[SOLVED] How to fix a J-Link?

zzd · Dec 9th 2021, 9:59am

Hello, during the update of the firmware of my J-Link edu, the usb cable was disconnected from my computer and it is now damaged, there is no communication.

I want to know is it possible to fix my j-link in China?

SEGGER - Alex · Dec 9th 2021, 2:18pm

Hi,

plugging the USB cable during the FW update does not damage the J-Link.
All that happens is that the update is incomplete and next time you power it, it will remain in BTL mode.
In this mode, when starting J-Link Commander, you will see this:

Confirm with "OK", let it do its magic and that's it.

BR
Alex

zzd · Dec 11th 2021, 4:17am

Hello, I have tried but there is no firmware restoration confirmation window. Here is what the command window prompts.

Shell-Script

Connecting ...
- Connecting via USB to probe/ programmer device 0
- Probe/ Programmer firmware: J-Link V11 compiled Dec 1 2021 16:59:54
- Device "S32K144" selected.
- Target interface speed: 4000 kHz (Fixed)
- VTarget = 5.051V
- InitTarget() start
- InitTarget()
- Connect Under Reset
- Communication error while accessing MDM-AP.
- Connect Under Reset
- InitTarget() end
- InitTarget() start
- InitTarget()
- Connect Under Reset
- Communication error while accessing MDM-AP.
- Connect Under Reset
- InitTarget() end
- ERROR: Failed to connect.
Could not establish a connection to target.

Display All

SEGGER - Alex · Dec 14th 2021, 10:20pm

You are not getting an FW restoration dialog because your FW is not damaged….
As I wrote before: Unplugging J-Link during the FW update does not damage it.

It is more likely that your setup is broken (broken wires etc) or you programmed something into the chip that made it unresponsive to debug & programming requests.

BR
Alex

Shell-Script

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