FreeRTOS手册 Thefollowingstandardfeaturesareprovided. •ChoiceofRTOSschedulingpolicy 1.Pre-emptive: Alwaysrunsthehighestavailabletask.Tasksofidenticalpriority shareCPUtime(fullypre-emptivewithroundrobintimeslicing). 2.Cooperative: Contextswitchesonlyoccurifataskblo