Read out the bootloader version from nrfutil from the main application

[Dominik Eugster]

Hi

How can I read out the bootloader version from the main application which I defined in the zip packet (or merged hex) with nrfutil?

rfutil pkg generate --hw-version 52 --bootloader-version X

nrfutil settings generate --no-backup --family NRF52840 --application ' + input_app_file_name + ' --application-version 0 --bootloader-version X

I think this sould be availbale over a function or regiser in the main application?

[Vidar Berg]

Hello,

The application version will be kept in the bootloader settings area in the last flash page (Memory layout), so you could get the version number from there.

Example:

#include "nrf_dfu_types.h"

#define BOOTLOADER_SETTINGS_PAGE_ADDR 0xFF000

int main(void)
{
    bool erase_bonds;

    // Initialize.
    log_init();
    nrf_dfu_settings_t const * dfu_settings = (nrf_dfu_settings_t const *) BOOTLOADER_SETTINGS_PAGE_ADDR;
    NRF_LOG_INFO("Application version %d", dfu_settings->app_version);
    ...

Include path for nrf_dfu_types.h is ../../../../../../components/libraries/bootloader/dfu

The other alternative would be to integrate the DFU settings module in your application, but I don't think it makes sense in this case as you only need read access.

Best regards,

Vidar