并口驱动,所有端口与电路板上管脚相连，向并口写数据可以控制并口电平-Parallel Drive Register the parallel LED device with parport

实现一个端口永远的读写操作，让用户读取数据卡内容-Achieve a port forever read and write operations, so that users read data card content

双向通信.支持监听指定端口并转发数据.上传的是交叉编译OK最新的代码。-Two-way communication. Support to monitor the specified port and forward data. Upload the latest code is cross-compiled OK.