PCA10056 PDK is dumb now

[DanielDuan277]

Hello,

I accidentally set my board in boot mode and then lost power, then after power on again, the board seems in a total dumb mode: invisible in Device Manager, LED5 is always off, can't be accessed by nordic command tool.

I have tried holding IF RESET/BOOT button during power cycle for several times but nothing changed.

Seems the interface MCU(ATSAM3U2C) has lost its bootloader, where can I get the bootloader for it? And how to program it?

More information:

Board Name: nRF52840 Preview Development Kit

Model Number: PCA10056

Version: 2017.14 V0.9.1

Thank you!

[Simonr]

Hi

Does the JLink window pop up when you connect it to the computer and power it on? If so, you should be able to drag and drop the MCU firmware file (downloadable here) to the drive that opens when you power up the DK in order to get the standard firmware back onto the debugger MCU.

Best regards,

Simon

[DanielDuan277]

Hi Simonr,

No JLink window pop up when connected with computer and power it on.

Cheers.

Daniel Duan

[DanielDuan277]

Hi Simonr,

I re-flashed the interface mcu bootloader and now it works.

Thank you!