void lp_ticker_init()
{
core_util_critical_section_enter();
if (!rtc_inited) {
CMU_ClockEnable(cmuClock_RTC, true);
/* Initialize RTC */
RTC_Init_TypeDef init = RTC_INIT_DEFAULT;
init.enable = 1;
/* Don't use compare register 0 as top value */
init.comp0Top = 0;
/* Initialize */
RTC_Init(&init);
RTC_CounterSet(20);
/* Enable Interrupt from RTC */
RTC_IntDisable(RTC_IF_COMP0);
RTC_IntClear(RTC_IF_COMP0);
NVIC_SetVector(RTC_IRQn, (uint32_t)RTC_IRQHandler);
NVIC_EnableIRQ(RTC_IRQn);
rtc_inited = true;
} else {
/* Cancel current interrupt by virtue of calling init again */
RTC_IntDisable(RTC_IF_COMP0);
RTC_IntClear(RTC_IF_COMP0);
}
core_util_critical_section_exit();
}
void rtt_clear_overflow_cb(void)
{
rtt_state.overflow_cb = NULL;
rtt_state.overflow_arg = NULL;
RTC_IntDisable(RTC_IEN_OF);
}
/***************************************************************************//**
* @brief
* Enables LFACLK and selects LFXO as clock source for RTC
*
* @param osc
* Oscillator
******************************************************************************/
void RTC_Setup(CMU_Select_TypeDef osc)
{
RTC_Init_TypeDef init;
rtcInitialized = 1;
/* Ensure LE modules are accessible */
CMU_ClockEnable(cmuClock_CORELE, true);
/* Enable osc as LFACLK in CMU (will also enable oscillator if not enabled) */
CMU_ClockSelectSet(cmuClock_LFA, osc);
/* Use a 32 division prescaler to reduce power consumption. */
CMU_ClockDivSet(cmuClock_RTC, cmuClkDiv_32);
rtcFreq = CMU_ClockFreqGet(cmuClock_RTC);
/* Enable clock to RTC module */
CMU_ClockEnable(cmuClock_RTC, true);
init.enable = false;
init.debugRun = false;
init.comp0Top = false; /* Count to max before wrapping */
RTC_Init(&init);
/* Disable interrupt generation from RTC0 */
RTC_IntDisable(_RTC_IF_MASK);
/* Enable interrupts */
NVIC_ClearPendingIRQ(RTC_IRQn);
NVIC_EnableIRQ(RTC_IRQn);
}
/***************************************************************************//**
* @brief Enables LFACLK and selects LFRCO as clock source for RTC
******************************************************************************/
static void RTC_Setup(void)
{
RTC_Init_TypeDef init;
rtcInitialized = 1;
/* Ensure LE modules are accessible */
CMU_ClockEnable(cmuClock_CORELE, true);
/* Enable LFRCO as LFACLK in CMU (will also enable oscillator if not enabled) */
CMU_ClockSelectSet(cmuClock_LFA, cmuSelect_LFRCO);
/* Enable clock to RTC module */
CMU_ClockEnable(cmuClock_RTC, true);
init.enable = false;
init.debugRun = false;
init.comp0Top = false; /* Count to max before wrapping */
RTC_Init(&init);
/* Disable interrupt generation from RTC0 */
RTC_IntDisable(_RTC_IF_MASK);
/* Enable interrupts */
NVIC_ClearPendingIRQ(RTC_IRQn);
NVIC_EnableIRQ(RTC_IRQn);
}
/**
* Initialize RTC Based on Crystal Oscillator
*/
void rtc_crystal_init(void)
{
RTC_Init_TypeDef init;
/* Ensure LE modules are accessible */
CMU_ClockEnable(cmuClock_CORELE, true);
/* Enable LFACLK in CMU (will also enable oscillator if not enabled) */
CMU_ClockSelectSet(cmuClock_LFA, cmuSelect_LFXO);
/* Use the prescaler to reduce power consumption. */
CMU_ClockDivSet(cmuClock_RTC, RTC_PRESCALE);
/* Enable clock to RTC module */
CMU_ClockEnable(cmuClock_RTC, true);
init.enable = false; /* Start disabled to reset counter */
init.debugRun = false;
init.comp0Top = false; /* Count to max before wrapping */
RTC_Init(&init);
/* Disable interrupt generation from RTC0 */
RTC_IntDisable(_RTC_IF_MASK);
/* Enable interrupts */
NVIC_ClearPendingIRQ(RTC_IRQn);
NVIC_EnableIRQ(RTC_IRQn);
/* Start RTC counter */
RTC_Enable(true);
}
