External J-LINK to flash nRF52840 DK chip

RE: External J-LINK to flash nRF52840 DK chip

Vidar Berg — Wed, 15 May 2024 11:34:43 GMT

Please create a new ticket using the 'support+' button next to the search bar to post your question. The error message suggest that you are not passing a valid path to your binary file.

RE: External J-LINK to flash nRF52840 DK chip

Tan Ho — Wed, 15 May 2024 11:24:12 GMT

Can anyone know that problem?

RE: External J-LINK to flash nRF52840 DK chip

Tan Ho — Tue, 14 May 2024 00:53:49 GMT

I am sorry that I post my question on this forum because I cannot find a button to post.

I also use a J-LINK EDU mini to flash the RAK4631 board. During J-Link Commander, I cannot open file "C:\demo\seggerdemo.bin 0x0" as the video instruction.

www.segger.com/.../

How can I open that file?

RE: External J-LINK to flash nRF52840 DK chip

Vidar Berg — Thu, 25 Jan 2024 16:26:09 GMT

Glad to hear you found the problem and thanks for the update. I hadn't thought of this. The connector on the DK has a slot to prevent incorrect orientation, but it sounds like the connector on the J-Link didn't have that.

RE: External J-LINK to flash nRF52840 DK chip

Lewy2552 — Thu, 25 Jan 2024 16:23:47 GMT

Sorry for the spam, I was just updating with each step I found. It works now. Just flipping the way the wire was attached on the J-LINK device was the cause

RE: External J-LINK to flash nRF52840 DK chip

Lewy2552 — Thu, 25 Jan 2024 16:22:01 GMT

I decided to flip the way the wire was connected to the jlink and got this error message instead.

Preparing target for download
Executing Reset script TargetInterface.resetAndStop()
Reset: Halt core after reset via DEMCR.VC_CORERESET.
Reset: Reset device via AIRCR.SYSRESETREQ.
Reset: SYSRESETREQ has confused core.
Failed to power up DAP
Reset: Using fallback: VECTRESET.
Reset: Halt core after reset via DEMCR.VC_CORERESET.
Reset: Reset device via AIRCR.VECTRESET.
Reset: VECTRESET has confused core.
Reset: Using fallback: Reset pin.
Reset: Halt core after reset via DEMCR.VC_CORERESET.
Reset: Reset device via reset pin
Reset: VC_CORERESET did not halt CPU. (Debug logic also reset by reset pin?).
Reset: Reconnecting and manually halting CPU.
Failed to power up DAP
CPU could not be halted
Reset: Core did not halt after reset, trying to disable WDT.
Reset: Halt core after reset via DEMCR.VC_CORERESET.
Reset: Reset device via reset pin
Reset: VC_CORERESET did not halt CPU. (Debug logic also reset by reset pin?).
Reset: Reconnecting and manually halting CPU.
Failed to power up DAP
CPU could not be halted
Reset: Failed. Toggling reset pin and trying reset strategy again.
Failed to power up DAP
Reset: Halt core after reset via DEMCR.VC_CORERESET.
Reset: Reset device via AIRCR.SYSRESETREQ.
Reset: SYSRESETREQ has confused core.
Failed to power up DAP
Reset: Using fallback: VECTRESET.
Reset: Halt core after reset via DEMCR.VC_CORERESET.
Reset: Reset device via AIRCR.VECTRESET.
Reset: VECTRESET has confused core.
Reset: Using fallback: Reset pin.
Reset: Halt core after reset via DEMCR.VC_CORERESET.
Reset: Reset device via reset pin
Reset: VC_CORERESET did not halt CPU. (Debug logic also reset by reset pin?).
Reset: Reconnecting and manually halting CPU.
Failed to power up DAP
CPU could not be halted
Reset: Core did not halt after reset, trying to disable WDT.
Reset: Halt core after reset via DEMCR.VC_CORERESET.
Reset: Reset device via reset pin
Reset: VC_CORERESET did not halt CPU. (Debug logic also reset by reset pin?).
Reset: Reconnecting and manually halting CPU.
Failed to power up DAP
CPU could not be halted
CPU could not be halted
Failed to halt CPU.
CPU could not be halted

RE: External J-LINK to flash nRF52840 DK chip

Lewy2552 — Thu, 25 Jan 2024 16:18:32 GMT

Interesting. Yes, I have been able to use the on-board debugger for some time now. This was just a recent thing that I have been trying to learn how to use the external debugger.

There would not be a driver or anything that I may be missing?

RE: External J-LINK to flash nRF52840 DK chip

Vidar Berg — Thu, 25 Jan 2024 16:15:52 GMT

I've tried to replicate your setup, but I have not been able to reproduce the issue. Just to confirm, I assume you are able to program the nRF52840 with the on-board debugger?

My setup:

J-Link Commander:

RE: External J-LINK to flash nRF52840 DK chip

Lewy2552 — Thu, 25 Jan 2024 15:55:40 GMT

Just tried that, it is giving me the same message on segger and jlink. Tried with both in default mode and nrf only mode

RE: External J-LINK to flash nRF52840 DK chip

Vidar Berg — Thu, 25 Jan 2024 15:52:47 GMT

I see now that you selected the JTAG interface in J-Link Commander. However, the nRF chip does not have a JTAG interface. Please use SWD instead.

RE: External J-LINK to flash nRF52840 DK chip

Lewy2552 — Thu, 25 Jan 2024 15:36:33 GMT

Hello,

Unfortunately it did not seem to do anything rather than turn off the on board LED's. When I ran segger/J-LINK commander, I got the same pop up message. Additionally, I am still getting the pop up message telling me the J-LINK edu mini should only be used for educational purposes. What is reassuring about the pop up message is that I only get that when the nrf is properly powered. Is there any other ideas by chance?

Here are the pop up messages and board:

RE: External J-LINK to flash nRF52840 DK chip

Vidar Berg — Thu, 25 Jan 2024 12:17:07 GMT

Hello,

I don't see anything wrong with your setup (thank you for including the picture). As a test, could you please set the switch shown in the picture below to the 'nRF Only' position and try again? This will disconnect the on-board debugger from the nRF target.

Best regards,

Vidar

RE: External J-LINK to flash nRF52840 DK chip

Lewy2552 — Wed, 24 Jan 2024 15:50:11 GMT

Here is also an image of my connections as I believe this would also be important to see