nRF52840 SDK16 s140 - Bootloader and Softdevice

RE: nRF52840 SDK16 s140 - Bootloader and Softdevice

Amanda Hsieh — Mon, 10 Aug 2020 11:53:29 GMT

Hi Nick,

[quote user="Nikosant03"]Maybe when I buid the application with Segger IDE it merges the application with softdevice into a single .hex file? [/quote]

No, the Segger doesn't merge the .hex file. It loads the softdevice and application images separately.

[quote user=""]So I was thinking that I have to program the bootloader on nRF52840 before attempting to upload my firmware. [/quote]

It's the MBR which is to provide an interface to allow in-system updates of the application, the SoftDevice, and bootloader firmware. The softdevice is merged with the exact same MBR hex-file. See the Master boot record and bootloader documentation.

You can start from Template Application to see who it loads the softdevice and application.

-Amanda H.

RE: nRF52840 SDK16 s140 - Bootloader and Softdevice

Nikosant03 — Mon, 10 Aug 2020 10:02:02 GMT

Thanks you for your responce Amanda,

[quote userid="77782" url="~/f/nordic-q-a/64621/nrf52840-sdk16-s140---bootloader-and-softdevice/263748"]If you use a Segger example, it will also load the softdevice[/quote]

I didn't know that thanks!!

[quote userid="77782" url="~/f/nordic-q-a/64621/nrf52840-sdk16-s140---bootloader-and-softdevice/263748"]When you use nrfjprog / nRF Connect Programmer programming directly, you have to load the softdevice manually. [/quote]

Well I used the nrfjprog and the nRF Connect Programmer and I didn't have to upload the softdevice manually in any case. I just uploaded the .hex provided with your examples. Maybe when I buid the application with Segger IDE it merges the application with softdevice into a single .hex file?

[quote userid="77782" url="~/f/nordic-q-a/64621/nrf52840-sdk16-s140---bootloader-and-softdevice/263748"]To use nRF connect Programmer, you have to load (Add HEX file) softdevice (under \nRF5_SDK\components\softdevice\s140\hex\s140_nrf52_7.0.1_softdevice.hex) and bootloader. [/quote]

As I mentioned before I didn't have to load the softdevice (it is likely was merged with the application file). Which one is the bootloader file (where can I find it)? I didn't loaded any bootloader file and the application was programmed fine.

Thanks

Nick

RE: nRF52840 SDK16 s140 - Bootloader and Softdevice

Amanda Hsieh — Mon, 10 Aug 2020 07:38:37 GMT

Hi Nikos,

[quote user=""]My guess is that your BLE examples incorporates the softdevice and it is programming automatically? If this is true why your guide sais that "you must program the softdevice on the board"?[/quote]

If you use a Segger example, it will also load the softdevice. When you use nrfjprog / nRF Connect Programmer programming directly, you have to load the softdevice manually.

[quote user=""] I am straggling to understand the procedure.. What I've done so far in order to program the board using the "programmer" app of nRF connect for Desktop platform is:[/quote]

To use nRF connect Programmer, you have to load (Add HEX file) softdevice (under \nRF5_SDK\components\softdevice\s140\hex\s140_nrf52_7.0.1_softdevice.hex) and bootloader.

-Amanda H.