用来计算一些很简单的整数的四则运算（没有括号的)

C51 LCD Keyboard driver

与中断矢量设置与读取有关的DOS功能调用，本例演示了如何编写中断服务程序，如何安装（将中断服务程序的地址设置到中断矢表中），以及如何通过软中断指令调用中断服务程序。为了突出重点，本例中中断服务程序代码未驻留内存。-and vector interrupt settings and read the DOS function calls, which in this case demonstrated how to prepare interrupted service procedures, how to install (to be interrupted service procedures set up to address the interruption vector table), and how soft interrupt directive calling service interruption program. To highlight key issues, in this case the interruption of services not the presence of code memory.

这个代码是用C语言编写的，具有记事本的常用功能，代码完整，功能完善-This code is written using C language, with the commonly used Notepad features, code integrity, and function

学习单片机的教程往往是流水灯、数码管、键盘等等。这些例程主要是熟悉单片机的端口性质，程序算法一般都比较简单。极少见结合单片机I/O端口，内部存储器以及运算技巧为一体的综合性练习。超简单单片机学习套材中的16X16汉字点阵模块提供了一个全新的学习平台。在一块只能显示一个汉字的点阵中，只利用Atmega48的内部资源实现几个汉字的移动，不但要清楚点阵的物理性能，知道如何送数据；还要了解单片机的可用资源，并通过编程利用内部存储器移动交换数据，确实是需要些技-Microcontroller tutorial to learn is often water lights, digital control, keyboard and so on. These routines are mainly familiar with the nature of microcontroller port, the program algorithm is generally relatively simple. Rare combination of microcontroller I/O ports, the internal memory and computing skills integrated exercises. Super-simple MCU learning materials in the 16X16 set of Chinese characters dot-matrix module provides a new learning platform. Can only display one character at a dot-matrix, only the use of internal resources to achieve Atmega48 few characters of the movement, not only to clear the physical properties of dot-matrix, to know how to send data also understand the MCU resources available, and programmed to exchange data using internal m

dijkstra 这是用C语言实现的贪心算法 看这个程序前最好先看看图形说明-Dijkstra this is achieved using C language greedy algorithm to see this process take a look at the graphics before the best description

用8251实现串行口异步通信，自发自收，波特率1200bps。采用查询方式发送与接收。从键盘输入发送字符。发送与接收的字符均在屏幕上显示。按esc键返回dos-Achieved with the 8251 serial asynchronous communication, spontaneous self-income, the baud rate 1200bps. Way to send and receive using queries. To send characters from the keyboard. Send and receive characters are displayed on the screen. Press esc key to return to dos

对汇编语言的基本入门知识,你可以学号汇编语言-you are so smart.and you a

利用汇编语言实现的一个打字练习程序，程序界面为典型的Dos窗口，当字符从窗口顶端掉下来后，如果按键与该字符相同，字符变为红色，在打字结束后，给出打字的统计结果，在打字过程中按ESC可退出程序 -The use of assembly language to achieve a typing practice program, the program interface for the typical Dos window, when the characters fall from the top window, if the button with the same characters, the character turns red, in the typing after the end of typing results is given , in the typing process by pressing ESC to exit

该项目是数字时钟的使用RTC DS12C887和8051微控制器（AT89C51）与时间设定，我们可以将它设置闹铃唯一不同的改进版本。它有助于理解在RTC的12C887设定报警的概念。该方案采用两个外部中断0和1，分别设定时间和闹铃。用于设置时间销P3中的微控制器8051的^2由低，这是外部中断0。对于报警设置微控制器的引脚P3.3由低是外部中断1。

拖动鼠标画线，圆，矩形的例子-Drag painting line, circle, rectangle example