获取当前机器的COM口的数量，包括usb转换的串口

的问题.派尔高协议,控制左转右转时,出现问题.其他功能好用.我用DELPHI写的程序,在MOUSEDOWN中, str := chr($FF)+chr($01)+chr($00)+chr($04)+chr($0F)+chr($00)+chr($14) MSComm1.output := str 在CLICK事件中: str := chr($FF)+chr($01)+chr($00)+chr($00)+chr($00)+chr($00)+chr($01) MSComm1.output := str -Problem. Pelco agreement左转右转control when there are problems. Other features easy to use. DELPHI I used to write the procedures in the MouseDown, str: = chr ($ FF)+ Chr ($ 01)+ chr ($ 00)+ chr ($ 04)+ chr ($ 0F)+ chr ($ 00)+ chr ($ 14) MSComm1.output: = str in the CLICK event: str: = chr ($ FF)+ chr ($ 01)+ chr ($ 00)+ chr ($ 00)+ chr ($ 00)+ chr ($ 00)+ chr ($ 01) MSComm1.output: = str

这是一个西门子 ModBus 协议的通讯调试软件。（原码）-This is a Siemens ModBus Protocol communications software debugging. (Original code)

Advantech设计的外板预警系统。通过这个可以测出部分板卡的错误信息-Advantech designed plate early warning system. Through this part can detect the wrong message board

这是用KeilC做的nRF9E5发射程序,可以用的,是做射频的好代码.-This is done using the nRF9E5 KeilC launch procedures can be used to be so good RF code.

用蓝牙接收GPS卫星定位数据包,并存入数据库.-Bluetooth GPS receiver using satellite positioning data packets, and stored in the database.

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

本程序代码可以准确地生成1－500Hz波形文件，正弦波，方波等。具体功能，下载下来，自己运行一下就知道了-the code can be accurately produce 1-500Hz waveform, sine, square, etc.. Specific functions, downloads, running about themselves will know.

MATLAB和Visual C++-COM混合编程-MATLAB and Visual C++-COM Hybrid Programming

串口通信的一个例子，从5iVb网上下载的，但感觉不错。-a serial communication examples, from 5iVb downloading, but feeling good.

这是我做的关于考勤机的一些测试程序，请大家积极下载，很有帮助。-This is my appraisal done on the plane of some testing procedures, please download positive and helpful.