/*---------------------------------------------------------------------------*/
void
rtimer_arch_init(void)
{
RTC_Init_TypeDef init = RTC_INIT_DEFAULT;
/* Ensure LE modules are accessible */
CMU_ClockEnable(cmuClock_CORELE, true);
/* Enable LFACLK in CMU (will also enable oscillator if not enabled) */
CMU_ClockSelectSet(cmuClock_LFA, cmuSelect_LFXO);
/* Don't use prescaler to have highest precision */
CMU_ClockDivSet(cmuClock_RTC, cmuClkDiv_1);
/* Enable clock to RTC module */
CMU_ClockEnable(cmuClock_RTC, true);
init.enable = false; /* Start disabled to reset counter */
init.debugRun = false;
init.comp0Top = false; /* Don't Reset Count on comp0 */
RTC_Init(&init);
/* Disable interrupt generation from RTC0 */
RTC_IntDisable(_RTC_IF_MASK);
/* Enable interrupts */
NVIC_ClearPendingIRQ(RTC_IRQn);
NVIC_EnableIRQ(RTC_IRQn);
/* Start RTC counter */
RTC_Enable(true);
}
/***************************************************************************//**
* @brief Enables LFACLK and selects osc as clock source for RTC
******************************************************************************/
void RTC_Setup(CMU_Select_TypeDef osc)
{
RTC_Init_TypeDef init;
/* Ensure LE modules are accessible */
CMU_ClockEnable(cmuClock_CORELE, true);
/* Enable osc as LFACLK in CMU (will also enable oscillator if not enabled) */
CMU_ClockSelectSet(cmuClock_LFA, osc);
/* No division prescaler to increase accuracy. */
CMU_ClockDivSet(cmuClock_RTC, cmuClkDiv_1);
/* Enable clock to RTC module */
CMU_ClockEnable(cmuClock_RTC, true);
init.enable = false;
init.debugRun = false;
init.comp0Top = true; /* Count only to top before wrapping */
RTC_Init(&init);
RTC_CompareSet(0, ((LFRCOFREQ * WAKEUP_US) / 1000000));
/* Disable interrupt generation from RTC0, is enabled before each sample-run. */
RTC_IntDisable(_RTC_IF_MASK);
/* Enable interrupts in NVIC */
NVIC_ClearPendingIRQ(RTC_IRQn);
NVIC_EnableIRQ(RTC_IRQn);
}
void RTC_IRQHandler(void)
{
// Check to see which counter has triggered
if (RTC->IF & RTC_IF_COMP0)
{
// Within 10 seconds allows us to speed up the clock for testing
if ((RTC->CNT - time_keeper.timer_start_seconds) < 10)
{
run_sprinkler();
RTC_CompareSet(0, time_keeper.timer_stop_seconds);
}
else
{
RTC_IntDisable(0);
stop_sprinkler();
}
RTC_IntClear(RTC_IFC_COMP0);
}
else // A minute update has occurred
{
if (RTC->CNT >= END_OF_DAY)
{
RTC->CNT = 0;
}
RTC_CompareSet(1, RTC->CNT + 60);
RTC_IntClear(RTC_IFC_COMP1);
display_hours = get_time(HOURS);
display_minutes = get_time(MINUTES);
display_time(display_hours, display_minutes);
}
}
void os_idle_demon(void)
{
RTC_Init_TypeDef init;
unsigned int sleep;
/* The idle demon is a system thread, running when no other thread is */
/* ready to run. */
/* Enable system clock for RTC */
/* LFXO setup */
/* Use 70% boost */
CMU->CTRL = (CMU->CTRL & ~_CMU_CTRL_LFXOBOOST_MASK) | CMU_CTRL_LFXOBOOST_70PCENT;
/* Ensure LE modules are accessible */
CMU_ClockEnable(cmuClock_CORELE, true);
/* Enable osc as LFACLK in CMU (will also enable oscillator if not enabled) */
CMU_ClockSelectSet(cmuClock_LFA, cmuSelect_LFXO);
/* Use a 32 division prescaler to reduce power consumption. */
CMU_ClockDivSet(cmuClock_RTC, cmuClkDiv_32);
/* Enable clock to RTC module */
CMU_ClockEnable(cmuClock_RTC, true);
init.enable = false;
init.debugRun = false;
init.comp0Top = false; /* Count to max value before wrapping */
RTC_Init(&init);
/* Disable interrupt generation from RTC0 */
RTC_IntDisable(_RTC_IF_MASK);
/* Enable interrupts */
NVIC_ClearPendingIRQ(RTC_IRQn);
NVIC_EnableIRQ(RTC_IRQn);
for (;;)
{
