nRF52840 bootloading

RE: nRF52840 bootloading

Alethea — Tue, 16 Dec 2025 04:04:00 GMT

[quote userid="2121" url="~/f/nordic-q-a/120284/nrf52840-bootloading/531471"]

Hi Shaked,
You would need the nRF Connect SDK for compiling an application.

My suggestion is to getting started with a Development Kit before transition to your own PCB.
Please follow our devacademy course here: https://academy.nordicsemi.com/courses/nrf-connect-sdk-fundamentals/

Or you can follow the NCS documentation here: https://docs.nordicsemi.com/bundle/ncs-2.9.1/page/nrf/index.html

[/quote]

Thanks for the sharing.

blocky blast puzzle

RE: nRF52840 bootloading

Hung Bui — Fri, 11 Apr 2025 07:41:18 GMT

Hi Shaked,
You would need the nRF Connect SDK for compiling an application.

Or you can follow the NCS documentation here: https://docs.nordicsemi.com/bundle/ncs-2.9.1/page/nrf/index.html

RE: nRF52840 bootloading

Shaked Aharon — Wed, 09 Apr 2025 14:47:51 GMT

Is there a complete hex file for me to use as an example ?
I saw the something on the web, MCU interface i think ?

RE: nRF52840 bootloading

Hung Bui — Wed, 09 Apr 2025 10:48:26 GMT

Hi,
No you don't really need SWO.
Please just type nrfjprog --help you will see the list of command.

Or see here: https://docs.nordicsemi.com/bundle/ug_nrf_cltools/page/UG/cltools/nrf_nrfjprogexe_reference.html

To program you can just type:
nrfjprog.exe --program <yourhexfile>.hex --sectorerase --reset

RE: nRF52840 bootloading

Shaked Aharon — Wed, 09 Apr 2025 10:42:11 GMT

Do i need to connect SWO also ?
Also how do i use the nrfjprog.exe command line tool ? i couldnt find tutorials about it.

RE: nRF52840 bootloading

Hung Bui — Mon, 31 Mar 2025 11:25:50 GMT

Hi Shaked,

I assume you are asking about how to program the chip ? If you are, you just need to connect: SWDIO, SWDCLK , VSS to the programmer. You can use a nRF52 DK as the programmer as well. Just need to use the debug out port (You need to connect the VDDdetect pin so that the DK know that it will have to use the Debug out port). Or it's easier to just use a separate programmer, for example Jlink Base as Anthony suggested.
After you have them , you can use nRF Connect for Desktop app -> Programmer to program or you can use nrfjprog.exe command line tool.

RE: nRF52840 bootloading

AMarch01 — Fri, 28 Mar 2025 12:52:20 GMT

I assume you have a programmer, like the following J-Link BASE Debug Probe .
Connect up common ground and the pins for programming to the debug probe. Power on the board and see if the Debug Probe detects it using the Segger J-Link Flash utility.
A M