Thingy:91 unresponsive after flashing with J-Link

RE: Thingy:91 unresponsive after flashing with J-Link

Øyvind — Tue, 28 Sep 2021 08:05:20 GMT

Hey Grein,

Thanks for sharing. Can you please try to update your JLink drivers? 6.88a is fairly old, and you should have been prompted to install a newer version.

Kind regards,
Øyvind

RE: Thingy:91 unresponsive after flashing with J-Link

Grein — Mon, 27 Sep 2021 21:57:47 GMT

Hi Øyvind,

this is the output you asked:

nrfjprog version: 10.14.0 external
JLinkARM.dll version: 6.88a

[quote userid="77062" url="~/f/nordic-q-a/79983/thingy-91-unresponsive-after-flashing-with-j-link/331335#331335"]Does every nrfjprog command return the same output from your initial post? [/quote]

Yes, every nrfjprog command returns that output.

[quote userid="77062" url="~/f/nordic-q-a/79983/thingy-91-unresponsive-after-flashing-with-j-link/331335#331335"]Have you checked that there is noe issues with the SWD cable?[/quote]

No issue with the SWD cable, it worked well the first time I flashed the device with J-Link.

Here is the log.log file:

devzone.nordicsemi.com/.../3264.log.log

Thank you,

Grein

RE: Thingy:91 unresponsive after flashing with J-Link

Øyvind — Mon, 27 Sep 2021 13:39:43 GMT

Hi Grein,

What version of nrfjprog and JLink are you running? Please run nrfjprog --version and provide the output. Have you checked that there is noe issues with the SWD cable?

Does every nrfjprog command return the same output from your initial post? Can you please provide the generated log.log file as it instructs?

Thanks.

Kind regards,
Øyvind

RE: Thingy:91 unresponsive after flashing with J-Link

Grein — Fri, 24 Sep 2021 15:55:40 GMT

Hi Øyvind,

thank you for the answer. When I flashed the device with the mqtt_simple sample the SWD switch was set to nRF91 (how it is supposed to be, right?).

How can I reprogram the application with J-Link if it is not able to connect to target? If I run J-Link Commander application it reads VTref to 3V so I suppose it is able to see the target, but then if I type "connect" it fails to connect to target ("Connecting to target via SWD - Cannot connect to target") Same thing happens if I try to connect J-Link on Segger embedded studio.

How should I do?

Thank you,

Grein

RE: Thingy:91 unresponsive after flashing with J-Link

Øyvind — Fri, 24 Sep 2021 13:20:16 GMT

Hello,

In what position is the SWD Select switch (SW2) set? Make sure that it is set to nRF91 when programming the nRF91, and to nRF52 when programming the nRF52, when using a JLink external debugger. The onboard nRF52840 is the device managing the connectivity with between the computer and Thingy:91 (running Connectivity Bridge application).

Please reprogram, using JLink EDU mini, the nRF52 with the Connectivity Bridge while SW2=nRF52, then switch SW2 to nRF91 and program the asset tracker application.

Kind regards,
Øyvind