Support for mixed endpoints, for example one UART + Audio

[rkrajnc]

Hi,

I'm not familiar with USB and all the descriptors, but I was wondering if it is a simple change to implement two different endpoints, for example one serial/UART and one audio? Is this already considered a composite device, which I guess would require more substantial changes to the code?

Thanks and regards.

[WangXuan95]

Need to be modified:

1. USB Descriptor: you can compare the code of single serial port and dual serial port. In addition, you need to have a look at some USB standard documents, see the reference in readme.txt.
2. Endpoint interface: The corresponding behavior needs to be implemented on the endpoint interface. You can copy the code of the audio device and serial port device on the endpoint interface and modify it.