Wireless MCUのトピックRe: KW36 lowpower vlls does not work

KW36 lowpower vlls does not work

darkblue — Wed, 18 Oct 2023 10:59:50 GMT

when I chose lowpower mode 4, suppose the mcu should be in in VLLS0/1 mode. but it doesn't work.

codes:

bool_t PWRLib_MCU_Enter_VLLSx(uint8_t mode)

{

bool_t lowpower_skipped = FALSE;

#if cPWR_EnableDeepSleepMode_8 || cPWR_EnableDeepSleepMode_5

if ( 0 == setjmp(pwr_CPUContext))

#endif

{

#if cPWR_EnableDeepSleepMode_8 || cPWR_EnableDeepSleepMode_5

if(gpfPWR_VLLS_EnterCb != NULL)

{

gpfPWR_VLLS_EnterCb();

}

#endif

LLWU->F1 = LLWU->F1;

LLWU->F2 = LLWU->F2;

LLWU->FILT1 |= LLWU_FILT1_FILTF_MASK;

LLWU->FILT2 |= LLWU_FILT2_FILTF_MASK;

SCB->SCR &= (uint32_t)~(uint32_t)(SCB_SCR_SLEEPONEXIT_Msk);

/* Set the SLEEPDEEP bit to enable CORTEX M0 deep sleep mode */

SCB->SCR |= SCB_SCR_SLEEPDEEP_Msk;

SMC->PMCTRL = (uint8_t)((SMC->PMCTRL & (uint8_t)~(uint8_t)(SMC_PMCTRL_STOPM(0x03))) | (uint8_t)(SMC_PMCTRL_STOPM(0x04)));

SMC->STOPCTRL = (SMC_STOPCTRL_PSTOPO(0x00) | SMC_STOPCTRL_LLSM(mode));

#if (cPWR_RamRetentionInVLLS == 2)

SMC->STOPCTRL |= SMC_STOPCTRL_RAM2PO_MASK;

#endif

#if cPWR_POR_DisabledInVLLS0

if (mode == 0)

{

SMC->STOPCTRL |= SMC_STOPCTRL_PORPO_MASK;

}

#endif /* cPWR_POR_DisabledInVLLS0 */

(void)(SMC->PMCTRL == 0U); /* Dummy read of SMC_PMCTRL to ensure the register is written before enterring low power mode */

/* WFI instruction will start entry into deep sleep mode */

__asm("WFI");

lowpower_skipped = TRUE;

}

return lowpower_skipped;

}

the function always go to “ lowpower_skipped = TRUE;” and the current is still very high. Doesn't like VLLS0/1 mode due to datasheet. Please help

Re: KW36 lowpower vlls does not work

Ricardo_Zamora — Wed, 18 Oct 2023 18:45:00 GMT

Hello,

Hope you are doing well. Could you please help me checking the "frdmkw36_demo_apps_power_mode_switch" example from the SDK?

Best Regards,

Ricardo

Re: KW36 lowpower vlls does not work

darkblue — Thu, 19 Oct 2023 02:50:58 GMT

Hi, Ricardo

Yes, frdmkw36_demo_apps_power_mode_switch works for me. Before I used PWR libs, seems not working. I will check again in my project. Thx buddy!

Re: KW36 lowpower vlls does not work

darkblue — Fri, 20 Oct 2023 10:15:02 GMT

I just tried on my board with the project:frdmkw36_demo_apps_power_mode_switch, the current can reach to 1μA .

But when I try to use frdmkw36_wireless_examples_bluetooth_ancs_c_freertos the current reach to 400μA even though there is only BLE host task and BOARD_BootClockRUN. I don't initialize any pin. How can I fix this? I just want to make the current same as frdmkw36_demo_apps_power_mode_switch runs, about 1μA.

Re: KW36 lowpower vlls does not work

Ricardo_Zamora — Fri, 20 Oct 2023 17:05:09 GMT

Hi,

If you are interested in using Low Power features with BLE examples, I would recommend checking the "frdmkw36_wireless_examples_bluetooth_temp_sens_freertos". This example

For more information about this example, you could refer to section "Low Power Temperature Sensor and Collector" from the Bluetooth Low Energy Demo Applications User Guide.pdf (SDK\docs\wireless\Bluetooth)

Hope this helps.

Regards,

Ricardo