Hello,
I’m having problems with using mbed K64F and KL46Z boards under Windows 10. With the KL46Z boards they will run for about 20s or so and then windows probes them and the stored program is corrupted with the K64F boards, serial over USB communications will be lost although the LED keeps flashing which implies the program is still running.
The KL46Z boards have
MicroBoot Kernel Version is: 1.05
Bootloader Version is: 1.11
Application Version is: 0.00
i.e. the latest version when 20140530_k20dx128_kl46z_if_opensda.s19 is installed.
It seems that you can download the firmware to the boards? Both K64F and KL46Z are visible as diskdrive (DAPLINK something)?
Could you try another PC to isolate whether the problem is in the boards or in the PC?
If the problem seems to be on the boards you can update DAPLink from here:
Updating the KL46Z boards using the 0253_k20dx_frdmkl46z_0x8000.bin does seem to have solved the problem with the program corruption on the KL46Z Boards.
Just to add that I couln’t find anything to update either the KL46Z or the KL25Z from showing “bootloader” to “maintenance” as indicated on
Now with both the KL46Z and the K64F boards under device manager I have listed under
“Other Devices” Web:USB: CMSIS-DAP with a yellow triangle and the Device status showing “The drivers for this device are not installed (Code28)” Is that an issue?
I’ll try on the problem machine tonight to see if it resolves the issues with the K64F on that specific computer.
It shouldn’t be an issue. That interface is used only by WebUSB to allow to access a device from the browser. It is broken as it is incompatible with a serial driver you installed. It is worth pointing out that this driver should not be needed on Windows 10 to access serial. You can find this information here: Board to PC communication over USB - Tutorials | Mbed OS 5 Documentation
