USB设备插入，或断开检测。 USB插入时，检测USB设备类型， 如果为存储类设备，显示可移动磁盘的盘符。 我用在图像处理图像采集设备检测。-USB device is plugged, or disconnect detection. USB plugged in, test USB device type, if the storage class device, a removable disk drive letter displays. I used in image proc

Analog data analysis processing, STM32 all the information produced by the MP3, Several new methods sar image denoising.