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AT&T IoT Starter Kit - K64F stuck in bootloader mode.

K64F stuck in bootloader mode.
08.28.2017 05:56 PM
On a windows 7 computer I updated the firmware on the K64F without the shield connected to the board.  Once I reconnect the board to the computer the K64F device boots as expected.  Once I connect the sheild to the K64F, the board gets stuck in bootloader mode and will not exit it.  Please help.
Re: K64F stuck in bootloader mode.
08.30.2017 03:05 PM
Which firmware did you put on it?  NXP changed the method for upgrading the firmware and I've had trouble with it myself.
Try dropping this version onto it: https://att.box.com/s/e3z2914qvx3orukvisbuu4js8842ir6h
Also, make sure to not hold down the reset button when you restart the K64F.
Re: K64F stuck in bootloader mode.
08.31.2017 12:25 PM
I put the 0243_k20dx_frdmk64f_0x5000 onto the K64F.  The bootloader is version 201 and when I attempt to update the bootloader, the board will not register as connected on the computer once I unplug and then plug it back in despite the green LED flashing signifying that the device is programming itself.
Re: K64F stuck in bootloader mode.
09.13.2017 03:50 PM
Dillon,
You may have "over upgraded" the NXP board. You reference 0243 but you should upgrade to 0226 only.
You can find the binary on this page, https://developer.mbed.org/handbook/Firmware-FRDM-K64F by clicking on the link "[...]" that is listed there for version 0226.
The binary file is 0226_k20dx128_k64f_0x5000.bin and should restore the board to normal operation.
Hope that helps.