Resolved! Documentation Error UM2033 STM32F769I-DISCO
Posted on February 10, 2018 at 16:06DocID029085 Rev 2Section 6.15 Virtual COM PortMakes reference to USART3, no other reference in document, and VCP uses USART1 PA9/PA10http://www.st.com/content/ccc/resource/technical/document/user_manual/group0/7c/...