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。...

通过串口传输文件 说明：压缩文件并通过串口传送 要求：1M以下文件-through the serial port to transfer files : compressed files through serial transmission requirements : 1M following documents

从串口读取数据，有两种方法，1、每接收一个EV_RXCHAR,就用ReadFile读一次，这样我觉得太恐怖了。2、接收到一个EV_RXCHAR后，等一定数据量的CPU周期(GetTickCount),再一次性读取缓冲区里的数据。这样做，一般情况下不会有问题，但是，如果数据很多，过了“一定数据量的CPU周期”，还没收完数据怎么办？就会少读数据了。 我用三个线程序来完成串口数据的接收，其实就是第一种方法的变种： 一个侦听EV_RXCHAR,一个对EV_RXCHAR进行分析，其实就是超时判断。如果接收到一个消息后，一段时间没收到下一个EV_RXCHAR，就认为是一个数据包的结束。这个线程就会通知数据接收线程，进行数据接收。一般同一包数据，两个字符之间的时间间隔，应该很小了吧，而两个数据包之间的间隔，应该不会太小吧！（这个地方我不清楚，猜的:( :) ）最后一个线程，是接收数据的。-read data from the serial port, there are two methods, one, each receiving a EV_RXCHAR, on the ReadFile read, I think this vote. 2, received a EV_RXCHAR after a certain volume of data, such as CPU cycles (GetTickCount), and the one-time reader, the data buffer. To do so, under normal circumstances there is no problem, but if many of the data, and after a "certain amount of data the CPU cycles," also confiscated End Data how do? Few will read the data. I used three lines to complete serial data reception, the first method is a variant : an interception EV_RXCHAR, one pair of EV_RXCHAR analys

列示、检测所有串口，并进行错误原因提示，显示读取的内容-shown to detect all serial port, and for the wrong reasons suggest that the reading shows the contents

用VC控件MSComm编写串口通信程序的源代码，并写出详细的编程过程,仅供参考-MSComm control VC prepared serial communication program"s source code, and write a detailed programming process for reference! !

串口通信与工程实践7.1,ModemConnet.dsp,ModemConnet.h-Serial communication with the engineering practice 7.1, ModemConnet.dsp, ModemConnet.h

pascal写的一个通讯例子 -The communication example writed by pascal

是关于日历时钟芯片的C语言编程,讲解非常详细!-Calendar clock chip on the C language programming, to explain in great detail!

pc机串口通信中，数据的接收和发送的源程程序。-PCs serial communications, data reception and transmission of the source-procedures.

plcfx VB开发的串口与三菱PLC通讯源码，超值，搞工控的朋友-plcfx VB Serial communication with the source of Mitsubishi PLC, Value and engage a look at the IPC

s7comm.rar 西门子与pc通讯程序-Siemens s7comm.rar the communication process with the pc