USBKeyboard does not work with FRDM-K22F

[Timmmm]

Description of defect

I compiled and deployed the following program for FRDM-K22F

#include "mbed.h"
#include "USBKeyboard.h"

USBKeyboard key;

#define WAIT_TIME_MS 500 
DigitalOut led1(LED1);

int main()
{
    while (true)
    {
        led1 = !led1;
        thread_sleep_for(WAIT_TIME_MS);
    }
}

After applying this fix it compiles, but when deployed to the board the board seems to freeze. The LED does not blink, and if I plug in the USB device into a Windows machine then Windows says the USB device has malfunctioned.

If I comment out USBKeyboard key; the LED blinks.

Target(s) affected by this defect ?

FRDM-K22F

Toolchain(s) (name and version) displaying this defect ?

Not sure what toolchain means in this context? I just downloaded the current version of Mbed Studio and used that.

What version of Mbed-os are you using (tag or sha) ?

mbed-os-6.3.0

What version(s) of tools are you using. List all that apply (E.g. mbed-cli)

Mbed Studio 1.3.1
mbed --version 1.10.4

How is this defect reproduced ?

See above.

[Timmmm]

Device manager has this to say:

[ciarmcom]

Thank you for raising this detailed GitHub issue. I am now notifying our internal issue triagers.
Internal Jira reference: https://jira.arm.com/browse/IOTOSM-3711

[hugueskamba]

Can you please explain why key is declared but do not used?

[Timmmm]

Just because I was making a minimal example. By the way it works with Mbed OS 2 using the online compiler (and changing thread_sleep_for() to wait(0.5)).

[0xc0170]

cc @ARMmbed/team-nxp