/* os_suspend stops scheduler and returns time to next event in OS_TICK units */
sleep = os_suspend();
if (sleep)
{
RTC_CompareSet(0, sleep - 1);
RTC_IntClear(RTC_IFC_COMP0);
RTC_IntEnable(RTC_IF_COMP0);
RTC_CounterReset();
/* Enter EM2 low power mode - could be replaced with EM1 if required */
EMU_EnterEM2(true);
/* get information how long we were in sleep */
sleep = RTC_CounterGet();
RTC_Enable(false);
};
/* resume scheduler providing information how long MCU was sleeping */
os_resume(sleep);
}
}
void rtt_clear_alarm(void)
{
rtt_state.alarm_cb = NULL;
rtt_state.alarm_arg = NULL;
/* disable the interrupt */
RTC_IntDisable(RTC_IEN_COMP0);
}
void lp_ticker_set_interrupt(timestamp_t timestamp)
{
RTC_IntDisable(RTC_IF_COMP0);
RTC_IntClear(RTC_IF_COMP0);
RTC_FreezeEnable(true);
RTC_CompareSet(0, (uint32_t) (timestamp & RTC_MAX_VALUE));
RTC_FreezeEnable(false);
RTC_IntEnable(RTC_IF_COMP0);
}
/**************************************************************************//**
* @brief vPortSetupTimerInterrupt
* Override the default definition of vPortSetupTimerInterrupt() that is weakly
* defined in the FreeRTOS Cortex-M3, which set source of system tick interrupt
*****************************************************************************/
void vPortSetupTimerInterrupt(void)
{
/* Set our data about timer used as system ticks*/
ulTimerReloadValueForOneTick = SYSTICK_LOAD_VALUE ;
#if (configUSE_TICKLESS_IDLE == 1)
xMaximumPossibleSuppressedTicks = TIMER_CAPACITY / (SYSTICK_LOAD_VALUE);
ulStoppedTimerCompensation = TIMER_COMPENSATION / (configCPU_CLOCK_HZ / configSYSTICK_CLOCK_HZ);
#endif /* (configUSE_TICKLESS_IDLE == 1) */
/* Configure RTC as system tick source */
/* Structure of RTC init */
RTC_Init_TypeDef init;
#if (configCRYSTAL_IN_EM2 == 1)
/* LFXO setup */
/* For cut D, use 70% boost */
CMU->CTRL = (CMU->CTRL & ~_CMU_CTRL_LFXOBOOST_MASK) | CMU_CTRL_LFXOBOOST_70PCENT;
#if defined( EMU_AUXCTRL_REDLFXOBOOST )
EMU->AUXCTRL = (EMU->AUXCTRL & ~_EMU_AUXCTRL_REDLFXOBOOST_MASK) | EMU_AUXCTRL_REDLFXOBOOST;
#endif
#else
/* RC oscillator */
CMU_OscillatorEnable(cmuOsc_LFRCO, true, true);
#endif
/* Ensure LE modules are accessible */
CMU_ClockEnable(cmuClock_CORELE, true);
#if (configCRYSTAL_IN_EM2 == 1)
/* Enable osc as LFACLK in CMU (will also enable oscillator if not enabled) */
CMU_ClockSelectSet(cmuClock_LFA, cmuSelect_LFXO);
#else
/* Enable osc as LFACLK in CMU (will also enable oscillator if not enabled) */
CMU_ClockSelectSet(cmuClock_LFA, cmuSelect_LFRCO);
#endif
/* Set 2 times divider to reduce energy*/
CMU_ClockDivSet(cmuClock_RTC, cmuClkDiv_2);
/* Enable clock to RTC module */
CMU_ClockEnable(cmuClock_RTC, true);
init.enable = false;
init.debugRun = false;
init.comp0Top = false; /* Count to max value before wrapping */
/* Initialization of RTC */
RTC_Init(&init);
/* Disable interrupt generation from RTC0 */
RTC_IntDisable(RTC_IFC_COMP0);
/* Tick interrupt MUST execute at the lowest interrupt priority. */
NVIC_SetPriority(RTC_IRQn, 255);
/* Enable interrupts */
NVIC_ClearPendingIRQ(RTC_IRQn);
NVIC_EnableIRQ(RTC_IRQn);
RTC_CompareSet(0, SYSTICK_LOAD_VALUE);
RTC_IntClear(RTC_IFC_COMP0);
RTC_IntEnable(RTC_IF_COMP0);
RTC_Enable(true);
//RTC_CounterReset();
}
error_t hw_timer_cancel(hwtimer_id_t timer_id)
{
if(timer_id >= HWTIMER_NUM)
return ESIZE;
if(!timer_inited)
return EOFF;
start_atomic();
RTC_IntDisable(RTC_IEN_COMP1);
RTC_IntClear(RTC_IEN_COMP1);
end_atomic();
}
/**************************************************************************//**
* @brief Delay function, does not depend on interrupts.
