Cannot use the SWD between the nRF9160-DK to the Thingy:91

RE: Cannot use the SWD between the nRF9160-DK to the Thingy:91

Christopher Hunt — Wed, 05 May 2021 00:11:00 GMT

Thank you - the "blinky approach" works well!

RE: Cannot use the SWD between the nRF9160-DK to the Thingy:91

Håkon Alseth — Tue, 04 May 2021 14:11:42 GMT

Did you try selecting the nRF91-DK in the programmer app and see if it was able to detect anything at all?

I usually program blinky on my DK, then connect a custom board.

This way, I can see that the DK still blinks even after I program/erase the external device.

Kind regards,

Håkon

RE: Cannot use the SWD between the nRF9160-DK to the Thingy:91

Christopher Hunt — Mon, 03 May 2021 21:03:09 GMT

[quote userid="2115" url="~/f/nordic-q-a/74676/cannot-use-the-swd-between-the-nrf9160-dk-to-the-thingy-91/307938#307938"]

Feel free to take away the film. Both "VDD_IO" settings will work towards programming the DK itself, but for external programming this shall match your external board voltage:

https://infocenter.nordicsemi.com/topic/ug_nrf91_dk/UG/nrf91_DK/hw_debug_out.html?cp=2_0_5_4_11

Christopher Hunt said:
Also to confirm, should I be able to see the Thingy:91 in the nRF Connect drop down when connected via SWD, or not? Thanks.

You will not see the "thingy:91" being detected as a product if programming over SWD.

[/quote]

OK, so I removed the film. It looks to be in the 1.8V setting which also appears to be the factory default.

Perhaps I'm just not verifying that the thingy:91 is being debugged. How can I tell? What tool can help me verify that the nRF9160-dk is connected to the thingy:91? Thanks for your help so far.

RE: Cannot use the SWD between the nRF9160-DK to the Thingy:91

Håkon Alseth — Mon, 03 May 2021 12:46:55 GMT

Hi,

[quote user="Christopher Hunt"]It’s hard to discern if that particular dip switch is set to 1.8v as it is covered with a plastic film. The nRF9160-dk is brand new. Do you know what its factory position is? Should I remove the film covering the dip switch?[/quote]

Feel free to take away the film. Both "VDD_IO" settings will work towards programming the DK itself, but for external programming this shall match your external board voltage:

https://infocenter.nordicsemi.com/topic/ug_nrf91_dk/UG/nrf91_DK/hw_debug_out.html?cp=2_0_5_4_11

[quote user="Christopher Hunt"]Also to confirm, should I be able to see the Thingy:91 in the nRF Connect drop down when connected via SWD, or not? Thanks. [/quote]

You will not see the "thingy:91" being detected as a product if programming over SWD.

Kind regards,

Håkon

RE: Cannot use the SWD between the nRF9160-DK to the Thingy:91

Christopher Hunt — Mon, 03 May 2021 12:29:05 GMT

[quote userid="2115" url="~/f/nordic-q-a/74676/cannot-use-the-swd-between-the-nrf9160-dk-to-the-thingy-91/307923#307923"]A pure SWD debugger will recognize only on a SoC level, not a product level. If you have set your nRF9160-DK in 1.8V operation (VDD_IO dip-switch near the main power switch), it should be able to program your thingy91 directly over SWD.[/quote]

It’s hard to discern if that particular dip switch is set to 1.8v as it is covered with a plastic film. The nRF9160-dk is brand new. Do you know what its factory position is? Should I remove the film covering the dip switch?

Also to confirm, should I be able to see the Thingy:91 in the nRF Connect drop down when connected via SWD, or not? Thanks.

RE: Cannot use the SWD between the nRF9160-DK to the Thingy:91

Håkon Alseth — Mon, 03 May 2021 12:16:00 GMT

Hi,

You are using the nRF9160-DK as a pure programmer over SWD. This will not be able to fully utilize the mcuboot features, as these features require that you connect using the USB serial interface on the thingy91 itself, as per the docs:

https://infocenter.nordicsemi.com/topic/ug_thingy91/UG/thingy91/firmware/pgmming_thingy91.html?cp=13_0_4_0

A pure SWD debugger will recognize only on a SoC level, not a product level. If you have set your nRF9160-DK in 1.8V operation (VDD_IO dip-switch near the main power switch), it should be able to program your thingy91 directly over SWD.

Kind regards,

Håkon