S32K148 Run to VLPS Problem

shijie_zheng — Wed, 04 Nov 2020 08:44:11 GMT

Dear TechSupporter:
I had a problem when I setting VLPS mode with S32K148(run freertos system,and use s32ds debug).
I have read AN5425.pdf, before trans to VLPS mode,set SCG,PMC,SMC register,then set an GPIO Interrput to wakeup from VLPS mode,
Without debug, I tried to trans to VLPS mode,then I use gpio interrupt to wakeup,but I found that interrupt execution, but the main() is not running again, I saved some screenshots when using PE in the debugging,
Was it something I missed?I'm not sure if actually trans to VLPS mode.
Is there a way to check if mcu have entered VLPS mode?
If mcu already in VLPS mode ,after wake up,main() function will be call again?
can you help me to analyze this question?

1:the clock configuration is as follows
I have run clock init in main() function:
/* Initialize and configure clocks */
CLOCK_SYS_Init(g_clockManConfigsArr, CLOCK_MANAGER_CONFIG_CNT,g_clockManCallbacksArr, CLOCK_MANAGER_CALLBACK_CNT);
CLOCK_SYS_UpdateConfiguration(0U, CLOCK_MANAGER_POLICY_AGREEMENT);

2:before transfer to VLPS, I have set register as follows:

uint32_t tempSIRC = SCG->SIRCCSR;
uint32_t tempFIRC = SCG->FIRCCSR;

INT_SYS_DisableIRQGlobal();
/*set wakeup gpio ptc9 interrupt enable*/
GPIO_Port_Function_Set(PORTC,PIN_INDEX_9,PIN_FUNCTION_ALT1);
GPIO_Port_Dir_Set(PTC,PIN_INDEX_9,DIR_INPUT);
INT_WakeUp_Set(PORTC,PIN_INDEX_9,PORT_INT_FALLING_EDGE);
INT_SYS_InstallHandler(PORTC_IRQn, &PORTC_IRQHandler, NULL);
INT_SYS_EnableIRQ(PORTC_IRQn);

INT_SYS_EnableIRQGlobal();

/* Disable Clock monitor for System Oscillator */
SCG->SOSCCSR &= ~(SCG_SOSCCSR_SOSCCM_MASK);
SCG->SOSCCSR &= ~(SCG_SOSCCSR_SOSCEN_MASK);
/* Disable Clock monitor for System PLL */
SCG->SPLLCSR &= ~(SCG_SPLLCSR_SPLLCM_MASK);
SCG->SPLLCSR &= ~(SCG_SPLLCSR_SPLLEN_MASK);
/* Disable Clock monitor for System FRIC */
SCG->FIRCCSR |= SCG_FIRCCSR_FIRCREGOFF_MASK; /* Disable FIRC regulator */
SCG->FIRCCSR &= ~SCG_FIRCCSR_FIRCEN_MASK; /* Disable FIRC clock */
/* Disable SIRC in VLPS */
tempSIRC &= ~(SCG_SIRCCSR_SIRCLPEN_MASK |SCG_SIRCCSR_SIRCSTEN_MASK);
/* Enable SIRC in VLPS */
tempSIRC |= SCG_SIRCCSR_SIRCLPEN_MASK |SCG_SIRCCSR_SIRCSTEN_MASK;
SCG->SIRCCSR = tempSIRC;

/* Allow very low power modes*/
SMC->PMPROT |= SMC_PMPROT_AVLP_MASK;
/* Enable Stop Modes in the Core */
S32_SCB->SCR |= S32_SCB_SCR_SLEEPDEEP_MASK;
/* CLKBIASDIS=1: In VLPS mode, the bias currents and reference voltages*/
PMC->REGSC |= PMC_REGSC_BIASEN_MASK;
/* Select VLPS Mode */
SMC->PMCTRL = SMC_PMCTRL_STOPM(2);//0b10
if(1 == SMC->PMSTAT)
{
__asm("DSB");
__asm("ISB");
/* Call WFI to enter DeepSleep mode */
__asm("WFI");
}

3:GPIO Interrput function as follows

void PORTC_IRQHandler(void)

{

uint32_t IRQflag = 0;

IRQflag = INT_Read_IRQ_Flag(PORTC);

/*PTC9:Falling Edge:Trigger*/
if((IRQflag&(1 << 9)) != 0)
{

;

}

Re: S32K148 Run to VLPS Problem

dianabatrlova — Thu, 05 Nov 2020 10:04:02 GMT

Hello,

>>Is there a way to check if mcu have entered VLPS mode?

You can verify VLPS entry by measuring current, please, refer to the DS rev 13. "Table 13. Power consumption"

>>If mcu already in VLPS mode ,after wake up,main() function will be call again?

No, the program continues.

1. Your clock configuration is correct.

2. When you are using SDK, I would like to suggest looking at an example from the S32DS (File -> New -> S32DS Project from Example) power_mode_switch_s32k148

You can easily set VLPS mode using "POWER_SYS_SetMode()" function located in the "power_manager.c" file.

So, this example can be used for your testing purpose to verify the behavior in VPLS mode.

I hope it helps,

Best regards,

Diana

Re: S32K148 Run to VLPS Problem

shijie_zheng — Mon, 09 Nov 2020 03:18:55 GMT

Hi dianabatrlova：

thank you for your reply,it's my misunderstood,when mcu wake up, the program continue to run,

so I reconfigured Clock after POWER_SYS_SetMode(), now it can wake up normally.

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