| ARM平台多进程微内核嵌入式操作系统Ymodem下载功能设计与实现 |
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| 引用本文： | 吴兆芝.ARM平台多进程微内核嵌入式操作系统Ymodem下载功能设计与实现[J].南京晓庄学院学报,2013(3):79-83,89. |
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| 作者姓名： | 吴兆芝 |
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| 作者单位： | 南京晓庄学院数学与信息技术学院,江苏南京211171 |
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| 摘 要： | 文章阐述了ARM平台多进程微内核嵌入式操作系统Ymodem下载功能设计与实现的技术细节,内容包括常用串口通信协议（Xmodem、Ymodem及Zmodem）简介,ARM平台多进程微内核嵌入式操作系统简介,Ymodem协议关键技术及下载功能编程要点.最后介绍了使用Ymodem协议设计实现Shell命令rx的基本方法与应用实例.实践证明,Ymodem协议的功能与效率明显优于Xmodem协议.同时与Zmodem协议相比,Ymodem协议又具有程序结构简单、易于理解与实现的优势.因此Ymodem协议非常适合于嵌入式操作系统下载功能的实现.
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| 关 键 词： | Ymodem协议 多进程 微内核 嵌入式操作系统 ARM |
Design and Implementation of Ymodem Downloading for Multi-Process Micro-Kernel Embedded OS on ARM |
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| WU Zhao-zhi.Design and Implementation of Ymodem Downloading for Multi-Process Micro-Kernel Embedded OS on ARM[J].Journal of Nanjing Xiaozhuang College,2013(3):79-83,89. |
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| Authors: | WU Zhao-zhi |
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| Institution: | WU Zhao-zhi (School of Mathematics and Information Technology, Nanjing Xiaozhuang University, Nanjing 211171, Jiangsu) |
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| Abstract: | This paper describes the design and implementation of Ymodem downloading for multi-process micro-ker- nel embedded operating system on ARM in technical details, including an introduction of commonly-used communi- cation protocols via serial port （ Xmodem, Ymodem, and Zmodem）, an overview of multi-process micro-kernel em- bedded operating system on ARM, and key techniques and programming essentials of Ymodem. The paper finally describes the way of designing shell command, named rx, as well as its demo with Ymodem. It has been proved that the performance and efficiency of Ymodem protocol is superior to that of Xmodem. On the other hand, com- pared with Zmodem, Ymodem protocol has such advantages as the program structure is simple and hence helpful for understanding and implementing. Therefore, Ymodem is very suitable for implementing the downloading function for embedded operating system. |
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| Keywords: | Ymodem multi-process micro-kernel embedded operating system ARM |
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