"No idcode detected" error on PCA10056 V1.0.0

[Vitaly]

Hi,

During evaluation of both nRF52840 Dev Kit and Dongle somehow the Dev Kit bootloader was erased. We were able to flash MCU firmware, but now J-Link is not able to connect to the target device - reporting "No idcode detected". We tried both from Segger Studio on Mac, JLink Commander on Win10 and nrfjprog on both Windows and Mac.

"nrfjprog --recover" doesn't help.

It looks like nRF52840 bootloader was erased as well and now the target is not able to communicate with MCU/J-Link. Is there any way to fix it? For example, is it possible to install the target bootloader thru nRF52840 own USB?

Thanks,

Vitaly

[Jørgen Holmefjord]

Hi,

Did you try to reflash the J-Link Interface MCU firmware? Hold the IF BOOT/RESET button while powering the board and drag the BIN file to the BOOTLOADER removable drive.

Best regards,
Jørgen

[Jørgen Holmefjord]

Have you modified the DK in any way (for instance for current measurement)? What position are all the switches on the DK in?

[Vitaly]

As far as I know, no modifications. Developer burned some example intended for dongle.

Switches:

LiPo/VDD/USB - VDD

nRF only/ default - default

Are there any jumpers to check?

Thanks!