用VB编写一程序,在keil环境下实现与USB主机通讯-VB prepared a procedure for the realization of keil environment with USB Host Communications

用keil c和vb开发的单片机通用usb键盘，包含固件源码，驱动，调试程序和原理图。对做相关毕业设计的人很有帮助。-with keil c and vb development of the general-purpose usb keyboard includes firmware source code, drivers, Commissioning procedures and drawings. Make relevant to the graduate design helpful.