获取当前机器的COM口的数量，包括usb转换的串口

嵌入式系统中串口通信帧的同步方法，介绍多机串口通信的各种同步方法，有效过滤干扰字节确保通信稳定，个人觉得还不错，值得一看-Embedded System serial communication frame synchronization method to introduce a variety of multi-machine synchronous serial communication methods and an effective filtering interference bytes to ensure the communication stability, and personally feel pretty good, worth a visit

windows串口编程入门-entry windows Serial Programming

Visual Basic串口通信程序设计 mscomm.vbx通信控件可直接从vb的toolbox中加入窗体form，即可用其进行通信-Visual Basic serial communication program design mscomm.vbx directly Communication Control Vb from the toolbox window into form, can be used for communication

vb演示Mscomm各种通信功能-vb demonstration of various communications functions Mscomm

一个简明的串口通讯例子-a simple and clear example for serial port communication

6017FM在山景音响初始化程序，效果很好！-6017FM in Mountain View, audio initialization procedure, good results!

XMODEM串口下载代码-XMODEM download code

云台根据其回转的特点可分为只能左右旋转的水平旋转云台和既能左右旋转又能上下旋转的全方位云台。一般来说，水平旋转角度为0°～350°，垂直旋转角度为+90°。恒速云台的水平旋转速度一般在3°～10°/s，垂直速度为4°/s左右。变速云台的水平旋转速度一般在0°～32°/s，垂直旋转速度在0°～16°/s左右。在一些高速摄像系统中，云台的水平旋转速度高达480°/s以上，垂直旋转速度在120°/s以上 -Yuntai rotation in accordance with its characteristics can be divided into only about the level of rotation and can rotate around Haeundae rotating up and down while rotating omni-directional PTZ. In general, the level of rotation angle 0 ° ~ 350 °, vertical rotation angle for+ 90 °. The level of constant rotation speed Yuntai generally 3 ° ~ 10 °/s, the vertical speed of 4 °/s or so. The level of variable rotation speed Yuntai generally 0 ° ~ 32 °/s, vertical rotation speed 0 ° ~ 16 °/s or so. In some high-speed camera system, the level of Yuntai rotating at speeds of up to 480 °/s or more, vertical rotation speed 120 °/s over

基于对话框的串口通信，三种方法中的利用添加控件的方法实现通信-Dialog-based serial communications, the use of three methods to add control methods to achieve communication

用vb实现串口间通信,可以用来熟悉串口间传输信息的原理.-with Serial Communication, which can be used with serial transmission of information between the principle.