?? os_core.c
字號:
if ((ptcb->OSTCBStat & OS_STAT_SUSPEND) == OS_STAT_RDY) { /* Is task suspended? */
OSRdyGrp |= ptcb->OSTCBBitY; /* No, Make ready */
OSRdyTbl[ptcb->OSTCBY] |= ptcb->OSTCBBitX;
}
}
}
ptcb = ptcb->OSTCBNext; /* Point at next TCB in TCB list */
OS_EXIT_CRITICAL();
}
}
}
/*$PAGE*/
/*
*********************************************************************************************************
* GET VERSION
*
* Description: This function is used to return the version number of uC/OS-II. The returned value
* corresponds to uC/OS-II's version number multiplied by 100. In other words, version 2.00
* would be returned as 200.
*
* Arguments : none
*
* Returns : the version number of uC/OS-II multiplied by 100.
*********************************************************************************************************
*/
INT16U OSVersion (void)
{
return (OS_VERSION);
}
/*$PAGE*/
/*
*********************************************************************************************************
* DUMMY FUNCTION
*
* Description: This function doesn't do anything. It is called by OSTaskDel().
*
* Arguments : none
*
* Returns : none
*********************************************************************************************************
*/
#if OS_TASK_DEL_EN > 0
void OS_Dummy (void)
{
}
#endif
/*$PAGE*/
/*
*********************************************************************************************************
* MAKE TASK READY TO RUN BASED ON EVENT OCCURING
*
* Description: This function is called by other uC/OS-II services and is used to ready a task that was
* waiting for an event to occur.
*
* Arguments : pevent is a pointer to the event control block corresponding to the event.
*
* pmsg is a pointer to a message. This pointer is used by message oriented services
* such as MAILBOXEs and QUEUEs. The pointer is not used when called by other
* service functions.
*
* msk is a mask that is used to clear the status byte of the TCB. For example,
* OSSemPost() will pass OS_STAT_SEM, OSMboxPost() will pass OS_STAT_MBOX etc.
*
* pend_stat is used to indicate the readied task's pending status:
*
* OS_STAT_PEND_OK Task ready due to a post (or delete), not a timeout or
* an abort.
* OS_STAT_PEND_ABORT Task ready due to an abort.
*
* Returns : none
*
* Note : This function is INTERNAL to uC/OS-II and your application should not call it.
*********************************************************************************************************
*/
#if (OS_EVENT_EN)
INT8U OS_EventTaskRdy (OS_EVENT *pevent, void *pmsg, INT8U msk, INT8U pend_stat)
{
OS_TCB *ptcb;
INT8U y;
INT8U x;
INT8U prio;
#if OS_LOWEST_PRIO > 63
INT16U *ptbl;
#endif
#if OS_LOWEST_PRIO <= 63
y = OSUnMapTbl[pevent->OSEventGrp]; /* Find HPT waiting for message */
x = OSUnMapTbl[pevent->OSEventTbl[y]];
prio = (INT8U)((y << 3) + x); /* Find priority of task getting the msg */
#else
if ((pevent->OSEventGrp & 0xFF) != 0) { /* Find HPT waiting for message */
y = OSUnMapTbl[ pevent->OSEventGrp & 0xFF];
} else {
y = OSUnMapTbl[(pevent->OSEventGrp >> 8) & 0xFF] + 8;
}
ptbl = &pevent->OSEventTbl[y];
if ((*ptbl & 0xFF) != 0) {
x = OSUnMapTbl[*ptbl & 0xFF];
} else {
x = OSUnMapTbl[(*ptbl >> 8) & 0xFF] + 8;
}
prio = (INT8U)((y << 4) + x); /* Find priority of task getting the msg */
#endif
ptcb = OSTCBPrioTbl[prio]; /* Point to this task's OS_TCB */
ptcb->OSTCBDly = 0; /* Prevent OSTimeTick() from readying task */
#if ((OS_Q_EN > 0) && (OS_MAX_QS > 0)) || (OS_MBOX_EN > 0)
ptcb->OSTCBMsg = pmsg; /* Send message directly to waiting task */
#else
pmsg = pmsg; /* Prevent compiler warning if not used */
#endif
ptcb->OSTCBStat &= ~msk; /* Clear bit associated with event type */
ptcb->OSTCBStatPend = pend_stat; /* Set pend status of post or abort */
/* See if task is ready (could be susp'd) */
if ((ptcb->OSTCBStat & OS_STAT_SUSPEND) == OS_STAT_RDY) {
OSRdyGrp |= ptcb->OSTCBBitY; /* Put task in the ready to run list */
OSRdyTbl[y] |= ptcb->OSTCBBitX;
}
OS_EventTaskRemove(ptcb, pevent); /* Remove this task from event wait list */
#if (OS_EVENT_MULTI_EN > 0)
if (ptcb->OSTCBEventMultiPtr != (OS_EVENT **)0) { /* Remove this task from events' wait lists */
OS_EventTaskRemoveMulti(ptcb, ptcb->OSTCBEventMultiPtr);
ptcb->OSTCBEventPtr = (OS_EVENT *)pevent;/* Return event as first multi-pend event ready*/
}
#endif
return (prio);
}
#endif
/*$PAGE*/
/*
*********************************************************************************************************
* MAKE TASK WAIT FOR EVENT TO OCCUR
*
* Description: This function is called by other uC/OS-II services to suspend a task because an event has
* not occurred.
