Settings API Example Compiling, but not working

RE: Settings API Example Compiling, but not working

Jim Logsdon — Mon, 25 Aug 2025 19:46:17 GMT

please close this ticket

RE: Settings API Example Compiling, but not working

Susheel Nuguru — Sun, 09 Feb 2025 11:40:37 GMT

I will try to convey this to the design team and hopefully get the documentation include this piece of information.

RE: Settings API Example Compiling, but not working

Jim Logsdon — Fri, 07 Feb 2025 15:54:56 GMT

I finally have it working and I'm grateful for the help.

The missing piece was a file that Sasheel had in boards directory: nrf52dk_nrf52832.conf

While I'm grateful to have it working, but I do find it very inconvenient that this required file was not mentioned in the Settings documentation. Can Nordic please explain how I can be aware of such dependencies in the future?

Thank you,

Jim

RE: Settings API Example Compiling, but not working

Jim Logsdon — Fri, 07 Feb 2025 14:56:52 GMT

oops. Sorry. I didn't see that you attached your code.

RE: Settings API Example Compiling, but not working

Jim Logsdon — Fri, 07 Feb 2025 14:54:49 GMT

Oh wow. Thanks for doing that.

What CONFIG items did you have in your prj.conf file?

Of course I'm mystified why it's not working on my nrf52dk/nrf52832 board.

RE: Settings API Example Compiling, but not working

Susheel Nuguru — Fri, 07 Feb 2025 14:46:47 GMT

Tried your sample on nRF52832 DK and it seems to be working as expected with foo updated












*** Booting nRF Connect SDK v2.9.0-7787b2649840 ***
*** Using Zephyr OS v3.7.99-1f8f3dc29142 ***
foo: 19
*** Booting nRF Connect SDK v2.9.0-7787b2649840 ***
*** Using Zephyr OS v3.7.99-1f8f3dc29142 ***
foo: 20
*** Booting nRF Connect SDK v2.9.0-7787b2649840 ***
*** Using Zephyr OS v3.7.99-1f8f3dc29142 ***
foo: 21
*** Booting nRF Connect SDK v2.9.0-7787b2649840 ***
*** Using Zephyr OS v3.7.99-1f8f3dc29142 ***
foo: 22
*** Booting nRF Connect SDK v2.9.0-7787b2649840 ***
*** Using Zephyr OS v3.7.99-1f8f3dc29142 ***
foo: 23
*** Booting nRF Connect SDK v2.9.0-7787b2649840 ***
*** Using Zephyr OS v3.7.99-1f8f3dc29142 ***
foo: 24
*** Booting nRF Connect SDK v2.9.0-7787b2649840 ***
*** Using Zephyr OS v3.7.99-1f8f3dc29142 ***
foo: 25
*** Booting nRF Connect SDK v2.9.0-7787b2649840 ***
*** Using Zephyr OS v3.7.99-1f8f3dc29142 ***
foo: 26
*** Booting nRF Connect SDK v2.9.0-7787b2649840 ***
*** Using Zephyr OS v3.7.99-1f8f3dc29142 ***
foo: 27
*** Booting nRF Connect SDK v2.9.0-7787b2649840 ***
*** Using Zephyr OS v3.7.99-1f8f3dc29142 ***
foo: 28
*** Booting nRF Connect SDK v2.9.0-7787b2649840 ***
*** Using Zephyr OS v3.7.99-1f8f3dc29142 ***
foo: 29
*** Booting nRF Connect SDK v2.9.0-7787b2649840 ***
*** Using Zephyr OS v3.7.99-1f8f3dc29142 ***
foo: 30
*** Booting nRF Connect SDK v2.9.0-7787b2649840 ***
*** Using Zephyr OS v3.7.99-1f8f3dc29142 ***
foo: 31

Attaching my project including build folder

devzone.nordicsemi.com/.../settings.zip

RE: Settings API Example Compiling, but not working

Jim Logsdon — Fri, 07 Feb 2025 13:03:49 GMT

Thank you for your reply.

The link in my original post goes right to the example code in the Nordic documentation, but I'm happy to post it below.

The example, per the Nordic documentation at the link below, is intended to reset repeatedly to demonstrate how the data is stored and retrieved from FLASH successfully, even through resets. Unfortunately, that's not what I'm seeing.

docs.nordicsemi.com/.../index.html

Here's the example code:

#include <zephyr/kernel.h>

#include <zephyr/sys/reboot.h>

#include <zephyr/settings/settings.h>

#include <zephyr/sys/printk.h>

#include <inttypes.h>

#define DEFAULT_FOO_VAL_VALUE 0

static uint8_t foo_val = DEFAULT_FOO_VAL_VALUE;

static int foo_settings_set(const char *name, size_t len,

settings_read_cb read_cb, void *cb_arg)

{

const char *next;

int rc;

if (settings_name_steq(name, "bar", &next) && !next) {

if (len != sizeof(foo_val)) {

return -EINVAL;

}

rc = read_cb(cb_arg, &foo_val, sizeof(foo_val));

if (rc >= 0) {

return 0;

}

return rc;

}

return -ENOENT;

}

struct settings_handler my_conf = {

.name = "foo",

.h_set = foo_settings_set

};

int main(void)

{

settings_subsys_init();

settings_register(&my_conf);

settings_load();

foo_val++;

settings_save_one("foo/bar", &foo_val, sizeof(foo_val));

printk("foo: %d\n", foo_val);

k_msleep(1000);

sys_reboot(SYS_REBOOT_COLD);

}

Here's the prj.conf settings:

CONFIG_SETTINGS=y

CONFIG_REBOOT=y

Thank you for your help!

RE: Settings API Example Compiling, but not working

Susheel Nuguru — Fri, 07 Feb 2025 12:48:02 GMT

Hi James,

It is hard to know why the settings save and restore is not functioning without knowing the context and code you are using to do that. Can you share the code snippets of the save and restore being used and tell my why you were expecting so many resets?