NRF52840 app - random hard fault

[Roei]

Hi,

My application has hard faults sometimes, and I'm trying to figure out the reason.

When it occurs - I have a hard fault log, but p_stack->pc is 0. I can't understand what is the problematic code line.

Do I have another ways to catch the issue?

Thanks!

[Roei]

In addition - the hard fault occurs in a specific function.

When testing performance of this function - I've noticed that CPU usage of one of the services if very high (about 800%).

Can it be related to the hard fault?

Thanks!

[Susheel Nuguru]

Roei said:

In addition - the hard fault occurs in a specific function

 Is this a function from a Nordic solution? Which function is it?

 

Roei said:

When testing performance of this function - I've noticed that CPU usage of one of the services if very high (about 800%).

the percentage of CPU usage should not be the reason for the hardfault. It might be the memory usage by that function. But if you know the function that causes this hardfault, then you can step in and debug to see which line exactly causes this. If this function is from the the Nordic solution (SDK) then i might be able to help you debug it if you help me reproduce it at my desk.

[Roei]

It's not a function from the SDK of Nordic solution - it's a new function which make a lot of job - writing and erasing a lot of pages from an external flash (using SPI protocol).

Already tried to debug and didn't find any specific line. It is also occurs not very often.

[Susheel Nuguru]

Roei said:

It's not a function from the SDK of Nordic solution - it's a new function which make a lot of job - writing and erasing a lot of pages from an external flash (using SPI protocol).

 In that case, this memory corruption is hard to track from our side as these seems to be introduced with your changes. And with the minimal information given and no way to reproduce on our end, it is very hard for me to narrow down the problem for you.

[Roei]

Hi,

Can you please tell me where can I increase beffurs size in sdk_config.h?

Thanks!