以Visual C++为开发工具，应用与视频设备（云台和摄像头）的控制，在监控系统中有着广泛的应用。通过串口或并口发送控制指令到解码器，经过解码器后开关相应的继电器从而控制云台（摄像头）的8个方向，镜头的光圈的6种调节，辅助设备的开关。-to Visual C development tools, application and video equipment (and camera platforms) control, in the monitoring system has wide ap

微机8255并行口硬件实验 8255A的A口作为输入口，与逻辑电平开关相连。8255A的B口作为输出口，与发光二极管相连。编写程序，使得逻辑电平开关的变化在发光二极管上显示出来。-8255 microcomputer parallel port hardware experiment 8255A mouth of A as input port, and logic-level switch connected. B-I as the 8255A output connected wit

FT245芯片资料(USB转并口).比较详细-FT245 chip data (USB switch to the parallel port). More detail