board nrf52832 does not connect anymore

[jean-marc]

I am following the BLE accademy course and flashing an exercise, the exercise did not perform as requested.

I could not flash anymore.

I clear the board from the switch button and then could not connect the board anymore even I coud see it by the JLINK or nrfConnect or Teraterm.

I tried several version of JLINK without success.

I then made a power ON with the IfBoot pressed and the board now act strangely.

The board led flash every second for a while and is visible on the USB but then flash rapidly and disapear from the USB.

Reading manuals I do not understand what to upload here, what file, how...

Some manual indicate the use of nrfGo which is obsolete... I am completly lost.

Thank you for some hints to start again.

JLINK 780c

nRF Connect 4.2.0

[Håkon Alseth]

Hi,

 

The board led flash every second for a while and is visible on the USB but then flash rapidly and disapear from the USB.

Holding down this button and powering up will place the nRF52-DK in bootloader mode.

In this mode, where the X:\BOOTLOADER drive is enumerated, you shall not flash anything other than the jlink binary file, or the cmsis daplink binary.

Here's a direct link to the jlink recovery binary: https://nsscprodmedia.blob.core.windows.net/prod/software-and-other-downloads/dev-kits/nrf5x-dk-files/j-link-ob-sam3u128-v2-nordicsemi-170724.bin

 

Found on this site: https://www.nordicsemi.com/Products/Development-hardware/nRF52-DK/Download?lang=en#infotabs

 

If you flashed another file than the jlink/cmsis dap fw while the device is in bootloader state, you can brick the board.

 

Does your board enumerate as a usb device at all now?

 

Kind regards,

Håkon

[jean-marc]

Great you fixed my bootloader problem. Thanks a lot Håkon Alseth 

Now I am back to the original problem :-(

With nRFConnect I get such messages: "Note: no pre-compiled firmware is available for the selected device."

or also this message "Unsupported device. The detected device could not be recognized as neither JLink device nor Nordic USB device."

I can connect thru TeraTerm.

I can see my board with nRFConnect, but cannot select it.

With VSCode I cannot see anymore my board connected, which was working before with VSCode

[Håkon Alseth]

Hi,

 

jean-marc said:

Great you fixed my bootloader problem.

Great to hear that the board is one step closer to working!

 

jean-marc said:

I can connect thru TeraTerm.

I can see my board with nRFConnect, but cannot select it.

It is good that you can connect to the COM port, that means that the board itself works as intended.

 

jean-marc said:

With nRFConnect I get such messages: "Note: no pre-compiled firmware is available for the selected device."

Which application within nrf connect for desktop is reporting this?

 

What we can try is to use nrfjprog, the command line tool, directly.

* Open up a cmd prompt

* write "nrfjprog --recover -f nrf52 --log"

 

If it fails, please attach the "log.log" file generated.

 

Kind regards,

Håkon

[jean-marc]

Håkon Alseth thank you for your precious help.

--recover failed, here are the error on the vscode terminal:

[error] [ Worker] - An unknown error.
[error] [ Client] - Encountered error -21: Command recover executed for 152 milliseconds with result -21
ERROR: Recover failed. Please make sure that the correct device family is given
ERROR: and try again.

Sorry, no idea on how to attach a file :-(

[Håkon Alseth]

Hi,

 

The log file should be created in the folder where you ran the command from.

To insert the file here, you can drag-and-drop it into the reply box.

 

Or you can go to:

Insert -> Image/Video/file

Then press the "upload" button - which will effectively work as "browse" button, and you can navigate to the file you want to upload.

jean-marc said:

ERROR: Recover failed. Please make sure that the correct device family is given

Did you call it with the "nrfjprog --recover -f nrf52" option?

 

Kind regards,

Håkon