FRDM-KL82Z no tty interface anymore

[michshell]

Hello all,

I directly copied and pasted the bin file to the board at that time still can be recongnized as a tty interface.  However, after status led flashed quickly and I unplugged and plugged the cable again, the tty interface has gone.  Also if now I use the Xpresso IDE to flash some other axf to the board.  It would show probe cannot be found.

Anyone knows how to get the usb driver back?  Thanks a lot. 

Screen Shot 2020-10-11 at 2.11.27 AM.png

But it still appears as the bootloader driver,

Screen Shot 2020-10-11 at 2.16.02 AM.png

[michshell]

I purchased a new jlink mini edu from segger and then attached it to J19 of the board (FRDM-KL82Z) and I tried it on SWG interface.  All the problems are gone.

Thank you!

[nxf56274]

nice

[michshell]

Right, I tried it on J19.  The error output about connection is slightly different, something like 'encouter error while accessing to MDM-AP'.  And if I continue with 'unlock kinetis', it gives the same error message as I previously posted.