uC/OS-II硬件初始化时，不需开全局中断吧

只看该作者 · 2012-11-13 09:27

我把uC/OS-II移植到C8051F020上，主函数位
{
   hardware_Initial();
   OSInit();
   ......
   OSTaskCreate(...);
   ......
Timer0Init();
OSStart();
}
我是在OSStart之前设置时钟Tick，这样安排合理不？

(2) 初始化中不需使能全局中断？在第一次调用OS_Sched()时会因为进出临界区而打开中断？
OS_ENTER_CRITICAL();
if ((OSIntNesting == 0) && (OSLockNesting == 0)) { /* Sched. only if all ISRs done & not locked */
      y          = OSUnMapTbl[OSRdyGrp];       /* Get pointer to HPT ready to run             */
      OSPrioHighRdy = (INT8U)((y << 3) + OSUnMapTbl[OSRdyTbl[y]]);
      if (OSPrioHighRdy != OSPrioCur) {             /* No Ctx Sw if current task is highest rdy    */
         OSTCBHighRdy = OSTCBPrioTbl[OSPrioHighRdy];
         OSCtxSwCtr++;                            /* Increment context switch counter          */
         OS_TASK_SW();                            /* Perform a context switch                   */
      }
}
OS_EXIT_CRITICAL();