issue with nrf5340pdk not executing the firmware

[Vojislav]

Hi, 

I have a problem with nrf5340pdk not executing the firmware. I have to build a hello_world sample from ncs v1.4.99-dev1 and I flash the development kit with the west tool, but I do not get any output. The same is with the blinky example. Also when using nrfjprog I can do reset and recover without a problem. This board was working before, but at one moment it stoped and since there is no additional hardware I am not sure why, especially since the firmware is flashing. 

In the end, I tried nRF Connect for desktop. There I get some errors when validating the flashed firmware:

what could be the issue for this kind of behavior?
Best regards,
Vojislav

[Heidi]

Hi! 

I'm sorry about the slow response. I just wanted to let you know that I'm looking into your case now. 

Best regards,

Heidi

[Vojislav]

I suppose that it is something wrong with the nrf53 chip.

when I do:
west flash --recover
everything is erased ok

but then I do:
west flash
and i get this response:

I know this should be working since I have a new nrf53dk that can be flashed

Best regards,
Vojislav

[Heidi]

Could you run the command with the argument --log and provide me with the resulting log file? So we can take a look at the full log file.

[Vojislav]

Hi Heidi,

Here is the log file you asked for. 
The command was: west flash --tool-opt="--log"

5810.log.log

[Heidi]

Thanks. It looks like it's failing to halt the chip during the erasing for some reason. You can try power-cycling and then trying again? If that doesn't work we will take a closer look tomorrow.

[Vojislav]

Hi Heidi,

Now it seems to work. What I did was:
1. run: nrfjprog --recover
2. power cycle the board and connect it to the USB port on the laptop instead of the USB hub (this could be a potential issue)
3. run: west flash --tool-opt="--log"


it probably has something to do with USB ports or chip memory when reading and writing. But the main thing is that it is working.

Thank you for your help!