Avoid entering over the air bootloader but start with preprogrammed app

[FredNovalia]

Hi,

We are trying to use the over-the-air bootloader in our application. Our problem is the bootloader seems to require one first over-the-air download before it allows to start the application. Our application is actually preprogrammed using a DATAMAN serial wire debug programmer and we would like the app to run before the bootloader is entered.

What is the best way to start with a factory programmed application instead of waiting for the (over-the-air) bootloader to download it once.

Many thanks, Fred

[Petter Myhre]

Maybe one of these questions can help you?

How to flash the SoftDevice, the bootloader and the application at once?

Flashing bootloader and application via J-Link

Cannot init. the m_boot_settings in S110 7.0 bootloader

Remember to vote if you think any of the questions and answers are good and useful

[John]

You need to set the boot loader settings so that the application is marked as valid when you pre-program your application like so:

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

You can read more in this question/answer:

Bootload question

[Adrian Eggenberger]

We had the same problem and solved it by creating a hex file that contains a prepared bootloader setting with installed app. By using mergehex.exe we combine bootloader, application, softdevice and the initial bootloader setting to one hex file that is programmed in factory.