根据已有的云台控制类库编写的基于PELCO_D和PELCO_P协议的控制界面。通过232转485接口进行数据的传送，可以完成云台八个方向的控制和摄像头的聚焦，变焦，光圈的功能。-PTZ control in accordance with the existing class library prepared PELCO_D and based on the control interface PELCO_P agreement. 485 through 232 to the transmiss