LPC55S69-evk "0 available SWD Devices detected"

[jeremygeslin]

Hi,

I followed tutorial to get started with LPCXpresso55S69 Development Board | NXP. Everything was running smoothly until the step where I built my own application based on SDK example. Indeed, after a few Build/Debug loops the board suddently stopped working.

Now, when trying to initiate Debug, the probe is properly being detected:

But SWD link to the cores seams not accessible:

Of course I tried to unplugged the board, restart MCUXpresso, even restart my computer but nothing helped. I also re-flash the on-board probe FW using LPCScript tool, but it didn't helped either.

Is there a way to repair the board ?

Regards,

Jeremy.

[Alice_Yang · Accepted solution]

Hello Jeremy,

How about erase your chip in ISP mode:

Short J10 of board, then press and release RESET button,  open GUI FLASH Tool,

choose "Mass erase" as below, then click Run..:

After completed, remove the jumper on J10, reconnect board with PC, then try to debug again.

Have a great day,
TIC

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[jeremygeslin]

The "mass erase" did the job, board is working again.

Big Thanks !!!