RE: nRFgo Studio: No device detected and the Recover button greyed

Johnson — Tue, 21 Jul 2015 01:54:57 GMT

I worked out what was wrong -> I was an idiot!

I cut SB9 and placed a 10 Ohm resistor on R6 a long time ago. Recently, the resistor was removed and so no current was going to VDD_nRF.

After placing a jumper across the 2-pin header (P22), nRFgo Studio could detect the chip again.

RE: nRFgo Studio: No device detected and the Recover button greyed

Susheel Nuguru — Mon, 20 Jul 2015 13:42:28 GMT

use the command tool nrfjprog and try if any of the below commands work

nrfjprog.exe -e 2)nrfjprog.exe --recover

If 1) works, you do not need to do the step 2)

if none of them work, then probably you have interrupted the segger firmware update. in that case , uninstall jlink software from your computer , go to segger and download the latest jlink driver for chip. again go to command line and type

nrfjprog -i

when it prompts you to update firmware on the chip, select ok. It normally helps if you skip when windows is "Searching driver in the windows update" as this will make the firmware upgrade timeout.

It is not very easy to destroy the chip by one wrong flash.