*****************************************************************************/
static void Delay( uint32_t msec )
{
/* RTC frequency is LFXO divided by 32 (prescaler) */
#define RTC_FREQ (32768 / 32)
RTC_IntDisable( RTC_IF_COMP0 );
RTC_IntClear( RTC_IF_COMP0 );
RTC_CompareSet( 0, (RTC_FREQ * msec ) / 1000 ); /* Calculate trigger value */
RTC_Enable( true );
while ( !( RTC_IntGet() & RTC_IF_COMP0 ) ); /* Wait for trigger */
RTC_Enable( false );
}
error_t hw_timer_schedule(hwtimer_id_t timer_id, hwtimer_tick_t tick )
{
if(timer_id >= HWTIMER_NUM)
return ESIZE;
if(!timer_inited)
return EOFF;
start_atomic();
RTC_IntDisable(RTC_IEN_COMP1);
RTC_CompareSet( 1, tick );
RTC_IntClear(RTC_IEN_COMP1);
RTC_IntEnable(RTC_IEN_COMP1);
end_atomic();
}
void rtt_set_alarm(uint32_t alarm, rtt_cb_t cb, void *arg)
{
rtt_state.alarm_cb = cb;
rtt_state.alarm_arg = arg;
/* disable interrupt so it doesn't accidentally trigger */
RTC_IntDisable(RTC_IEN_COMP0);
/* set compare register */
RTC_CompareSet(0, alarm & RTT_MAX_VALUE);
/* enable the interrupt */
RTC_IntClear(RTC_IFC_COMP0);
RTC_IntEnable(RTC_IEN_COMP0);
}
error_t hw_timer_counter_reset(hwtimer_id_t timer_id)
{
if(timer_id >= HWTIMER_NUM)
return ESIZE;
if(!timer_inited)
return EOFF;
start_atomic();
RTC_IntDisable(RTC_IEN_COMP0 | RTC_IEN_COMP1);
RTC_IntClear(RTC_IEN_COMP0 | RTC_IEN_COMP1);
RTC_CounterReset();
RTC_IntEnable(RTC_IEN_COMP0);
end_atomic();
}
/***************************************************************************//**
* @brief RTC Interrupt Handler, invoke callback if defined.
* The interrupt table is in assembly startup file startup_efm32.s
******************************************************************************/
void RTC_IRQHandler(void)
{
/* Disable RTC */
RTC_Enable(false);
/* Clear interrupt source */
RTC_IntClear(RTC_IF_COMP0);
/* Disable interrupt */
RTC_IntDisable(RTC_IF_COMP0);
/* Trigger callback if defined */
if (rtcCb)
{
rtcCb();
}
}
/******************************************************************************
* @brief
* Stops RTC. Turns off clocks and interrupts
*****************************************************************************/
void stopRTCTick(void)
{
RTC_Enable(false);
RTC->CNT = 0;
/* Turn off clock for RTC */
CMU_ClockEnable(cmuClock_RTC, false);
/* Disable clock to LF peripherals */
CMU_ClockEnable(cmuClock_CORELE, false);
/* Disable RTC interrupts */
NVIC_DisableIRQ(RTC_IRQn);
RTC_IntDisable(RTC_IF_COMP0);
}
/***************************************************************************//**
* @brief RTC Interrupt Handler.
******************************************************************************/
void RTC_IRQHandler(void)
{
/* Start ADC conversion as soon as we wake up. */
ADC_Start(ADC0, adcStartSingle);
/* Clear the interrupt flag */
RTC_IntClear(RTC_IF_COMP0);
/* Wait while conversion is active */
while (ADC0->STATUS & ADC_STATUS_SINGLEACT);
/* Get ADC result */
sampleBuffer[sampleCount++] = ADC_DataSingleGet(ADC0);
if(sampleCount >= N_SAMPLES){
adcFinished = 1;
RTC_Enable(false);
RTC_IntDisable(_RTC_IF_MASK);
}
}
/**************************************************************************//**
* @brief Enables LFACLK and selects LFXO as clock source for RTC.
