μC/OS-II系统初步认识及基本数据类型

本文介绍了μC/OS-II操作系统中可移植的数据类型,如BOOLEAN、INT8U等,并讲解了全局宏的定义和使用,如OS_ENTER_CRITICAL和OS_EXIT_CRITICAL用于保护临界段代码。此外,还提到了字符显示、时间测量函数以及在多任务环境中如何保存和恢复DOS环境。

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1、INCLUDES.H增加了代码的可移植性,但同时我们在编译这些文件时需要花费额外的时间。可以在INCLUDES.H里添加用户自己的头文件

1.02

移植文件使用可移植性强的整数数据类型,分别有以下可移植的数据类型:

Typedef unsigned char  BOOLEAN;

Typedef unsigned char  INT8U;//代表8位无符号整数数据类型

Typedef signed   char  INT8S;//代表8位有符号整数数据类型

Typedef unsigned int   INT16U;//代表16位无符号整数数据类型

Typedef signed   int   INT16S;//代表16位有符号整数数据类型

Typedef unsigned long  INT32U;//代表32位无符号整数数据类型

Typedef signed   long  INT32S;//代表32位有符号整数数据类型

Typedef float         &nb

This book describes the design and implementation of mC/OS-II (pronounced "Micro C O S 2") which stands for<br>Micro-Controller Operating System Version 2. μC/OS -II is based on μC/OS, The Real-Time Kernel which was first<br>published in 1992. Thousands of people around the world are using μC/OS in all kinds of applications such as<br>cameras, medical instruments, musical instruments, engine controls, network adapters, highway telephone call boxes,<br>ATM machines, industrial robots, and many more. Nu merous colleges and Universities have also used μC/OS to<br>teach students about real-time systems.<br>μC/OS-II is upward compatible with μC/OS (V1.11) but provides many improvements over μC/OS such as the<br>addition of a fixed-sized memory manager, user definable callouts on task creation, task deletion, task switch and<br>system tick, supports TCB extensions, stack checking and, much more. I also added comments to just about every<br>function and I made μC/OS -II much easier to port to different processors. The source code in μC/OS was found in two<br>source files. Because μC/OS-II contains many new features and functions, I decided to split μC/OS-II in a few source<br>files to make the code easier to maintain.<br>If you currently have an application (i.e. product) that runs with μC/OS, your application should be able to run,<br>virtually unchanged, with μC/OS-II. All of the services (i.e. function calls) provided by μC/OS have been preserved.<br>You may, however, have to change include files and product build files to ‘point’ to the new file names.<br>This book contains ALL the source code for μC/OS-II and a port for the Intel 80x86 processor running in Real-Mode<br>and for the Large Model. The code was developed on a PC running the Microsoft Windows 95 operating system.<br>Examples run in a DOS compatible box under the Windows 95 environment. Development was done using the<br>Borland International C/C++ compiler version 3.1. Although μC/OS-II was developed and tested on a PC, mC/OS-II<br>was actually targeted for embedded systems and can easily be ported to many different processor architectures.
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