Flashing and debugging an external nrf52840 board

RE: Flashing and debugging an external nrf52840 board

Daniel Reisfeld — Mon, 06 May 2019 12:51:33 GMT

Thanks Awneil :) I understand my problem is not related to my SES usage.

Daniel

RE: Flashing and debugging an external nrf52840 board

awneil — Thu, 02 May 2019 13:46:01 GMT

[quote userid="67166" url="~/f/nordic-q-a/46732/flashing-and-debugging-an-external-nrf52840-board/184698"]Is there a way to directly use SES to flash in a non-debug mode[/quote]

Yes:

RE: Flashing and debugging an external nrf52840 board

Amanda Hsieh — Thu, 02 May 2019 13:30:58 GMT

Hi Daniel,

[quote user="danielReisfeld"]My problem is that straight forward use of SES puts my board's VDD in 3V instead of the default 1.8V and pin 1.09 is trace rather than GPIO.[/quote]

It depends on the power sources. If powered at J2(USB on the short side), it's 3V, as shown in the table of VDD power sources. . If powered at J3 (USB on long side labled nRF USB), the REGOUT0 value is used (High voltage mode).

Debug input and trace indicates p1.09 is TRACEDATA[3].

[quote user="danielReisfeld"]Is there a way to directly use SES to flash in a non-debug mode?[/quote]

It should be fine to use SES directly.

-Amanda

RE: Flashing and debugging an external nrf52840 board

Daniel Reisfeld — Thu, 02 May 2019 12:20:00 GMT

Owneil,

REGOUT0 is set to 3V (and so is indicated by measurements). I don't understand why it is not the default 1.8V.

Is my question clearer now?

Thanks,

Daniel

RE: Flashing and debugging an external nrf52840 board

awneil — Wed, 01 May 2019 20:24:56 GMT

Sorry - what do you mean by, "get 3V" ?

Perhaps post your schematic, and highlight where you're measuring?

RE: Flashing and debugging an external nrf52840 board

Daniel Reisfeld — Wed, 01 May 2019 19:34:12 GMT

Awneil,

I understand that the DK works with 3V. I don't understand how this happens. When I use the DK and SES to flash my board following by detaching the DK further following by resetting my board, I still get 3V although the documentation says the default is 1.8V.

Daniel

RE: Flashing and debugging an external nrf52840 board

awneil — Wed, 01 May 2019 14:00:29 GMT

The debug out from the DK only supports 3V targets. This is a property of the DK hardware - nothing to do with SES.

For a 1.8V target, you will need to buy a standalone JLink.

(other debug probes are available, but won't work with SES).

RE: Flashing and debugging an external nrf52840 board

Daniel Reisfeld — Wed, 01 May 2019 12:39:02 GMT

Thanks Amenda,

My problem is that straight forward use of SES puts my board's VDD in 3V instead of the default 1.8V and pin 1.09 is trace rather than GPIO. Is there a way to directly use SES to flash in a non-debug mode?

Best,

Daniel

RE: Flashing and debugging an external nrf52840 board

Amanda Hsieh — Mon, 29 Apr 2019 13:07:13 GMT

Hi,

Please see the reply in the below:

[quote user=""]1. Can I use the Segger Embedded Studio directly or do I need to use another program? [/quote]

Yes, you can directly use Segger Embedded Studio to debug.

[quote user=""]2. What is the flashing command/procedure? [/quote]

You can refer to Programming nRF5x SoCs with nrfjprog

[quote user=""]3. Do I need to wire any pin except the two SWD ones?[/quote]

Please refer to this thread and Debug output.

Best regards,

Amanda