programming custom nRF52840 chip

RE: programming custom nRF52840 chip

Stian Røed Hafskjold — Wed, 07 Apr 2021 11:16:45 GMT

Hi,

You can find the pinout for the 20 pin SWD connector here: https://www.segger.com/products/debug-probes/j-link/technology/interface-description/#swd-and-swo-also-called-swv-compatibility

Best regards,
Stian

RE: programming custom nRF52840 chip

Roshan Prajapati — Wed, 31 Mar 2021 09:06:53 GMT

Hi Stian,

Hope you're doing well.

I have one question. Actually, I want to program my custom board via J-link Flasher PRO and My custom board has SWDIO,SWDCLK,VCC, and GND Headers to program the board. The query is, How do I connect my Flasher PRO (which has 20 pin connector) to program my custom board (which has 4 PIN header). It would also be helpful if you let me know how to use J-link Flasher PRO for programing purpose. Kindly, do the needful.

Best Regards,

Roshan.

RE: programming custom nRF52840 chip

Roshan Prajapati — Mon, 08 Feb 2021 13:21:09 GMT

Fine stian, Thanks for the information.

RE: programming custom nRF52840 chip

Stian Røed Hafskjold — Mon, 08 Feb 2021 11:31:37 GMT

Yes, that is correct.

RE: programming custom nRF52840 chip

Roshan Prajapati — Mon, 08 Feb 2021 11:03:09 GMT

Ok stian, I will try with the P18 & P19 pins as you have mentioned. But, What if I want to program my custom board? Do I want to connect my custom board SWDIO,SWDCLK pins to P20 pin in DK to program?

RE: programming custom nRF52840 chip

Stian Røed Hafskjold — Mon, 08 Feb 2021 09:50:04 GMT

Hi, the P20 header is only for debug output. You need to connect it to the P18 "Debug in" header on the external DK. The easiest is to use a 10 pin SWD cable from P19 "debug out" to P18 "debug in", and connect VDD and GND from the main DK to the external supply header on the external DK.

RE: programming custom nRF52840 chip

Roshan Prajapati — Mon, 08 Feb 2021 08:11:03 GMT

Hi Stian,

I was trying to program nRF52840 DK with external (another) nRF52840 DK. I am using the connections as mentioned below,

1. Main DK of VDD to external DK VDD.

2. VTG(pin 3) & VDD(pin 2) are shorted in main DK.

3. SWDIO and SWDCLK of main DK to external DK (SWDIO,SWDCLK)

4. GND on main DK from P1 -> GND Detect on main DK to P20 to GND Detect on external board on P20.

Above are the connections I made and I am getting error as mentioned below,

1. In nRF connect App: "Could not fetch memory size of target devkit: Error: Error occured when get library info. Errorcode CouldNotOpenDevice (0x4) Lowlevel error: JLINKARM_DLL_ERROR (ffffff9a)".

2. In Segger Embedded Studio: "Failed to connect to target.
No idcode detected.
Please check connection and Target Interface Type".

NOTE : External DK is not connected to any power source. it's only connected to VDD of main DK to VDD of external DK.

Kindly, do the needful.

Best Regards,

Roshan.

RE: programming custom nRF52840 chip

Roshan Prajapati — Mon, 01 Feb 2021 14:19:56 GMT

Ok Stian, we will use nrfjprog to flash our custom board. If anything else, will ping you in the same case. Thanks!!

RE: programming custom nRF52840 chip

Stian Røed Hafskjold — Mon, 01 Feb 2021 08:55:19 GMT

Yes, you can use Segger embedded studio, but I would suggest using nrfjprog inside the Command line tools package. It gives you more options.

https://www.nordicsemi.com/Software-and-tools/Development-Tools/nRF-Command-Line-Tools

RE: programming custom nRF52840 chip

Roshan Prajapati — Mon, 01 Feb 2021 05:57:33 GMT

Hi Stian,

Can we use segger embedded studio directly to flash our custom nRF chip via nRF52840 SWDIO and the SWDCLK pins ?? or we need any separate application to program custom chip?

RE: programming custom nRF52840 chip

Stian Røed Hafskjold — Tue, 22 Dec 2020 13:05:01 GMT

You will have to ask Segger for the production programmer license/hardware:

https://www.segger.com/support/technical-support/

RE: programming custom nRF52840 chip

Roshan Prajapati — Tue, 22 Dec 2020 10:57:44 GMT

Hi,

[quote userid="4556" url="~/f/nordic-q-a/69740/programming-custom-nrf52840-chip/286232#286232"] The nRF52 DK is not designed to be a high volume production programmer.[/quote]

Ya got it and is that any commercial license we should purchase for programming custom board for nRF52840 IC?

Regards,

Roshan.

RE: programming custom nRF52840 chip

Stian Røed Hafskjold — Tue, 22 Dec 2020 08:41:57 GMT

Hi, It depends on your needs. The nRF52 DK is not designed to be a high volume production programmer.

You can check out this application note: https://infocenter.nordicsemi.com/topic/nwp_027/WP/nwp_027/intro.html?cp=16_9

RE: programming custom nRF52840 chip

Roshan Prajapati — Tue, 22 Dec 2020 07:42:43 GMT

Hi Stian,

We have nRF52 DK and we will use this method to program our custom board. But,

Is that safer way to program our custom board for commercial usage through nRF52 DK?

Thanks,

Roshan.

RE: programming custom nRF52840 chip

Stian Røed Hafskjold — Mon, 21 Dec 2020 12:50:18 GMT

Hi, you program the nRF52840 through the SWD bus. You need a debugger that supports the SWD interface. Preferably a JLink debugger. Or, if you have an nRF52 DK you can use the debug out header to program your custom board. You need to connect the debugger to the SWDIO and the SWDCLK pins on your custom board.