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。...

串口程序，可以使初学者能够很轻松的学好这个编程的方法-Serial procedure allows beginners to learn is the easy programming method

用从c++编写的串口通信程序，内有详细的了解并设置串口参数的源码，并含通信原理-prepared from the use of serial communication program, with detailed understanding of serial port parameters and set up the source code, and communication with Principle

SIEMENS西门子S7-200PPI通讯协议-SIEMENS Siemens S7-200PPI communication protocol

serial port monitor

手机串口通信的源代码，不过要一个TPORT类才能编译通过本，此类可以自下载，我再上传也行-Phone serial communication" s source code, but in order to compile a category TPORT through this, since such can be downloaded, I will do and upload

这是非常有挑战性的题目。对于用户输入的任意一个平面函数f(x)，绘制出其函数曲线。这里最关键的技术难点就是如何实现计算表达式的值。在《编译原理》和《数据结构》的书中，都有对表达式运算方法的论述。说实在的，在编译型计算机语言中实现对用户输入表达式的运算是非常困难的。需要对表达式进行扫描，去括号，按照运算符的优先级生成2叉树，然后遍历该树生成逆波兰表达式，再然后通过栈的方法进行运算。如果在表达式中再包含有函数的话......描述起来都麻烦，更不要说用程序实现了:-(-This is a very challenging issue. For user input an arbitrary planar function f (x), mapping out its function curves. Here the most critical technical problems is how to achieve calculated the value of the expression. "Compiling Principle" and "data structure," the book, have right of expression Operational discussed. Indeed, the computer language compiler to achieve expression of the user input operation is very difficult. Need to scan expression to the brackets, in accordance with the priority Operators Generation 2-ary tree, and then traverse the tree generated reverse Polish expression, and then through the stack approach to computing. If the expression again contains the function described ...... these are trouble, not to mention t

使用xmodem进行串口通讯的程序- Uses xmodem to carry on the string mouth communication the procedure

GPS数据采集程序 希望对各位有用-GPS data collection procedures hope useful to you!

串口接收数据可以接受任意格式的串口的输出数据-Serial receive data can accept any format of the serial output data

8052串口驱动--(包括波特率计算,以及几个内存查看的shell命令)-8052-- (including baud rate, and several memory access to the shell commands)