nRF52 DK debug-out to Laird BL651 module

RE: nRF52 DK debug-out to Laird BL651 module

Andreas — Tue, 11 Dec 2018 12:16:26 GMT

Hi,

Just keep in mind that nRFgo Studio is no longer being maintained, and has not been updated for quite some time. As such, experiences might be iffy, you should consider using nrfjprog or nRF Connect for Desktop for programming your board if you run into any trouble with nRFgo Studio.

Best regards,

Andreas

RE: nRF52 DK debug-out to Laird BL651 module

awneil — Tue, 11 Dec 2018 09:05:58 GMT

That link only shows the pinout of the connector on the DK!

You need to show the schematic of how you have connected that to your board - and how your board connects its connector to the nRF chip.

RE: nRF52 DK debug-out to Laird BL651 module

Gavin Chung — Tue, 11 Dec 2018 08:34:49 GMT

Yes, ground connection.

my wiring is following below link

https://devzone.nordicsemi.com/f/nordic-q-a/21659/nrf52-p19-external-programming

Understood it is hard to fix it remotely.

I am good to work with laptop now.

RE: nRF52 DK debug-out to Laird BL651 module

awneil — Tue, 11 Dec 2018 08:29:16 GMT

[quote userid="75690" url="~/f/nordic-q-a/41411/nrf52-dk-debug-out-to-laird-bl651-module/161121"]no differences between PC and laptop[/quote]

The big difference between a laptop & a desktop PC is that a desktop will usually be grounded via its mains supply cable, whereas a laptop won't.

A laptop will be "floating".

[quote userid="75690" url="~/f/nordic-q-a/41411/nrf52-dk-debug-out-to-laird-bl651-module/161121"]group creation[/quote]

Do you mean, "ground connection" ?

You still haven't shown your schematic of how you connect the DK to your board.

Do you have experienced colleagues/supervisors/teachers locally who can help you? This kind of thing is really hard to diagnose remotely!

RE: nRF52 DK debug-out to Laird BL651 module

Gavin Chung — Tue, 11 Dec 2018 08:15:33 GMT

Hard to tell, looks no differences between PC and laptop.

And the group creation to my board and nRF52_DK is same, exactly same cable.

if assumes computer group issue then how is on board nRF52832 works properly. honestly, I have no idea. if there has anyone know how to fix it, please let me know, I do need back to working on project.

Anyway, thanks for help.

Gavin

RE: nRF52 DK debug-out to Laird BL651 module

awneil — Tue, 11 Dec 2018 08:08:01 GMT

A grounding issue?

RE: nRF52 DK debug-out to Laird BL651 module

Gavin Chung — Tue, 11 Dec 2018 07:57:21 GMT

Hi Awneil,

Found root cause not don't know how to fix it.

The debug out not works in my desktop computer (win10) but it works in my laptop computer (win10). The cable are same and confirm nRFgo and Jlink version are exactly same too.

Any thought?

Thanks.

RE: nRF52 DK debug-out to Laird BL651 module

Gavin Chung — Mon, 10 Dec 2018 12:24:25 GMT

Hi Awneil,

Thanks for promp reply.

The schematic shows in below link, I was study many of your answers in DevZone.

https://devzone.nordicsemi.com/f/nordic-q-a/21659/nrf52-p19-external-programming

The SWD, VCC detect, ground and reset are connected, the our board is use local power, so VCC detect in nRF52_DEV is connect to local power of our PCBA

The BL651 support SWD interface without special considerations, do you know the way how to test my nRF52_DK debug output interface? I did measure SWD wires in oscilloscope , both are signal on it when I try to connect device. just don't know why not work.

Thanks,

Gavin

RE: nRF52 DK debug-out to Laird BL651 module

awneil — Mon, 10 Dec 2018 12:01:58 GMT

[quote userid="75690" url="~/f/nordic-q-a/41411/nrf52-dk-debug-out-to-laird-bl651-module"]does nRF52 debug-out supports BL651 module?[/quote]

The nRF52 DK - or, more specifically, its onboard JLink - neither knows nor cares anything about the module; all it sees is the chip on the SWD interface.

Have you checked with Laird if their module supports an external debugger and, if it does, whether there are any special considerations?

EDIT

[quote userid="75690" url="~/f/nordic-q-a/41411/nrf52-dk-debug-out-to-laird-bl651-module"]Pretty sure wiring is correct[/quote]

So post a schematic of your connection.

Have you remembered to connect GND and VDD - as well as the SWD and Reset lines ?