ucos的延时函数

767904101

OSTimeDly(200);
void  OSTimeDly (INT16U ticks)
{
#if OS_CRITICAL_METHOD == 3                      /* Allocate storage for CPU status register           */
    OS_CPU_SR  cpu_sr;
#endif   

    if (ticks > 0) {                                                      /* 0 means no delay!         */
        OS_ENTER_CRITICAL();
        if ((OSRdyTbl[OSTCBCur->OSTCBY] &= ~OSTCBCur->OSTCBBitX) == 0) {  /* Delay current task        */
            OSRdyGrp &= ~OSTCBCur->OSTCBBitY;
        }
        OSTCBCur->OSTCBDly = ticks;                                       /* Load ticks in TCB         */
        OS_EXIT_CRITICAL();
        OS_Sched();                                                       /* Find next task to run!    */
    }
}

OSTCBCur->OSTCBDly = ticks;
OSTCBDly在哪里做递减运算?  是一个寄存器么?

正点原子

看邵贝贝的书.