nRF52840 Dongle Firmware Flash

RE: nRF52840 Dongle Firmware Flash

Storvagun — Thu, 21 Feb 2019 13:28:45 GMT

Ok, for the future generations - it was the cable problem.

to be more specific, pinout of the cable connecting Cortex M Adapter and nRF52840 Dongle was not correct - SWCLK signal was missing on the dongle. This caused all problems.

Jørgen, thanks again for the support.

I had to weld wires directly to the board, but I'm now able to flash it.

RE: nRF52840 Dongle Firmware Flash

Jørgen Holmefjord — Wed, 20 Feb 2019 21:17:03 GMT

I do not see anything that could cause this, except connection issues. Can you check with a multimeter if there are connection between the SWDIO/SWDCLK pinout on the adapter you have in the J-Link Plus to the SWDIO/SWDCLK pads on the dongle close to the USB port, to be absolutely certain that there is not some issue with connection/cable?

RE: nRF52840 Dongle Firmware Flash

Storvagun — Tue, 19 Feb 2019 17:46:12 GMT

Unfortunately, I have no nRF5x DK to work with.

The dongle was plugged in USB, otherwise I get different kind of error which signals that I'm missing power.

Below is what I tried.

Case A:

1. Plug in the dongle in USB, and Plug in JLink in USB.

2. Execute nrfjprog to try to flash zephyr.hex to dongle.

3. Immediately after I execute nrfjprog, red led starts pulsating.

4. JLinkARMDLL.dll problem appears.

5. Nothing is flashed.

Case B:

1. Plug in the dongle in USB, and Plug in JLink in USB.

2. Press "Reset" button -> Red LED starts pulsating

3. Execute nrfjprog to try to flash zephyr.hex to dongle

4. JLinkARMDLL.dll problem appears.

5. Nothing is flashed.

This is exact nrfjprog command I executed:

nrfjprog --program zephyr.hex -f NRF52 --snr 609301412 --sectoranduicrerase

Also, I've tried both of these scenarios on Win10 PC, and on Ubuntu 18.04 LTS.

I'm a little desperate now.

RE: nRF52840 Dongle Firmware Flash

Jørgen Holmefjord — Tue, 19 Feb 2019 15:56:25 GMT

You do not have a nRF5x DK that you could try as a debugger instead of the J-Link? The Dongle should be plugged in a USB port when it is flashed, but I understand that you did this? You should anyway get a different error if the dongle was not powered.

The glowing light indicate that the dongle is in bootloader mode, is this not the case before you try to flash it with the J-Link?

RE: nRF52840 Dongle Firmware Flash

Storvagun — Tue, 19 Feb 2019 12:52:50 GMT

I have flashed multiple ATMEL boards with this same JLink, so I believe it works correctly.

So immediately after the nrfjprog command is executed, red LED starts pulsating on the nRF52840 dongle.

It's strange that the nRF chip is not found, since this dongle works just fine with nRF Connect software.

So it must be something on the nrfjprog/JLink side.

EDIT : I've tried with another JLink Plus adapter - no success. Still the same error message.

RE: nRF52840 Dongle Firmware Flash

Jørgen Holmefjord — Tue, 19 Feb 2019 12:43:09 GMT

Have you tested to flash any of our development kits with the same J-Link? I tested a J-Trace Pro with the dongle, and I'm able to flash it just fine with nrfjprog.

Error -102 from JLinkARM.dll indicate that the nRF chip was not found.

RE: nRF52840 Dongle Firmware Flash

Storvagun — Tue, 19 Feb 2019 07:35:02 GMT

Hi Jørgen,

Sorry - I've sen't the wrong picture, the dongle was plugged correctly - I've taken care that pins match.

This is correct connected state, and only this is how I attempted to perform flash.

Still the same problem:

C:\Users\vladimir\zephyr\samples\bluetooth\hci_uart\build>ninja flash
[0/1] Flashing nrf52840_pca10059
Using runner: nrfjprog
Flashing file: C:/Users/vladimir/zephyr/samples/bluetooth/hci_uart/build/zephyr/zephyr.hex
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.
error: command exited with status 33: nrfjprog --program C:/Users/vladimir/zephyr/samples/bluetooth/hci_uart/build/zephyr/zephyr.hex -f NRF52 --snr 609301412 --sectoranduicrerase
run as "west -v ... flash ..." for a stack trace

nrfjprog return code is 33, and based on now outdated document - it's what we already knew - some kind of JLinkARM.dll problem.

RE: nRF52840 Dongle Firmware Flash

Jørgen Holmefjord — Mon, 18 Feb 2019 20:54:56 GMT

It could look like you have mounted the socket the wrong way on the image, the opening on the socket should face this way (towards pin 1 on the solder pads):

RE: nRF52840 Dongle Firmware Flash

Storvagun — Mon, 18 Feb 2019 17:48:59 GMT

Hi,

thanks for the quick answer.

Yes, the dongle is connected to the JLink through the 9 pin Cortex M adapter.

Alltogether, it looks like this:

I believe the pinouts are correctly connected.

Also, I've tried with power supply over JLink and without it. Both cases produce the same error.

To reiterate - when executing nrfjprog command, both dongle and the JLink were plugged in the PC. Immediately after starting nrfjprog, red LED started pulsing slowly on the dongle.

Best Regards,

Vladimir

RE: nRF52840 Dongle Firmware Flash

Jørgen Holmefjord — Mon, 18 Feb 2019 14:59:13 GMT

Hi,

How have you connected the J-Link to the dongle?

Best regards,
Jørgen