SDK12.3，NRF51822-QFAA,DFU setting

[mdevil39]

Hi;

    I using  experimental_ble_app_buttonless_dfu as the project.  After build the project and download with softwareDevice , it works ok . Then I compile bootloader_secure and download by nRFgo studio, it cannot work .

      Is there anything I should change ? The bootloader and application project are all default from the sdk. 

      I know it maybe the ram setting wrong ,but I don't know how to set it . 

      From the ticket :https://devzone.nordicsemi.com/f/nordic-q-a/23340/sdk12-3-nrf51822-qfaa-dfu it need to change arm_startup_nrf51.s file , but I know it doesn't have to change this file . Is there any idea ? 

[tesc]

Hi,

When you program the bootloader directly (using a programmer), together with an application, then you must also generate and program a bootloader settings page. That way the bootloader is aware of the application. Otherwise it will think that no application should be started.

See the Bootloader settings section of the DFU process documentation, as well as the documentation for generating a bootloader settings file with nrfutil.

Regards,
Terje

[mdevil39]

If bootloader_secure project doesn't has any change it works ok : after program all files(softwareDevice/ application /bootloader), it can see from app: DfuTarg . But how can I make it runs normal after program all files,  instead of running in bootloader mode . 

I try to modify bootloader which make application doesn't enter bootloader mode after program bootloader, but it fail :

uint8_t m_boot_settings[CODE_PAGE_SIZE] __attribute__((at(BOOTLOADER_SETTINGS_ADDRESS))) __attribute__((used))= {BANK_VALID_APP};

[tesc]

Hi,

You should not modify the bootoader.

You need the following:

• Bootloader hex file
• Application hex file
• SoftDevice hex file
• Bootloader settings page hex file

You build the bootloader and application. You use the SoftDevice hex file provided by us. You generate the bootloader settings page with nrfutil.

Please have a look at the BLE Secure DFU Bootloader example and its documentation, in particular the Testing section.

Regards,
Terje

[mdevil39]

Thanks for your help .It works ok now .