> 4 virtual COM Ports on STM32H7 using USB

[caas05]

I am trying to start 6 virtual com ports over usb. I could start 4 using a USB composite pack made by a developer. From what I have read and tried, there are not enough endpoints for 6 com ports and only maximum for 4 (9 bidrectional EPs, 1 reserved for EP0; 2 IN EPs and 1 OUT EP per com port). Is it possible to start 6 com ports at all by reusing or bypassing an IN EP?

[Gyessine]

hello @caas05 
For USB CDC class,1 IN endpoint and 1 endpoint are enough to create a virtual comport function of course alongside the control endpoint 
and since the STM32H7 USB controller supports 8 In endpoints and 8 OUT endpoints, actually you can create up to 8 VCP's.
you can refer to this article for more information about endpoints
Hope that helps.
Gyessine