This is not a bug report. I'm newbie to USB driver. I tried your demo, and I found there's two interfaces to support acm. And the endpoint of the first interface wasn't registered (CDC_NTF_EP). I noticed that you grouped these two interfaces together (USB_DTYPE_INTERFASEASSOC), why did you do that? Can you help me out?
This is not a bug report. I'm newbie to USB driver. I tried your demo, and I found there's two interfaces to support acm. And the endpoint of the first interface wasn't registered (CDC_NTF_EP). I noticed that you grouped these two interfaces together (USB_DTYPE_INTERFASEASSOC), why did you do that? Can you help me out?