nrfjprog no debugger connected

[gaminn]

I get "ERROR: There is no debugger connected to the PC with the given serial number." when I run e.g. nrfjprog --eraseall on command line.

Programming/debugging using VisualGDB or nRFgo Studio works

nrfjprog version: 9.8.1
JLinkARM.dll version: 6.12a

Windows 10

How to erase/program nrf52832 using nrfjprog on command line?

[wlgrd]

It's very weird that it gives the extra "with the given serial number". For me:

nrfjprog --eraseall
ERROR: There is no debugger connected to the PC.

Also, try doing nrfjprog --ids, which will yield something like this:

nrfjprog --ids
50107526

Then, you can do e.g

nrfjprog --eraseall --snr 50107526

If I do (in my specific case) erase with the wrong serial number provided, I get:

nrfjprog --eraseall --snr 50101010
ERROR: There is no debugger connected to the PC with the given serial number.

Hence, it looks like you are providing the serial number in some way or another. 

[gaminn]

I'm not providing the serial number explicitly. When I provide serial number by --snr xxxxxxx I get the same "There is no debugger connected to the PC with the given serial number.".That is weird.

[gaminn]

I have PCA10031 dongle which works with nrfjprog.

[wlgrd]

I don't have any overview of that, but that shouldn't be necessary at all. You have done something else here. Maybe raise this as a support ticket

[gaminn]

I have to run:

"C:\Program Files\Nordic Semiconductor\nrf5x\bin\nrfjprog.exe" -f nrf52 --eraseall
Erasing user available code and UICR flash areas.
Applying system reset.

Then it works.

[wlgrd]

So your .ini file is not set to family UNKNOWN, but to nrf51?

[gaminn]

Both nrfjprog.ini (Program Files and Program Files (x86)) are in its default state, I didn't modify anything.

; nrfjprog.exe configuration file.

[DEFAULT_CONFIGURATION]
; Define the desired family of devices to use by default by nrfjprog.exe when -f or --family arguments are not used. The only valid options are NRF51, NRF52 or UNKNOWN.
; If set to UNKNOWN an automatic family detection will be performed. The autodetect family operation will take time, so it is advised to use correct family if known.
Family = UNKNOWN

; Define the desired clockspeed in kHz you want nrfjprog.exe use by default when -c or --clockspeed arguments are not used. The range of valid values go from 125 kHz to 50000 kHz.
Clockspeed = 2000