RTC and LLS, KL15Z128

serjnone — Tue, 02 Apr 2013 08:57:32 GMT

Hello. I have some problems with using RTC for wakeup from LLS. I am use KL15Z128 processor

//-----------------------------------------------------

void main(void)

{

__disable_interrupt();

SIM_COPC = 0x00; /* Disable the watchdog timer */

unsigned int res = fei_fee_my();

change_core_prs(0); //max frq

LPTMRInit(0); //init and stop LPTR

rtc_init(0, 0); //init RTC

LLWU_Init(); //init LLWU wakeup by button, LPTR, RTC

PITInit(periph_clk, PIT_PERIOD_US); //PIT period 1000 uS

UART0_init(FLL_FRQ_OUT, 115200); //debug uart

PutStringDebug("Low Power Modes Test\r\n");

displaySDID(); //display SIM_SDID and SIM_FCFG1

PutStringDigitDebug("FEI to FEE RES: ", res);

PutStringDigitDebug("MCG MODE: ", what_mcg_mode());

rtc_set_alarm(10); //set first rtc alarm at 10 sec

while(1)

{

if(gFlags.rtcAlarmFlag) rtc_set_alarm(10); //reinit rtc alarm

if(_getcharDebug() == 's')

{

PutStringDebug("Press SW to wake up from LLS\r\n");

delay_ms(10);

unsigned int fee_fbe_res = fee_fbe_my();

unsigned int fbe_blpe_res = fbe_blpe_my();

gFlags.llwuMSK = 0;

rtc_set_alarm(10); //set rtc alarm fo wakeup from lls at 10 sec

LPTMRInit(15000); //set LPTR for wakeup from lls at 15 sec

LPTMRStart();

__enable_interrupt();

enter_lls(); //enter LLS

LPTMRStop(); //stop LPTR

unsigned int blpe_fbe_res = blpe_fbe_my();

res = fbe_fee_my();

change_core_prs(0); //max frq

PITInit(periph_clk, PIT_PERIOD_US); //PIT period 1000 uS

UART0_init(FLL_FRQ_OUT, 115200); //init debug-uart

PutStringDebug("Exit From Low Power Mode\r\n");

PutStringDigitDebug("FEE to FBE RES: ", fee_fbe_res);

PutStringDigitDebug("FBE to FEE RES: ", res);

PutStringDigitDebug("MCG MODE: ", what_mcg_mode());

PutStringDigitDebug("LLWU FLAG: ", gFlags.llwuMSK);

PutStringDigitDebug("LLWU F1: ", LLWU_F1);

PutStringDigitDebug("LLWU F2: ", LLWU_F2);

PutStringDigitDebug("LLWU F3: ", LLWU_F3);

gFlags.llwuMSK = 0;

}

//------------------------------------------

void RTCA_IRQHandler(void)

{

if((RTC_SR & RTC_SR_TIF_MASK)== 0x01)

{

PutStringStringDebug(0, "SRTC time invalid interrupt entered...\r\n");

RTC_SR &= 0x07; //clear TCE, or RTC_TSR can not be written

RTC_TSR = 0x00000000; //clear TIF

}

else if((RTC_SR & RTC_SR_TOF_MASK) == 0x02)

{

PutStringStringDebug(0, "SRTC time overflow interrupt entered...\r\n");

RTC_SR &= 0x07; //clear TCE, or RTC_TSR can not be written

RTC_TSR = 0x00000000; //clear TOF

}

else if((RTC_SR & RTC_SR_TAF_MASK) == 0x04)

{

PutStringDigitDebug("SRTC alarm interrupt entered: ", RTC_TSR);

RTC_TAR = 0xffffffff;// Write new alarm value, to generate an alarm every second add 1

gFlags.rtcAlarmFlag = 1;

}

//------------------------------------------

FAMID: 0010 KL2x Family (USB)

11:30:42.848> SUBFAMID:

void rtc_init(unsigned char c_interval, unsigned char c_value)

