?? os_core.c
字號:
* Arguments : pevent is a pointer to the event control block allocated to the event.
*
* Returns : none
*
* Note : This function is INTERNAL to uC/OS-II and your application should not call it.
*********************************************************************************************************
*/
#if ((OS_Q_EN > 0) && (OS_MAX_QS > 0)) || (OS_MBOX_EN > 0) || (OS_SEM_EN > 0) || (OS_MUTEX_EN > 0)
void OS_EventWaitListInit (OS_EVENT *pevent)
{
INT8U *ptbl;
pevent->OSEventGrp = 0x00; /* No task waiting on event */
ptbl = &pevent->OSEventTbl[0];
#if OS_EVENT_TBL_SIZE > 0
*ptbl++ = 0x00;
#endif
#if OS_EVENT_TBL_SIZE > 1
*ptbl++ = 0x00;
#endif
#if OS_EVENT_TBL_SIZE > 2
*ptbl++ = 0x00;
#endif
#if OS_EVENT_TBL_SIZE > 3
*ptbl++ = 0x00;
#endif
#if OS_EVENT_TBL_SIZE > 4
*ptbl++ = 0x00;
#endif
#if OS_EVENT_TBL_SIZE > 5
*ptbl++ = 0x00;
#endif
#if OS_EVENT_TBL_SIZE > 6
*ptbl++ = 0x00;
#endif
#if OS_EVENT_TBL_SIZE > 7
*ptbl = 0x00;
#endif
}
#endif
/*$PAGE*/
/*
*********************************************************************************************************
* INITIALIZATION
* INITIALIZE THE FREE LIST OF EVENT CONTROL BLOCKS
*
* Description: This function is called by OSInit() to initialize the free list of event control blocks.
*
* Arguments : none
*
* Returns : none
*********************************************************************************************************
*/
static void OS_InitEventList (void)
{
#if (OS_EVENT_EN > 0) && (OS_MAX_EVENTS > 0)
#if (OS_MAX_EVENTS > 1)
INT16U i;
OS_EVENT *pevent1;
OS_EVENT *pevent2;
pevent1 = &OSEventTbl[0];
pevent2 = &OSEventTbl[1];
for (i = 0; i < (OS_MAX_EVENTS - 1); i++)
{ /* Init. list of free EVENT control blocks */
pevent1->OSEventType = OS_EVENT_TYPE_UNUSED;
pevent1->OSEventPtr = pevent2;
pevent1++;
pevent2++;
}
pevent1->OSEventType = OS_EVENT_TYPE_UNUSED;
pevent1->OSEventPtr = (OS_EVENT *)0;
OSEventFreeList = &OSEventTbl[0];
#else
OSEventFreeList = &OSEventTbl[0]; /* Only have ONE event control block */
OSEventFreeList->OSEventType = OS_EVENT_TYPE_UNUSED;
OSEventFreeList->OSEventPtr = (OS_EVENT *)0;
#endif
#endif
}
/*$PAGE*/
/*
*********************************************************************************************************
* INITIALIZATION
* INITIALIZE MISCELLANEOUS VARIABLES
*
* Description: This function is called by OSInit() to initialize miscellaneous variables.
*
* Arguments : none
*
* Returns : none
*********************************************************************************************************
*/
static void OS_InitMisc (void)
{
#if OS_TIME_GET_SET_EN > 0
OSTime = 0L; /* Clear the 32-bit system clock */
#endif
OSIntNesting = 0; /* Clear the interrupt nesting counter */
OSLockNesting = 0; /* Clear the scheduling lock counter */
OSTaskCtr = 0; /* Clear the number of tasks */
OSRunning = FALSE; /* Indicate that multitasking not started */
OSCtxSwCtr = 0; /* Clear the context switch counter */
OSIdleCtr = 0L; /* Clear the 32-bit idle counter */
#if (OS_TASK_STAT_EN > 0) && (OS_TASK_CREATE_EXT_EN > 0)
OSIdleCtrRun = 0L;
OSIdleCtrMax = 0L;
OSStatRdy = FALSE; /* Statistic task is not ready */
#endif
}
/*$PAGE*/
/*
*********************************************************************************************************
* INITIALIZATION
* INITIALIZE THE READY LIST
*
* Description: This function is called by OSInit() to initialize the Ready List.
*
* Arguments : none
*
* Returns : none
*********************************************************************************************************
*/
static void OS_InitRdyList (void)
{
INT16U i;
INT8U *prdytbl;
OSRdyGrp = 0x00; /* Clear the ready list */
prdytbl = &OSRdyTbl[0];
for (i = 0; i < OS_RDY_TBL_SIZE; i++)
{
*prdytbl++ = 0x00;
}
OSPrioCur = 0;
OSPrioHighRdy = 0;
OSTCBHighRdy = (OS_TCB *)0;
OSTCBCur = (OS_TCB *)0;
}
/*$PAGE*/
/*
*********************************************************************************************************
* INITIALIZATION
* CREATING THE IDLE TASK
*
* Description: This function creates the Idle Task.
