μC/OS-Ⅱ在AVR(ATmega128)上的移植應(yīng)用

食品科學(xué)論文編號:SP015  論文字數(shù):9079,頁數(shù):24

目  錄

1 引言 1
2 AVR單片機特點綜述 1
2．1 單片機內(nèi)部結(jié)構(gòu)方框圖 1
2．1．1 AVR CPU內(nèi)核介紹 3
2．2 結(jié)構(gòu)綜述 3
2．3 AVR電氣特性 4
3 μC/OS -Ⅱ系統(tǒng)的特點 4
3.1 源代碼便于移值、剪裁 4
3.2 內(nèi)核可中斷 4
3.3 共享資源可保護 6
3.4 任務(wù)間的同步和通信 6
3.5 任務(wù)棧和中斷管理 6
4 μC/OS -Ⅱ系統(tǒng)的應(yīng)用 6
4.1 μC/OS -Ⅱ在AVR微處理器上的移植過程 6
4.2 修改與處理器相關(guān)的代碼 7
4.2.1 OS_CPU.H文件 7
4.2.2 OS_CPU_C.C文件 7
4.2.3 OS_CPU_A.ASM文件 8
4.3 修改與應(yīng)用相關(guān)的代碼 8
4.3.1 INCLUDES.H文件 8
4.3.2 OS_CFG.H文件 9
5 系統(tǒng)的硬件設(shè)計 9
5.1 采集模塊 9
5.2 通信模塊 10
5.3 顯示模塊 10
5.4 模擬信號源 11
6 應(yīng)用程序（任務(wù)）設(shè)計 12
7 程序下載及在線調(diào)試 12
8 結(jié)束語 12
參考文獻: 14
附1 The Real-Time Kernel 15
附2 μC/OS Story(JEAN J.LABROSSE) 17

  摘　要

目前在單片機中移植嵌入式操作系統(tǒng)是嵌入式系統(tǒng)發(fā)展的一個熱點,也是未來發(fā)展的方向。本文介紹了嵌入式操作系統(tǒng)在單片機中應(yīng)用的優(yōu)勢和μC/OS-Ⅱ的特點,并結(jié)合AVR(ATMega128)單片機在數(shù)據(jù)采集和LCD顯示方面的應(yīng)用,分析了μC/OS-Ⅱ的移植過程和基本方法。采用μC/OS-Ⅱ可以大大簡化應(yīng)用程序設(shè)計,滿足實時要求,降低開發(fā)難度,提高系統(tǒng)可靠性。把操作系統(tǒng)配置好后，再將任務(wù)設(shè)置好執(zhí)行的優(yōu)先級經(jīng)編譯下載，這樣應(yīng)用程序連同操作系統(tǒng)就可以在單片機里運行了。最后單片機連同其外圍電路實現(xiàn)了本設(shè)計要完成的一個功能——在LCD上實時顯示采集到的模擬信號（電壓）。

關(guān)鍵詞:μC/OS-Ⅱ；AVR；數(shù)據(jù)采集；LCD

Abstract
Porting Embedded RTOS into MCU would be a hot topic of the development of embedded system at present and in the future. The paper introduces the advantages of Embedded RTOS in MCU application and the characteristic of
μC/OS-Ⅱ.It analyses the porting process and the basic method ofμC/OS-Ⅱ,combing the application of data collection and LCD display with AVR(ATmega128). This system could shortcut the design process and suit the real-time request to inhance the reliability of system. After the operated system is disposed in reasonable way and the priority set before hand with be transplanted and edit then the precedure and the operated system would be loaded into MCU. The analog voltage signal gathered in real-time will be shown on LCD, which is a function of the design realized through the periphery circuit with AVR(MCU).

Keywords:μC/OS-Ⅱ；AVR；data collection；LCD