STM3210B-LK1开发板玩USB的程序，包含固件、驱动和测试用的应用程序,上下位机通讯，很简单的实现。-The LK1 development board STM3210B-play USB-program, including firmware, drivers and test applications, the upper and lower machine communication, very simple to achieve。

该源代码演示了如何用vb语言编写上位机软件，实现和usb 5953数据采集卡的通讯，并实现计时器功能-The source code demonstrates how to write PC software using vb language, implementation and communication usb 5953 data acquisition card and realize timer function