{

/*enable the clock to SRTC module register space*/

SIM_SCGC6 |= SIM_SCGC6_RTC_MASK;

/*Only VBAT_POR has an effect on the SRTC, RESET to the part does not, so you must manually reset the SRTC to make sure everything is in a known state*/

/*clear the software reset bit*/

RTC_CR = RTC_CR_SWR_MASK;

RTC_CR &= ~RTC_CR_SWR_MASK;

RTC_CR |= RTC_CR_UM_MASK | RTC_CR_SUP_MASK;

install_irq(RTCA_irq_no, RTCA_prio);

/*Set time compensation parameters*/

RTC_TCR = RTC_TCR_CIR(c_interval) | RTC_TCR_TCR(c_value);

/*Configure the timer seconds and alarm registers*/

RTC_TSR = 0;

RTC_TAR = 0xffffffff;

gFlags.rtcAlarmFlag = 0; //сброс флага прерывания

RTC_IER = RTC_IER_TIIE_MASK | RTC_IER_TOIE_MASK | RTC_IER_TAIE_MASK;

/*Enable the counter*/

RTC_SR |= RTC_SR_TCE_MASK;

}

void rtc_set_alarm(unsigned long long int alarm)

{

unsigned long long int new_alarm = ((unsigned long long int) RTC_TSR) + alarm;

if(alarm > 0xffffffff) alarm = 0xffffffff;

RTC_TAR = RTC_TSR + alarm;

gFlags.rtcAlarmFlag = 0;

}

//------------------------------------------

void LLWU_IRQHandler(void)

{

if(LLWU_F1 & LLWU_F1_WUF5_MASK)

{

gFlags.llwuMSK |= 0x01;

LLWU_F1 |= LLWU_F1_WUF5_MASK;

PORTB_PCR0 |= PORT_PCR_ISF_MASK; //clear button interrupt flag

}

if(LLWU_F3 & LLWU_F3_MWUF0_MASK)

{

gFlags.llwuMSK |= 0x02;

LLWU_F3 |= LLWU_F3_MWUF0_MASK;

LPTMR0_CSR |= LPTMR_CSR_TCF_MASK; //Clear LPT Compare flag

}

if(LLWU_F3 & LLWU_F3_MWUF5_MASK)

{

gFlags.llwuMSK |= 0x04;

LLWU_F3 |= LLWU_F3_MWUF5_MASK;

if((RTC_SR & RTC_SR_TIF_MASK)== 0x01)

{

RTC_SR &= 0x07; //clear TCE, or RTC_TSR can not be written

RTC_TSR = 0x00000000; //clear TIF

}

else if((RTC_SR & RTC_SR_TOF_MASK) == 0x02)

{

RTC_SR &= 0x07; //clear TCE, or RTC_TSR can not be written

RTC_TSR = 0x00000000; //clear TOF

}

else if((RTC_SR & RTC_SR_TAF_MASK) == 0x04)

{

RTC_TAR = 0xffffffff;// Write new alarm value, to generate an alarm every second add 1

gFlags.rtcAlarmFlag = 1;

}

return;

}

//--------------------------------------------------

void LLWU_Init(void)

{

install_irq(LLWU_irq_no, LLWU_prio); //LPTMR_irq_no

/* Enable Port B0 to be a digital pin. */

SIM_SCGC5 |= SIM_SCGC5_PORTB_MASK;

PORTB_PCR0 =(PORT_PCR_ISF_MASK | //clear flag if there

PORT_PCR_MUX(01) | //set pin functionality -GPIO

PORT_PCR_IRQC(0x0A)); //falling edge interrupt enable*/

/* WUPE0 is used in this case since it is associated with PTE1.

* This information is in the Chip Configuration chapter of the Reference Manual.

