PCA10056 erase error

[mjw]

I'm using a PCA10056 (NRF52840 Preview DK) v0.9.1, and trying to erase the existing firmware, but running into issues.

I've tried nrfjprog -f NRF52 --eraseall with version 9.6.0 of the NRF Tools and version 6.16a of JLink. The log file contains:

• FUNCTION: open_dll.
• FUNCTION: open_dll.
• FUNCTION: enum_emu_snr.
• FUNCTION: enum_emu_snr.
• FUNCTION: enum_emu_snr.
• FUNCTION: enum_emu_snr.
• FUNCTION: connect_to_emu_with_snr.
• FUNCTION: connect_to_emu_with_snr.
• FUNCTION: connect_to_emu_without_snr.
• FUNCTION: enum_emu_snr.
• Device "NRF52832_XXAA" selected.
• FUNCTION: read_device_version.
• FUNCTION: read_device_version.
• JLinkARM.dll CORESIGHT_WriteAPDPReg returned error -1.
• JLinkARM.dll CORESIGHT_WriteAPDPReg returned error -102.
• FUNCTION: close_dll. FUNCTION: close_dll.

When I run nRFgo Studio, I get the following message, and when trying to recover:

My nRFgo Studio is version 1.21.2.10.

I've been able to put the device in bootloader mode, and reload the J-Link OB bootloader image, but this did not make any difference. Another post suggested disabling mass-storage device mode, which I have done through JLink Commander, but still no luck.

Does anyone know what may be wrong with my device?

[mjw]

nrfjprog -f nrf52 --recover --log reports this to the console:

$ nrfjprog -f nrf52 --recover --log

• Recovering device. This operation might take 30s.
• ERROR: Recover failed. Please make sure that the correct device family is given
• ERROR: and try again.

and this to the log file (which is the same as what was logged with --eraseall):

• FUNCTION: open_dll.
• FUNCTION: open_dll.
• FUNCTION: enum_emu_snr.
• FUNCTION: enum_emu_snr.
• FUNCTION: enum_emu_snr.
• FUNCTION: enum_emu_snr.
• FUNCTION: connect_to_emu_with_snr.
• FUNCTION: connect_to_emu_with_snr.
• FUNCTION: connect_to_emu_without_snr.
• FUNCTION: enum_emu_snr.
• Device "NRF52832_XXAA" selected.
• FUNCTION: recover.
• FUNCTION: recover.
• JLinkARM.dll CORESIGHT_WriteAPDPReg returned error -1.
• JLinkARM.dll CORESIGHT_WriteAPDPReg returned error -102.
• FUNCTION: close_dll.
• FUNCTION: close_dll.

A different USB cable gives the same result. I haven't tried a different PC, but the PC works fine with a different PDK board, so I think the PC is okay.

Thanks! (and sorry for the horrible formatting)

[Petter Myhre]

Ok. Then I'm not sure what to suggest. Maybe you can try and program the nRF52840 chip on the bad board with with good board? And/or try to program the nRF52840 chip on the good board with the bad board? By using Debug Out/In and running the chip you want to program from battery. Maybe it can give us some clues.