Bricked nRF51422 board

[kagislason]

Hi,

I have a nRF51422-EK board (Rev. 1.0) that is bricked.

1. When connected the LD3 is on.
2. Jumpers are present on P8 and debugger.
3. Device manager (win7) assigns it a port.
4. I have removed the battery and kept it disconnected for a few days but that did not help.
5. nRF Studio sees the board connected but gives a error message "No device detected" The recover option does not work, got a "Revocer all failed" - "Failed to open J-Link connection" message
6. Using J-Link Commander:

SEGGER J-Link Commander V4.72a ('?' for help) Compiled Jun 26 2013 11:49:35 DLL version V4.72a, compiled Jun 26 2013 11:49:14 Firmware: J-Link OB-SAM3U128 V1 compiled Feb 5 2013 15:27:51 Hardware: V1.00 S/N: removed VTarget = 3.300V Info: Could not measure total IR len. TDO is constant high. Info: Could not measure total IR len. TDO is constant high. No devices found on JTAG chain. Trying to find device on SWD. No device found on SWD. Did not find any core. Failed to identify target. Trying again with slow (4 kHz) speed. Info: Could not measure total IR len. TDO is constant high. Info: Could not measure total IR len. TDO is constant high. No devices found on JTAG chain. Trying to find device on SWD. No device found on SWD. Did not find any core.

Has anyone experienced this or have any suggestions to get the board running again?

Thanks!

[Bastiaan]

The board is still out of order, any thoughts would be appreciated. Thanks.

[Guest]

The board is still out of order, any thoughts would be appreciated. Thanks.

[Hung Bui]

I am sorry for a late response.

Could you take a photo of your board ? Have you make sure the board is properly powered ? Were you able to program the chip before ? If you were, do you have any idea on what may cause the chip un-responded ?

Could you try to use nrfjprog.exe tool to recover ? You can open Windows command prompt and type:

nrfjprog --recover

If error occurs, please send me a screenshot.

[kagislason]

No problem.

I was able to program the chip before and I am currently using a BLE board now for testing as the ANT board is out. The problem might be related to using the debug pins (R5/R6).

Using nrfjprog --recover I get the following errors: System off disabled until pin reset or power on reset is done. ERROR: An error occurred while connecting to the device

Using nrfjprog -p (or --pinreset) does give the error: ERROR: An error occurred while connecting to the device

[Hung Bui]

I saw that you have the jumpers on port P8 (near R5, R5) connected incorrectly. They should be connected vertically not horizontally (as in the picture)

Please refer to section 2.1 in the nRF51822 Evaluation Kit Userguide v1.0 (version 1.1 is for v2.0 Kit)

Or you can have a look at the picture here:

www.nordicsemi.com/.../nRF51822-Evaluation-Kit