📄 os_tmr.lst
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436 * FIND OUT WHAT STATE A TIMER IS IN
437 *
438 * Description: This function is called to determine what state the timer is in:
439 *
C51 COMPILER V7.50 OS_TMR 12/14/2007 08:25:46 PAGE 9
440 * OS_TMR_STATE_UNUSED the timer has not been created
441 * OS_TMR_STATE_STOPPED the timer has been created but has not been started or has been
- stopped
442 * OS_TMR_COMPLETED the timer is in ONE-SHOT mode and has completed it's timeout
443 * OS_TMR_RUNNING the timer is currently running
444 *
445 * Arguments : ptmr Is a pointer to the desired timer
446 *
447 * perr Is a pointer to an error code. '*perr' will contain one of the following:
448 * OS_ERR_NONE
449 * OS_ERR_TMR_INVALID 'ptmr' is a NULL pointer
450 * OS_ERR_TMR_INVALID_TYPE 'ptmr' is not pointing to an OS_TMR
451 * OS_ERR_TMR_ISR if the call was made from an ISR
452 * OS_ERR_TMR_INACTIVE 'ptmr' points to a timer that is not active
453 * OS_ERR_TMR_INVALID_STATE if the timer is not in a valid state
454 *
455 * Returns : The current state of the timer (see description).
456 **********************************************************************************************************
-**************
457 */
458
459 #if OS_TMR_EN > 0
INT8U OSTmrStateGet (OS_TMR *ptmr,
INT8U *perr) reentrant
{
INT8U state;
#if OS_ARG_CHK_EN > 0
if (perr == (INT8U *)0) {
return (0);
}
if (ptmr == (OS_TMR *)0) {
*perr = OS_ERR_TMR_INVALID;
return (0);
}
#endif
if (ptmr->OSTmrType != OS_TMR_TYPE) { /* Validate timer structure
- */
*perr = OS_ERR_TMR_INVALID_TYPE;
return (0);
}
if (OSIntNesting > 0) { /* See if trying to call from an ISR
- */
*perr = OS_ERR_TMR_ISR;
return (0);
}
OSTmr_Lock();
state = ptmr->OSTmrState;
switch (state) {
case OS_TMR_STATE_UNUSED:
case OS_TMR_STATE_STOPPED:
case OS_TMR_STATE_COMPLETED:
case OS_TMR_STATE_RUNNING:
*perr = OS_ERR_NONE;
break;
default:
*perr = OS_ERR_TMR_INVALID_STATE;
break;
}
OSTmr_Unlock();
C51 COMPILER V7.50 OS_TMR 12/14/2007 08:25:46 PAGE 10
return (state);
}
#endif
501
502 /*$PAGE*/
503 /*
504 **********************************************************************************************************
-**************
505 * START A TIMER
506 *
507 * Description: This function is called by your application code to start a timer.
508 *
509 * Arguments : ptmr Is a pointer to an OS_TMR
510 *
511 * perr Is a pointer to an error code. '*perr' will contain one of the following:
512 * OS_ERR_NONE
513 * OS_ERR_TMR_INVALID
514 * OS_ERR_TMR_INVALID_TYPE 'ptmr' is not pointing to an OS_TMR
515 * OS_ERR_TMR_ISR if the call was made from an ISR
516 * OS_ERR_TMR_INACTIVE if the timer was not created
517 * OS_ERR_TMR_INVALID_STATE the timer is in an invalid state
518 *
519 * Returns : OS_TRUE if the timer was started
520 * OS_FALSE if an error was detected
521 **********************************************************************************************************
-**************
522 */
523
524 #if OS_TMR_EN > 0
BOOLEAN OSTmrStart (OS_TMR *ptmr,
INT8U *perr) reentrant
{
#if OS_ARG_CHK_EN > 0
if (perr == (INT8U *)0) { /* Validate arguments
- */
return (OS_FALSE);
}
if (ptmr == (OS_TMR *)0) {
*perr = OS_ERR_TMR_INVALID;
return (OS_FALSE);
}
#endif
if (ptmr->OSTmrType != OS_TMR_TYPE) { /* Validate timer structure
- */
*perr = OS_ERR_TMR_INVALID_TYPE;
return (OS_FALSE);
}
if (OSIntNesting > 0) { /* See if trying to call from an ISR
- */
*perr = OS_ERR_TMR_ISR;
return (OS_FALSE);
}
OSTmr_Lock();
switch (ptmr->OSTmrState) {
case OS_TMR_STATE_RUNNING: /* Restart the timer
- */
OSTmr_Unlink(ptmr); /* ... Stop the timer
- */
OSTmr_Link(ptmr, OS_TMR_LINK_DLY); /* ... Link timer to timer wheel
- */
OSTmr_Unlock();
*perr = OS_ERR_NONE;
C51 COMPILER V7.50 OS_TMR 12/14/2007 08:25:46 PAGE 11
return (OS_TRUE);
case OS_TMR_STATE_STOPPED: /* Start the timer
- */
case OS_TMR_STATE_COMPLETED:
OSTmr_Link(ptmr, OS_TMR_LINK_DLY); /* ... Link timer to timer wheel
- */
OSTmr_Unlock();
*perr = OS_ERR_NONE;
return (OS_TRUE);
case OS_TMR_STATE_UNUSED: /* Timer not created
- */
OSTmr_Unlock();
*perr = OS_ERR_TMR_INACTIVE;
return (OS_FALSE);
default:
OSTmr_Unlock();
*perr = OS_ERR_TMR_INVALID_STATE;
return (OS_FALSE);
}
}
#endif
573
574 /*$PAGE*/
575 /*
576 **********************************************************************************************************
-**************
577 * STOP A TIMER
578 *
579 * Description: This function is called by your application code to stop a timer.