* 0b10: External input pin enabled with falling edge detection

LLWU_PE2 |= LLWU_PE2_WUPE5(LLWU_PIN_FALLING); //falling edge detection

//enable LPTR and RTC as wakeup modules

LLWU_ME |= LLWU_ME_WUME0_MASK | LLWU_ME_WUME5_MASK; //описание внутренних модулей стр. 61 KLQRUG

}

//--------------------------------------------------

Log from device

11:30:42.617> Low Power Modes Test

11:30:42.617>

11:30:42.848> RESET SRC: POR

11:30:42.848> RESET SRC: BROWN OUT

11:30:42.848>

11:30:42.848> SIM_SDID: 0x2515048F

11:30:42.848> SIM_FCFG1: 0x0F000000

11:30:42.848> FAMID: 0010 KL2x Family (USB)

11:30:42.848> SUBFAMID: 0101 KLx5 Subfamily (advanced analog)

11:30:42.848> SERIESID: 0001 KL family

11:30:42.848> SRAMSIZE: 0101 16 KB

11:30:42.848> REVID: 0

11:30:42.848> DIEID: 9

11:30:42.848> PINID: UNDEFINED: 15

11:30:42.848> FLASHSIZE: 1111 128 KB of program flash memory, 4 KB protection region

11:30:42.848> FEI to FEE RES: 23986176

11:30:42.848> MCG MODE: 4

11:30:53.621> SRTC alarm interrupt entered: 11

11:31:04.683> SRTC alarm interrupt entered: 22

11:31:05.997> Press SW to wake up from LLS

11:31:22.309> Exit From Low Power Mode

11:31:22.309> FEE to FBE RES: 32768

11:31:22.309> FBE to FEE RES: 23986176

11:31:22.309> MCG MODE: 4

11:31:22.309> LLWU FLAG: 2

11:31:22.309> LLWU F1: 0

11:31:22.309> LLWU F2: 0

11:31:22.309> LLWU F3: 0

11:31:32.438> SRTC alarm interrupt entered: 34

11:31:43.439> SRTC alarm interrupt entered: 45

First i can see that FAMID KL2x bat i am use KL15

PINID - undefined

I can see that device normally wake up from LLS by button or LPTR? but not by RTC.

Pleas help me - what i do wrong.

Re: RTC and LLS, KL15Z128

serjnone — Wed, 03 Apr 2013 10:44:33 GMT

Today i check OSC generation and i can se that after entering to LLS oscillator is stoped. I use OSC32KCLK clock source fo RTC. From documentation OSCERCLK and OSC32KCLK can work in low power modes (25.3 Block Diagram). But it is not sou. I cannot find any settings that disable or enable OSC or OSC32KCLK in low power mode.

After startup i configure MCG fei_fee();

Before entering to LLS

fee_fbe();

fbe_blpe();

In all cases i can see OSC generation. Only after entering at LLS it lost.

Now i use correct CPU

13:39:20.739> SIM_SDID: 0x15152482

13:39:20.739> SIM_FCFG1: 0x07000000

13:39:20.739> FAMID: 0001 KL1x Family (basic)

13:39:20.739> SUBFAMID: 0101 KLx5 Subfamily (advanced analog)

13:39:20.739> SERIESID: 0001 KL family

13:39:20.739> SRAMSIZE: 0101 16 KB

13:39:20.739> REVID: 2

13:39:20.739> DIEID: 9

13:39:20.739> PINID: 0010 32-pin

13:39:20.739> FLASHSIZE: 0111 128 KB of program flash memory, 4 KB protection region

Re: RTC and LLS, KL15Z128

vicentegomez — Tue, 21 May 2013 20:56:49 GMT

Please check the attached file is validation code of the RTC and in different Low power modes.

I hope this will help you.

Re: RTC and LLS, KL15Z128

willx — Fri, 23 Oct 2015 05:39:49 GMT

Hi serj none, did you ever solve this ? I'm facing a similar problem and unable to wake up a K64 from any VLLS level using the RTC Alarm.

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