📄 ucos_hc908.c
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* milli specifies the number of milliseconds (max. 999)
*
* Returns : OS_NO_ERR
* OS_TIME_INVALID_MINUTES
* OS_TIME_INVALID_SECONDS
* OS_TIME_INVALID_MS
* OS_TIME_ZERO_DLY
*
* Note(s) : The resolution on the milliseconds depends on the tick rate. For example, you can't do
* a 10 mS delay if the ticker interrupts every 100 mS. In this case, the delay would be
* set to 0. The actual delay is rounded to the nearest tick.
*********************************************************************************************************
*/
#if OS_TIME_DLY_HMSM_EN > 0
INT8U OSTimeDlyHMSM (INT8U hours, INT8U minutes, INT8U seconds, INT16U milli)
{
INT32U ticks;
INT16U loops;
if (hours > 0 || minutes > 0 || seconds > 0 || milli > 0) {
if (minutes > 59) {
return (OS_TIME_INVALID_MINUTES); /* Validate arguments to be within range */
}
if (seconds > 59) {
return (OS_TIME_INVALID_SECONDS);
}
if (milli > 999) {
return (OS_TIME_INVALID_MILLI);
}
/* Compute the total number of clock ticks required.. */
/* .. (rounded to the nearest tick) */
ticks = ((INT32U)hours * 3600L + (INT32U)minutes * 60L + (INT32U)seconds) * OS_TICKS_PER_SEC
+ OS_TICKS_PER_SEC * ((INT32U)milli + 500L / OS_TICKS_PER_SEC) / 1000L;
loops = (INT16U)(ticks / 65536L); /* Compute the integral number of 65536 tick delays */
ticks = ticks % 65536L; /* Obtain the fractional number of ticks */
OSTimeDly((INT16U)ticks);
while (loops > 0) {
OSTimeDly(32768);
OSTimeDly(32768);
loops--;
}
return (OS_NO_ERR);
}
return (OS_TIME_ZERO_DLY);
}
#endif
/*
*********************************************************************************************************
* RESUME A DELAYED TASK
*
* Description: This function is used resume a task that has been delayed through a call to either
* OSTimeDly() or OSTimeDlyHMSM(). Note that you MUST NOT call this function to resume a
* task that is waiting for an event with timeout. This situation would make the task look
* like a timeout occurred (unless you desire this effect). Also, you cannot resume a task
* that has called OSTimeDlyHMSM() with a combined time that exceeds 65535 clock ticks. In
* other words, if the clock tick runs at 100 Hz then, you will not be able to resume a
* delayed task that called OSTimeDlyHMSM(0, 10, 55, 350) or higher.
*
* (10 Minutes * 60 + 55 Seconds + 0.35) * 100 ticks/second.
*
* Arguments : prio specifies the priority of the task to resume
*
* Returns : OS_NO_ERR Task has been resumed
* OS_PRIO_INVALID if the priority you specify is higher that the maximum allowed
* (i.e. >= OS_LOWEST_PRIO)
* OS_TIME_NOT_DLY Task is not waiting for time to expire
* OS_TASK_NOT_EXIST The desired task has not been created
*********************************************************************************************************
*/
#if OS_TIME_DLY_RESUME_EN > 0
INT8U OSTimeDlyResume (INT8U prio)
{
#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr;
#endif
OS_TCB *ptcb;
if (prio >= OS_LOWEST_PRIO) {
return (OS_PRIO_INVALID);
}
OS_ENTER_CRITICAL();
ptcb = (OS_TCB *)OSTCBPrioTbl[prio]; /* Make sure that task exist */
if (ptcb != (OS_TCB *)0) {
if (ptcb->OSTCBDly != 0) { /* See if task is delayed */
ptcb->OSTCBDly = 0; /* Clear the time delay */
if ((ptcb->OSTCBStat & OS_STAT_SUSPEND) == OS_STAT_RDY) { /* See if task is ready to run */
OSRdyGrp |= ptcb->OSTCBBitY; /* Make task ready to run */
OSRdyTbl[ptcb->OSTCBY] |= ptcb->OSTCBBitX;
OS_EXIT_CRITICAL();
OS_Sched(); /* See if this is new highest priority */
} else {
OS_EXIT_CRITICAL(); /* Task may be suspended */
}
return (OS_NO_ERR);
} else {
OS_EXIT_CRITICAL();
return (OS_TIME_NOT_DLY); /* Indicate that task was not delayed */
}
}
OS_EXIT_CRITICAL();
return (OS_TASK_NOT_EXIST); /* The task does not exist */
}
#endif
/*
*********************************************************************************************************
* GET CURRENT SYSTEM TIME
*
* Description: This function is used by your application to obtain the current value of the 32-bit
* counter which keeps track of the number of clock ticks.
*
* Arguments : none
*
* Returns : The current value of OSTime
*********************************************************************************************************
*/
#if OS_TIME_GET_SET_EN > 0
INT32U OSTimeGet (void)
{
#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr;
#endif
INT32U ticks;
OS_ENTER_CRITICAL();
ticks = OSTime;
OS_EXIT_CRITICAL();
return (ticks);
}
#endif
/*
*********************************************************************************************************
* SET SYSTEM CLOCK
*
* Description: This function sets the 32-bit counter which keeps track of the number of clock ticks.
