Modem_source

说明：  把串口读写函数写成动态链接库，方便在不同工程之间移植。代码测试已经通过，方便大家学习使用(The serial port read-write function is written as dynamic link library, which is convenient to transplant between different projects. Code test has passed, easy to learn to use)

支持电力规约645，376.1等相关规约的485代码，支持常用电表控制信令代码，(Support the power of the Statute 645,376.1 Statute 485 and other related code, support for common control signaling code meter,)

实现串行通讯的相关API函数 API函数不仅提供了打开和读写通讯端口的操作方法，还提供了名目繁多的函数以支持对串行通讯的各种操作。 函数名 作用 CreateFile 打开串口 GetCommState 检测串口设置 SetCommState 设置串口 BuilderCommDCB 用字符串中的值来填充设备控制块 GetCommTimeouts 检测通信超时设置 SetCommTimeouts 设置通信超时参数 SetCommMask 设定被监控事件 WaitCommEvent 等待被监控事件发生 WaitForMultipleObjects 等待多个被监测对象的结果 WriteFile 发送数据 ReadFile 接收数据 GetOverlappedResult 返回最后重叠（异步）操作结果 PurgeComm 清空串口缓冲区,退出所有相关操作 ClearCommError 更新串口状态结构体,并清除所有串口硬件错误 CloseHandle 关闭串行口()

说明：  我所见过用VC写的最好的串口类，具有模拟单片机中断传输的方式，避免了查询传输CPU损耗和接收超时(I have ever seen VC was the best serial category, with simulation SCM interruption of transmission, so that the CPU for transmission and reception of overtime loss)

标准串口和模拟串口4位164动态数码管显示程序 1.CPU ：89C51 晶振2MHz 2.在proteus上仿真通过 3. 测试时将部分语句屏蔽 (Standard serial and analog serial 4 164 dynamic digital tube display program 1.CPU: 89C51 crystal 2MHz 2. The proteus simulation through 3 will be part of the statement shield test)

VB和信捷PLC通讯的源代码，包括读写，置位，独一无二哦，网上都找不到的。(vb and thinget plc communication program source,good thing)

该源代码主要是实现串口通信，并将所传输的内容实现保存。(The source code is mainly realize serial communication, and the transmission of content preservation.)

485通讯接口模块的编程应用，监控显示，检测报警显示，上下值的设置输入输出的结构(485 Communications Interface Module programming applications, monitor display, alarm detection showed that the whole value of the structure of input and output settings)

串口通信程序，MSComm方式实现，有参考价值(Serial communication program, MSComm ways, have reference value)

c++程序,对串口操作，数据对串口的收发(c++, on the serial port operation)