*
* Arguments : none
*
* Returns : none
*********************************************************************************************************
*/
static void OS_InitTaskIdle (void)
{
#if OS_TASK_CREATE_EXT_EN > 0
#if OS_STK_GROWTH == 1
(void)OSTaskCreateExt(OS_TaskIdle,
(void *)0, /* No arguments passed to OS_TaskIdle() */
&OSTaskIdleStk[OS_TASK_IDLE_STK_SIZE - 1], /* Set Top-Of-Stack */
OS_IDLE_PRIO, /* Lowest priority level */
OS_TASK_IDLE_ID,
&OSTaskIdleStk[0], /* Set Bottom-Of-Stack */
OS_TASK_IDLE_STK_SIZE,
(void *)0, /* No TCB extension */
OS_TASK_OPT_STK_CHK | OS_TASK_OPT_STK_CLR);/* Enable stack checking + clear stack */
#else
(void)OSTaskCreateExt(OS_TaskIdle,
(void *)0, /* No arguments passed to OS_TaskIdle() */
&OSTaskIdleStk[0], /* Set Top-Of-Stack */
OS_IDLE_PRIO, /* Lowest priority level */
OS_TASK_IDLE_ID,
&OSTaskIdleStk[OS_TASK_IDLE_STK_SIZE - 1], /* Set Bottom-Of-Stack */
OS_TASK_IDLE_STK_SIZE,
(void *)0, /* No TCB extension */
OS_TASK_OPT_STK_CHK | OS_TASK_OPT_STK_CLR);/* Enable stack checking + clear stack */
#endif
#else
#if OS_STK_GROWTH == 1
(void)OSTaskCreate(OS_TaskIdle,
(void *)0,
&OSTaskIdleStk[OS_TASK_IDLE_STK_SIZE - 1],
OS_IDLE_PRIO);
#else
(void)OSTaskCreate(OS_TaskIdle,
(void *)0,
&OSTaskIdleStk[0],
OS_IDLE_PRIO);
#endif
#endif
}
/*$PAGE*/
/*
*********************************************************************************************************
* INITIALIZATION
* CREATING THE STATISTIC TASK
*
* Description: This function creates the Statistic Task.
*
* Arguments : none
*
* Returns : none
*********************************************************************************************************
*/
#if OS_TASK_STAT_EN > 0
static void OS_InitTaskStat (void)
{
#if OS_TASK_CREATE_EXT_EN > 0
#if OS_STK_GROWTH == 1
(void)OSTaskCreateExt(OS_TaskStat,
(void *)0, /* No args passed to OS_TaskStat()*/
&OSTaskStatStk[OS_TASK_STAT_STK_SIZE - 1], /* Set Top-Of-Stack */
OS_STAT_PRIO, /* One higher than the idle task */
OS_TASK_STAT_ID,
&OSTaskStatStk[0], /* Set Bottom-Of-Stack */
OS_TASK_STAT_STK_SIZE,
(void *)0, /* No TCB extension */
OS_TASK_OPT_STK_CHK | OS_TASK_OPT_STK_CLR); /* Enable stack checking + clear */
#else
(void)OSTaskCreateExt(OS_TaskStat,
(void *)0, /* No args passed to OS_TaskStat()*/
&OSTaskStatStk[0], /* Set Top-Of-Stack */
OS_STAT_PRIO, /* One higher than the idle task */
OS_TASK_STAT_ID,
&OSTaskStatStk[OS_TASK_STAT_STK_SIZE - 1], /* Set Bottom-Of-Stack */
OS_TASK_STAT_STK_SIZE,
(void *)0, /* No TCB extension */
OS_TASK_OPT_STK_CHK | OS_TASK_OPT_STK_CLR); /* Enable stack checking + clear */
#endif
#else
#if OS_STK_GROWTH == 1
(void)OSTaskCreate(OS_TaskStat,
(void *)0, /* No args passed to OS_TaskStat()*/
&OSTaskStatStk[OS_TASK_STAT_STK_SIZE - 1], /* Set Top-Of-Stack */
OS_STAT_PRIO); /* One higher than the idle task */
#else
(void)OSTaskCreate(OS_TaskStat,
(void *)0, /* No args passed to OS_TaskStat()*/
&OSTaskStatStk[0], /* Set Top-Of-Stack */
OS_STAT_PRIO); /* One higher than the idle task */
#endif
#endif
}
#endif
/*$PAGE*/
/*
*********************************************************************************************************
* INITIALIZATION
* INITIALIZE THE FREE LIST OF TASK CONTROL BLOCKS
*
* Description: This function is called by OSInit() to initialize the free list of OS_TCBs.
*
* Arguments : none
*
* Returns : none
*********************************************************************************************************
*/
static void OS_InitTCBList (void)
{
INT8U i;
OS_TCB *ptcb1;
OS_TCB *ptcb2;
OSTCBList = (OS_TCB *)0; /* TCB Initialization ，初始化TCB鏈表頭指針為null */
for (i = 0; i < (OS_LOWEST_PRIO + 1); i++)
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