Hello,
that is obsolate, the latest you can found here - USBSerial - API references and tutorials | Mbed OS 6 Documentation
In addition you also need to place the content below to the mbed_app.json
file
{
"config": {
"usb_speed": {
"help": "USE_USB_OTG_FS or USE_USB_OTG_HS or USE_USB_HS_IN_FS",
"value": "USE_USB_OTG_FS"
}
},
"target_overrides": {
"*": {
"target.device_has_add": ["USBDEVICE"]
}
}
}
The PC application also need to manage the DTR signal .
BR, Jan