nRF5340-DK programming issue

[chcnuhk]

Hi,

We are using nRFProgrammer v2.0.1.

After 'Erase All' for nRF5340-DK and power off-on it.

nRFProgrammer seems hang over there. below is the screen capture.

I seek development zone and found below suggestion. Using below statement to recover the board.

nrfjprog -f NRF53 --recover --coprocessor CP_NETWORK

nrfjprog -f NRF53 --recover

Yes, it works.

Do you have any comment on it? Is this a bug on nRFProgrammer? 

BR,

Charles

[yoyou]

Hi chcnuhk,

please try J-Flash in Jlink7.52,

It will satisfy you.

best regards

[dejans]

Hi,

I would appreciate if you could provide sequentially all the steps that you made. In that case I could possibly reproduce the problem.

Best regards,

Dejan

[chcnuhk]

Hi,

I am using nRF5340-DK. 

nRFProgrammer v2.0.1

After i connect nRF5340-DK, i select 'Erase All'. After its finish, i switch off nRF5340-DK.

later, i switch nRF5340-DK again and connect it to nRFProgrammer.

It shows below.

The system seems hang over there.

BR,

Charles

[dejans]

Hi,

I reproduced the problem with the Programmer application.

My setup consisted of Windows 10 Enterprise, nRF5340 DK (PCA10095, 2.0.0), Programmer 2.0.1 and Visual Studio Code v1.62.3. I used "Hello World" example with build configuration for the board nrf5340dk_nrf5340_cpuapp. I flashed the program successfully and could read the content. 
After pressing "Erase All" in the Programmer and switching OFF and ON, I got the same result. Power cycling the device enables readback protection. Option --recover in nrfjprog command disables the readback protection so that flashing can be performed again and option --recover is required after each power cycle. 

[chcnuhk]

Hi,

This is good to hear that you can re-produce the same situation. We will try using nrfjprog --recover to overcome this issue.

If either core (application core or Network core) is readout protected, can nrfjprog --recover can overcome this matter?

say, like below.

I read out application note nAN42, nRF5340 production programming. How can we use nRFjprog to meet production programming flow? Do you have any examples (batch file) for reference?