Solved
USB composite device
What is USB composite device?
What is USB composite device?
USB Composite Device is a peripheral device that supports more than one device class. Many different devices are implemented as composite devices.
you can take a look to our USB device composite application:
https://community.st.com/s/question/0D53W00001qLxtJSAS/usb-device-composite-applications-share-on-github
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.