caven-3.14

This is a derivative of the previous **Caven 3.0**. At the invitation of the Lichuang community, I used the professional version of Lichuang EDA to draw a new version of **Caven**.
Design environment: Lichuang EDA professional
 
version design content includes: * Optimization of Touch buttons * On-board DAP-Link, only one TYPE-C is needed to complete the download * On-board TTL serial port, no need for external serial port debugging (serial port 3) * The IO lead out of
this board will serve as the main controller for subsequent projects. The projects on the agenda include: gallium nitride soldering station, 4-wheel drive machine vision cruiser.
At the end, write: I am the Cavendish monster at station B, give me a triple! [Bilibili Connection](https://space.bilibili.com/102898291?spm_id_from=333.1007.0.0)[GitHub Source Code](https://github.com/SwiperWiity/Core-STM32/tree/main/Caven-V3 .14)