*
* Arguments : pevent is a pointer to the event control block for which the task will be waiting for.
*
* Returns : none
*
* Note : This function is INTERNAL to uC/OS-II and your application should not call it.
*********************************************************************************************************
*/
#if (OS_EVENT_EN)
void OS_EventTaskWait (OS_EVENT *pevent)
{
INT8U y;
OSTCBCur->OSTCBEventPtr = pevent; /* Store ptr to ECB in TCB */
pevent->OSEventTbl[OSTCBCur->OSTCBY] |= OSTCBCur->OSTCBBitX; /* Put task in waiting list */
pevent->OSEventGrp |= OSTCBCur->OSTCBBitY;
y = OSTCBCur->OSTCBY; /* Task no longer ready */
OSRdyTbl[y] &= ~OSTCBCur->OSTCBBitX;
if (OSRdyTbl[y] == 0) {
OSRdyGrp &= ~OSTCBCur->OSTCBBitY; /* Clear event grp bit if this was only task pending */
}
}
#endif
/*$PAGE*/
/*
*********************************************************************************************************
* MAKE TASK WAIT FOR ANY OF MULTIPLE EVENTS TO OCCUR
*
* Description: This function is called by other uC/OS-II services to suspend a task because any one of
* multiple events has not occurred.
*
* Arguments : pevents_wait is a pointer to an array of event control blocks, NULL-terminated, for
* which the task will be waiting for.
*
* Returns : none.
*
* Note : This function is INTERNAL to uC/OS-II and your application should not call it.
*********************************************************************************************************
*/
#if ((OS_EVENT_EN) && (OS_EVENT_MULTI_EN > 0))
void OS_EventTaskWaitMulti (OS_EVENT **pevents_wait)
{
OS_EVENT **pevents;
OS_EVENT *pevent;
INT8U y;
OSTCBCur->OSTCBEventPtr = (OS_EVENT *)0;
OSTCBCur->OSTCBEventMultiPtr = (OS_EVENT **)pevents_wait; /* Store ptr to ECBs in TCB */
pevents = pevents_wait;
pevent = *pevents;
while (pevent != (OS_EVENT *)0) { /* Put task in waiting lists */
pevent->OSEventTbl[OSTCBCur->OSTCBY] |= OSTCBCur->OSTCBBitX;
pevent->OSEventGrp |= OSTCBCur->OSTCBBitY;
pevents++;
pevent = *pevents;
}
y = OSTCBCur->OSTCBY; /* Task no longer ready */
OSRdyTbl[y] &= ~OSTCBCur->OSTCBBitX;
if (OSRdyTbl[y] == 0) {
OSRdyGrp &= ~OSTCBCur->OSTCBBitY; /* Clear event grp bit if this was only task pending */
}
}
#endif
/*$PAGE*/
/*
*********************************************************************************************************
* REMOVE TASK FROM EVENT WAIT LIST
*
* Description: Remove a task from an event's wait list.
*
* Arguments : ptcb is a pointer to the task to remove.
*
* pevent is a pointer to the event control block.
*
* Returns : none
*
* Note : This function is INTERNAL to uC/OS-II and your application should not call it.
*********************************************************************************************************
*/
#if (OS_EVENT_EN)
void OS_EventTaskRemove (OS_TCB *ptcb,
OS_EVENT *pevent)
{
INT8U y;
y = ptcb->OSTCBY;
pevent->OSEventTbl[y] &= ~ptcb->OSTCBBitX; /* Remove task from wait list */
if (pevent->OSEventTbl[y] == 0) {
pevent->OSEventGrp &= ~ptcb->OSTCBBitY;
}
}
#endif
/*$PAGE*/
/*
*********************************************************************************************************
* REMOVE TASK FROM MULTIPLE EVENTS WAIT LISTS
*
* Description: Remove a task from multiple events' wait lists.
*
* Arguments : ptcb is a pointer to the task to remove.
*
* pevents_multi is a pointer to the array of event control blocks, NULL-terminated.
*
* Returns : none
*
* Note : This function is INTERNAL to uC/OS-II and your application should not call it.
*********************************************************************************************************
*/
#if ((OS_EVENT_EN) && (OS_EVENT_MULTI_EN > 0))
void OS_EventTaskRemoveMulti (OS_TCB *ptcb,
OS_EVENT **pevents_multi)
{
OS_EVENT **pevents;
OS_EVENT *pevent;
INT8U y;
#if (OS_LOWEST_PRIO <= 63)
INT8U bity;
INT8U bitx;
#else
INT16U bity;
INT16U bitx;
#endif
y = ptcb->OSTCBY;
bity = ptcb->OSTCBBitY;
bitx = ptcb->OSTCBBitX;
pevents = pevents_multi;
pevent = *pevents;
while (pevent != (OS_EVENT *)0) { /* Remove task from all events' wait lists */
pevent->OSEventTbl[y] &= ~bitx;
if (pevent->OSEventTbl[y] == 0) {
pevent->OSEventGrp &= ~bity;
}
pevents++;
pevent = *pevents;
}
}
#endif
/*$PAGE*/
/*
*********************************************************************************************************
* INITIALIZE EVENT CONTROL BLOCK'S WAIT LIST
*
* Description: This function is called by other uC/OS-II services to initialize the event wait list.
*
* Arguments : pevent is a pointer to the event control block allocated to the event.
*
* Returns : none
*
?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -