软件体系结构层次模型

本设计的目的是通过设计和调试一个简单的文件系统，主要是模拟文件操作命令的执行，来模拟文件管理，使学生对主要文件操作命令的实质和执行过程有比较深入的了解，掌握它们的基本实施方法。具体要求如下： （1） 设计一个支持n个用户的文件系统，每个用户可拥有多个文件： （2） 采用二级或二级以上的多级文件目录管理； （3） 对文件应设置存去控制保护方式，如“只能执行”、“允许读”、“允许写等”； （4） 系统的外部特征应接近于真实系统，可设置下述文件操作命令： 命 令 功 能 命 令 功 能 Create 建立文件 Read 读文件 Open 打开文件 Write 写文件 Close 关闭文件 Copy 复制文件 Delete 撤消文件 Directory 查询目录 （5） 通过键盘使用该文件系统，系统应显示操作命令的执行结果。-the purpose of this design is by designing and debugging a simple file system, main operation is simulated documents the execution of the order to simulate document management, enable students to the main document commands the substance and the implementation process of a more in-depth understanding, They grasp of the basic method. Specific requirements are as follows : (1) design a support n user file system, each user can have multiple files : (2) use of two or more than two multi-level directory management; (3) the document should be set up to deposit control and protection methods, such as "the only

TI TMS320F2810ＤＳＰ　生成ＳＶＰＷＭ程序-TI TMS320F2810DSP generation procedures SVPWM

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stack operation using c

CAN通信，用来读取发动机的转速、水温、等参数。实现CAN通信仪表的实现。可以利用其来开发发动机及汽车仪表。用C语言来进行编写，硬件平台为飞思卡尔S9S12系列单片机。

his little function rounds a number (or the elements of a vector ot matrix) towards the nearest number with N significant digits. Examples: roundsd(0.012345,3) returns 0.0123 roundsd(12345,2) returns 12000 This is a useful complement to Matlab s ROUND, ROUND10 and ROUNDN (Mapping toolbox), especially when dealing with data with a large variety of order of magnitudes. I was about to upload this file when I found "sd_round.m" by Edward Zechmann (see aknowledgment), which has similar feature (and more). But, because my script is very different in coding (much much shorter), I decided to share it anyway.

这好似一个很实用的一堆软件，大家，拿去用功相互借鉴。-This is a very practical like a pile of software, U.S., instead learn from each other hard.

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这是用C语言编写的一个小程序，它的结果是演示物理实验中的李萨如图。运行程序的时候需要把CCBP文件夹包含在头文件中。-This is the C language of a small program, and the result is a demonstration of physics experiments Lissajous figure. When operational procedures need CCBP folder contains the first document.

RCPC编码，这个是用于CCS环境下的RCPC编码。里面有三种打孔图形。-RCPC codes, this is for the CCS environment RCPC coding. There are three types of perforated graphics.