测试USB芯片ch372的源代码，单片机为STC11F48XE，执行速度快，用ch372的内部固件模式与PC连接并通信。可以采用外部固件模式，需要学习USB协议。-USB chip test source code ch372, singlechip STC11F48XE, the implementation of speed, with internal firmware ch372 mode and PC connectivity

USB_CH372的学习资料，很丰富，很实习，非常适合学习USB的初学者-USB_CH372 of learning materials, very rich, very practical, very suitable for beginners to learn USB