</P><P></P><P>Thanks,</P><P>Lior.</P></BODY></HTML> Sun, 13 Jan 2013 13:12:42 GMT panpwr 2013-01-13T13:12:42Z How can I explicitly perform a task switch? https://community.nxp.com/t5/MQX-Software-Solutions/How-can-I-explicitly-perform-a-task-switch/m-p/223667#M6003 <HTML><HEAD></HEAD><BODY><P>I have few tasks run in parallel, and I want to let the MQX OS manage the task queue according to task's priorities, without my interference.</P><P>Thus, I do not want task A to block itself (by using _task_block), come back to life only when  Task B will set it ready (by using _task_ready).</P><P></P><P>Currently, when I wish to switch tasks, I use _time_delay(1) - which is pretty bad programming practice, since this task will wake up after a whole millisecond at the minimum, and not when it is needed.</P><P>     </P><P>So, How can I explicitly perform a task switch?</P><P></P><P>Thanks,</P><P>Lior.</P></BODY></HTML> Sun, 13 Jan 2013 13:12:42 GMT https://community.nxp.com/t5/MQX-Software-Solutions/How-can-I-explicitly-perform-a-task-switch/m-p/223667#M6003 panpwr 2013-01-13T13:12:42Z Re: How can I explicitly perform a task switch? https://community.nxp.com/t5/MQX-Software-Solutions/How-can-I-explicitly-perform-a-task-switch/m-p/223668#M6004 <HTML><HEAD></HEAD><BODY><P>Hi Lior,</P><P></P><P>With FIFO scheduling, the active task runs, until any of the following occurs:</P><P></P><P> -the active task voluntarily relinquishes the processor, because it calls a blocking MQX function<BR /> -an interrupt occurs that has higher priority than the active task<BR /> -a task that has priority higher than the active task, becomes ready</P><P><BR />There exists _time_delay_ticks() function which gets parameter in minimum number of ticks to suspend the task. </P><P><BR />MQX supports also Round Robin scheduling, which is similar to FIFO scheduling, but with the additional constraint that each round robin task has a maximum amount of time (the time slice), during which it can be active. When the time slice expires, the MQX then performs a dispatch operation to determine, which task should become active.</P><P><SPAN class="mce_paste_marker"></SPAN></P></BODY></HTML> Mon, 14 Jan 2013 07:15:38 GMT https://community.nxp.com/t5/MQX-Software-Solutions/How-can-I-explicitly-perform-a-task-switch/m-p/223668#M6004 Martin_ 2013-01-14T07:15:38Z