nrf52840 Border Router Issues

[Moshe Heletz]

I've been having several issues with the nRF52840 so far:

Issue 1: 

When trying to flash an nRF52840 with NCP firmware using a Segger JLink, I connected the SWDIO and SWCLK pins on the device to the JLink, and powered the device over my computer's USB connection. I used Segger Embedded Studio to flash the firmware, but it failed to flash and seemingly erased the chip. I can no longer put the device into firmware replacement mode by pushing the reset button on the chip. I tried to connect to the device using JLinkExe, but this doesn't work and I get the following error message:

Device "NRF52840_XXAA" selected.

Connecting to target via SWD
InitTarget() start
InitTarget() end
Found SW-DP with ID 0x2BA01477
InitTarget() start
InitTarget() end
Found SW-DP with ID 0x2BA01477

****** Error: DAP error while reading DP-Ctrl-Stat register.
InitTarget() start
InitTarget() end
Found SW-DP with ID 0x2BA01477
InitTarget() start
InitTarget() end
Found SW-DP with ID 0x2BA01477
Cannot connect to target.

The speed is set to 500KHz and the device is set as NRF52840_XXAA.

Issue 2:

I also tried to get the OpenThread Border Router working using nRFConnect, which was able to flash the devices. I was able to launch the Border Router successfully. I don't know if the Thread Network between the NCP and the external SoC (Thread CLI device) worked or noe because when I tried to ping the address for 8.8.8.8 (Google Public DNS) which was 64:ff9b::808:808 it  did not work. I was also unable to ping ipv6.google.com (2607:f8b0:4005:809::200e). 

Does someone know what is wrong in these scenarios? Thank you. 

[Edvin]

Hello

Issue 1: 

Try to use Nordic Command Line Tools, and use the command "nrfjprog --recover". What does it say if you try this?

 

Issue 2:

 I suppose you have followed this guide, is that correct?

If so, where did you find the IP address that you are using? Try the addresses that you find in that guide.

BR,

Edvin