K82: WDOG in Stop mode

EugeneHiihtaja — Thu, 29 Nov 2018 10:33:48 GMT

Hi !

I have configured WDOG in way that it require update in Stop mode as well:

WDOG_GetDefaultConfig(&config);
config.prescaler = kWDOG_ClockPrescalerDivide1;
config.clockSource = kWDOG_LpoClockSource; // 1ms
config.workMode.enableWait = true; // If update in Wait is required
config.workMode.enableStop = true; // If update in LLS3 is required
config.timeoutValue = 5000; // ms
config.enableWdog = true;
WDOG_Init(WDOG, &config);

/* Accessing register by bus clock. */
for (uint32_t i = 0; i < 256U; i++)
{
(void) WDOG->RSTCNT;
}

It work fine when RTOS is running and stay under _WFI()

But in LLS3 mode it looks like as disabled and reset is not happens.

Should it cause reset in LLS3 mode if it not updated by WDOG_Refresh(WDOG) API ?

What is right way for update WDOG timeout on fly ? What should be enabled/disabled or WDOG_Init() with new parameters is OK ?

Regards,

Eugene

Re: K82: WDOG in Stop mode

jorge_a_vazquez — Fri, 30 Nov 2018 23:07:20 GMT

HI Eugene Hiihtaja

WDOG is not enabled in LLSx power mode, in this mode watchdog is static, which mean that register are retained but the module is not enabled.

The option in the API function is for STOP mode, which is different ofLLS and where the module is working (from low power clocks).

Hope this helps

Best regards

Jorge Alcala

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K82: WDOG in Stop mode

Re: K82: WDOG in Stop mode