Cannot upload user application code if Bootloader programmed

[DYNAMICTOYS]

HI,

I am using nRF51822 by Keil compiler. I found if it was programmed with boot loader nrf51422_xxac_s130.hex

by nRFGo Studio.

Then if download user code by Keil, it cannot run anymore. But if upload a zipped user code through DFU with priv.pem key, then it works.

use : Softdevie : S130, SDK V12.3

user code ROM1 is 0x1B000, length : 0x1F000 iRAM is 0x20001FE8 and length : 0x2018.

If bootloader is not programmed, user code can upload through Keil and can run step by step debugging too.

Any idea what is wrong?

Thanks!

Martin

[Stian Røed Hafskjold]

The bootloader is looking for a settings page at the end of flash to see if the application is valid. This settings page is created automatically when you upload your application code through the DFU. If you flash your app code manually through Keil or similar you need to generate and flash the settings page manually. Please have a look at this guide: infocenter.nordicsemi.com/.../nrfutil_settings_generate_display.html