* Sets up the RTC to count at 1024 Hz.
* The counter should not be cleared on a compare match and keep running.
* Interrupts should be cleared and enabled.
* The counter should run.
*****************************************************************************/
error_t hw_timer_init(hwtimer_id_t timer_id, uint8_t frequency, timer_callback_t compare_callback, timer_callback_t overflow_callback)
{
if(timer_id >= HWTIMER_NUM)
return ESIZE;
if(timer_inited)
return EALREADY;
if(frequency != HWTIMER_FREQ_1MS && frequency != HWTIMER_FREQ_32K)
return EINVAL;
start_atomic();
compare_f = compare_callback;
overflow_f = overflow_callback;
timer_inited = true;
/* Configuring clocks in the Clock Management Unit (CMU) */
startLfxoForRtc(frequency);
RTC_Init_TypeDef rtcInit = RTC_INIT_DEFAULT;
rtcInit.enable = false; /* Don't enable RTC after init has run */
rtcInit.comp0Top = true; /* Clear counter on compare 0 match: cmp 0 is used to limit the value of the rtc to 0xffff */
rtcInit.debugRun = false; /* Counter shall not keep running during debug halt. */
/* Initialize the RTC */
RTC_Init(&rtcInit);
//disable all rtc interrupts while we're still configuring
RTC_IntDisable(RTC_IEN_OF | RTC_IEN_COMP0 | RTC_IEN_COMP1);
RTC_IntClear(RTC_IFC_OF | RTC_IFC_COMP0 | RTC_IFC_COMP1);
//Set maximum value for the RTC
RTC_CompareSet( 0, 0x0000FFFF );
RTC_CounterReset();
RTC_IntEnable(RTC_IEN_COMP0);
NVIC_EnableIRQ(RTC_IRQn);
RTC_Enable(true);
end_atomic();
return SUCCESS;
}
void RTC_IRQHandler(void)
{
ENERGEST_ON(ENERGEST_TYPE_IRQ);
// Find reason of IRQ
if(RTC_IntGet() & RTC_IF_COMP0)
{
watchdog_start();
rtimer_run_next();
watchdog_stop();
// disable interrupt
RTC_IntDisable(RTC_IF_COMP0);
}
else
{
PRINTF("%s: unknown reason for RTC interrupt\r\n",__func__);
}
// Clear interrupts
RTC_IntClear(_RTC_IF_MASK);
ENERGEST_OFF(ENERGEST_TYPE_IRQ);
}
inline void lp_ticker_disable_interrupt()
{
RTC_IntDisable(RTC_IF_COMP0);
lp_ticker_free();
}
void lp_ticker_disable_interrupt()
{
RTC_IntDisable(RTC_IF_COMP0);
}
// Use buttons to set time, start, stop
// Stores those values to memory
void program_timer()
{
static bool initial_programming = true;
// Disable RTC interrupts while in here...
