Fault when I use NVS for settings storage

[EmanueleSartorini]

Hi, I'm writing a firmware for nRF52832 MCU based on Zephyr 2.4 and I try to load settings from flash with NVS method but get a fault. In particulary the debugger returns DATA VIOLATION FAULT. This is the code that I use to load settings and initialize the memory.

err = settings_subsys_init();
   if(!err){
        err = settings_register(&my_conf);
        if(!err){
            printk("settings_load...\n");
            err = settings_load();
        }
    }

settings_load...
[00:00:13.261,291] os: ***** MPU FAULT *****
[00:00:13.261,322] os: Data Access Violation
[00:00:13.261,322] os: MMFAR Address: 0x20006f5c
[00:00:13.261,322] os: r0/a1: 0x00029cbf r1/a2: 0x20006f84 r2/a3: 0x00033c1f
[00:00:13.261,352] os: r3/a4: 0x20007044 r12/ip: 0x656d6d69 r14/lr: 0x00004d03
[00:00:13.261,352] os: xpsr: 0x61000000
[00:00:13.261,352] os: Faulting instruction address (r15/pc): 0x00004a90
[00:00:13.261,352] os: >>> ZEPHYR FATAL ERROR 0: CPU exception on CPU 0
[00:00:13.261,352] os: Current thread: 0x20002a28 (unknown)
[00:00:13.506,256] os: Halting system

This is my settings in proj.conf file:

CONFIG_SETTINGS=y
CONFIG_BT_SETTINGS=y
CONFIG_NVS=y
CONFIG_FLASH=y
CONFIG_FLASH_PAGE_LAYOUT=y
CONFIG_FLASH_MAP=y

Anybody knows where is the problem? Thank you in advance!

[de-nordic]

Do you know which line cause the problem?
Can you experiment with values of CONFIG_MAIN_STACK_SIZE and CONFIG_HEAP_MEM_POOL_SIZE?

[EmanueleSartorini]

Thank you for your answer. I solved the problem setting CONFIG_MAIN_STACK_SIZE from 512 to 1024