Wireless MCUのトピックRe: JN5189 Power_GetResetCause

JN5189 Power_GetResetCause

kuanyc — Tue, 01 Nov 2022 10:12:56 GMT

Hi, following the powerdown_demo example to implement both Timer0 source and DIO wake up sources, the device is able to wake up according to timer0 interval setting or manual pressing of button BP1.

However, the POWER_GetResetCause() function only returns 0x40u (PMC_RESETCAUSE_WAKEUPPWDNRESET_MASK), regardless if it is woken up by Timer0 or BP1 button.

Is there another way to check the source of each wake up?

Thanks in advance!

Re: JN5189 Power_GetResetCause

Ricardo_Zamora — Wed, 02 Nov 2022 21:26:34 GMT

Hello,

Hope you are doing well. The POWER_GetResetCause reads the Reset Cause Register (RESETCAUSE), and the 0x40 (WAKEUPPWDNRESET) specifies that a timer or IO is a possible source:

Regards,

Ricardo

Re: JN5189 Power_GetResetCause

kuanyc — Thu, 03 Nov 2022 03:03:34 GMT

Hi Ricardo, thanks for the pointer. Can I ask which is the document that describes this table?

(Sorry, i'm still new to the SDK)

Thanks.

Re: JN5189 Power_GetResetCause

Ricardo_Zamora — Thu, 03 Nov 2022 14:57:47 GMT

Hello,

You can find more information about the API's on the "MCUXpresso SDK API Reference Manual_JN5189.pdf".

Also, the information about the register is on the "JN5189(T)/JN5188(T) User manual" (section 1.1.10 Reset Cause Register).

Regards,

Ricardo