NRF52832 crashing when writing to an array

RE: NRF52832 crashing when writing to an array

Einar Thorsrud — Tue, 08 Oct 2019 11:29:26 GMT

Hi,

There is not much information to go on here. You write that your code is stuck in the loop waiting for err to be 0, and that is returned from a function called FlashPageRead() which you have not posted. Please provide more information and code so that we can better understand what is happening.

RE: NRF52832 crashing when writing to an array

bryanhsieh — Mon, 07 Oct 2019 12:02:52 GMT

I am not using RTOS, but just J-Link RTT which doesnt seem to give any errors, not too sure if there is an option related to system errors that I could enable, can only see peripheral related debugging.

To verify the error, I changed the array size one by one till I got the system to work. I tried debugging it but I couldn't get anything useful out of it. The debugger just hangs on the while( err != 0 ); line as shown by the CMP in disassembly, even though its value is 0.

RE: NRF52832 crashing when writing to an array

awneil — Mon, 07 Oct 2019 11:43:40 GMT

A post on debugging nRF crashes:

https://devzone.nordicsemi.com/f/nordic-q-a/10729/my-device-is-freezing-and-restarting

RE: NRF52832 crashing when writing to an array

awneil — Mon, 07 Oct 2019 11:33:10 GMT

[quote userid="23740" url="~/f/nordic-q-a/52969/nrf52832-crashing-when-writing-to-an-array"]I suspect to be memory out of bounds exception[/quote]

So what debugging have you done to verify if that actually is the case ?

Are you using an RTOS or something? There isn't a "memory out of bounds exception" as such on the Cortex-M4.

But you could be causing a buffer overrun, leading to memory corruption - which, in turn, could cause stuff to crash.

If you use a 'Debug' build configuration, do you get any useful logs ?