About the cause of reset

[takashina hiroki]

SDK: 15.3.0
Device: EYSHJNZWZ (nRF52832)

Is there a way to know the cause of the reset?

I connect the PC to the device and run it in debug mode.
However, nothing is written to the log when the reset occurs.
I want to know what caused the reset.

[Hung Bui]

Hi Takashina, 

It's possible to know the cause of the last reset. In your code you can check the register RESETREAS to know the reset reason. Please have a look at section 18.6 in the NRF52 product specification. 

However, it's most likely a reset when there is an assertion. Please follow this guide on how to set your device to debug mode and get the assertion reason printed out on the log: https://devzone.nordicsemi.com/question/60125/my-device-is-freezing-and-restarting/#60126

[takashina hiroki]

I tried it the way I taught.

>> It's possible to know the cause of the last reset.In your code you can check the register RESETREAS to know the reset reason.
>> Please have a look at section 18.6 in the NRF52 product specification.

Indicates the "RESETREAS" status when a reset occurs.
At this time, I intentionally reset by WDT.
Other than "RESETPIN", it looks like "NotDetected".
I assumed that "DOG" would be "Detected".
Is the confirmation method bad?
Please tell me why this result.

>> However, it's most likely a reset when there is an assertion.
>> Please follow this guide on how to set your device to debug mode and get the assertion reason printed out on the log: devzone.nordicsemi.com/.../my-device-is-freezing-and- restarting / # 60126

I caused a reset by WDT in "DEBUG" mode, but no log was output.
Isn't log output when reset by WDT?
Please tell me.