Did I brick my custom board? "No idcode detected" NRF52840

RE: Did I brick my custom board? "No idcode detected" NRF52840

Elfving — Thu, 10 Mar 2022 09:59:36 GMT

Hey Ryan,

If this is not an issue on the DK there might be something wrong/different on your PCB.

Can you measure the voltage at the reset pin and VDD at DUT directly at the custom board?

Regards,

Elfving

RE: Did I brick my custom board? "No idcode detected" NRF52840

ryerye120 — Tue, 08 Mar 2022 17:41:24 GMT

Hi Elfving,

Thanks for your response!

[quote userid="103347" url="~/f/nordic-q-a/84938/did-i-brick-my-custom-board-no-idcode-detected-nrf52840/356313#356313"]Are you seeing the same issue on a DK? [/quote]

No, all of my DKs seem to work just fine across bluetooth and non-bluetooth examples (and custom firmware)!

[quote userid="103347" url="~/f/nordic-q-a/84938/did-i-brick-my-custom-board-no-idcode-detected-nrf52840/356313#356313"]What SoC are you using on the custom PCB? Could you send me an image of the PCB?[/quote]

It's one of the 7mmx7mm QFN packages!

Trying to erase the custom board with the nrf connect app yielded the same errors. The chips just aren't detected...

Thanks so much for your help Elfving, I really appreciate it!

RE: Did I brick my custom board? "No idcode detected" NRF52840

Elfving — Fri, 04 Mar 2022 13:28:55 GMT

Hello,

Your setup looks fine in my opinion.

Are you seeing the same issue on a DK?

What SoC are you using on the custom PCB? Could you send me an image of the PCB?

[quote user="ryerye120"]I've read that I can erase/recover chips using the nrf connect app on my computer. [/quote]

Sure, you could definitely try it, and it should be possible using both command line and the app.

[quote user="ryerye120"]When using nrf_connect's programmer I can see the dev kit that I'm using as a programmer, but I can't actually see the chip I'm trying to program (the custom board's microcontroller). Is there something I'm missing? I have definitely connected things properly since I can use segger to program working chips with this exact setup.[/quote]

Yeah I can imagine that being a bit confusing, but it is how it is supposed to be. Think of it as the debugger/programmer simply stating its the 52840DK, not what SoC the DK is necessarily programming.

Regards,

Elfving

RE: Did I brick my custom board? "No idcode detected" NRF52840

ryerye120 — Mon, 21 Feb 2022 20:13:41 GMT

Hi Elfving,

I've made a diagram! At the time I used the following setup:

In addition, I powered my external board's VDD with 3V and had the dev kit plugged into my computer's USB. In retrospect, this was really dumb since I probably caused some contention on my VDD_nrf wire...

In my current (working) setup, I'm no longer powering my custom PCB externally. I'm simply running everything off of the dev kit's VDD_nrf (that ultimately comes from my computer's USB).

I've read that I can erase/recover chips using the nrf connect app on my computer. Does that seem like the next step to 'unbricking' my custom pcb's nordic? If so, can I erase/recover my custom pcb's microcontroller by using the above setup (without externally powering the custom board) and running the nrf programmer from the connect app?

Thank you so much for your help, Elfving!

Kindest regards,

Ryan

Edit: When using nrf_connect's programmer I can see the dev kit that I'm using as a programmer, but I can't actually see the chip I'm trying to program (the custom board's microcontroller). Is there something I'm missing? I have definitely connected things properly since I can use segger to program working chips with this exact setup.

RE: Did I brick my custom board? "No idcode detected" NRF52840

Elfving — Mon, 21 Feb 2022 14:04:44 GMT

Hey Ryan,

Could you expand a bit on how you are programming your board? It would be great if you could show a picture of the setup as well.

Regards,

Elfving