/**
* hibernate - LLWU is used to handle interrupts that wake. USB regulator is disabled and 3.3V output pin can only supply limited current and voltage drops to ~2.7V.
*
* @param configuration SnoozeBlock class config.
* @param mode |LLS|VLLS3|VLLS2|VLLS1|
*
* @return wakeup source
*/
int SnoozeClass::hibernate( SnoozeBlock &configuration, SLEEP_MODE mode ) {
SnoozeBlock *p = &configuration;
enable_periph_irq = false;
sleep_mode = mode;
cmp_set( &p->cmp_mask );
digital_set( &p->digital_mask );
lptmr_set( &p->lptmr_mask );
#ifdef KINETISK
rtc_alarm_set( &p->rtc_mask );
#endif
#ifdef KINETISL
pinMode( 17, OUTPUT );
digitalWriteFast( 17, LOW );
#endif
tsi_set( &p->tsi_mask );
llwu_set( &p->llwu_mask );
enableHibernate( );
if ( mode == LLS ) { enter_lls( ); }
else if ( mode == VLLS3 ) { enter_vlls3( ); }
else if ( mode == VLLS2 ) { enter_vlls2( ); }
else if ( mode == VLLS1 ) { enter_vlls1( ); }
else if ( mode == VLLS0 ) { enter_vlls0( ); }
disableHibernate( );
llwu_disable( );
tsi_disable( &p->tsi_mask );
#ifdef KINETISK
rtc_disable( &p->rtc_mask );
#endif
lptmr_disable( &p->lptmr_mask );
cmp_disable( &p->cmp_mask );
return wakeupSource;
}
/**
* sleep - most versatile sleep mode. SnoozeBlock configuration or any interrupt can wake the processor.
*
* @param configuration SnoozeBlock class config.
*
* @return wakeup source
*/
int SnoozeClass::sleep( SnoozeBlock &configuration ) {
SnoozeBlock *p = &configuration;
enable_periph_irq = true;
#ifdef KINETISL
tsi_set( &p->tsi_mask );
#endif
cmp_set( &p->cmp_mask );
lptmr_set( &p->lptmr_mask );
#ifdef KINETISK
rtc_alarm_set( &p->rtc_mask );
#endif
digital_set( &p->digital_mask );
#ifdef KINETISL
pinMode( 17, OUTPUT );
digitalWriteFast( 17, LOW );
#endif
if ( mcg_mode( ) == BLPI ) {
peripheral_disable( &p->setPeripheral.periph_off_mask );
enter_wait( );
peripheral_set( &p->setPeripheral.periph_off_mask );
}
else if ( mcg_mode( ) == BLPE ) {
peripheral_set( &p->setPeripheral.periph_off_mask );
blpe_blpi ( );
enter_vlpr( 0 );// now safe to enter vlpr
enter_wait( );
exit_vlpr ( );
blpi_blpe ( );
peripheral_set( &p->setPeripheral.periph_off_mask );
}
else {
peripheral_set( &p->setPeripheral.periph_off_mask );
usbDisable( );
pee_blpi ( );
enter_vlpr( 0 );// now safe to enter vlpr
enter_wait( );
exit_vlpr ( );
blpi_pee ( );
usbEnable ( );
peripheral_set( &p->setPeripheral.periph_off_mask );
}
digital_disable( &p->digital_mask );
#ifdef KINETISK
rtc_disable( &p->rtc_mask );
#endif
lptmr_disable( &p->lptmr_mask );
cmp_disable( &p->cmp_mask );
#ifdef KINETISL
tsi_disable( &p->tsi_mask );
#endif
return wakeupSource;
}
int timer_set(tim_t dev, int channel, unsigned int timeout)
{
if (channel != 0) {
/* only one channel is supported */
return -1;
}
if ((unsigned int)dev >= TIMER_NUMOF) {
/* invalid timer */
return -1;
}
/* demultiplex to handle two types of hardware timers */
switch (_timer_variant(dev)) {
case TIMER_PIT:
return pit_set(_pit_index(dev), timeout);
case TIMER_LPTMR:
return lptmr_set(_lptmr_index(dev), timeout);
default:
return -1;
}
}