System off mode returning instantly.

RE: System off mode returning instantly.

Susheel Nuguru — Mon, 16 Jan 2017 11:15:37 GMT

You have to find the condition where it falls into the reset loop trap. Use breakpoints and see the call stack. You will probably find this as an APP_ERROR_CHECK failure which causes default eror handling to be resetting your device.

RE: System off mode returning instantly.

billt79 — Thu, 12 Jan 2017 18:53:23 GMT

the error number was 8, but thinking about it, that could have come from another function, as it was the last log printed before it started resetting.

I do power cycle the devices after programming so the issue lies elsewhere. I was able to get the nRF to go to deep sleep, by performing a soft reset and then going making it go to sleep instantly. I was not able to get a flag stored across the restart via the ram to work though, following an example. Might have to do with my startup files.

Instead of the flag, i decided to make it initialise its bit bash I2C/TWI driver and read the power status, and then set up of a wakeup pin. it just reads this status then goes to sleep if the condition is right. however it still continues to go into a reset loop.

RE: System off mode returning instantly.

Susheel Nuguru — Thu, 12 Jan 2017 08:13:55 GMT

What error number did you get? NRF_ERROR_INVALID_STATE? I do not think that error is possible with the call sd_power_system_off();

RE: System off mode returning instantly.

Daniel Wang — Wed, 11 Jan 2017 18:43:17 GMT

Are you in debug mode? See this : devzone.nordicsemi.com/.../

You should also power-cycle the device after you flash the device.