How to use pstorage alongside a softdevice?

[Andrew]

I am wanting to use pstorage for storing a few persistent variables. I am working from the multilink central example, which already is using pstorage for, I assume, saving context. How do I use pstorage without breaking the other parts of the example?

I have been looking at the reference documentation...

infocenter.nordicsemi.com/index.jsp

but I am not sure how to weave it in to the project.

I am using sdk11 and s130

[Stefan Birnir Sverrisson]

Hi Andrew

There is an example here that uses pstorage. The pstorage code in this example should be valid for SDK 11.0.0 as well.

I do not notice that the ble_app_multilink_central example uses pstorage. If you think I am wrong, can you point me to the location.

[Artucas]

i think pstorage in ble_multilink_central example is used by device_manager. I'm trying to solve the same problem now, i am ussing pstorage module, but i keep losing data because device manager is already using pstorage.

/**@brief Function for initializing the Device Manager.
 *
 * @details Device manager is initialized here.
 */
static void device_manager_init(void)
{
    dm_application_param_t param;
    dm_init_param_t        init_param;

    uint32_t err_code;

    err_code = pstorage_init();
    APP_ERROR_CHECK(err_code);

    init_param.clear_persistent_data = false;
   
   ...
}

[Stefan Birnir Sverrisson]

Ok, thanks for the pointer. Keil did not find this for me for some reason.

You should only call pstorage_init once, then you can call pstorage_register multiple times from different locations. Each pstorage register will reserve flash space in different locations. So I suspect you should call device_manager_init before calling pstorage_register in other modules. Perhaps this link could help realize how flash space is reserved when pstorage_register is called from different modules.

[Artucas]

thanks Stefan, your link ant last comment helped me to solve the issue. Would mark this as answered, but this wasnt my question ;)

[Stefan Birnir Sverrisson]

Thanks for the feedback, I appreciate it