topic Re: K32L2A41A How to select 1 kHz LPO as a clock source for RTC in MCUXpresso Config Tools

K32L2A41A How to select 1 kHz LPO as a clock source for RTC

pciampanelli — Thu, 09 Feb 2023 13:59:55 GMT

Hi,

using MCUXpresso IDE I'm trying to configure RTC Clock source to be 1kHz LPO.

The peripheral tool says: "The clock configuration of the RTC peripheral is a part of the clock tool" where the clock for RTC should be selected, but I find no sign of such configuration in Clock tool.

Can anyone help please?

thanks

Paolo

Re: K32L2A41A How to select 1 kHz LPO as a clock source for RTC

RaRo — Fri, 10 Feb 2023 17:27:50 GMT

Hello @pciampanelli,

It seems that you will have to configurate the RTC Clock Configuration by yourself. You could look at the SDK's examples or call the following function: RTC_SetClockSource(), between RTC_Init() and RTC_Stop().

There you could try to set the LPO as your clock source [in fsl_rtc.h], as follows:

static inline void RTC_SetClockSource(RTC_Type *base) { // base->CR |= RTC_CR_LPOS_MASK; // }

Best regards, Raul.

Re: K32L2A41A How to select 1 kHz LPO as a clock source for RTC

pciampanelli — Mon, 13 Feb 2023 06:37:14 GMT

Thanks Raul,

this solves the issue

best regards,

Paolo