Device restarting for no obvious reason

[dragilla]

Hi, 

When I connect my device to an external power supply, it restarts randomly. It sometimes happens once every minute, sometimes once every 10 minutes. I couldn't find a pattern. 

Is there a way to figure out the reason somewhere in the software? I'm almost sure this is not a 100% HW issue, I changed a lot of things today in the SW only, and yesterday the device was not restarting :( However, when I just power it from the USB it does not restart.

Please, give me some advice. I will try to change the power supply but for now I only have one.

Thanks

[Jørgen Holmefjord]

Hi,

See this post.

You can also check the reason for a reset in the RESETREAS register, in case this is caused by HW issue and not a soft reset executed by software.

Best regards,
Jørgen

[dragilla]

The link you provided is for NRF52. Does NRF51 has something similar? Thanks

[Jørgen Holmefjord]

Yes, exactly the same. See table 53 in the nRF51 Reference Manual.

[dragilla]

Ok. I did what it says in the thread you linked. And voila, my app stopped on the breakpoint at the infite loop in the app_error.c. My stack looks like this.

https://photos.app.goo.gl/eUAVSZNbXPXkHRH7A

Am I right to read from it, that the device run out of memory? How is this possible if I'm not using any dyamic variables?

[Jørgen Holmefjord]

You are not necessarily running out of general memory on the chip, but as the API documentation for app_timer_start() explains, you get the NRF_ERROR_NO_MEM "If the timer operations queue was full."

You can configure the operation queue size when you call APP_TIMER_INIT() to initialize the library.