DFU bootloader prevents to load app hex

[fab]

Hi all,

I am on the DK-52 with the SDK 13.0.0.

After erasing the device, I follow this steps:

1. upload the softdevice

   nrfjprog --reset --program s132_nrf52_4.0.2_softdevice.hex --family NRF52

2. upload the bootloader (bootloader_secure_ble)

   nrfjprog --reset --program nrf52832_xxaa_s132.hex --family NRF52

After that the bootloader enters in DFU mode (LED1 and LED3 on)

If I try to upload my app firmware:

nrfjprog --reset --program pollen_device.hex --sectorerase --family NRF5

I get this error:

Argument provided has a wrong value. Memory access not aligned, value outside of range or similar

If I try to upload the app from my iPhone (using iOSDFULibrary) I am able to upload the app firmware, the device resets and the app starts correctly.

My app firmware has:

FLASH_START=0x1F000
SRAM_START=0x20001fe0

How do I correctly upload the app firmware via nrfjprog?

Thank you.

[Hung Bui]

Hi,

I'm not so sure about the python issue, make sure you use python 2.7 also you can try using nRFConnect application to do DFU.

If you plan to merge application, bootloader, softdevice, you can follow my guide here at appendix 1.

[fab]

Hi Hung Bui, Thank you, you saved my day. Generating the bootloader settings made the trick. I am now able to upload the app firmware both from nrfjprog and form my mobile app.

Maybe others are interested in the procedure that worked for me:

1) Erase the device: nrfjprog -e --family NRF52 
2) Generate the bootloader settings: nrfutil settings generate --family NRF52 --application pollen_device.hex --application-version 0x01 --bootloader-version 0 --bl-settings-version 1 bootloader_setting.hex
3) Upload the settings: nrfjprog --program bootloader_setting.hex --family NRF52 
4) Upload the bootloader: nrfjprog --reset --program nrf52832_xxaa_s132.hex --family NRF52 
5) Upload the softdevice: rfjprog --reset --program s132_nrf52_4.0.2_softdevice.hex --family NRF52
6) Upload the app firmware: nrfjprog --reset --program s132_nrf52_4.0.2_softdevice.hex --family NRF52