580 *
581 * Arguments : ptmr Is a pointer to the timer to stop.
582 *
583 * opt Allows you to specify an option to this functions which can be:
584 *
585 * OS_TMR_OPT_NONE Do nothing special but stop the timer
586 * OS_TMR_OPT_CALLBACK Execute the callback function, pass it the callba
-ck argument
587 * specified when the timer was created.
588 * OS_TMR_OPT_CALLBACK_ARG Execute the callback function, pass it the callba
-ck argument
589 * specified in THIS function call
590 *
591 * callback_arg Is a pointer to a 'new' callback argument that can be passed to the callback
-function
592 * instead of the timer's callback argument. In other words, use 'callback_a
-rg' passed in
593 * THIS function INSTEAD of ptmr->OSTmrCallbackArg
594 *
595 * perr Is a pointer to an error code. '*perr' will contain one of the following:
596 * OS_ERR_NONE
597 * OS_ERR_TMR_INVALID 'ptmr' is a NULL pointer
598 * OS_ERR_TMR_INVALID_TYPE 'ptmr' is not pointing to an OS_TMR
599 * OS_ERR_TMR_ISR if the function was called from an ISR
600 * OS_ERR_TMR_INACTIVE if the timer was not created
601 * OS_ERR_TMR_INVALID_OPT if you specified an invalid option for 'opt'
602 * OS_ERR_TMR_STOPPED if the timer was already stopped
603 * OS_ERR_TMR_INVALID_STATE the timer is in an invalid state
604 * OS_ERR_TMR_NO_CALLBACK if the timer does not have a callback function
-defined
C51 COMPILER V7.50 OS_TMR 12/14/2007 08:25:46 PAGE 12
605 *
606 * Returns : OS_TRUE If we stopped the timer (if the timer is already stopped, we also return OS_T
-RUE)
607 * OS_FALSE If not
608 **********************************************************************************************************
-**************
609 */
610
611 #if OS_TMR_EN > 0
BOOLEAN OSTmrStop (OS_TMR *ptmr,
INT8U opt,
void *callback_arg,
INT8U *perr) reentrant
{
OS_TMR_CALLBACK pfnct;
#if OS_ARG_CHK_EN > 0
if (perr == (INT8U *)0) { /* Validate arguments
- */
return (OS_FALSE);
}
if (ptmr == (OS_TMR *)0) {
*perr = OS_ERR_TMR_INVALID;
return (OS_FALSE);
}
#endif
if (ptmr->OSTmrType != OS_TMR_TYPE) { /* Validate timer structure
- */
*perr = OS_ERR_TMR_INVALID_TYPE;
return (OS_FALSE);
}
if (OSIntNesting > 0) { /* See if trying to call from an ISR
- */
*perr = OS_ERR_TMR_ISR;
return (OS_FALSE);
}
OSTmr_Lock();
switch (ptmr->OSTmrState) {
case OS_TMR_STATE_RUNNING:
OSTmr_Unlink(ptmr); /* Remove from current wheel spoke
- */
*perr = OS_ERR_NONE;
switch (opt) {
case OS_TMR_OPT_CALLBACK:
pfnct = ptmr->OSTmrCallback; /* Execute callback function if availabl
-e ... */
/* simon delete for pass compiling */
#if 0
if (pfnct != (OS_TMR_CALLBACK)0) {
(*pfnct)((void *)ptmr, ptmr->OSTmrCallbackArg); /* Use callback arg when timer
-was created */
} else {
*perr = OS_ERR_TMR_NO_CALLBACK;
}
#endif
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