UCOS实时系统中加入了usb d12驱动程序。可以实现和上位机通讯

ARM9s3c2410的串口通讯实验，通过上位机与下位机的串口实现键盘按键能在dnw上显示出来。-Serial Communication ARM9s3c2410 experiments, through the host computer and the next crew to achieve the serial keyboard keys can be displayed in dnw.