RTC_IntDisable(0);
RTC_IntDisable(1);
delay(BUTTON_DELAY);
for (int i=0; i < 3; i++)
{
if (i == 0)
{
SegmentLCD_Write("Clock");
}
else if (i == 1)
{
SegmentLCD_Write("Start");
if (initial_programming)
{
start_hours = display_hours;
start_minutes = display_minutes;
}
display_hours = start_hours;
display_minutes = start_minutes;
}
else if (i == 2)
{
SegmentLCD_Write("Stop");
if (initial_programming)
{
stop_hours = start_hours;
stop_minutes = start_minutes;
}
display_hours = stop_hours;
display_minutes = stop_minutes;
}
display_time(display_hours, display_minutes);
blink(HOURS);
delay(BUTTON_DELAY);
// Set the hours
while (!set_button.short_press)
{
if (adjust_button.short_press)
{
display_hours++;
if (display_hours > 23)
{
display_hours = 1;
}
display_time(display_hours, display_minutes);
// Delay so that we don't get double presses
delay(BUTTON_DELAY);
}
}
display_time(display_hours, display_minutes);
blink(MINUTES);
delay(BUTTON_DELAY);
// Set the minutes
while (!set_button.short_press)
{
if (adjust_button.short_press)
{
display_minutes++;
if (display_minutes > 59)
{
display_minutes = 0;
}
display_time(display_hours, display_minutes);
// Delay so that we don't get double presses
delay(FASTER_BUTTON_DELAY);
}
}
// Commit the clock hours and minutes to memory for the given index
set_clock_time(i, display_hours, display_minutes);
}
display_hours = get_time(HOURS);
display_minutes = get_time(MINUTES);
blink(NONE);
display_time(display_hours, display_minutes);
// Delay so that we don't get double presses
delay(BUTTON_DELAY);
initial_programming = false;
// Trigger interrupt every 60 seconds to update the time
RTC_CompareSet(1, RTC->CNT + 60);
// Now that programming is done, clear and enable interrupts
RTC_IntClear(RTC_IFC_COMP0);
RTC_IntClear(RTC_IFC_COMP1);
RTC_IntEnable(RTC_IFC_COMP0);
RTC_IntEnable(RTC_IFC_COMP1);
}
const hwtimer_info_t* hw_timer_get_info(hwtimer_id_t timer_id)
{
if(timer_id >= HWTIMER_NUM)
return NULL;
static const hwtimer_info_t timer_info = {
.min_delay_ticks = 0,
};
return &timer_info;
}
hwtimer_tick_t hw_timer_getvalue(hwtimer_id_t timer_id)
{
if(timer_id >= HWTIMER_NUM || (!timer_inited))
return 0;
else
{
uint32_t value =(uint16_t)(RTC->CNT & 0xFFFF);
return value;
}
}
error_t hw_timer_schedule(hwtimer_id_t timer_id, hwtimer_tick_t tick )
{
if(timer_id >= HWTIMER_NUM)
return ESIZE;
if(!timer_inited)
return EOFF;
start_atomic();
RTC_IntDisable(RTC_IEN_COMP1);
RTC_CompareSet( 1, tick );
RTC_IntClear(RTC_IEN_COMP1);
RTC_IntEnable(RTC_IEN_COMP1);
end_atomic();
}
error_t hw_timer_cancel(hwtimer_id_t timer_id)
{
if(timer_id >= HWTIMER_NUM)
return ESIZE;
if(!timer_inited)
return EOFF;
start_atomic();
RTC_IntDisable(RTC_IEN_COMP1);
RTC_IntClear(RTC_IEN_COMP1);
end_atomic();
}
error_t hw_timer_counter_reset(hwtimer_id_t timer_id)
{
if(timer_id >= HWTIMER_NUM)
return ESIZE;
if(!timer_inited)
return EOFF;
start_atomic();
RTC_IntDisable(RTC_IEN_COMP0 | RTC_IEN_COMP1);
RTC_IntClear(RTC_IEN_COMP0 | RTC_IEN_COMP1);
RTC_CounterReset();
RTC_IntEnable(RTC_IEN_COMP0);
end_atomic();
}
bool hw_timer_is_overflow_pending(hwtimer_id_t timer_id)
{
if(timer_id >= HWTIMER_NUM)
return false;
start_atomic();
//COMP0 is used to limit thc RTC to 16 bits -> use this one to check
bool is_pending = !!((RTC_IntGet() & RTC->IEN) & RTC_IFS_COMP0);
end_atomic();
return is_pending;
}
bool hw_timer_is_interrupt_pending(hwtimer_id_t timer_id)
{
if(timer_id >= HWTIMER_NUM)
return false;
start_atomic();
bool is_pending = !!((RTC_IntGet() & RTC->IEN) & RTC_IFS_COMP1);
end_atomic();
return is_pending;
}
INT_HANDLER(RTC_IRQHandler)
{
//retrieve flags. We 'OR' this with the enabled interrupts
//since the COMP1 flag may be set if it wasn't used before (compare register == 0 -> ifs flag set regardless of whether interrupt is enabled)
//by AND ing with the IEN we make sure we only consider the flags of the ENABLED interrupts
uint32_t flags = (RTC_IntGet() & RTC->IEN);
RTC_IntClear(RTC_IFC_OF | RTC_IFC_COMP0 | RTC_IFC_COMP1);
//evaluate flags to see which one(s) fired:
if((flags & RTC_IFS_COMP0) && (overflow_f != 0x0))
overflow_f();
if((flags & RTC_IFS_COMP1))
{
RTC_IntDisable(RTC_IEN_COMP1);
if(compare_f != 0x0)
compare_f();
}
}