/**
* 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;
}
int main (void)
{
char ch;
char low_power_mode = MODE_SELECT;
SMC_PMPROT = SMC_PMPROT_ALLS_MASK | SMC_PMPROT_AVLLS_MASK | SMC_PMPROT_AVLP_MASK ;
#ifdef CMSIS // If we are conforming to CMSIS, we need to call start here
start();
#endif
print_llwu_status();
gpio_init();
rtc_init(); // driven by 32kHz external oscillator //
vfnLCD_Init();
vfnLCD_Write_Msg("1234");
PORTC_PCR3 = PORT_PCR_MUX(1) | PORT_PCR_PE_MASK | PORT_PCR_PS_MASK;
enable_irq(INT_LLW-16);
llwu_configure(0x0080,0x02,LLWU_ME_WUME5_MASK); //M5= RTC Alarm, M7 RTC seconds
//check if it comes from VLLx mode
if (PMC_REGSC % PMC_REGSC_ACKISO_MASK)
{
if (last_gpio_status&0x01) LED1_ON; else LED1_OFF; //configure GPIO pin with latest state
PMC_REGSC |= PMC_REGSC_ACKISO_MASK; //write to release hold on I/O
last_gpio_status ^= 0x01; //update state for next work
}
printf("\n\rRunning the lcd_rtc_lowpower project.\n\r");
// wait 3 seconds before start entering in low power mode
while (rtc_seconds_isrv_count<3){};
while(1)
{
LED2_TOGGLE;
ch= (char)RTC_TSR;
sprintf(gu8USB_Buffer,"%4i",ch );
vfnLCD_Write_Msg(gu8USB_Buffer);
printf("\n\r llwu_isrv_counter = %i, rtc_isrv_counter=%i ",llwu_isrv_counter, rtc_isrv_counter );
printf(" "); //delay
switch (low_power_mode)
{
case MODE_WAIT:
enter_wait();
printf("\n\r exit from WAIT");
break;
case MODE_STOP:
/* 0x00 = STOP - Normal Stop Mode
0x40 = PSTOP1 - Partial Stop with both system and bus clocks disabled
0x80 = PSTOP2 - Partial Stop with system clock disabled and bus clock enabled
*/
enter_stop(0x00);
printf("\n\r exit from STOP");
break;
case MODE_LLS:
MCG_C6 &= ~MCG_C6_CME0_MASK; //Disable Clock Monitor before entering in low power mode LLS, VLSSx
enter_lls();
op_mode = what_mcg_mode();
if(op_mode==PBE)
{
mcg_clk_hz = pbe_pee(CLK0_FREQ_HZ);
MCG_C6 |= MCG_C6_CME0_MASK;
}
printf("\n\r exit from LLS");
break;
case MODE_VLLS3:
MCG_C6 &= ~MCG_C6_CME0_MASK;
enter_vlls3();
//Note: exit from VLLSx mode is through RESET PMC_REGSC_ACKISO is set
break;
// VLLS2 mode not supported on KL46
case MODE_VLLS1:
MCG_C6 &= ~MCG_C6_CME0_MASK;
enter_vlls1(); //In VLLS1 and VLLS0 no SRAM is retained.
//Note: exit from VLLSx mode is through RESET PMC_REGSC_ACKISO is set
break;
default:
}
}
}
