nrf52840 - can't find device on windows pc

RE: nrf52840 - can't find device on windows pc

Kaja — Thu, 03 Oct 2019 12:37:06 GMT

Hi,

please create a new DevZone case to get an engineer assigned to your problem.

Best regards,
Kaja

RE: nrf52840 - can't find device on windows pc

kokakora — Mon, 30 Sep 2019 04:02:10 GMT

I have tried your updated comment, and to no success on my 52840 DK, see comment below.

RE: nrf52840 - can't find device on windows pc

kokakora — Mon, 30 Sep 2019 03:57:10 GMT

I've been having a similiar issue. I believe I have J-Link installed, yet to spite the board starting up correctly (LED5 fast blinking, LED1-4 pulsing depending on BTN pressed), it does not appear in File Explorer as a JLINK removable device. I have the bin file, but no where to put it, as I cannot get the BOOTLOADER to appear either. Is there a driver I am missing???

RE: nrf52840 - can't find device on windows pc

Bjørn Kvaale — Thu, 03 May 2018 08:54:57 GMT

Have you tried my updated comment above?

RE: nrf52840 - can't find device on windows pc

kashyap velpuru — Wed, 02 May 2018 08:49:41 GMT

I tried all the above but my USB doesn't recognize my device anymore. Neither do I have the led 5 light up. I have a version 6.31 of both Segger J-link and nrf command. Please help me at the earliest. thanks!

RE: nrf52840 - can't find device on windows pc

Bjørn Kvaale — Thu, 05 Oct 2017 06:31:38 GMT

Update: What I had written previously was not completely correct. Normally, if your PC cannot detect the nrf52 device anymore, it helps to reinstall the JLink Interface MCU FW by downloading the correct FW for your development kit (see link for 52840 dk, which also works for the 52840 pdk). Should be the same interface MCU FW for the 52840 PDK & the nrf52 DK. Once you have downloaded the .bin file, you can turn the dev kit off & hold the IF BOOT/RESET button while turning the dev kit on. You should then see the dev kit show up in File Explorer as a BOOTLOADER drive. Then, you can drag & drop the .bin file to the BOOTLOADER folder. This will reset the interface MCU FW & you should be able to see the dev kit on your PC again. You may need to power cycle the dev kit at the end.