*
* Arguments : ticks specifies the new value that OSTime needs to take.
*
* Returns : none
*********************************************************************************************************
*/
#if OS_TIME_GET_SET_EN > 0
void OSTimeSet (INT32U ticks)
{
#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr;
#endif
OS_ENTER_CRITICAL();
OSTime = ticks;
OS_EXIT_CRITICAL();
}
#endif
//////////////////////////////////////////////////////////////OS_TASK.C/////////////////////////////////////////////////
/*
*********************************************************************************************************
* uC/OS-II
* The Real-Time Kernel
* TASK MANAGEMENT
*
* (c) Copyright 1992-2002, Jean J. Labrosse, Weston, FL
* All Rights Reserved
*
* File : OS_TASK.C
* By : Jean J. Labrosse
*********************************************************************************************************
*********************************************************************************************************
* CHANGE PRIORITY OF A TASK
*
* Description: This function allows you to change the priority of a task dynamically. Note that the new
* priority MUST be available.
*
* Arguments : oldp is the old priority
*
* newp is the new priority
*
* Returns : OS_NO_ERR is the call was successful
* OS_PRIO_INVALID if the priority you specify is higher that the maximum allowed
* (i.e. >= OS_LOWEST_PRIO)
* OS_PRIO_EXIST if the new priority already exist.
* OS_PRIO_ERR there is no task with the specified OLD priority (i.e. the OLD task does
* not exist.
*********************************************************************************************************
*/
#if OS_TASK_CHANGE_PRIO_EN > 0
INT8U OSTaskChangePrio (INT8U oldprio, INT8U newprio)
{
#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr;
#endif
#if OS_EVENT_EN > 0
OS_EVENT *pevent;
#endif
OS_TCB *ptcb;
INT8U x;
INT8U y;
INT8U bitx;
INT8U bity;
#if OS_ARG_CHK_EN > 0
if ((oldprio >= OS_LOWEST_PRIO && oldprio != OS_PRIO_SELF) ||
newprio >= OS_LOWEST_PRIO) {
return (OS_PRIO_INVALID);
}
#endif
OS_ENTER_CRITICAL();
if (OSTCBPrioTbl[newprio] != (OS_TCB *)0) { /* New priority must not already exist */
OS_EXIT_CRITICAL();
return (OS_PRIO_EXIST);
} else {
OSTCBPrioTbl[newprio] = (OS_TCB *)1; /* Reserve the entry to prevent others */
OS_EXIT_CRITICAL();
y = newprio >> 3; /* Precompute to reduce INT. latency */
bity = OSMapTbl[y];
x = newprio & 0x07;
bitx = OSMapTbl[x];
OS_ENTER_CRITICAL();
if (oldprio == OS_PRIO_SELF) { /* See if changing self */
oldprio = OSTCBCur->OSTCBPrio; /* Yes, get priority */
}
ptcb = OSTCBPrioTbl[oldprio];
if (ptcb != (OS_TCB *)0) { /* Task to change must exist */
OSTCBPrioTbl[oldprio] = (OS_TCB *)0; /* Remove TCB from old priority */
if ((OSRdyTbl[ptcb->OSTCBY] & ptcb->OSTCBBitX) != 0x00) { /* If task is ready make it not */
if ((OSRdyTbl[ptcb->OSTCBY] &= ~ptcb->OSTCBBitX) == 0x00) {
OSRdyGrp &= ~ptcb->OSTCBBitY;
}
OSRdyGrp |= bity; /* Make new priority ready to run */
OSRdyTbl[y] |= bitx;
#if OS_EVENT_EN > 0
} else {
pevent = ptcb->OSTCBEventPtr;
if (pevent != (OS_EVENT *)0) { /* Remove from event wait list */
if ((pevent->OSEventTbl[ptcb->OSTCBY] &= ~ptcb->OSTCBBitX) == 0) {
pevent->OSEventGrp &= ~ptcb->OSTCBBitY;
}
pevent->OSEventGrp |= bity; /* Add new priority to wait list */
pevent->OSEventTbl[y] |= bitx;
}
#endif
}
OSTCBPrioTbl[newprio] = ptcb; /* Place pointer to TCB @ new priority */
ptcb->OSTCBPrio = newprio; /* Set new task priority */
ptcb->OSTCBY = y;
ptcb->OSTCBX = x;
ptcb->OSTCBBitY = bity;
ptcb->OSTCBBitX = bitx;
OS_EXIT_CRITICAL();
OS_Sched(); /* Run highest priority task ready */
return (OS_NO_ERR);
} else {
OSTCBPrioTbl[newprio] = (OS_TCB *)0; /* Release the reserved prio. */
OS_EXIT_CRITICAL();
return (OS_PRIO_ERR); /* Task to change didn't exist */
}
}
}
#endif
/*
*********************************************************************************************************
* CREATE A TASK
*
* Description: This function is used to have uC/OS-II manage the execution of a task. Tasks can either
* be created prior to the start of multitasking or by a running task. A task cannot be
* created by an ISR.
*
* Arguments : task is a pointer to the task's code
*
* pdata is a pointer to an optional data area which can be used to pass parameters to
* the task when the task first executes. Where the task is concerned it thinks
* it was invoked and passed the argument 'pdata' as follows:
*
* ⌨️ 快捷键说明
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