本文選題：嵌入式系統(tǒng)　切入點(diǎn)：WIFI　出處：《吉林大學(xué)》2012年碩士論文

【摘要】：在當(dāng)今數(shù)字信息技術(shù)和網(wǎng)絡(luò)通信技術(shù)高速發(fā)展的后PC時(shí)代，嵌入式系統(tǒng)以其獨(dú)特的優(yōu)點(diǎn)廣泛地滲透到消費(fèi)電子、航空航天、網(wǎng)絡(luò)通信、工業(yè)控制、醫(yī)療保健等各個(gè)領(lǐng)域。隨著嵌入式主頻越來越高，它的處理速度也越來越快，嵌入式系統(tǒng)與PC機(jī)的差距越來越小，并且還具有PC機(jī)所不能比擬的低功耗、便攜性、低熱量等特點(diǎn)，毋庸置疑，嵌入式系統(tǒng)已經(jīng)成為當(dāng)今計(jì)算機(jī)領(lǐng)域的一個(gè)亮點(diǎn)。 鑒于嵌入式系統(tǒng)的眾多優(yōu)點(diǎn)，本文應(yīng)用嵌入式開發(fā)技術(shù)、無線傳輸技術(shù)和定位技術(shù)，針對大型工程中機(jī)械操縱人員由于不知曉其他機(jī)械的位置和工作情況而造成配合不默契，工作效率低，不能順利完成整個(gè)工程的問題，提出了一種應(yīng)用于大型施工團(tuán)隊(duì)等需要互相傳輸圖像信息和位置信息場合的嵌入式終端，通過了解在本終端上顯示的其他終端的位置信息和圖像信息，，可以有效地促進(jìn)團(tuán)隊(duì)間的相互配合，提高工作效率，從而方便了人們的生活。 本文將嵌入式處理器、無線網(wǎng)絡(luò)、攝像頭和GPS模塊結(jié)合到一起，并以嵌入式Linux為開發(fā)平臺，設(shè)計(jì)了采用WIFI通信的目標(biāo)定位與檢視系統(tǒng)。此系統(tǒng)的主要功能就是通過攝像頭采集圖像信息，通過GPS獲取位置信息，然后以WIFI為媒介將圖像信息和位置信息傳送給其他的終端（本設(shè)計(jì)研發(fā)了6終端），從而實(shí)現(xiàn)了終端間位置信息和圖像信息的交互。論文的主要內(nèi)容包括系統(tǒng)的硬件設(shè)計(jì)和軟件設(shè)計(jì)，其中硬件設(shè)計(jì)包括了系統(tǒng)電路圖的設(shè)計(jì)和PCB板的制作，詳細(xì)說明了各個(gè)硬件模塊和網(wǎng)絡(luò)的電路設(shè)計(jì)以及布局、布線問題；軟件設(shè)計(jì)包括了系統(tǒng)開發(fā)環(huán)境的搭建、硬件模塊在Linux環(huán)境下的驅(qū)動(dòng)開發(fā)、內(nèi)核移植、應(yīng)用層程序的開發(fā)以及Qt圖形界面的設(shè)計(jì)，并重點(diǎn)講述了LCD驅(qū)動(dòng)與觸摸屏驅(qū)動(dòng)的開發(fā)、V4L攝像頭的應(yīng)用、使用UDP協(xié)議進(jìn)行網(wǎng)絡(luò)廣播數(shù)據(jù)的過程以及Qt地圖瀏覽器的制作。本文除了對研究方法和過程進(jìn)行詳細(xì)講解外，還對一些難點(diǎn)問題進(jìn)行了深入地討論和分析，最后對研究進(jìn)行了總結(jié)并提出了改進(jìn)意見。本設(shè)計(jì)成功地實(shí)現(xiàn)了終端間位置信息與圖像信息的交互，經(jīng)過了長時(shí)間的調(diào)試與實(shí)驗(yàn)，系統(tǒng)運(yùn)行穩(wěn)定，位置信息與圖像信息傳輸速度優(yōu)良，并且信息完整可靠，達(dá)到了預(yù)期效果。
[Abstract]:In the post-PC era with the rapid development of digital information technology and network communication technology, embedded system has been widely infiltrated into consumer electronics, aerospace, network communication and industrial control with its unique advantages. As the embedded main frequency becomes higher and higher, the processing speed of embedded system becomes faster and faster, the gap between embedded system and PC becomes smaller and smaller, and it also has the low power consumption and portability that PC can not compare. Low heat characteristics, no doubt, embedded systems have become a bright spot in the field of computer. In view of the many advantages of embedded system, this paper applies embedded development technology, wireless transmission technology and positioning technology to solve the problem that mechanical operators in large engineering do not know the location and working conditions of other machines. This paper presents an embedded terminal which needs to transmit image information and position information to each other in large construction teams because of its low working efficiency and being unable to finish the whole project successfully. By understanding the location information and image information of other terminals displayed on this terminal, we can effectively promote the mutual cooperation between teams, improve work efficiency, and thus facilitate people's lives. This paper combines embedded processor, wireless network, camera and GPS module, and takes embedded Linux as the development platform. A target location and view system using WIFI communication is designed. The main function of this system is to collect image information through camera and obtain position information through GPS. Then the image information and position information are transmitted to other terminals using WIFI as the medium. (6 terminals are developed in this design, thus realizing the interaction of position information and image information between terminals. The main content of this paper includes the hardware of the system. Part design and software design, The hardware design includes the design of the system circuit diagram and the making of the PCB board. The circuit design, layout and wiring of each hardware module and network are described in detail, and the software design includes the construction of the system development environment. The driver development of hardware module in Linux environment, kernel transplantation, application layer program development and QT graphic interface design are discussed. The application of LCD driver and touch screen driver to develop V4L camera is emphasized. The process of using UDP protocol to broadcast network data and the making of QT map browser. In addition to the detailed explanation of the research method and process, some difficult problems are discussed and analyzed in this paper. Finally, the research is summarized and some suggestions are put forward. This design successfully realizes the interaction of position information and image information between terminals. After a long period of debugging and experiment, the system runs stably. The transmission speed of position information and image information is excellent, and the information is complete and reliable.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TP368.1

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