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RTOS/AM4378: USB CDC

Part Number: AM4378


Tool/software: TI-RTOS

Hi,

I'm looking for an example of a USB CDC (Communication Device Class).

I'm working with TI RTOS (bios_6_46_01_38), CCS 6.1.3, pdk_am437x_1_0_5.

The SPRUHL7F Chapter 16 Universal Serial Bus (USB) document says:

"This document is intended to modify the existing Linux USB driver (s) or create a new driver to support this controller implementation. For those who want to modify the existing Linux USB driver (s), or create new drivers, contact your TDI sales representative for more information on how to obtain the third-party IP databook under NDA. "

How to get documentation for driver development for working with USB in CDC mode?

Who should I contact?