/**
* @brief Selects timer clock source
*
* This function selects the clock source of the timer.
*
* @param source
* - @ref TMR_CLK_SRC_DURING_TRX_SLEEP if clock source during sleep is to be selected, and
* - @ref TMR_CLK_SRC_DURING_TRX_AWAKE if clock source while being awake is selected.
*/
void pal_timer_source_select(source_type_t source)
{
if (TMR_CLK_SRC_DURING_TRX_SLEEP == source)
{
TIMER_SRC_DURING_TRX_SLEEP();
}
else
{
TIMER_SRC_DURING_TRX_AWAKE();
}
}
/*
* This function is called by timer_init() to perform the non-generic portion
* of the initialization of the timer module.
*/
void timer_init_non_generic(void)
{
/* Select proper clock as timer clock source when radio is sleeping */
TIMER_SRC_DURING_TRX_SLEEP();
/*
* Clear pending output compare matches of all the OCR1A, OCR1B and
* OCR1C.
*/
TIFR1 = _BV(OCF1A);
TIFR1 = _BV(OCF1B);
TIFR1 = _BV(OCF1C);
/* Enable the timer overflow interrupt */
TIMSK1 |= _BV(TOIE1);
}
/*
* This function is called by timer_init() to perform the non-generic portion
* of the initialization of the timer module.
*
* sys_clk = 16MHz -> Will be used as source for Event Channel 0 with Prescaler 16
*
* Timer usage
* TCC0_CCA: Systime (software timer based on compare match)
* TCC1_CCA: Input capture for time stamping
*/
void timer_init_non_generic(void)
{
/* Select proper clock as timer clock source when radio is sleeping */
TIMER_SRC_DURING_TRX_SLEEP();
/*
* Clear pending output compare matches of all.
*/
TCC0_INTFLAGS = TC0_CCAIF_bm | TC0_CCBIF_bm | TC0_CCCIF_bm | TC0_CCDIF_bm;
TCC1_INTFLAGS = TC1_CCAIF_bm | TC1_CCBIF_bm;
/* Enable the timer overflow interrupt for TCC0 used for systime overflow. */
TCC0_INTCTRLA = TC_OVFINTLVL_HI_gc;
/* Assign event channel 1 as input capture to TCC1_CCA */
TCC1_CTRLB |= TC1_CCAEN_bm;
TCC1_CTRLD = TC1_EVACT0_bm | TC1_EVSEL3_bm | TC1_EVSEL0_bm;
}
