Programming Blinky app with nrfjprog

RE: Programming Blinky app with nrfjprog

Einar Thorsrud — Tue, 26 Jan 2021 13:46:30 GMT

I see. Then we are back in this thread, I guess. I suggest we continue there.

RE: Programming Blinky app with nrfjprog

QuentinFarizon — Tue, 26 Jan 2021 12:02:44 GMT

00> <info> app: Inside main
00>
00> <debug> app: In nrf_bootloader_init
00>
00> <debug> nrf_dfu_settings: Calling nrf_dfu_settings_init()...
00>
00> <debug> nrf_dfu_flash: Initializing nrf_fstorage_nvmc backend.
00>
00> <debug> nrf_dfu_settings: Using settings page.
00>
00> <debug> nrf_dfu_settings: Copying forbidden parts from backup page.
00>
00> <debug> nrf_dfu_settings: Destination settings are identical to source, write not needed. Skipping.
00>
00> <info> nrf_dfu_settings: Backing up settings page to address 0x7E000.
00>
00> <debug> nrf_dfu_settings: Destination settings are identical to source, write not needed. Skipping.
00>
00> <debug> app: Enter nrf_bootloader_fw_activate
00>
00> <info> app: No firmware to activate.
00>
00> <debug> app: App is valid
00>
00> <info> nrf_dfu_settings: Backing up settings page to address 0x7E000.
00>
00> <debug> nrf_dfu_settings: Destination settings are identical to source, write not needed. Skipping.
00>
00> <debug> app: Running nrf_bootloader_app_start with address: 0x00001000
00>
00> <debug> app: Disabling interrupts. NVIC->ICER[0]: 0x0

RE: Programming Blinky app with nrfjprog

Einar Thorsrud — Tue, 26 Jan 2021 11:40:52 GMT

Hi,

Looking at your set of commands I do not see anything wrong. I see you wisely used the debug bootloader project now, and that has very good RTT logging. Can you observe the RTT log output and copy it here? That should show if the application is started or not, and if not, why.

RE: Programming Blinky app with nrfjprog

QuentinFarizon — Tue, 26 Jan 2021 11:28:48 GMT

Ok, I'm no further, with these steps :

# Build
emBuild -config 'Release' sdk16.0.0/examples/dfu/secure_bootloader/pca10040_s132_ble_debug/ses/secure_bootloader_ble_s132_pca10040_debug.emProject
emBuild -config 'Release' sdk16.0.0/examples/peripheral/blinky/pca10040/s132/ses/blinky_pca10040_s132.emProject

# Settings.hex generate
nrfutil settings generate --application ./sdk16.0.0/examples/peripheral/blinky/pca10040/s132/ses/Output/Release/Exe/blinky_pca10040_s132.hex --application-version-string ${APPLICATION_VERSION} --family NRF52 --bootloader-version 2 --bl-settings-version 2 --app-boot-validation VALIDATE_GENERATED_CRC settings.hex

# Merge hex
mergehex -m ./sdk16.0.0/examples/peripheral/blinky/pca10040/s132/ses/Output/Release/Exe/blinky_pca10040_s132.hex ./sdk16.0.0/examples/dfu/secure_bootloader/pca10040_s132_ble_debug/ses/Output/Release/Exe/secure_bootloader_ble_s132_pca10040_debug.hex settings.hex -o tmp.hex
mergehex -m tmp.hex ./sdk16.0.0/components/softdevice/s132/hex/s132_nrf52_7.0.1_softdevice.hex -o merged_app_bootloader_softdevice_settings.hex

nrfjprog --eraseall
nrfjprog --program merged_app_bootloader_softdevice_settings.hex --verify
nrfjprog --reset

Programing goes fine, but it doesn't blink :( which I guess means that app doesn't run

I guess I'm missing something, but what ?

RE: Programming Blinky app with nrfjprog

Einar Thorsrud — Mon, 25 Jan 2021 11:55:52 GMT

Hi,

The problem here is that both the application hex you are using and the bootloader hex you are using have been merged with the SoftDevice from before (SDK is shipped with merged hex files). So you are getting a conflict there. You need to use a bootloader hex which is not merged with the SoftDevice in this case.

Another key point is that the pre-built bootloader hex file is useless to you in case as you want to generate your own DFU upgrade package. Then you must also build the bootloader with your own public key. See bootloader example documentation for how to use your own key.