叟皆了51的汇编代码，希望读大家有所帮助

用DSP控制LED，DSP采用2812.此程序在实际板子上调试通过。-DSP control with LED, DSP using 2812. This program debugging through the actual board.

一个使用flex和bison的小例子-use of a flex and bison small examples

这里以开始定义的PASCAL语言子集的源程序作为词法分析程序的输入数据。在词法分析中，自文 件头开始扫描源程序字符，一旦发现符合“单词”定义的源程序字符串时，将它翻译成固定长度的单 词内部表示，并查填适当的信息表。经过词法分析后，源程序字符串（源程序的外部表示）被翻译成 具有等长信息的单词串（源程序的内部表示），并产生两个表格：常数表和标识符表，它们分别包含 了源程序中的所有常数和所有标识符。- Here starts the PASCAL language subset source program which defines to take the lexical analyaer the data-in. In the lexical analysis, starts from the article article to scan the source program character, once discovered when conforms to "the word" the definition source program character string, translates it the fixed length the word interior to indicate, and looks up fills in the suitable information table. After the lexical analysis, the source program character string (source program exterior expression) is translated has and so on the long information the word string (source program internal expression), and produces two forms: The chart and the identifier table, they have separately contained in source program all constants and all identifiers.

c下的词法分析器代码，很实用的-c morphology analyzer code, is very practical

Shorthand是一个强大的脚本语言，是专门为基于Web的应用程序设计的。它的语法简单直观易于学习。它的引擎可在所有的 Linux 和Windows平台的流行Web服务器上运行。它支持 MySQL 和ODBC，以便用最普通的数据格式化。-Shorthand is a powerful scripting language that is specifically for Web-based application design. Its syntax is simple and intuitive and easy to learn. The engine in all the Linux and Windows platforms popular Web servers. It supports ODBC and MySQL to use the most common data format.

optional exercise4答案，比较详细-optional exercise4

NEC 78K0S系列 9222仿真初始化设置-9222 Series NEC 78K0S simulation initialization settings

一个实现图形绘画命令的编译程序,可利用命令来实现简单绘图.-A realization of graphic drawing commands compiler can use the command to achieve a simple drawing.

为了实现的编译程序实用，源程序可采用自由书写格式，即一行内可以书写多个语句，一个语句也可以占领多行书写；标识符的前20个字符有效；整数用2个字节表示；长整数用4个字节表示。这样词法分析程序的主要工作为： （1）从源程序文件中读入字符。 （2）统计行数和列数用于错误单词的定位。 （3）删除空格类字符，包括回车、制表符空格。 （4）按拼写单词，并用（种别，单词）二元式表示。 （5）根据需要是否填写标识符表供以后各阶段使用。 这里采用的编译程序的实现方法是一遍扫描，即从左到右只扫描一次源程序，也就是词法分析作为语法分析的一个子程序。故在编写词法分析程序时，用重复调用词法分析子程序取一单词的方法得到整个源程序的二元式流。 -in order to achieve the compiler practical, available free to write source code format, that his writing can be more than words, a statement can occupy multiple lines written; identifier of 20 characters effective; Integer with two byte; long integer with four byte. This lexical analysis for major work : (1) from source document read into the characters. (2) Statistics and a few mistakes out a few words for positioning. (3) delete the blank type characters, including the carriage return, tab spaces. (4) the spelling words and use (other species, words) dual ceremony. (5) whether the need for completing the table identifier subsequent stages. Here the compilers of th

一个带界面的词法分析器～～界面比较简练友好，适合初学者使用-An interface with a lexical analyzer ~ ~ more concise and friendly interface, suitable for beginners to use ~~~~~