Cannot connect to external nRF52832, no idcode detected

RE: Cannot connect to external nRF52832, no idcode detected

awneil — Thu, 03 Jan 2019 02:02:20 GMT

[quote userid="76009" url="~/f/nordic-q-a/41820/cannot-connect-to-external-nrf52832-no-idcode-detected/163593"]my 10 pin connector on my board doesn't have the standard ARM coresight[/quote]

Why not?

Life is so much easier when you stick to established standards ...

RE: Cannot connect to external nRF52832, no idcode detected

Nguyen Hoan Hoang — Thu, 03 Jan 2019 00:27:10 GMT

Then may be try a reflow of your board. Could be a cold solder.

RE: Cannot connect to external nRF52832, no idcode detected

ronpetit — Wed, 02 Jan 2019 22:44:22 GMT

I still can't, my 10 pin connector on my board doesn't have the standard ARM coresight, so the pins positions is not the same as the debug out on the DK, I really need to stick with the P20, but still don't get what is wrong with my nRF52832 and why the JLink cannot connect to it

RE: Cannot connect to external nRF52832, no idcode detected

Nguyen Hoan Hoang — Wed, 02 Jan 2019 20:49:51 GMT

You can find the cable here https://www.tindie.com/products/hnhoan/ribbon-cable-15-cm-6-long/

select the 10 pins 1.27mm pitch.

You can use the P20 for sure but the wiring on your 10 pins connector does not seem correct. See pin out here http://www.keil.com/support/man/docs/jlink/jLink_connectors.htm

RE: Cannot connect to external nRF52832, no idcode detected

ronpetit — Wed, 02 Jan 2019 19:56:08 GMT

I still don't get why the P20 pins are not working, I will try out that cable to see if it works

RE: Cannot connect to external nRF52832, no idcode detected

awneil — Wed, 02 Jan 2019 19:40:40 GMT

[quote userid="76009" url="~/f/nordic-q-a/41820/cannot-connect-to-external-nrf52832-no-idcode-detected/163554"] find a connector that fits[/quote]

https://uk.farnell.com/samtec/ffsd-05-d-04-00-01-n/ribbon-cable-idc-1-27mm-4inch/dp/2308531?CMP=i-ddd7-00001003

RE: Cannot connect to external nRF52832, no idcode detected

ronpetit — Wed, 02 Jan 2019 19:21:24 GMT

Yes, on my custom board I have a standard ARM coresight of 10 pins, however I have no wires to attach it to the Debug Out on the DK, are you sure is incorrect to use P20 instead?, I can try to find a connector that fits

RE: Cannot connect to external nRF52832, no idcode detected

ronpetit — Wed, 02 Jan 2019 19:17:01 GMT

Hello Hung,

Yes. I checked VTG, however It has 2.9V is that enough?

I reduced the length of the wires going to SWDIO and SWDCLK, I'm pretty sure they are now less than 10cm, I checked continuity from the female jumper's plate on the nRF52 DK to the nRF chip itself and everything seems ok, however I still cannot connect to the nRF chip through JLink.

The log.log file doesn't hint anything?, I cannot tell if my custom PCB is the problem as I checked everything and it seems to be fine, I also tried to run everything as root but got the same errors.

Any other suggestion?

RE: Cannot connect to external nRF52832, no idcode detected

Nguyen Hoan Hoang — Wed, 02 Jan 2019 18:46:11 GMT

Is the SWD connector on your custom board a standard ARM coresight 10 pins ? If so, your wiring seems to be incorrect. You can use the Debug Out on the DK to connect to it if yours is coresight and add VDD & GND.

RE: Cannot connect to external nRF52832, no idcode detected

Hung Bui — Wed, 02 Jan 2019 15:50:30 GMT

Hi,

I assume you checked and found the VTG has 3.3 V ?

Please check if SWDIO and SWDCLK connected correctly. I would suggest to shorten the length of the 2 cables. Keep it less than 10cm. Check the pins of the chip, make sure they are soldered correctly.

RE: Cannot connect to external nRF52832, no idcode detected

ronpetit — Fri, 28 Dec 2018 19:55:08 GMT

Hello Hung, okay, here is the setup:

Please look closely, there is a green wire coming out from nRF5 DK to the bottom right corner of my custom PCB (On J5), that's the positive input of my PCB, and the black wire is ground. Now, I have J3 on the top right corner, that's where the connectio to SWDIO and SWDCLK is made, the yellow one is SWDIO and the green one is SWDCLK, the blue one goes to VTG, as the PCB is powered by the nRF5 DK if the power goes through well J3 should have VDD too, so the nRF5 DK will receive the signal to program the external chip.

Now, I'm 100% sure that my connections over J3 goes to SWDIO and SWDCLK as I checked continuity multiple times, once I power up the nRF5 DK I can measure 2.9V over pins 48 and 45 in the nRF52832, so I believe it have power.

What I'm doing wrong?

I also ran this command to test nrfjprog:

nrfjprog -f NRF52 --program ble_app_uart_pca10040_s132.hex --chiperase --log

The output was the following error:

ERROR: JLinkARM DLL reported an error. Try again. If error condition
ERROR: persists, run the same command again with argument --log, contact Nordic
ERROR: Semiconductor and provide the generated log.log file to them.

And here is the log.log file:

devzone.nordicsemi.com/.../2018.log.log

Any hints?, if you need any other explaination please let me know

I don't know if I already mention it but I'm using ubuntu

RE: Cannot connect to external nRF52832, no idcode detected

Hung Bui — Thu, 27 Dec 2018 05:44:16 GMT

Hi Ronald,

It seems correct the way you connect your external board. Could you try using nrfjprog.exe (or Jlink) tool to access the chip ?

Please send us a close up photo of your setup as well. You can convert this case to private case if there is confidential information.