基于μCOS-II的LPC2214的數據采集系統

電子信息工程論文編號:DZXX176  論文字數:12569,頁數:42
 目錄
 
 摘要 I
 ABSTRACT II
 第1章 引言 1
1.1 背景 1
1.2 研究內容 2
 第2章 數據采集總體設計 3
2.2 數據采集系統芯片介紹 4
2.2.1  LPC2214單片機芯片 4
2.2.2  特性 4
2.2.3片內FLASH存儲器 5
2.2.4片內靜態RAM 6
2.2.5 LPC2214寄存器 7
2.3 系統控制模塊 8
2.3.1系統控制模塊功能匯總 8
2.3.2 管腳描述 8
2.3.3 晶體振蕩器 9
2.3.4 LPC2214的管腳分布 10
 第3章 UC/OS—II操作系統介紹 11
3.1 uc/os-ii簡介 11
3.2傳統的程序流程 12
3.3基于UC／OS—II的系統程序流程 12
3.4 任務的劃分和構成 13
3.5 任務的通信和調度 14
3.6系統的工作過程 15
 第4章 數據采集系統軟件設計 16
4.1 任務main函數的設計 16
4.2 系統初始化函數的設計 16
4.3任務創建函數 17
4.4 任務執行函數設計 18
4.4.1 任務Tasktestio函數設計 19
4.4.3 數字量讀入子程序 21
4.4.4 數據采集任務函數設計 21
 第5章 結束語 24
 致謝 25
 參考文獻 26
 附錄 27

摘要

數據采集(DAQ)，是指從傳感器和其它待測設備等模擬和數字被測單元中自動采非電量或者電量信號,送到上位機中進行分析處理。是利用一種裝置，從系統外部采集數據并輸入到系統內部的一個接口。數據采集技術廣泛引用在各個領域。
 在對實時性和安全性要求較高的復雜系統（如實時圖像監控系統，網絡通信系統）中，傳統的基于單任務機制的單片機數據采集 系統很難勝任。隨著計算機技術的發展，嵌入式計算機系統（簡稱嵌入式系統）作為計算機應用的一個重要領域已深入到社會的方方面面，所謂嵌入式系統是指應用系統不是以計算機系統為主，而是把計算機技術作為應用系統的一個重要組成部分，嵌入到應用系統中區，是以應用為中心，以計算機技術為基礎，軟硬件可裁剪的專用計算機操作系統。嵌入式實時操作系統更是嵌入式系統的靈魂，她擔負著任務調度，任務控制，任務間通信與同步，資源管理，存儲管理等任務。
 本文基于嵌入式實時操作系統uc/os-ii和LPC2214單片機設計了一種典型的數據采集系統。系統的安全性，實時性好，調試方便，靈活，可擴展性強，可應用在工業儀表，圖像監控等系統中。

關鍵詞：單片機，μC/OS-II，數據采集，硬件驅動，嵌入式C語言

 
 
 
ABSTRACT
Data acquisition (DAQ), from the sensor, and other means to analog and digital equipment by measuring unit automatically by the electricity power, or to signal analysis, in the upper machine. Using a device from external data collection system and input to the internal system of an interface. Data collection technology is widely quoted in various fields.
In real-time, and safety requirements for complex system of higher as image monitoring system, network communication system), the traditional mechanism based on single chip of data acquisition system is hard to do. With the development of computer technology, embedded computer system (hereinafter referred to as the embedded system) as an important field of computer application already deeply into every aspect of society, the so-called embedded system refers to the computer system is applied, but the computer technology application system is an important part of the embedded application system, to the central is used as the center, take the computer technology as the foundation, software and hardware can cut the special computer operating system. The embedded real-time operating system is the soul of embedded systems, she bears a task scheduling, mission control and synchronization and communication between tasks, resource management, storage management, etc.
Based on embedded real-time operating system uc/OS - ii and LPC2214 SCM design a kind of typical data acquisition system. The security of the system, good real-time, convenient and flexible expandability, and can be used in industrial instrumentation, video surveillance system.

 Keywords: SCM,μC/OS-II, Data acquisition, Hardware driver,
 Embedded C