/**************************************************************************************************
* @fn macBackoffTimerInit
*
* @brief Intializes backoff timer.
*
* @param none
*
* @return none
**************************************************************************************************
*/
void macBackoffTimerInit(void)
{
compareState = COMPARE_STATE_ROLLOVER;
MAC_RADIO_BACKOFF_SET_COUNT(0);
macBackoffTimerSetRollover(MAC_BACKOFF_TIMER_DEFAULT_ROLLOVER);
MAC_RADIO_BACKOFF_COMPARE_CLEAR_INTERRUPT();
MAC_RADIO_BACKOFF_COMPARE_ENABLE_INTERRUPT();
}
/**************************************************************************************************
* @fn macBackoffTimerInit
*
* @brief Intializes backoff timer.
*
* @param none
*
* @return none
**************************************************************************************************
*/
MAC_INTERNAL_API void macBackoffTimerInit(void)
{
MAC_RADIO_BACKOFF_SET_COUNT(0);
macBackoffTimerSetRollover(MAC_BACKOFF_TIMER_DEFAULT_NONBEACON_ROLLOVER);
MAC_RADIO_BACKOFF_PERIOD_CLEAR_INTERRUPT();
MAC_RADIO_BACKOFF_PERIOD_ENABLE_INTERRUPT();
MAC_RADIO_BACKOFF_COMPARE_CLEAR_INTERRUPT();
MAC_RADIO_BACKOFF_COMPARE_ENABLE_INTERRUPT();
}
/**************************************************************************************************
* @fn macBackoffTimerInit
*
* @brief Intializes backoff timer.
*
* @param none
*
* @return none
**************************************************************************************************
*/
MAC_INTERNAL_API void macBackoffTimerInit(void)
{
macPrevPeriodRatCount = macBackoffTimerRollover = 0;
/* backoffTimerTrigger has to be set to maximum possible value of
* macBackoffTimerRollover value initially.
* Otherwise, incorrect backoffTimerTrigger value shall be compared
* all the time in macBackoffTimerUpdateWakeup() function, casting
* incorrect vote.
*/
backoffTimerTrigger = MAC_BACKOFF_TIMER_DEFAULT_NONBEACON_ROLLOVER;
MAC_RADIO_CLEAR_BACKOFF_COUNT();
#if defined USE_ICALL || defined OSAL_PORT2TIRTOS
// Clear events
macBackoffTimerEvents = 0;
#ifdef USE_ICALL
// Register hook function to handle events.
if (!osal_eventloop_hook)
{
/* Don't overwrite if the hook is already set up.
* Note that the hook might have been set up to perform other things
* as well in which case the other hook function has to call
* macBackoffTimerEventHandler.
*/
osal_eventloop_hook = macBackoffTimerEventHandler;
}
#endif /* USE_ICALL */
macBackoffTimerImpending = FALSE;
#ifdef USE_ICALL
/* Start timer just to initialize the timer ID to reuse in the module.
* This also serves the purpose of allocating resources upfront,
* in order to prevent a case of running out of timer resource
* when the timer has to be started.
* Note that macBackoffTimerSetRollover() may trigger setting timer
* and hence the timer set up must happen before macBackoffTimerSetRollover()
* call. */
if (ICall_setTimer(1, macBackoffTimerICallTimerCback, NULL,
&macBackoffTimerICallTimerID) != ICALL_ERRNO_SUCCESS)
{
MAC_ASSERT(0);
}
#endif /* USE_ICALL */
#ifdef OSAL_PORT2TIRTOS
if (!macBackoffWakeupClock)
{
/* Creates a wakeup clock */
Clock_Params params;
Clock_Params_init(¶ms);
params.startFlag = FALSE;
params.period = 0;
macBackoffWakeupClock =
Clock_create((Clock_FuncPtr) macBackoffTimerICallTimerCback,
1, ¶ms, NULL);
MAC_ASSERT(macBackoffWakeupClock);
/* No need to stop clock, the clock event will reprogram next wake time */
}
#endif /* OSAL_PORT2TIRTOS */
/* Note that macPwrVote() is called done from macBackoffTimerSetRollover()
* call and hence there is no need to make the call here. */
#endif /* defined USE_ICALL || defined OSAL_PORT2TIRTOS */
macBackoffTimerSetRollover(MAC_BACKOFF_TIMER_DEFAULT_NONBEACON_ROLLOVER);
/* Since interrupt disable/enable mechanism is not implemented for backoff
* timer trigger interrupt for CC26xx, comparator value has to be set
* so that the timer trigger interrupt is not triggered.
* See comment inside macBackoffTimerCancelTrigger() for relevant
* information */
MAC_RADIO_BACKOFF_SET_COMPARE(backoffTimerTrigger);
}
