nrf52840 uart dfu fail

RE: nrf52840 uart dfu fail

Susheel Nuguru — Fri, 21 Feb 2025 11:35:49 GMT

You cannot have application start at 0x00001000 as you have softdevice located at that place.

Can you show me how you compiled your application? that is the application flash layout settings?

RE: nrf52840 uart dfu fail

Susheel Nuguru — Fri, 21 Feb 2025 11:33:41 GMT

Why is the application start address at 0x00001000?

Either you are using a settings page that have wrong start address, or you have configured the app start address wrong. Try erasing the whole chip and flashing again examples\dfu\secure_bootloader\pca10056_uart_debug on a clean chip. Flash all bootloader, application and valid settings page.

RE: nrf52840 uart dfu fail

john.liu — Tue, 18 Feb 2025 12:19:05 GMT

hi:

nrfutil settings generate --family NRF52840 --application spectrumWear_v008\EventSystem.hex --application-version 3 --bootloader-version 2 --bl-settings-version 1 middle\settings.hex

mergehex.exe -m s140_nrf52_7.2.0_softdevice.hex spectrumWear_v008/EventSystem.hex -o middle/sd_app.hex

mergehex.exe -m middle\sd_app.hex spectrumWear_v008/bootloader_uart.hex -o middle/sd_app_boot.hex

mergehex.exe -m middle\sd_app_boot.hex middle/settings.hex -o spectrumWear_v008/spectrumWear_all.hex

nrfjprog.exe --family NRF52 --eraseall
nrfjprog.exe --family NRF52 --program spectrumWear_v008\spectrumWear_all.hex
nrfjprog.exe --family NRF52 --verify spectrumWear_v008\spectrumWear_all.hex
nrfjprog.exe --reset

It cannot jump to the application layer.

devzone.nordicsemi.com/.../bootloader_5F00_uart.hex devzone.nordicsemi.com/.../EventSystem.hex devzone.nordicsemi.com/.../2210.s140_5F00_nrf52_5F00_7.2.0_5F00_softdevice.hex

RE: nrf52840 uart dfu fail

Susheel Nuguru — Mon, 17 Feb 2025 12:53:59 GMT

Something seems wrong with the settings page you have, try to erase the settings page and regenerate the settings page using nrfutil and flash it again. See if you are using the right version of bootloader and application for the settings