实现视频中云台功能, 包括　pelco D and Pelco P protocol, add an main(), you can use it-ptz functions, include pelco D and Pelco P protocol, add an main(), you can use it

主要描述了uPD78F1146的使用，步进电机的驱动，OSD菜单的叠加，以及PELCO-P通讯协议的实现。-Describes the uPD78F1146 the use of stepper motor-driven, OSD menu overlay, and the PELCO-P protocol implementation.

一个PELCO-D的解码板测试控制源程序，采用51单片机。-PELCO-D decoding a test control panel source code, using 51 single....

PELCO-P数据格式：1位起始位、8位数据、1位停止位，无效验位。波特率：9600B/S通用云台码值，很实用很珍贵-PELCO-P data format: 1 start bit, 8 data bits, 1 stop bit, invalid check digit. Baud Rate: 9600B/S common head code value, it is very valuable and practical