OS_ERR_NONE
OS_ERR_OS_NOT_RUNNING The scheduler has been enabled 这句注释错了,应该是系统还没有开始运行
OS_ERR_SCHED_LOCKED The scheduler is still locked, still nested
OS_ERR_SCHED_NOT_LOCKED The scheduler was not locked
OS_ERR_SCHED_UNLOCK_ISR If you called this function from an ISR.