nrf51822 s130 hardfault error

[_maibi]

My old question

SDK: 12.1.0

SOFTDEVICE: s130

CHIP: nrf51822_xxac 256KB flash, 32KB ram

I have used to store application data in flash using sd_flash_write and erase functions.

I get the application data communicating smart phone by ble.

First connection always success in connecting and writing the data in flash.

But, Second connection has always failed writing the data. --> hardfault error occur or stuck somewhere.

so I run gdb. at this error, I get message "Program received signal SIGTRAP, Trace/breakpoint trap.".

pic is info register.

what does mean pc value 0xfffffffe? Is it softdevice error?

this error can be prevented by deleting sd_flash_write and erase functions. so I think this problem is related on flash write and erase functions.

should I use fstorage library?

What should I start with to track my error?

[_maibi]

very strange behavior. the error suddenly disappear. I just re-compile and test repeatedly.

I have been making first and second flash dump files. but... this error never happen..  bother me for several days..

this is related on my old question. only gcc has error but keil. and repeatedly compile with keil. sometimes similar error occur too.

It is very confusing. Certainly there is a hidden problem.

Is it possible that something is wrong with using the sd_flash functions?

Or Could it be a problem caused by a wrong cast?

[_maibi]

Farther debugging, I found something. Could you check this? devzone.nordicsemi.com/.../what-is--fdata-sections-in-gcc